Test1
The formula for Ammonium sulfite is
(NH4)2SO3
The formula for Ammonium hydroxide is
(NH4)OH
Choose the correct answer. What is the standard notation for 7.4 x ?
.000000074
Choose the correct answer. What is the standard notation for 7.4 x ?
0.000074
Please answer the following problem using the correct number of sig figs0.000180 x 4.00006=Enter your answer as a number only.
0.00072
Convert from 2000.4 mm to km. Do not include units in your answer.
0.0020004
What is the molality of a solution with 0.455 moles of solute in a 1.97 kg solvent? Express your answer as a number with three sig figs only. Do not enter the space-holder zero. Ex: do not enter 0.201 but instead .201
0.231
Please answer the following problem using the correct number of sig figs (decimal places)0.085 cm + 0.062 cm + 0.14 cmEnter your answer as a number only. Start with 0.
0.29
A balloon has 0.500 L of air in it with a pressure of 3.25 atm. What is the volume of the balloon with a pressure of 5.00 atm?
0.325
Convert 35 centigrams to grams. Do not include units in your answer.
0.35
Please answer the following problem using the correct number of sig figs4.819/9.8=Enter your answer as a number only.
0.49
How many significant figures are in the following number? 100
1
How many significant figures does the following number have? 0.0000000001
1
Fill in the blanks FeCl3+ NaOH--> Fe(OH)3+ NaCl
1 3 1 3
Fill in the Blanks N2+ H2 NH3
1 3 2
Write 1 million in scientific notation.
1 x 10 6
What is the final volume (L) of a 1.78 L system at 315 K and 1.10 atm if STP conditions are established? Express your answer as a number with three sig figs.
1.7
How many electrons does a charged aluminum cation have Al 3+?
10
How many protons does sodium have?
11.0
Using the equation for the Haber-Bosch process here : 4NH3 +3O2⇒2N2+ 6H2O How many liters of nitrogen gas would be produced if we start with 22.3 L of ammonia? Write your answer as a number with correct sig figs only. Be sure to use the conversion factor of 22.4 L= 1 mole of any gas and you can use the shortcut if you would like.
11.2
Find the number of moles of argon in 452 g of argon.
11.3 mol Ar
Please answer the following problem using the correct number of sig figs1.123/6.000+2.001+5.6100/5.3200 (9.900)=Enter your answer as a number only.
12.63
How many protons does a neutral aluminum atom have?
13
Please answer the following problem using the correct number of sig figs1.123/6.0+2.001+5.6/5.3 (9.9)=Enter your answer as a number only.
13.0
Please answer the following problem using the correct number of sig figs (decimal places)3.419 g + 3.912 g + 7.0518 g + 0.00013 g =Enter your answer as a number only.
14.383
Please answer the following problem using the correct number of sig figs (decimal places)30.5 g - 16.82 g + 41.07 g + 85.219 g =Enter your answer as a number only. Start with 0.
140.0
If we have the following equation: 1 cup flour + 2 eggs + 1/2 tsp baking powder---> 5 pancakes How many pancakes can we make with 3 cups of flour? Express your answer as a number only with three sig figs
15.0
A student loses 3.4 lbs in one month. How many grams did he lose? Use the following conversion factors: 1 kg = 2.205 lbs. 1000g = 1 kg. or 1 lb= 453.59 g. (Answers will be similar when using sig figs).
1500 lbs
What's the empirical formula of a molecule containing 18.7% lithium
16.3% carbon, and 65.0% oxygen?,Li2CO3
10.4 g of Arsenic reacts with 11.8 g of sulfur to produce 14.2 g of As2S3. Write the theoretical yield as a number only.
17.1
A 14.8L balloon is at 255K. What is its volume if its temperature is 304K? Answer by using a number with three sig figs only.
17.6
How many electrons does a Calcium ion with a charge of +2 have?
18.0
How many moles are 1.20x10 25 atoms of phosphorous?
19.9 mol P
How many significant figures are in the following number? 0.00090
2
Fill in the Blanks NaBr+ CaF2--> NaF+ CaBr2
2 1 2 1
Fill in the Blanks NaCl+ F---->2 NaF + CL2
2 1 2 1
Fill in the blank to balance the equation (use a 1 if needed): C8H18+ O2--> CO2+ H2O
2 25 16 18
How many significant figures does the following number have? 1300
2 - ambiguos
Using the reaction of 2 Na (s) + Cl2 (g) ---> 2 NaCl (s) If we have 53
2 g Na and 65.8 g of , what is the limiting reactant? Answer by writing the word for the product (not the formula).,chlorine, chlorine gas, CI2
Please answer the following problem using the correct number of sig figs5.08 x 1.2/ 1.90+ 2.0-3.0001=Enter your answer as a number only.
2.2
How many molecules are in 0.400 moles of N2O5?
2.41x10 23 molecN2O5
What is the amount in liters that one mole of an ideal gas can occupy? Enter your answer as a number only.
22.4
Find the mass in 2.6 mol of lithium bromide.
226 g LiBr
What mass of water can be heated from 25 degrees Celsius to 50 degrees Celsius by the addition of 2825 J? Express your answer as a number only with two sig figs.
27.0
Convert 5 degrees Celsius to Kelvins. Express your answer as a number only.
278.0
What is the formula mass of PbCI2 ?
