CHEM 101 Final- Donovan
The formula for Ammonium sulfite is
(NH4)2SO3
The formula for Ammonium hydroxide is
(NH4)OH
What is the freezing point of a water solution using .85 m concentration? Freezing point constant is 1.86
-1.6
Convert from 2000.4 mm to km. Do not include units in your answer.
.0020004
Choose the correct answer. What is the standard notation for 7.4 x 10^-5?
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
What is the molarity of a solution that contains 15.5 g NaCl in a 1.50 L solution?
0.177M
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
What is the molarity of a solution that contains 1.58 mol of glucose (C6H12O6) 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
Convert 35 centigrams to grams. Do not include units in your answer.
0.35
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?
0.362 L
Please answer the following problem using the correct number of sig figs4.819/9.8=Enter your answer as a number only.
0.49
A balloon has 0.500 L of air in it and is submerged in water at a depth with a pressure of 3.25 atm. What is the volume of the balloon at that depth?
0.5
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?
0.542 L
How many moles of oxygen are in 6.022x10^23 molecules of oxygen?
1
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 Balance the following equation by filling in the blanks (use a 1 if needed): __FeCl3 + __NaOH --> __Fe(OH)3 + __NaCl
1 3 1 3
Fill in the Blanks Balance the following equation by filling in the blanks (use a 1 if needed): ___N2+___H2 --> ___NH3
1 3 2
What is the molality of a solution with 12.5 g of ethylene glycol (C2H6O2) dissolved in 135 g of water?
1.49 m
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.
1.70
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?
1.750 L
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
How many core electrons are in a chlorine atom? Hint see larger group number.
10
What is the pressure of 760 mm Hg when expressed in units of Pa?
101,325 Pa
What is the angle between electron groups if they have tetrahedral geometry?
109.5 degrees
How many protons does sodium have?
11
Find the number of moles of argon in 452 g of argon.
11.3
Acetylene gas (C2H2) is produced as a result of the following reaction. CaC2(s) + 2H2O(l) -> C2H2(g) + Ca(OH)2(aq) If 3.20 moles of CaC2 are consumed in this reaction, how many grams of H - 2O are needed?
115 g H2O
C3H8 + 3O2 -> 3CO2 + 4H2 How many moles of oxygen are necessary to react completely with 4.0 moles of propane (C3H8)?
12 moles of oxygen
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
What is the mass percent of a solution which has 27.5 g of ethanol (C2H6O) and 175 mL of water? The density of water is 1.00 g/mL.
13.6 %
The density of silver is 10.49 g/cm^3. If a sample of silver has a volume of 12.993 cm^3, what is the mass? Make sure the answer has the correct number of sig figs.
136.3 grams
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
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?
149K
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
15
How many Liters of 0.112 M Na2CO3 will react completely with 27.2 Liters of 0.135 M HNO3 according to the equation below? 2HNO3(aq) + Na2CO3(aq) -> H2O(l) + CO2(g) + 2NaNo3(aq)
16.4 L
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 valence electrons are in sulfur dioxide?
18
How many electrons does a Calcium ion with a charge of +2 have?
18.0
Mg(s) + 2HCl(aq) -> MgCl2(aq) +H2(g) How many grams of HCl are consumed by the reaction of 2.50 moles of magnesium?
183 g HCl
How many moles are 1.20x10^25 atoms of phosphorous?
19.9
Write 1 million in scientific notation.
1x10^6
How many electrons can exist in an orbital?
2
How many significant figures are in the following number? 0.00090
2
Fill in the Blanks Balance the following equation by filling in the blanks (use a 1 if needed): __NaBr + __CaF2 --> __NaF + __CaBr2
2 1 2 1
Fill in the Blanks Balance the following equation by filling in the blanks (use a 1 if needed): __NaCl + __F2--> __NaF + __Cl2
2 1 2 1
Fill in the Blanks Balance the following equation by filling in the blanks (use a 1 if needed): __C8H18 + __O2 --> __CO2 + __H2O
2 25 16 18
Using your answer from 3.51, how many molecules are in 10 g of aspartame?
2.0x10^22
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
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
How many molecules are in 0.400 moles of N2O5?
2.41x10^23
Using the answer from 3.51, how many molecules of aspartame are in 1.2 grams of aspartame?
2.46x10^21
Neon has two isotopes: Ne-20 (having a mass of 20 ) and Ne-22 (having a mass of 22 ). Given the following abundances of these isotopes in nature, what is the average atomic mass of neon with three sig figs? Mass number Abundance Ne-20 90% Ne-22 10%
20.2
Find the mass in 2.6 mol of lithium bromide.
226
How many valence electrons are in the nitrate ion?
24
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
Which set of conditions reflect STP?
273 K, 1 atm
Convert 5 degrees Celsius to Kelvins. Express your answer as a number only.
