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Which statement regarding the complete combustion of a carbon compound is correct?
a. Heat is produced in the reaction and must be shown in the balanced equation.
b. Oxygen is consumed in the reaction and must be shown in the balanced equation.
c. Carbon dioxide and water are consumed in the reaction and must be shown in the balanced equation.
d. The carbon compound is consumed in the reaction but need not be shown in the balanced equation.
e. Balancing the equation requires knowing whether the products are gases or liquids

b

Which of the following cannot be determined from a balanced chemical equation?
a. The number of molecules of reactants and products.
b. The number of atoms of each element reacting.
c. Whether the reaction will proceed as written.
d. The number of moles of reactants and products.
e. The relative mass of each reactant and product.

c

In the reaction shown below, which substances are dissolved in water?
Cu(s) + H2SO4(aq) CuSO4(aq) + H2(g)
a. H2 and H2SO4
b. H2 and Cu
c. Cu
d. H2SO4 and CuSO4
e. Cu and CuSO4

d

Which of the following reactions is a combustion reaction?
a. S8(s) +8 O2(g) ® 8 SO2(g)
b. H2(g) + Cl2(g) ® 2 HCl(g)
c. 2 H2O(l) ® 2 H2(g) + O2(g)
d. 2 HgO(s) ® 2 Hg(l) + O2(g)
e. CH4(g) ® C(s) + 2 H2(g)

a

In the reaction given below, how many grams of water are consumed if 4.0 g of hydrogen gas and 32.0 g of oxygen gas are produced?
2 H2O 2 H2 + O2
a. 18.0 g
b. 4.0 g
c. 2.0 g
d. 36.0 g
e. 20.0 g

d

In the reaction given below, how many grams of sodium metal are consumed if 2.02 g of hydrogen gas are produced?
2 Na(s) + 2 H2O(l) 2 NaOH(aq) + H2(g)
a. 46.0 g
b. 5.75 g
c. 11.5 g
d. 92.0 g
e. 23.0 g

a

In the reaction given below, for every two molecules of aluminum oxide consumed, how many molecules of oxygen are produced?
2 Al2O3 4 Al + 3 O2
a. 9
b. 1
c. 2
d. 6
e. 3

e

In the reaction given below, if 12 moles of aluminum oxide are consumed, how many moles of oxygen gas are produced?
2 Al2O3 4 Al + 3 O2
a. 12
b. 6
c. 18
d. 4
e. 3

c

For the reaction given below, how many moles of aluminum will react if 12 moles of Br2 react and 8 moles of AlBr3 are produced?
2 Al + 3 Br2 2 AlBr3
a. 4
b. 12
c. 16
d. 40
e. 8

e

Classify the following reaction.
2 H2O(l) 2 H2(g) + O2(g)
a. decomposition
b. displacement
c. combustion
d. combination
e. exchange

a

Classify the following reaction.
CaCO3(s) CaO(s) + CO2(g)
a. combination
b. combustion
c. displacement
d. exchange
e. decomposition

e

Classify the following reaction.
C6H12O6(s) + 6 O2(g) 6 CO2(g) + 6 H2O(g)
a. exchange
b. combustion
c. combination
d. decomposition
e. displacement

b

Classify the following reaction.
2 Al(s) + 3 CuSO4 (aq) Al2(SO4)3(aq) + 3 Cu(s)
a. displacement
b. combustion
c. combination
d. decomposition
e. exchange

a

Classify the following reaction.
MgSO3(s) MgO(s) + SO2(g)
a. decomposition
b. combustion
c. exchange
d. combination
e. displacement

a

Classify the following reaction.
3 MgCl2 (aq) + 2 K3PO4(aq) Mg3(PO4)2(s) + 6 KCl(aq)
a. combination
b. combustion
c. decomposition
d. exchange
e. displacement

d

Potassium metal and chlorine gas react in a combination reaction to produce an ionic compound. What is the correct balanced equation for this reaction?
a. K(s) + Cl(g) ® KCl(s)
b. K(s) + Cl2(g) ® KCl2(s)
c. K2(s) + Cl2(g) ® 2 KCl(s)
d. 2 K(s) + Cl2(g) ® 2 KCl(s)
e. K(s) + Cl2(g) ® KCl(s)