278.1 g
The molecular formula of aspartame is . Type in the numerical answer only (with three sig figs) for its formula mass in grams.
294.0
Write a balanced chemical equation for the following description:Aluminum metal reacts with copper (II) chloride to produce aluminum chloride and copper metal.
2Al + 3CuCl2-->2AlCl3 + 3Cu
How many electrons does a neutral atom of Lithium have?
3.0
What is the density of a plastic ring that weighs 7.84 grams and takes up 2.3 cubic centimeters of space? Use correct units and sig figs in your answer.
3.4 grams per cubic centimeter
Hydrochloric acid can dissolve solid iron according to the following reaction: Fe(s) + 2HCl(aq)⇒FeCl2(aq) +H2(g) How much HCl could dissolve a 2.8 g iron padlock? Express your answer as a number with correct sig figs only.
3.7
Calculate the pH of a solution with H3O+ = 1.8x10-4M
3.74
Convert 3.59 kg into g. Do not include units in your answer.
3590.0
Convert 100 degrees Fahrenheit to Celsius. Use two sig figs in your answer. Express your answer as a number only.
38.0
Review the photosynthesis reaction: 6 CO2 (g) + 6 H2O (l) -> 6 O2 (g) + C6 H12O6(aq) How many grams of glucose can be synthesized from 58.5 g of CO2? Assume there is more than enough water present to react with all of the CO2. Express your answer as a number only with three sig figs.
39.9
How much heat must be absorbed by 375 grams of water to raise its temperature by 25 degrees Celsius? Specific heat for water= 4.184 J/g/C or K Express your answer as a number only with two sig figs. Do not use scientific notation.
39000.0
Fill in the Blanks P+ O2---> P2O5
4 5 2
How many atoms are in 0.750 moles of zinc?
4.52x10 23 atoms of Zn
Convert 7.8 km to miles. Use the following conversion factor: 1km= 0.6214 miles Use correct sig figs and units in your answer
4.8 miles
Please answer the following problem using the correct number of sig figs (decimal places)302 g - 16.82 g + 41.07 g + 85.219 g =Enter your answer as a number only. Start with 0 if needed.
411.0
Please answer the following problem using the correct number of sig figs (decimal places)143.00 cm + 289.25 cm + 68.45 cm - 6.00 cm =Enter your answer as a number only.
494.7
How many significant figures does the following number have? 5.6709
5
How many neutrons should Beryllium have with an atomic number of 4 and an atomic mass of 9 from the Periodic Table?
5.0
Write 534.67 in scientific notation.
5.3467 x 102
What's the empirical formula of a molecule containing 65.5% carbon
5.5% hydrogen, and 29.0% oxygen?,C3H3O
Convert 5.45 micrograms to femtograms. Do not include units in your answer and do not use scientific notation.
5450000000.0
What is the formula mass of NaCl?
58.45g
Sodium chloride forms in this reaction between sodium and chlorine. How many moles of NaCl result from the complete reaction of 3.4 moles of Cl2? Assume that there is more than enough Na. Express your answer as a number with two sig figs only.
6
The Lewis structure of oxygen has blank valence electrons. Express your answer as a number.
6
Which number represents Avogadro's number?
6.022x10 23
Please answer the following problem using the correct number of sig figs5.08 x 1.2=Enter your answer as a number only.
6.1
Convert 62 picometers to millimeters. Do not use units or scientific notation in your answer.
6.2e-08
Using the equation above : 4NH3 +3O2⇒2N2+ 6H2O How many liters of nitrogen gas would be produced if we start with 13.28 L of ammonia? Write your answer as a number with correct sig figs only. Be sure to use the conversion factor of 22.4 L= 1 mole of any gas and you can use the shortcut if you would like.
6.64
The percentage composition of acetic acid is found to be 39.9% C
6.7% H, and 53.4% O. Determine the empirical formula of acetic acid.,ch2o
Convert .067 microliters to liters. Do not include units in your answer.
6.7e-08
Convert 15.6 decimeters to inches using the following conversion factor: 2.54 cm = 1 inch. 1 decimeter = 0.1 meters. 1 centimeter = 0.01 meters. Use correct sig figs.
61.4 inches
What is the standard notation for the following number? 6.34 x
6340000000000
Hydrogen gas occupies 2 liters of volume at a temperature of 32 degrees Celsius. What is its temperature when it has a volume of 4 liters? Answer as a number with two sig figs only.
64.0
Convert .067 microliters to picoliters.
67000 picoliters
How many significant figures does the following number have? 1.000803
7
What is the pH of blood?
7.4
K3PO4 + Al(NO3)3→ 3KNO3 + AlPO4How many moles of potassium nitrate are produced when 2.5 moles of potassium phosphate react? Write your answer as number only.
7.5
Solve to the correct number of sig figs (decimal places)12 cm + 0.031 cm + 7969 cm = enter your answer as exact numbers only.
7981.0
A solution has a pH of 6. What is the pOH of the solution?
8
What is the pH of sea water?
8
How many neutrons should oxygen have based on its atomic number (8) and atomic mass (16) on the periodic table?
8.0
Calculate the pH of a solution with H3O+ = 7.210-9M
8.14
Convert 3.50 inches to centimeters using the following conversion factor: 2.54 cm = 1 inch. Use correct sig figs.
