Chem quizzes
0.04500ft3 to cm3.
0.04500ft3 = 1274 cm3
0.0650mi to m,
0.0650mi = 105 m
0.550in/ms to km/hr,
0.550in/ms = 50.3 km/hr
1.92$/gal to dollars per liter,
1.92$/gal = 0.507 $/L
23.50gal/min to L/s,
23.50gal/min = 1.483 L/s
AgNO3(aq)+Na2SO4(aq)→Ag2SO4(s)+NaNO3(aq)
2AgNO3(aq)+Na2SO4(aq)→Ag2SO4(s)+2NaNO3(aq)
Al(OH)3(s)+H2SO4(aq)→Al2(SO4)3(aq)+H2O(l)
2Al(OH)3(s)+3H2SO4(aq)→Al2(SO4)3(aq)+6H2O(l)
C3H6(g)+O2(g)→CO2(g)+H2O(g)
2C3H6(g)+9O2(g)→6CO2(g)+6H2O(g) combustion
C5H10O2(l)+O2(g)→CO2(g)+H2O(g) Express your answer as a balanced chemical equation. Identify all of the phases in your answer.
2C5H10O2(l)+13O2(g)→10CO2(g)+10H2O(g)
CO(g)+O2(g)→CO2(g) Express your answer as a balanced chemical equation. Identify all of the phases in your answer.
2CO(g)+O2(g)→2CO2(g)
Fe(OH)3(s)+H2SO4(aq)→Fe2(SO4)3(aq)+H2O(l) Express your answer as a balanced chemical equation. Identify all of the phases in your answer.
2Fe(OH)3(s)+3H2SO4(aq)→Fe2(SO4)3(aq)+6H2O(l)
When solid potassium chlorate is heated, it decomposes to form solid potassium chloride and oxygen gas.
2KClO3(s)→2KCl(s)+3O2(g)
NH4NO3(s)→N2(g)+O2(g)+H2O(g) Express your answer as a balanced chemical equation. Identify all of the phases in your answer.
2NH4NO3(s)→2N2(g)+O2(g)+4H2O(g)
Based on this reaction, how many moles of CO can be obtained starting with 3.0mol CH4?
3 mols
When hydrogen sulfide gas is passed over solid hot iron (III) hydroxide, the resultant reaction produces solid iron (III) sulfide and gaseous water.
3H2S(g)+2Fe(OH)3(s)→Fe2S3(s)+6H2O(g)
C2H5NH2(g)+O2(g)→CO2(g)+H2O(g)+N2(g)
4C2H5NH2(g)+15O2(g)→8CO2(g)+14H2O(g)+2N2(g)
Nitrogen monoxide and oxygen react to form nitrogen dioxide. How many NO2 molecules would form as products if the reaction had a percent yield of 75%?
6
An electric car is capable of going 225 km on a single charge. With a full charge to start, how many additional charges will it need to travel from Seattle, Washington, to San Diego, California, a distance of 1257 mi?
8 charges
Based on this reaction, how many moles of H2 can be obtained starting with 3.0mol CH4?
9 mols
9.50 days to s,
9.50 days = 8.21×105 s
If the actual yield of bromobenzene was 65.6g , what was the percentage yield?
96.0 %
Write the chemical formula for aluminum hydroxide.
Al(OH)3
Aluminum sulfide reacts with water to form aluminum hydroxide and hydrogen sulfide.
Al2S3(s)+6H2O(l)→2Al(OH)3(s)+3H2S(g)
Al4C3(s)+H2O(l)→Al(OH)3(s)+CH4(g) Express your answer as a balanced chemical equation. Identify all of the phases in your answer.
Al4C3(s)+12H2O(l)→4Al(OH)3(s)+3CH4(g)
barium bromate
Ba(BrO3)2
If the compound has a molar mass of 156 g/mol, what is its molecular formula?
C10H20O
Menthol, the substance we can smell in mentholated cough drops, is composed of C, H, and O. A 0.1206−mg sample of menthol is combusted, producing 0.3395mg of CO2 and 0.1391mg of H2O. What is the empirical formula for menthol?
C10H20O
Ibuprofen, a headache remedy, contains 75.69% C, 8.80% H, and 15.51% O by mass, and has a molar mass of 206 g/mol.
C13H18O2,C13H18O2
C5H6O(l)+O2(g)→CO2(g)+H2O(g)
C5H6O(l)+6O2(g)→5CO2(g)+3H2O(g) combustion
Combustion analysis of toluene, a common organic solvent, gives 7.03mg of CO2 and 1.64mg of H2O. If the compound contains only carbon and hydrogen, what is its empirical formula?
C7H8
Epinephrine (adrenaline), a hormone secreted into the bloodstream in times of danger or stress, contains 59.0% C, 7.1% H, 26.2% O, and 7.7% N by mass; its MW is about 180 amu.
C9H13O3N,C9H13O3N
What is the empirical formula of the hydrocarbon?
CH4
CH4(g)+Cl2(g)→CCl4(l)+HCl(g) Express your answer as a balanced chemical equation. Identify all of the phases in your answer.