d

Classify the following reaction.
CuSO4(aq) + Fe(s) FeSO4(aq) + Cu(s)
a. decomposition
b. combustion
c. exchange
d. displacement
e. combination

d

Classify the following reaction.
N2(g) + 3 H2(g) 2 NH3(g)
a. exchange
b. combination
c. decomposition
d. combustion
e. displacement

b

Classify the following reaction.
2 AgNO3(aq) + BaCl2(aq) Ba(NO3)2(aq) + 2 AgCl(s)
a. combustion
b. exchange
c. decomposition
d. combination
e. displacement

b

Classify the following reaction.
2 KClO3(s) 2 KCl(s) + 3 O2(g)
a. decomposition
b. exchange
c. combination
d. displacement
e. combustion

a

The Roman numerals in the reaction given represent the coefficients in the balanced chemical equation. What are the values of the coefficients?
I CH3OH + II O2 III CO2 + IV H2O

I II III IV
a. 2 5 2 2
b. 2 3 2 4
c. 1 3 1 2
d. 1 2 1 2
e. 4 6 4 8

b

The Roman numerals in the reaction given represent the coefficients in the balanced chemical equation. What are the values of the coefficients?
I KO2 + II H2O III KOH + IV O2

I II III IV
a. 2 1 2 1
b. 2 2 4 3
c. 8 4 8 6
d. 4 2 4 3
e. 1 1 1 1

d

The Roman numerals in the reaction given represent the coefficients in the balanced chemical equation. What are the values of the coefficients?
I NH3 + II O2 III NO + IV H2O

I II III IV
a. 4 4 4 6
b. 4 5 4 6
c. 2 5 2 3
d. 8 10 8 12
e. 2 2 2 3

b

The Roman numerals in the reaction given represent the coefficients in the balanced chemical equation. What are the values of the coefficients?
I Ni(ClO4)2 + II K2S III KClO4 + IV NiS

I II III IV
a. 1 2 1 1
b. 1 1 2 1
c. 1 1 1 2
d. 2 1 1 2
e. 1 2 2 1

b

The Roman numerals in the reaction given represent the coefficients in the balanced chemical equation. What are the values of the coefficients?
I BaCl2 + II AgNO3 III Ba(NO3)2 + IV AgCl

I II III IV
a. 2 1 1 1
b. 1 2 2 1
c. 1 2 1 2
d. 1 1 1 2
e. 1 1 2 2

c

The Roman numerals in the reaction given represent the coefficients in the balanced chemical equation. What are the values of the coefficients?
I CO + II NO III CO2 + IV N2

I II III IV
a. 1 2 2 1
b. 1 1 1 2
c. 2 2 2 3
d. 2 2 2 1
e. 2 1 2 1

d

The Roman numerals in the reaction given represent the coefficients in the balanced chemical equation. What are the values of the coefficients?
I Fe3O4 + II H2 III Fe + IV H2O

I II III IV
a. 1 2 3 2
b. 2 8 6 8
c. 1 4 3 4
d. 1 1 3 2
e. 2 4 6 4

c

The Roman numerals in the reaction given represent the coefficients in the balanced chemical equation. What are the values of the coefficients?
I Al + II H2SO4 III Al2(SO4)3 + IV H2

I II III IV
a. 2 3 1 3
b. 2 3 2 3
c. 3 1 1 3
d. 3 1 3 2
e. 4 6 1 6

a

The Roman numerals in the reaction given represent the coefficients in the balanced chemical equation. What are the values of the coefficients?
I K2S + II AlCl3 III KCl + IV Al2S3

I II III IV
a. 2 3 2 3
b. 3 2 3 2
c. 1 1 2 1
d. 3 2 6 2
e. 3 2 6 1

e

The Roman numerals in the reaction given represent the coefficients in the balanced chemical equation. What are the values of the coefficients?
I Na3PO4 + II Mg(NO3)2 III Mg3(PO4)2 + IV NaNO3