8.89 centimters
What is the mass of 5 moles of Fe2O3?
800 g Fe2O3
Convert 3.50 cups to liters using the following conversion factor: 4 cups = 1 quart and 1.057 quarts= 1 Liter . Use correct sig figs.
828 Liters
10.4 g of Arsenic reacts with 11.8 g of sulfur to produce 14.2 g of As2S3. What is the percent yield? Write your answer as a number with two sig figs only.
83.0
Write 0.000000091 in scientific notation.
9.1 x 10-8
How many moles of gas were added to a cylinder that started with 2.3 moles of gas and a volume of 1.4 L given that the final volume was 7.2 L? express your answer as a number with two sig figs only.
9.5
What is the formula mass of magnesium chloride? Answer with three sig figs.
95.2 g
Please show the ionic equation of the reaction of Copper II chloride with silver acetate.
A
Which of the following answers show elements in order of increasing ionization energy?
A and D answers
Which of the following substances can act as either a Lewis acid or a Lewis base? Choose all correct answers as there may be more than one.
AG+ AI3+ H2O
The name for is H2C2H3O2
Acetic acid
The formula for Aluminum sulfate is blank
Al2(SO4)3
What is the theoretical formula for Aluminum carbide?
Al4C3
The formula for Aluminum arsenide is
AlAs
Which group or family consists of elements that are very reactive and never found uncombined in nature?
Alkali Metals
The name for AlN is
Aluminum nitride
The formula for barium oxide is blank
BaO
Why is the pH scale considered a logarithmic scale?
Based upon power of ten
The formula for Beryllium chloride is blank
BeCl2
How did Rutherford's experiment show that there was a dense particle in the center of the atom that had small volume and high mass?
Because some of the alpha particles bounced straight back.
Why did Rutherford believe that the nucleus was positively charged?
Because some of the alpha particles were deflected at large angles.
How is percent composition related to determining empirical formulas
Both answers
What is the formula for boron trisulfide?
Bs3
Write the ionic equation for Iron III chloride and magnesium metal.
C
What is the molecular formula for a compound with an empirical formula of CFBrO and a molar mass of 254.7 grams per mole?
C2F2Br2O2
What is the molecular formula for a compound with an empirical formula of and a molar mass of 46 grams per mole?
C2H8N
What is the compound with an empirical formula of [math] C{2}OH{4} and a molar mass of 88 grams per mole?
C4O2H8
The compound benzamide has the following percent composition. What is the empirical formula?C = 69.40 % H= 5.825 % O = 13.21 % N= 11.57
C7H7NO
What is the formula for carbon tetrachloride?
CCI4
What is the formula for carbon dioxide?
CO2
The formula for Calcium phosphate is blank
Ca3(PO4)2
The name for CaSO4 is
Calcium sulfate
Using answer from 5.14
Calculate percent yield for the following reaction: 2As(s) +3S(l)⇒As2S3(s) when 10.4 g of As reacts with 11.8 g of S to produce 14.2 g As2S3.,b 83.0%
What is the name for cO2?
Carbon dioxide
What is the name of CuO?
Copper (II) oxide
The formula for Copper (I) carbonate is
Cu2CO3
The formula for Copper (II) chloride is
CuCl2
Fill in the Blanks The molecular equation that shows the reaction of Copper II chloride with silver acetate is blank Please show states of matter in parentheses and depict ---> to
CuCl2(aq) + 2AgC2H3O2(aq) ---> Cu(C2H3O2)2(aq) + 2AgCl(s)
Write an equation for the precipitation reaction that occurs (if any) when solutions of sodium carbonate and copper (II) chloride are mixed.
D - Na2CO3(aq) +CuCl2(aq)⇒CuCO3(s) + 2NaCl (aq)
What do resonance structures show?
Different structures for the same compound.
What is the name of O-not the common exception-but the official name?
Dihydrogen monoxide
BLANK is a physical property that describes a substances ability to be drawn or pulled into wires.
Ductility
What is the formula for iron III sulfide?
Fe2S3
What is the complete name of the most electronegative element in the periodic table?
Fluorine
The formula for Gallium nitride is
GaN
The formula for sulfurous acid is
H2SO3
The formula for Hydroselenic acid is blank
H2Se
Which substance would be labeled as the conjugate base in the following reaction? H3CCOOH(aq) + H2O(I)->H3CCOO - + H3O+
H3CCOO
Which substance below represents the hydronium ion?
H3O+
What is the formula for phosphorous acid?
H3PO3
The formula for chlorous acid is
HClO2
The formula for chloric acid is
HClO3
The formula for Hydrofluoric acid is blank
HF
The formula for hydroflouric (note: spelling varies based upon country) acid is?
HF
How did Rutherford prove something was empty?
He shot alpha particles at a piece of gold foil.
Friends of yours give about 1000 g of nuts an about 1000 g of bolts
How many nuts (average mass 4.35g) were you given?,b 230 nuts
The name of HBr is
Hydrobromic acid
The name for HI is
Hydroiodic acid
The theoretical name for H2Se is
Hydroselenic acid
Which of the following is a molecular compound?
ICl
Where is the neutron in the atom?
In the nucleus with protons
A solution has a pH of 13 and another solution has a pH of 10. How does the concentration of in the solution with a pH of 13 compare to the concentration in the solution with a pH of 10?