CH4(g)+4Cl2(g)→CCl4(l)+4HCl(g)
Calcium hypochlorite is used in some bleaching solutions.
Ca(ClO)2
Ca3P2(s)+H2O(l)→Ca(OH)2(aq)+PH3(g)
Ca3P2(s)+6H2O(l)→3Ca(OH)2(aq)+2PH3(g)
Solid calcium carbide, CaC2, reacts with water to form an aqueous solution of calcium hydroxide and acetylene gas, C2H2.
CaC2(s)+2H2O(l)→Ca(OH)2(aq)+C2H2(g)
Cadaverine, a foul smelling substance produced by the action of bacteria on meat, contains 58.55% C, 13.81% H, and 27.40% N by mass; its molar mass is 102.2 g/mol.
Cadaverine, a foul smelling substance produced by the action of bacteria on meat, contains 58.55% C, 13.81% H, and 27.40% N by mass; its molar mass is 102.2 g/mol.
When cadmium sulfide is treated with sulfuric acid, fumes of hydrogen sulfide are given off
CdS,H2SO4,H2S
cobalt(II) hydrogen carbonate
Co(HCO3)2
chromium(III) acetate
Cr(C2H3O2)3
Write the chemical formula for copper(I) oxide.
Cu2O
iron(II) perchlorate
Fe(ClO4)2
Write the chemical formula for iron(III) carbonate.
Fe2(CO3)3
sulfurous acid
H2SO3
Hydrogen cyanide is a very poisonous gas.
HCN
hydrogen cyanide,
HCN
hypochlorous acid,
HClO
chloric acid
HClO3
Perchloric acid reacts with cadmium to form cadmium( II) perchlorate.
HClO4,Cd,Cd(ClO4)2
On treatment with hydrofluoric acid, silicon dioxide forms silicon tetrafluoride and water.
HF,SiO2,SiF4,H2O
hydroiodic acid
HI
iodic acid
HIO3
nitrous acid
HNO2
Write the chemical formula for mercury(II) bromide.
HgBr2
potassium dichromate
K2Cr2O7
K2O(s)+H2O(l)→KOH(aq)
K2O(s)+H2O(l)→2KOH(aq) combination
Write the chemical formula for potassium sulfate.
K2SO4
Magnesium hydroxide is used as a cathartic.
Mg(OH)2
Mg3N2(s)+H2SO4(aq)→MgSO4(aq)+(NH4)2SO4(aq)
Mg3N2(s)+4H2SO4(aq)→3MgSO4(aq)+(NH4)2SO4(aq)
Number of O atoms in 4.25×10−3mol Al(NO3)3
N = 2.30×1022 O atoms
Number of N atoms in 0.400mol NH3
N = 2.41×1023 atoms
Number of molecules in 6×10−6mol CH3CH2OH.
N = 3.613×1018 molecules
Number of molecules in 8.467×10−2mol C6H6
N = 5.099×1022 molecules
N2(g)+H2(g)→NH3(g)
N2(g)+3H2(g)→2NH3(g) combination
dinitrogen tetroxide
N2O4
N2O5(g)+H2O(l)→HNO3(aq) Express your answer as a balanced chemical equation. Identify all of the phases in your answer.
N2O5(g)+H2O(l)→2HNO3(aq)
NH4NO3(s)→N2O(g)+H2O(l)
NH4NO3(s)→N2O(g)+2H2O(l) decomposition
If the blue spheres represent N atoms and the red ones represent O atoms, what was the empirical formula of the original compound?
NO2
sodium phosphate
Na3PO4
Write the chemical formula for sodium hypobromite.
NaBrO
Sodium hydrogen carbonate is used as a deodorant.
NaHCO3
Which reagent is the limiting reactant when 2.82mol NaOH and 1.50mol CO2 are allowed to react?
NaOH
tetraphosphorus hexasulfide.
P4S6
When liquid phosphorus trichloride is added to water, it reacts to form aqueous phosphorous acid, H3PO3(aq), and aqueous hydrochloric acid.
PCl3(l)+3H2O(l)→H3PO3(aq)+3HCl(aq)
The substance phosphorus tri-hydride, commonly called phosphine, is a toxic gas
PH3
Sulfur dioxide reacts with water to form sulfurous acid.
SO2,H2O,H2SO3
Tin(II) fluoride has been used as a fluoride additive in toothpastes.
SnF2
TiCl4(l)+H2O(l)→TiO2(s)+HCl(aq) Express your answer as a balanced chemical equation. Identify all of the phases in your answer.
TiCl4(l)+2H2O(l)→TiO2(s)+4HCl(aq)
How many liters of wine can be held in a wine barrel whose capacity is 36gal ?
V = 1.4×102 L
A pound of coffee beans yields 30 cups of coffee (4 cups = 1 qt). How many milliliters of coffee can be obtained from 1.0 g of coffee beans?
V = 16 mL
In March 1989 the Exxon Valdez ran aground and spilled 240,000 barrels of crude petroleum off the coast of Alaska. One barrel of petroleum is equal to 42 gal. How many liters of petroleum were spilled?