278.0
What is the formula mass of PbCl2
278.1 g
What is the average atomic mass (with four sig figs) of silicon given the following abundance information on the isotopes of silicon? Mass number Abundance Si-28 92.21 % Si-29 4.70 % Si-30 3.09 %
28.11
The molecular formula of aspartame is C14H18N2O5. 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
Write the ionic equation for Iron II chloride and magnesium metal.
2Fe3+(aq) +6Cl-(aq) + 3Mg(s) -> 3Mg2+(aq) +6Cl-(aq) +2Fe(s)
Write the molecular equation that show the reaction of Iron III chloride with magnesium metal.
2FeCl3(aq) +3Mg(s) -> 3MgCl2(aq) +2Fe(s)
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) (noprecipitate)
How many electrons does a neutral atom of Lithium have?
3.0
Zn + 2HCl -> ZnCl2 + H2 How many moles of hydrogen are produced from the reaction of 3.0 moles of zinc with an excess of hydrochloric acid?
3.0 moles of hydrogen
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
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
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
What is the pressure of a 3.00 L gas vessel that has 18.0 grams of helium at 25 degrees Celsius?
36.7 atm
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: 6CO2(g) + 6H2o(l) -> 6O2(g) + C6H12O6(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
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(l) + Cu3(PO4)2(s)
Fill in the Blanks Balance the following equation by filling in the blanks (use a 1 if needed): __P + __O2 --> __P2O5
4 5 2
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?
4.20
What is the molar concentration of phosphate (PO4)^3- in a 1.50 M Na3PO4 solution?
4.50 M
How many atoms are in 0.750 moles of zinc?
4.52x10^23
Find the mass, in grams, of 1.00x100^23 molecules of N2?
4.65
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
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 x10^2
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
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-8
Convert .067 microliters to liters. Do not include units in your answer.
6.7e-08
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.
6.8
What is the standard notation for the following number? 6.34 x 10^12?
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
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?
644 mm Hg
With HNO3 required 35.7 L of 0.108 M Na2CO3 to react with 0.117 M of the HNO3. What is the volume of HNO3? 2HNO3(aq) + Na2CO3(aq) -> H2O(l) + CO2(g) + 2NaNO3(aq)
65.9 L
How many significant figures does the following number have? 1.000803
7
How many valence electrons are in a chlorine atom?
7
What is the pH of pure water?
7
K3PO4 + Al(NO3)3 -> 3KNO3 + AlPO4 How many moles of potassium nitrate are produced when 2.5 moles of potassium phosphate react?
7.5 moles potassium nitrate
If a balloon is filled to 3.00L at 2.50 atm, what is volume of balloon at sea level?
7.50 L
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
Fill in the Blanks The Lewis structure of oxygen should have ___________ valence electrons. Express your answer as a number.
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+=7.2x10-9M.
8.14
Convert 3.50 inches to centimeters using the following conversion factor: 2.54 cm = 1 inch. Use correct sig figs.
8.89
What is the mass of 5 moles of Fe2O3?
800
2KClO3 -> 2KCl + 3O2 How many moles of oxygen are produced by the decomposition of 6.0 moles of potassium chlorate?
9.0 moles of oxygen
Write 0.000000091 in scientific notation.
9.1 x10^-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
Which one of the formulas below are one of the 'common exceptions' for naming? A) NaCl B) CuCl C) CsCl D) MgCl2
A
Why don't the noble gases bond very often? These do bond but are typically exceptions to normal rules. They have 2 valence electrons so have a filled shell. They have 8 total valence electrons so have a filled shell. A and C. B and D.
A and C.
What are some properties of bases? Bitter Taste Sour taste turns blue litmus paper red turns red litmus paper blue A and D B and C
A and D
The name for H2C2H3O2 is
Acetic acid
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?
Al, 0.552molAlCl3
The formula for Aluminum sulfate is
Al2(SO4)3
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.
Al3+ H2O
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
Which of the following statements about Lewis structures is FALSE? An octet is when an atom has 8 valence electrons. A covalent bond occurs when electrons are shared. All of the above statements are true.
All of the above statements are true.
The name for AlN is
Aluminum nitride
What are some properties of acids? Bitter Taste Sour taste turns blue litmus paper red turns red litmus paper blue A and D B and C
B and C
What is the formula for boron trisulfide?
BS3
The formula for barium oxide is
BaO
Lewis theory predicts that the formula for a compound between barium and sulfur:
BaS
The formula for Beryllium chloride is
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 the Bronsted-Lowry definition of acids and bases different than the Lewis definition of acids and bases?
Bronsted-Lowry deals with protons and Lewis deals with electrons.