It is 0.001 times stronger.
What law states that "energy can be neither created nor destroyed"?
Law of Conservation of Energy
Name MgCl2.
Magnesium chloride.
The formula for Sodium phosphide is
Na3P
Which one of the formulas below are one of the 'common exceptions' for naming?
NaCl
A woman wants to determine if her engagement ring is platinum. She places the ring on a balance and finds it has a mass of 5.84 grams. She then finds that the ring displaces 0.556 of water. Is the ring made of platinum? (Density Pt = 21.4
No
Lake blank is being studied due to the disastrous results from a supersaturated solution of carbon dioxide.
Nyos
What is the name for c8P4?
Octacarbon tetraphosphide
Find P1 using Boyle's Law if the following values are used: V1= 1.90 L
P2= 4.19 atm, and V2= 1.09 L. State your answer as a number with two sig figs in atm.,2.4
A compound containing phosphorous and oxygen has a molar mass of 219.9 g/mol and an empirical formula of P2O3 . Determine its molecular formula.
P4O6
What specific business/marketing job utilizes the concept of excess reactants?
Purchaser
What does a buffer do?
Resist changes in pH.
Which is the following formulas below represent the polyatomic ion for sulfite?
SO3
Write a balanced equation for the reaction between solid silicon dioxide and solid carbon to produce solid silicon monocarbide and carbon monoxide gas.
SiO2(s) + 3C (s)-->SiC(s) + 2CO(g)
The name of AgS is
Silver (II) sulfide
The name for NaF is blank blank
Sodium fluoride
The name of NaNO3 is
Sodium nitrate
What is the name of NaCl?
Table Salt
Name P4Cl10.
Tetraphosphorous decachloride
Which of the properties below represent a physical property?
These all represent physical properties.
The name for WPO4 is
Tungsten (III) phosphate
Refer to the following chemical equation to answer this question: H2 + O2 --> 2H2O Explain this in words.
Two hydrogen atom combine with one oxygen molecule to produce two water molecules.
The formula for Vanadium (III) selenide is
V2Se3
The formula for Vanadium (V) phosphate is
V3(PO4)5
Lewis theory predicts that the formula for a compound between barium and sulfur:
a
Write the molecular equation that show the reaction of Iron III chloride with magnesium metal.
a
How many grams of oxygen would form with 2.13 g of Mercury (II) oxide? Use the following equation: 2HgO (s)⇒ 2Hg (l) + O2(g)
a 0.0787 g O2
What is the molarity of a solution that contains 15.5 g NaCl in a 1.50 L solution?
a 0.177M
What is the pressure of 760 mm Hg when expressed in units of Pa?
a 101,325 Pa
1 cup flour + 2 eggs + 1/2 tsp baking powder ⇒5 pancakes How many pancakes can we make if we have 5 eggs? Assume we have enough of all other ingredients (more on this in section to follow).
a 12.5 pancakes but really only 12 then
How many moles of NaCl result from the complete reaction of 8.2 mol Cl2? Assume more than enough Na. 2Na(s) +Cl2(g) ⇒2NaCl(s) Answer with correct sig figs.
a 16 mol NaCl
How many Liters of 0.112 M will react completely with 27.2 Liters of 0.135 M according to the equation below?
a 16.4 L
Calculate limiting reactant and theoretical yield for the following reaction: 2As(s) +3S(l)⇒As2S3(s) when 10.4 g of As reacts with 11.8 g of S to produce 14.2 g As2S3.
a 17.1 LR is As.
Zn + 2HCl → ZnCl2+ H2How many moles of hydrogen are produced from the reaction of 3.0 moles of zinc with an excess of hydrochloric acid?
a 3.0 moles H2
10.4 g of Arsenic reacts with 11.8 g of sulfur to produce 14.2 g of As2S3. What is the limiting reactant?
a As
Why do airplanes pressurize the air in their cabins?
a Because they fly between 25,000 to 40,000 feet, the pressure is about .5 atm.
How is the Bronsted-Lowry definition of acids and bases different than the Lewis definition of acids and bases?
a Bronsted-Lowry deals with protons and Lewis deals with electrons.
Which element has the highest electron affinity?
a C
Why do hot air balloons rise?
a Hot air rises because the volume of a gas at a constant pressure will increase with increasing temperature.
22.0 g of potassium reacts with 18.2 g of iodine. Calculate which reactant is limiting and how much product is made. LR=Limiting Reactant
a I2LR, 24.0 g KI
What is a spectator ion?
a Ions that are unchanged on both sides of equation and do not participate in the reaction.
Why is hydrogen considered an exception to the octet rule?
a It only needs 2 valence electrons.
Which of the following elements have the least metallic character?
a Li
How is metallic character defined?
a Metallic character is defined as how readily an atom can lose an electron.
Which of the following atoms have the following electron configuration ?
a Na
What stoichiometry steps are specifically used to calculate amount of excess reactant left over?
a Perform stoichiometry steps to convert from limiting reactant to excess reactant and then subtract that amount from the excess reactant given.
Describe colligative properties.
a Properties that depend on the number of dissolved solute particles
Which of the following elements have the lowest ionization energy?
a Rb
Why do all molecules have dispersion forces?
a Since all molecules have electrons.
How are the patterns seen in the periodic table for ionization energy and electron affinity related?
a They both have the same trends seen.