V = 3.8×107 L
What is the engine piston displacement in liters of an engine whose displacement is listed as 420in3 ?
V = 6.9 L
Vanadium(III) bromide is a colored solid.
VBr3
Write the chemical formula for zinc nitrate.
Zn(NO3)2
zinc nitrate
Zn(NO3)2
Solid zinc metal reacts with sulfuric acid to form hydrogen gas and an aqueous solution of zinc (II) sulfate.
Zn(s)+H2SO4(aq)→H2(g)+ZnSO4(aq)
Zinc carbonate can be heated to form zinc oxide and carbon dioxide.
ZnCO3,ZnO,CO2
CH3COOH
acetic acid
Hydrogen sulfide is an impurity in natural gas that must be removed. One common removal method is called the Claus process, which relies on the reaction: 8H2S(g)+4O2(g)→S8(l)+8H2O(g) Under optimal conditions the Claus process gives 98% yield of S8 from H2S. If you started with 40.0 grams of H2S and 45.0 grams of O2, how many grams of S8 would be produced, assuming 98% yield?
actual yield = 37 g
(NH4)2SO4
ammonium sulfate
(NH4)2SO3
ammonium sulfite
HBrO3
bromic acid
Ca(C2H3O2)2
calcium acetate
CaSO3
calcium sulfite
H2CO3
carbonic acid
Cr2(CO3)3
chromium(III) carbonate
Cr(NO3)3
chromium(III) nitrate
CoS
cobalt(II) sulfide
Cu(OH)2
copper(II) hydroxide
N2O,
dinitrogen monoxide
N2O5,
dinitrogen pentoxide
N2O4
dinitrogen tetroxide
If the copper is drawn into wire whose diameter is 8.50mm , how many feet of copper can be obtained from the ingot? The density of copper is 8.94 g/cm3.
h = 440 ft
HBr
hydrobromic acid
IF5
iodine pentafluoride
Fe(OH)2
iron(II) hydroxide
Fe2(CO3)3
iron(III) carbonate
FeCl3
iron(III) chloride
Li2O
lithium oxide
Mass, in grams, of 2.50×10−2mol of CdS.
m = 3.61 g
The recommended adult dose of Elixophyllin, a drug used to treat asthma, is 6 mg/kg of body mass. Calculate the dose in milligrams for a 195lb person.
m = 5×102 mg
Octane has a density of 0.692 g/mL at 20 ∘C. How many grams of O2 are required to burn 14.0gal of C8H18
m = 1.28×105 g
How many grams of sodium sulfide are formed if 1.20g of hydrogen sulfide is bubbled into a solution containing 1.60g of sodium hydroxide, assuming that the sodium sulfide is made in 94.0% yield?
m = 1.47 g
How many grams of aluminum hydroxide are obtained from 15.2g of aluminum sulfide?
m = 15.8 g
How many grams of O2 are needed to burn 13.0g of C8H18?
m = 45.5 g
What is the theoretical yield of bromobenzene in this reaction when 34.0g of benzene reacts with 73.7g of bromine?
m = 68.3 g
If an automobile is able to travel 400 km on 47.1L of gasoline, what is the gas mileage in miles per gallon?
mileage = 20 mi/gal
Number of moles of NH4Cl in 106.6g of this substance.
n = 1.99 mol
How many moles of the excess reactant remain after the completion of the reaction?
n = 0.09 mol
How many moles of Na2CO3 can be produced?
n = 1.41 mol
How many moles of O2 are needed to burn 1.45mol of C8H18?
n = 18.1 mol
NO2
nitrogen dioxide
NO
nitrogen monoxide
HClO4
perchloric acid
H3PO4
phosphoric acid
K2CrO4
potassium chromate
KCN
potassium cyanide
KMnO4
potassium permanganate
Ag2Cr2O7
silver dichromate
The fizz produced when an Alka-Seltzer® tablet is dissolved in water is due to the reaction between sodium bicarbonate (NaHCO3) and citric acid (H3C6H5O7): 3NaHCO3(aq)+H3C6H5O7(aq)→3CO2(g)+3H2O(l)+Na3C6H5O7(aq) In a certain experiment 1.00g of sodium bicarbonate and 1.00g of citric acid are allowed to react. Which is the limiting reactant? How many grams of carbon dioxide form? How many grams of the excess reactant remain after the limiting reactant is completely consumed?
sodium bicarbonate m = 0.524g m = 0.24 g
NaBrO2
sodium bromite
NaH2PO4
sodium dihydrogen phosphate
NaClO
sodium hypochlorite
Moles of Zn(NO3)2 in 121.50g of this substance.
ssdsad
Sr(OH)2
strontium hydroxide
SF6
sulfur hexafluoride
If a migrating loon flies at an average speed of 15m/s , what is its average speed in mi/hr?
v = 34 mi/hr
XeO3
xenon trioxide
Mass, in grams, of 0.195mol sucrose (C12H22O11).
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