I II III IV
a. 3 2 2 3
b. 2 3 1 6
c. 3 2 3 9
d. 2 2 3 3
e. 2 1 1 6

b

How many moles of H2O are formed from the complete combustion of 45.0 g of methanol, CH3OH?
2 CH3OH + 3 O2 2 CO2 + 4 H2O
a. 0.711 mol
b. 1.41 mol
c. 50.6 mol
d. 2.81 mol
e. 1.42 mol

d

How many moles of O2 will be produced by the decomposition of 32.0 grams of hydrogen peroxide, H2O2?
2 H2O2 2 H2O + O2
a. 34.0 mol
b. 1.88 mol
c. 0.941 mol
d. 0.470 mol
e. 544 mol

d

How many grams of ammonia will be formed from the complete reaction of 0.237 moles of H2?
N2 + 3 H2 2 NH3
a. 0.158 g
b. 6.06 g
c. 0.237 g
d. 2.69 g
e. 4.04 g

d

How many moles of oxygen will be produced if 27.6 grams of Al are produced?
2 Al2O3 4 Al + 3 O2
a. 0.767 mol
b. 0.256 mol
c. 1.02 mol
d. 12.3 mol
e. 24.6 mol

a

How many grams of CuCl are formed from the complete reaction of 0.750 mol Cu?
2 Cu + Cl2 2 CuCl
a. 74.5 g
b. 32.2 g
c. 101 g
d. 43.6 g
e. 148.5 g

a

How many grams of TiCl4 are needed to produce 0.132 moles of MgCl2?
2 Mg + TiCl4 Ti + 2 MgCl2
a. 12.5 g
b. 12.6 g
c. 25.0 g
d. 6.26 g
e. 50.1 g

a

How many grams of KClO3 are needed to produce of 4.26 moles of O2?
2 KClO3 2 KCl + 3 O2
a. 136 g
b. 348 g
c. 174 g
d. 522 g
e. 783 g

b

How many grams of Fe2O3 are formed by the complete reaction of 6.75 moles of iron?
4 Fe + 3 O2 2 Fe2O3
a. 701 g
b. 242 g
c. 350 g
d. 1080 g
e. 539 g

e

How many grams of Al2O3 are formed by the complete reaction of 48.5 g of Fe2O3?
Fe2O3 + 2 Al Al2O3 + 2 Fe
a. 31.0g
b. 37.7 g
c. 26.1 g
d. 139 g
e. 62.4 g

a

How many grams of Na2O are formed by the complete reaction of 35.0 g of O2?
4 Na + O2 2 Na2O
a. 67.8 g
b. 56.7 g
c. 113 g
d. 33.9 g
e. 136 g

e

How many grams of H2 must react to produce of 75.0 g of PH3?
2 P + 3 H2 2 PH3
a. 4.45 g
b. 6.67 g
c. 2.97 g
d. 75.0 g
e. 113 g

b

In the reaction below, 8.0 g of H2 react with 7.0 g of O2. Which of the following statements is incorrect?
2 H2 + O2 2 H2O
a. More grams of water are produced than grams of oxygen are consumed.
b. More moles of water are produced than moles of oxygen are consumed.
c. More moles of hydrogen are consumed than moles of oxygen.
d. More grams of hydrogen are consumed than grams of oxygen.
e. More grams of oxygen are consumed than grams of hydrogen.

d

In the reaction given below, how many grams of C14H9Cl5 will be produced by the reaction of 25.0 g of each of the starting materials?
C2HOCl3 + 2 C6H5Cl C14H9Cl5 + H2O
a. 157 g
b. 78.7 g
c. 39.4 g
d. 121 g
e. 354 g

c

How many grams of HCl are required to completely react with 25.0 g of aluminum?
2 Al + 6 HCl 2 AlCl3 + 3 H2
a. 22.6 g
b. 136 g
c. 248 g
d. 67.5 g
e. 102 g

e

How many grams of CO2 are produced from the reaction of 5.00 g of C2H6 with 25.0 g of O2?
2 C2H6 + 7 O2 4 CO2 + 6 H2O
a. 30.0 g
b. 3.66 g
c. 7.51 g
d. 14.6 g
e. 19.6 g

d

What is the maximum possible quantity of product obtained from a chemical reaction called?
a. limiting reactant
b. percent yield
c. stoichiometric coefficients
d. molecular weight of the product
e. theoretical yield

e

The efficiency of a particular synthesis method is evaluated by determining the:
a. theoretical yield.
b. molecular weight of the product.
c. percent yield.
d. stoichiometric coefficients.
e. limiting reactant.