Define a Lewis acid.
a any substance that can accept a pair of nonbonding electrons.
What are some examples of bases?
a cleaning products
Which reactant gives us the theoretical yield?
a limiting
What is the formula for percent yield?
a percent yield = actual yield/ theoretical yield x 100%
What type of bond does bromine gas have?
a single bond
Classify the following reaction: magnesium metal reacts with hydrochloric acid to form aqueous magnesium chloride and hydrogen gas
a - single replacement
Acetylene
a gas in welding torches, has the empirical formula CH and a molar mass of 26.04 g/mol. What is its molecular formula?,C2H2
Classify the following reaction: Magnesium and oxygen gas produce magnesium oxide
a-Redox
What type of reaction does the following statement describe? electrons are transferred from one substance to another
a-redox
Classify the following reaction: 3Pb(s) + 2H3PO(aq) ---> 3H2(g) + Pb3(PO4)2(S)
a-single replacement
What are the two values for R in the Ideal Gas Law?
a8.314 b.08251
Lewis theory predicts that the formula for a compound between calcium and carbide is.
aCaC2 bCa4C2
Fill in the Blanks HCl (aq) + KOH (aq) --> KCl (aq) + H2O (I) is an blank reaction
acid-base
How is the Arrhenius definition of acids and bases limited?
all of the above
When placing aluminum into sulfuric acid
aluminum sulfate and hydrogen gas is formed. 18.2 g of aluminum produces blank g of hydrogen gas.,2.05
The volume of a rock displaces 22.7 mL of water
and the mass in 39.943 g. What is the density of the rock? Make sure to have correct sig figs and units in the answer you choose.,1.76 g/cubic centimeters
According to Boyle's Law
as volume increases, pressure blank1 -,decreases
Lewis theory predicts that the formula for a compound between potassium and sulfur is:
b
Please show the net ionic equation for the reaction of Copper II chloride with silver acetate.
b
What is the freezing point of a water solution using .85 m concentration? Freezing point constant is 1.86
b -1.6
Convert 38.6 mmHg to atm. (760 mmHg=1 atm which is about sea level). Use three sig figs for answer.
b .0508 atm
How much 0.115 M KI solution in liters will completely precipitate the Pb2+ in 0.104 L of 0.225M Pb(NO3)2 solution?2KI(aq) + Pb(NO3)2(aq)⇒PbI2(s)+ 2KNO3(aq)
b 0.407L KI solution
What is the molality of a solution with 12.5 g of ethylene glycol dissolved in 135 g of water?
b 1.49 m
What is the boiling point of a 1.7m ethylene glycol solution? Kb= 0.512
b 100.87° Celsius
What is the angle between electron groups if they have tetrahedral geometry?
b 109.5 degrees
C3H8 + 3O2 → 3CO2 + 4H2How many moles of oxygen are necessary to react completely with 4.0 moles of propane C3H8?
b 12 moles O2
What is the mass percent of a solution which has 27.5 g of ethanol and 175 mL of water? The density of water is 1.00 g/mL.
b 13.6 %
How many electrons can exist in an orbital?
b 2
Write a molecular equation (predict products) for the gas evolution reaction that occurs when you mix aqueous nitric acid and aqueous sodium carbonate.
b 2HNO3(aq) + Na2CO3(aq) ⇒H2O (l) + CO2(g) + 2NaNO3 (aq)
What is the pressure of a 3.00 L gas vessel that has 18.0 grams of helium at 25 degrees Celsius?
b 36.7 atm
How many electrons are being shared by a triple bond? (What is total number of electrons represented by the triple bond?)
b 6
With requires 35.7 L of 0.108 M to react with 0.117M of the . What is the volume of
b 65.9 L
Which two acid/base theories are similar to one another?
b Browsed-Lowry and Arrhenius
What should not be done when predicting products of reactions?
b Carrying over subscripts.
The Lewis structure for oxygen gas includes which of the following?
b double bond
What is a valence electron?
b electrons in outermost shell
What is the molecular geometry of carbon dioxide?
b linear
Classify the following reaction: Calcium and hydrochloric acid produce calcium chloride and hydrogen gas
b single replacement
2NaBr (aq) + Ca(OH)2 (aq) ---> CaBr2(aq)
b - double replacement
Classify the following reaction: 3HBr (aq) + Al(Oh)3(aq) ---> 3H2O(I)+ AlBr3(aq)
b acid base
Which of the following answers shows a complete and balanced equation showing the reaction of nitric acid with potassium hydroxide?
b- HNO3(aq) + KOH(aq) -> KNO3 (aq) + H2O (I)
Define limiting reactant.
bReactant that runs out first (smaller). cThis is also the theoretical yield.