How is percent composition related to determining empirical formulas? A) Need this an conversion factor B) Problem often starts with percents C) Both answers D) Neither answer
C
Which element has the highest electron affinity?
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
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
What is the molecular formula for a compound with an empirical formula of C2H8N and a molar mass of 46 grams per mole?
C2H8N
What's the empirical formula of a molecule containing 65.5% carbon, 5.5% hydrogen, and 29.0% oxygen?
C3H3O
Which of the following answers shows a complete and balanced equation showing the combustion of propane (C3H8)?
C3H8(g) + 5O2(g) -> 3CO2(g) +4H2O(l)
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?
CCl4
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
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. __Ca(OH)2(aq) + __HF (aq) ->
Ca(OH)2(aq) + 2HF(aq) -> 2H2O(l) + CaF(s) (CaF2precipitates)
The formula for Calcium phosphate is
Ca3(PO4)2
Lewis theory predicts that the formula for a compound between flourine and calcium is:
CaF2
Please show the net ionic equation for the reaction of Copper II chloride with silver acetate.
Cl-(aq) +Ag(aq) -> AgCl(s)
Using the reaction of 2Na(s) + Cl2(g) -> 2NaCl(s) If we have 53,2 g Na and 65.8 g of Cl2 , what is the limiting reactant? Answer by writing the word for the product (not the formula).
Cl2
What is the name of CuO?
Copper (II) oxide
Which of the following atoms is the largest?
Cs
Please show the ionic equation of the reaction of Copper II chloride with silver acetate.
Cu2+(aq) +2Cl-(aq) +2Ag+(aq) +2C2H3O2 - (aq) -> Cu2+(aq) +2C2H3O2-(aq)
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 ______________ Please show states of matter in parentheses and depict ---> to show the reaction.
CuCl2(aq) + 2AgC2H3O2(aq) ---> Cu(C2H3O2)2(aq) + 2AgCl(s)
What is the name of H2O-not the common exception-but the official name?
Dihydrogen monoxide
_____________ is a physical property that describes a substances ability to be drawn or pulled into wires.
Ductility
Which of the following answers show elements in order of increasing ionization energy? A) K, Ca, Sc, Ti B) F, Cl, Br, I C) Cr, Mo, W, Sg D) Fr, Cs, Rb, K E) A and D answers F) B and C answers
E
What is the complete name of the most electronegative element in the periodic table?
Flourine
What is unique about nitrogen gas?
Forms a triple bond.
The formula for Gallium nitride is
GaN
The formula for sulfurous acid is
H2SO3
The formula for Hydroselenic acid is
H2Se
Which substance would be labeled as the conjugate base in the following reaction? H3CCOOH(aq) + H2O(l) -> H3CCOO-+H3O+
H3CCOO-
Which substance below represents the hydronium ion?
H3O+
The formula for chlorous acid is
HClO2
The formula for chloric acid is
HClO3
The formula for Hydrofluoric acid is
HF
Which of the following answers shows a complete and balanced equation showing the reaction of nitric acid with potassium hydroxide?
HNO3(aq) +KOH(aq) -> KNO3(aq) +H2O(l)
How did Rutherford prove something was empty?
He shot alpha particles at a piece of gold foil.
The name for HI is
Hydroiodic acid
The name for H2S is
Hydrosulfuric acid
Which of the following is a molecular compound?
ICl
A solution has a pH of 13 and another solution has a pH of 10. How does the concentration of H3O+ in the solution with a pH of 13 compare to the H3O+ concentration in the solution with a pH of 10?
It is 1000 times stronger.
Lewis theory predicts that the formula for a compound between potassium and sulfur is:
K2S
What law states that "energy can be neither created nor destroyed"?
Law of Conservation of Energy
Which of the following elements have the least metallic character?
Li
What's the empirical formula of a molecule containing 18.7% lithium, 16.3% carbon, and 65.0% oxygen?
Li2CO3
How is metallic character defined?
Metallic character is defined as how readily an atom can lose an electron.
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 of the following atoms have the following electron configuration 1s22s22p63s1?
Na
The formula for Sodium phosphide is
Na3P
The name for HNO2 is
Nitrous acid
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 cm^3 of water. Is the ring made of platinum? (Density Pt = 21.4 g/cm^3)
No
Lake ______ is being studied due to the disastrous results from a supersaturated solution of carbon dioxide.
Nyos
What is the name for C8P4
Octacarbon tetraphosphide
What is the proper form of the combined gas law?
P1V1/T1= P2V2/T2
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
Match the following changes to either physical or chemical. Boiling Water Burning Magnesium Ribbon
Physical Change Chemical Change
Identify the reactant(s) in the following reaction: 2KClO3 --> 2KCl + 3O2
Potassium Chlorate KClO3
In this type of reaction, two aqueous compounds produce a solid product.
Precipitation
Which of the following elements have the lowest ionization energy?