c

If 32.0 g of oxygen reacts with sufficient magnesium to produce magnesium oxide, what is the theoretical yield?
2 Mg + O2 2 MgO
a. 40.3 g
b. 161 g
c. 20.2 g
d. 32.0 g
e. 80.6 g

e

If 110.0 g of iron reacts with 64.0 g of oxygen, what is the theoretical yield of Fe2O3?
4 Fe + 3 O2 2 Fe2O3
a. 314.9 g
b. 157.3 g
c. 319.4 g
d. 629.2 g
e. 212.9 g

b

If 225 g of carbon reacts with excess sulfur dioxide to produce 195 g of carbon disulfide, what is the percent yield for the reaction?
5 C + 2 SO2 CS2 + 4 CO
a. 68.4%
b. 19.5%
c. 22.5%
d. 15.7%
e. 78.9%

a

If 3.45 g of magnesium reacts with 4.87 g of oxygen to produce 5.07 g magnesium oxide, what is the percent yield for the reaction?
2 Mg + O2 2 MgO
a. 60.9%
b. 41.3%
c. 82.8%
d. 68.0%
e. 88.6%

e

The complete reaction of 16.12 g of titanium with 23.88 g of chlorine (Cl2) produces a compound with the formula TixCly. What is the empirical formula of the compound?
a. TiCl4
b. TiCl2
c. Ti4Cl
d. TiCl
e. Ti2Cl

b

1 points Save
The complete reaction of 2.63 g of iron with 3.34 g of chlorine (Cl2) produces a compound with the formula FexCly. What is the empirical formula of the compound?
a. FeCl2
b. FeCl4
c. FeCl3
d. FeCl5
e. FeCl

a

The complete combustion of a hydrocarbon produces 16.48 g of CO2 and 4.508 g of H2O. What is the empirical formula of the hydrocarbon?
a. C3H4
b. CH
c. CH2
d. C3H8
e. C2H5

a

When 3.000 g of a compound containing only carbon, hydrogen, and oxygen is burned, 6.820 g CO2 and 2.792 g H2O are produced. What is the empirical formula of the compound?
a. C3H6O
b. C2H3O2
c. CH2O
d. C2H4O
e. C3H3O2

a

A decomposition reaction occurs when _____________ reactant(s) produces two or more products

one

The reaction below is an example of a(an) _____________ reaction.
6 HCl(aq) + Ca3(PO4)2(s) 3 CaCl2(aq) + 2 H3PO4(aq)

exchange

A combination reaction is considered the opposite of a(an) _____________ reaction.

decomposition

Stoichiometric coefficients found in a balanced equation can be used to derive _____________ ratios.

mole

In the reaction given, how many grams of oxygen will completely react with 18.0 g of water?
2 H2O + O2 2 H2O2

16

In the reaction given, if 25.0 g of each reactant is present, which reactant is in exess?
Si + 2 Cl2 SiCl4

silicon

The Roman numerals in the equation given represent the coefficients in the balanced chemical equation. Give their values.
I SiO2 + II C III Si + IV CO2

I=1, II=1, III=1, IV=1

The Roman numerals in the equation given represent the coefficients in the balanced chemical equation. Give their values.
I SiO2 + II C III Si + IV CO2

48.57%

What is the theoretical yield (in grams of NaCl) when 0.750 mol of sodium reacts with excess chlorine to produce NaCl?

43.83g NaCl

What is the percent yield when 0.750 mol of calcium reacts with sufficient oxygen to produce 34.4 g of CaO?

81.8%

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