Bases are not common in foods due to their blank taste.
bitter
Stoichiometry can be applied to the making of lots of foods we all enjoy such as blank1 -
blank2 , blank4 - and blank3,cheese , chocolate , wine
Identify the reactant(s) in the following reaction:
both A and B
Lewis theory predicts that the formula for a compound between flourine and calcium is:
c
What is the final volume of a .5 L gas container that increased in temperature from 299 K to 333 K when pressure increased from 1.00 atm to 1.54 atm?
c 0.362 L
How many core electrons are in a chlorine atom? Hint see larger group number.
c 10
What is the mass percent of a solution containing 27.5 g ethanol (C2H6O) and 1.75 mL of H2O. (Density of water= 1.00g/mL)
c 13.6%
Using the equation for the creation of ammonia gas. How many liters of ammonia gas would be produced if we start with 22.3 L of hydrogen? Write your answer as a number with correct sig figs only. Be sure to use the conversion factor of 22.4 L= 1 mole of any gas and you can use the shortcut if you would like.
c 14.9 L NH3 (g)
What is the molar concentration of phosphate in a 1.50 M solution?
c 4.50 M
Consider the simple synthesis reaction combining solid potassium and liquid bromine. How many grams of solid Potassium bromide would be produced with 17.8 g of solid potassium?
c 54.2 g KBr
How many valence electrons are in a chlorine atom?
c 7
2KClO3 → 2KCl + 3O2How many moles of oxygen are produced by the decomposition of 6.0 moles of potassium chlorate?
c 9.0 moles O2
Which of the following statements about Lewis structures is FALSE?
c All of the above statements are true.
How can air have a total pressure of 101.3 kPa?
c Based on Dalton's Law.
Why is step 6 (above) not a subtraction only problem?
c Because you cannot subtract one substance from a different substance (in algebra cannot subtract x from y).
Which law only applies when the amount (n) of gas is constant?
c Combined Gas Law
What is fermentation? Remember this relates to our mass to volume stoichiometry problems.
c Fermentation is the breakdown of carbohydrates in an environment where there isn't oxygen.
What is unique about nitrogen gas?
c Forms a triple bond.
What is the proper form of the combined gas law?
c P1V1/T1= P2V2/T2
Why is the following reaction a redox reaction? Zn(s) + Fe2+ (aq)⇒ Zn2+ (aq) + Fe(s)
c Zn transfers two electrons to Fe 2+.
A molecule that is polar (has uneven charges/is asymmetrical and not sharing electrons evenly) is also known as a:
c dipole
What is the molecular geometry of CCl4?
c tetrahedral
Given the mass of the excess reactant (answer from Lab Question 5.09)
calculate the mass of the bolts you would need to use up all of the nuts.,a 223.44 g
Which of the element groups below represent elements that have high melting points
can conduct heat and electricity and are malleable and ductile?,Metals
Which answer represents a compound?
carbon dioxide
The name for CO is
carbon monoxide
Match the following changes to either physical or chemical. boiling water burning magnesium ribbon
chemical physical
Write an equation for the precipitation reaction (if any) that occurs when solutions of lead (II) acetate and sodium sulfate are mixed. If no reaction occurs
choose NO REACTION.,a - Pb(C2H3O2)2 (aq) + Na2SO4(aq)⇒ PbSO4 (s) + 2NaC2H3O2(aq)
Fill in the Blanks CH4 + 2O2 --> CO2 + 2H2O is a blank
combustion
What is the pH scale based upon?
concentration of hydrogen ions
What is the final volume of a cylinder that was initially 0.5 L at 25 degrees Celsius and was then heated to 50 degrees Celsius?
d 0.542 L
An oxygen tank holds 4.5 liters of gas at 305 K. What temperature would be needed to change the volume to 2.2 liters?
d 149K
How many valence electrons are in sulfur dioxide?
d 18
How many grams of water will form when 2.48 L of H2 at STP completely react with O2?The equation to use is as follows: 2H2(g) + O2(g)--->2H2O(l) Use correct sig figs
d 2.00 g H2O
How many valence electrons are in the nitrate ion?
d 24
Which set of conditions reflect STP?
d 273 K, 1 atm
How many valence electrons are in the noble gases (Group VIIIA) all the way to the right of the periodic table.
d 8
Consider the following equation which shows the combustion of butane used in lighters: 2C4H10(g) + 13 O2(g) ⇒8CO2(g) +10 H2O (l). How many grams of water can be produced from 5.22 g of butane (C4H10)?
d 8.09 g H2O
Why don't the noble gases bond very often?
d A and C.
What is the octet rule?
d Atoms bond together by either transferring or sharing electrons so that all atoms obtain an outer shell with 8 electrons.
What other reaction types can an acid-base reaction also be?
d B and C
Why do humans not prefer bitter tastes?
d Based upon adaptations.
Which of the following atoms is the largest?
d Cs
Which are the strongest intermolecular forces listed?
d Ion-Dipole
What is the net ionic equation for the following reaction? Pb(NO3)2(aq) + 2LiCl(aq) ⇒ PbCl2(s) + 2LiNO3(aq)
d Pb2+ (aq) + 2Cl-(aq) ⇒PbCl2(s)
What is step 5 in stoichiometry problems?
d Use your mole ratio from the balanced chemical equation. (The mole conversion factor comes from the coefficients of the balanced chemical equation.)
What happens to the volume of a balloon when placed in ice water? What law does this apply to?
d Volume decreases as temperature decreases according to Charles law.