Rb
Classify the following reaction: Magnesium and oxygen gas produce magnesium oxide
Redox
Which is the following formulas below represent the polyatomic ion for sulfite?
SO3
The name of AgS is
Silver (II) sulfide
What is the name of NaCl?
Table Salt
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?
The temperature doubled.
Which of the properties below represent a physical property?
These all represent physical properties.
For covalent compounds, how does polyatomic ions typically impact these structures?
They add the amount of electrons needed.
How are the patterns seen in the periodic table for ionization energy and electron affinity related?
They both have the same trends seen.
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
What happens to the volume of a balloon when placed in ice water? What law does this apply to?
Volume decreases as temperature decreases according to Charles law.
Classify the following reaction: 3HBr(aq) + Al(OH)3(aq) -> 3H2O(l) + AlBr3(aq)
acid-base
Fill in the Blanks The following reaction: HCl(aq) + KOH(aq) -> KCl(aq) + H2O is an ________ reaction.
acid-base
2HCl(aq) + K2S(aq) -> H2S(g) + 2Kcl(aq) What type of reaction is this? End your answer with the word reaction.
acid-base reaction
1 atm is equal to: 760 mm Hg 760 torr 101,325 Pa 14.7 psi all of the above
all of the above
How is the Arrhenius definition of acids and bases limited? does not consider electrons and protons involves hydrogen and hydroxide only Based upon aqueous solutions only all of the above
all of the above
Which of the following is considered a single group of electrons? single bond double bond triple bond all of these
all of these
Bases are not common in foods due to their ____ taste.
bitter
The name CaSO4 is
calcium sulfate
What is the name for CO2?
carbon dioxide
Which answer represents a compound?
carbon dioxide
The name for CO is
carbon monoxide
What are some examples of bases?
cleaning products
Classify the following reaction: 4C5H9O(aq) + 27O2(g) -> 20Co2(g) + 18H20(l)
combustion
Fill in the Blanks The following reaction: CH4 + 2O2 -> CO2 + 2H2O is a ______________reaction.
combustion
What is the two word term used to describe an element that exists as a pair (Ex: Cl2)?
diatomic molecule
The chemical name for water is
dihydrogen monoxide
A __________ solution contains a small amount of solute relative to the amount of solvent.
dilute
The Lewis structure for oxygen gas includes which of the following?
double bond
Classify the following reaction: 2NaBr(aq) + Ca(OH)2(aq) -> CaBr2(aq) + 2NaOH(aq)
double replacement
What other reaction types can an acid-base reaction also be?
double replacement Precipitation
Fill in the Blanks Neon has _________ valence electrons. Enter the word.
eight
An ________ has a negligible mass.
electron
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
____________ is the amount of heat a substance must adsorb to raise its temperature 1 degree Celsius.
heat capacity
What is the two word term used to describe vanilla ice cream? Check spelling for correctness.
homogeneous mixture
The name of HBr is
hydrobromic acid
What is one method described here briefly that is used to separate the elements in a compound such as water? Check spelling.
hydrolysis
Which of the choices below represents a chemical property?
inertness
What is the name for an element that has different masses? Enter the word only.
isotope
Temperature is the measure of the average ___________ 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
What is the molecular geometry of carbon dioxide?
linear
What does l refer to when placing phases within a chemical equation?
liquid
______ 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 __________ 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 _________________ model was the model that described electrons suspended in a positively charged field according to J. J. Thomson.
plum pudding
Fill in the Blanks The following reaction: AgNO3(aq) + KCl(aq) -> AgCl(s) + KNO3(aq) is a _____ reaction.
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
What type of reaction does the following statement describe? electrons are transferred from one substance to another
redox
What type of bond does bromine gas have?
single bond
Classify the following reaction: 3Pb(s) + 2H3PO4(aq) -> 3H2(g) + Pb3(PO4)2(s)
single replacement
Classify the following reaction: Calcium and hydrochloric acid produce calcium chloride and hydrogen gas
single replacement
Classify the following reaction: magnesium metal reacts with hydrochloric acid to form aqueous magnesium chloride and hydrogen gas
single replacement
The name for NaF is
sodium fluoride
The name of NaNO3 is
sodium nitrate
Which state of matter has particles close together in a fixed position that may be vibrating?
solid
Classify the following reaction: 2NH3(aq) + H2SO4(aq) -> (NH4)2SO4(aq)
synthesis
What is the molecular geometry of CCl4?
tetrahedral
The central atom in the chlorate anion, ClO3- is surrounded by:
three bonding and one unshared pair of electrons
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
The central atom in the chlorate anion, ClO2- is surrounded by:
two bonding and two unshared pairs of electrons
What substance has a very high specific heat capacity (thus it acts as an excellent coolant)?
water