What is the formula for percent yield?
d actual yield/theoretical yield x 100%
Which of the following is considered a single group of electrons?
d all of these
Which form of bonding is seen in DNA?
d hydrogen
Which mixtures are not 'miscible'? (ability to mix without separating)
d oil and water
What are some common bases?
d sodium bicarbonate
Classify the following reaction: 2NH3(aq) + H2SO4(aq) --> (NH4)2SO4(aq)
d - synthesis
Classify the following reactions: 4C5H9O (aq) + 2702 (g) --> 20Co2(g) 18H2O(I)
d combustion
Which of the following answers shows a complete and balanced equation showing the combustion of propane (C3H8)?
d. C3H8(g) + 50(g) -> 3CO2(g) + 4H2O(I)
For the following reaction
determine what the products of this reaction will be. When you have predicted the products, balance the equation and use a table of solubility products to determine which of the products (if any) will precipitate. Assume all reactions take place in water. Feel free to use outside solubility chart if needed. __ (aq) this is actually slightly soluble-more on this in future classes+ __ HF (aq)--->,Ca(OH)2(aq) + 2HF (aq) ---> 2H2O (I) + CaF2 (s) (CaF2precipitates)
For the following reaction
determine what the products of this reaction will be. When you have predicted the products, balance the equation and use a table of solubility products to determine which of the products (if any) will precipitate. Assume all reactions take place in water._NaC2H3O2 + H2SO4 --->,2NaC2H3O2(aq) + 1H2SO4(aq) --> Na2SO4(aq) + 2CH3COOH(aq) (noprecip
For the following reaction
determine what the products of this reaction will be. When you have predicted the products, balance the equation and use a table of solubility products to determine which of the products (if any) will precipitate. Assume all reactions take place in water.__ Cu(OH)2 + H3PO4 -->,3Cu(OH)2(aq) + 2H3PO4(aq) --> 6H2O(I) + Cu3(PO4)2(S)
What is the two word term used to describe an element that exists as a pair (Ex: )?
diatomic molecule
The chemical name for water is
dihydrogen monoxide
A blank solution contains a small amount of solute relative to the amount of solvent.
dilute
What is the molarity of a solution that contains 1.58 mol of glucose in a 5.0 L solution? Express your answer as a number with two sig figs only. Do not enter a 0 before the initial decimal point. For example
do not enter 0.17 but instead enter .17.,0.32
What are some properties of bases?
e A and D
What are some properties of acids?
e B and C
1 atm is equal to:
e all of the above
Neon has blank valence electrons. Enter the word.
eight
An blank has a negligible mass.
electron
The reactant with amounts left over is called the blank reactant.
excess
Which of the following show evidence of a chemical reaction?
formation of gas
In which state of matter can the particles be easily compressed?
gas
What is deposition?
gas to solid a phase change
2HCl (aq) + K2S (aq) --> H2S (g) + 2KCl (aq) What type of reaction is this? End your answer with the word reaction.
gas-evolving reaction acid-base reaction
______blank___is the amount of heat a substance must adsorb to raise its temperature 1 degree Celsius.
heat capacity
Classify rocky road ice cream.
heterogeneous mixture
What is the two word term used to describe vanilla ice cream? Check spelling for correctness.
homogeneous mixture
For covalent compounds
how does polyatomic ions typically impact these structures?,c They add the amount of electrons needed.
Copper II chloride reacts with Sodium nitrate. If 15 g of Copper II chloride react with 20 g of Sodium nitrate
how many grams of Copper II nitrate are formed with four sig figs? Hint: Use limiting reactant starting amount.,d 20.93 g Cu (NO3) 2
Using the equation for winemaking
how many liters of carbon dioxide would be produced with 287.62 g of glucose? Enter your answer as a number with correct sig figs only.,71.5
Using your answer from 3.51
how many molecules are in 10 g of aspartame?,2.0x10 23molec
Using the answer from 3.51
how many molecules of aspartame are in 1.2 grams of aspartame?,2.46x10 21 g
Using answer from Lab Question 5.06 and information from Lab Question 5.07 (188 nuts)
how many of which reactant is left over?,b 42 nuts
If each set of nuts and bolts contains 8 bolts and 14 nuts and the equation is
how many products could you make?,a 7
Copper II chloride reacts with Sodium nitrate. If 15 g of Copper II chloride react with 20 g of Sodium nitrate
how much excess reactant is left over in this reaction? Hint: Find out how much NaNO3 is used with limiting reactant,c 1.03 g
The amount of heat gained or lost by an object is based upon which three things?
how much of material there is, what the material is, and temperature change
Based upon lab question 5.00
how much of which reactant was left over?,c 1 bolt
Copper II chloride reacts with Sodium nitrate. If 15 g of Copper II chloride react with 20 g of Sodium nitrate
how much sodium chloride can be formed-use four sig figs in your response? Hint: Smallest amount is that 'theoretical yield.' Bear in mind, this answer will be used in the continuation of this problem to achieve the objective of finding amount of excess reactant left over.,a 12.36 g NaCl
What is one method described here briefly that is used to separate the elements in a compound such as water? Check spelling.
hydrolysis
Name H2S (in aqueous solution)
hydrosulfuric acid
Initial volume in a cylinder is 750 ml
if pressure changes from 840 mm Hg to 360 mm Hg, what is the final volume of this gas?,d 1.750 L
Find the mass
in grams, of 1.00x10 23 moleculesofN2,4.65 g N2
Which of the choices below represents a chemical property?
inertness
The central atom in the chlorite anion
is surrounded by:,a two bonding and two unshared pairs of electrons
The central atom in the chlorate anion
is surrounded by:,c three bonding and one unshared pair of electrons
Temperature is the measure of the average blank energy of the molecules in a sample
kinetic
The Greek/Latin word 'plumbum' is used for Pb which is what element in the periodic table? Write your response as one word.
lead
What are some examples of acids?
lemons
Using the equation for winemaking
let's go in the opposite direction and go from volume to mass. How many grams of glucose are needed to produce with 28.3 L of carbon dioxide? Enter your answer as a number with correct sig figs only.,114.0
The blank reactant is the reactant that gets used up first and determines the amount of product for a problem.
limiting
What does l refer to when placing phases within a chemical equation?
liquid
Why is salt used when making ice cream?
lowers freezing point
blank have low heat capacities.
metals
What is the unit of measurement used in chemistry to represent atoms
molecules, and formula units? Enter one word only.,mole
The blank has the same mass as the proton which is 1 atomic mass unit.
neutron
Which of the following are forms of potential energy?
nuclear
In what reactions can we see the compound glucose being included?
photosynthesis and cellular respiration
The blank model was the model that described electrons suspended in a positively charged field
plum pudding
Fill in the Blanks AgNO3 (aq) + KCI (aq) --> AgCl(s) + KNO3 (aq)
precipitation
What type of reaction is the following: 2KI(aq) + Pb(NO3)2 (aq)---> PbI2(s) +2KNO3(aq)
precipitation
How is sodium hydroxide used?
production of soap
What does the atomic number shown above the element symbol in the periodic table represent? Use one word (singular) to answer.
proton
The density of water is 1.0 g/mL. An object with a mass of 5.8 g and volume of 3.1 mL will blank1 - Word Answer
sink
Name NaOH
sodium hydroxide
Which state of matter has particles close together in a fixed position that may be vibrating?
solid
What is solubility of CaCl2?
soluble
STP stands for blank1 blank2 - and blank3 -and is used to incorporate the conversion factor that 1 mole of an ideal gas occupies 22.4 L.
standard temperature pressure
In the making of cheese (please note different pH levels result in different cheeses-more on pH in Chapter 9)
the bacteria ferment the sugar present in milk, called lactose (C12H22O11), into lactic acid (CH3CHOHCOOH), as follows:C12H22O11 + H2O ⇾ 4 CH3CHOHCOOHIf we start with 332.9 g of lactose, how many liters (theoretically-we are assuming in this equation it is a gas for the purposes of this problem) of lactic acid can be produced?,a 87.1 L Lactic acid
4L of neon are at 323 K. The next day
the temperature decreases to 290 K, what is the new volume? Express your answer as a number with two sig figs only.,3.6
What is the molecular geometry if you have 3 single bonds and 1 lone pair? Answer as a word only-may be more than one word.
trigonal pyramidal
In this type of reaction
two aqueous compounds produce a solid product.,Precipitation
What is unique about noble gases?
unreactive
What substance has a very high specific heat capacity (thus it acts as an excellent coolant)?
water
If the number of moles of a gas initially in a 2.10 L vessel is doubled
what is the final volume of the gas in liters?,c 4.20
Solid aluminum reacts with gaseous chlorine. If you begin with 0.552 mol of aluminum and 0.887 mol of chlorine
what is the limiting reactant and theoretical yield of the product in moles?,b
Solid aluminum reacts with gaseous chlorine. If you begin with 0.552 mol of aluminum and 0.887 mol of chlorine
what is the limiting reactant and theoretical yield of the product in moles?,b Al, 0.552 mol AlCl3
Copper II chloride reacts with Sodium nitrate. If 15 g of Copper II chloride react with 20 g of Sodium nitrate
what is the limiting reactant? Use answer explanation and knowledge from 5.29 to answer.,a CuCl2
Using the same equation and given that the average mass of a bolt is 10.64 g and the average mass of a nut is 4.35 g
what is the mass of all the bolts (8) given?,a 85.12 g
If the average mass o a nut is 4.35 g and we have 14 nuts
what is the mass of all the nuts given?,b 60.9 g
Given the product is represented by and the average mass of a bolt is 10.64 g and the average mass of a nut is 4.35 g
what is the mass of one product?,c 19.34 g
Using the answer from Lab Question 5.08
what is the mass of the left over reactant?,a 182.7 g
Since you need 2x as many nuts as bolts
what is the mass of the product you could make with 94 bolts using the same equation ?,a 1817.96 g
The density of silver is 10.49 . If a sample of silver has a volume of 12.993
what is the mass? Make sure the answer has the correct number of sig figs.,136.3 grams
A sample of gas has an initial volume of 4.95 L at a pressure of 700 mm Hg. If the volume of the gas is increased to 5.38 L
what is the pressure?,b 644 mm Hg
The density of silver is 10.49 . If a sample of silver has a mass of 12.993 g
what is the volume? Make sure the answer has the correct number of sig figs.,1.239 mL or cm3
If a balloon is filled to 3.00L at 2.50 atm
what is volume of balloon at sea level?,a 7.50 L
f a molecule has 2 bonded pairs and 2 lone pairs
what will its shape be?,a bent
A specific volume of gas was maintained in a container. If the pressure of the gas in the container doubled
what would happen to the temperature?,a The temperature doubled.
Based upon lab question 5.00
which reactant is limiting?,a nuts
Using Figure 6.7 on molecular geometries above
which structure would be shown for 4 lone pairs?,d linear