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Ap Chem Rev Pt 3

Total questions: 53

Worksheet time: 2hrs 37mins

Name
Class
Date
1.
What is the percent by mass of oxygen in MgO?
a)
20%
b)
40%
c)
50%
d)
60%
2.

How many molecules are in 2.5 mol of NaCl?

a)

1.50 x1024 molecules

b)

1.50 molecules

c)

4.15 molecules

d)

1.51 x1024 molecules

3.

A student calculated the number of moles of methane (CH4) present in a 100g sample of a gaseous mixture. If the student determined that there’s 0.6 moles of methane present in the sample, what is the percent composition of methane in the sample?

a)

.096%

b)

9.6%

c)

.9%

d)

90%

4.
A 15.67 g sample of a hydrate of magnesium carbonate was heated to drive off the water. The mass was reduced to 7.58 g. What is the formula of the hydrate?
a)
MgCO3 · 5H2O
b)
MgCO3 · 4H2O
c)
MgCO3 · 6H2O
d)
MgCO3 · 1H2O
5.

What is the empirical formula of a compound that is 81.82% carbon and 18.18% hydrogen?

a)

C3H8

b)

CH4

c)

C2H2

d)

C4H10

6.
2 KClO3 → 2 KCl + 3 O2
How many moles of oxygen are produced when 6.7 moles of KClO3 decompose completely?
a)
6.7 mol
b)
1.0 mol
c)
10.1 mol
d)
4.5 mol
7.
Cl2 + 2 KBr → Br2 + 2 KCl
How many grams of potassium chloride can be produced from 356 g of chlorine and 356 g of potassium bromide?
a)
749 g
b)
223 g
c)
479 g
d)
814 g
8.

B2H6 + 3O2 -->2 HBO2 + 2 H2O

What mass of O2 will be needed to burn 36.1 g of B2H6?

a)

13.8 g

b)

3.86 g

c)

124 g

d)

198.3 g

9.

What is the percent yield of the following reaction if 145g of P2O5 reacts with 40 grams of water, but you only collect 112 grams of phosphoric acid?

3 H2O + P2O5 -> 2H3PO4

a)

80%

b)

85%

c)

77%

d)

58%

10.

Caproic acid, which is responsible for the foul odor of dirty socks, is composed of C, H, and O atoms. Combustion of a 0.225-g sample of this compound produces 0.512 g CO2 and 0.209 g H2O. What is the empirical formula of caproic acid?

a)

CH2O

b)

C2H2O

c)

C3H6O

d)

C3H4O2

11.

Balance the reaction: _AlBr3 + _K2SO4 → _KBr + _Al2(SO4)3

a)

6 AlBr3 + 1 K2SO4 → 6 KBr + 1 Al2(SO4)3

b)

2 AlBr3 + 3 K2SO4 → 6 KBr + 1 Al2(SO4)3

c)

1 AlBr3 + 1 K2SO4 → 2 KBr + 3 Al2(SO4)3

d)

2 AlBr3 + 3 K2SO4 → 1 KBr + 2 Al2(SO4)3

12.
Fe + S --> FeS
If 7.62g Fe react with 8.67g S, what is the limiting reactant?
a)
Fe
b)
S
c)
FeS
d)
none 
13.

What is the mass of 5.43x1024 molecules of BeO?

a)

171 g

b)

3.29 x1048 g

c)

0.361 g

d)

7.83 x 1025 g

14.
63Cu is 69% of the naturally occurring isotope of Cu.  If only one other isotope is present for natural copper, what is it?
a)
59Cu
b)
65Cu
c)
61Cu
d)
62Cu
15.

What is the limiting reactant if 10 moles of NH3 react with 30.0 moles of NO?

4NH3+ 6NO --> 5N2 + 6H2O

a)

NH3

b)

NO

c)

N2

d)

water

16.

Balance this equation:


____ Zn + _____HCl → _____ ZnCl2 + _______H2

a)

1,2,1,2

b)

2,1,1,2

c)

1,2,1,1

d)

1,3,1,2

17.

____ Zn + _____HCl → _____ ZnCl2 + _______H2


If 70.50 g of Zn and 71.65 g of HCl are combined, what is the limiting reactant?

a)

Zn limits

b)

HCl limits

c)

ZnCl2 limits

d)

H2 limits

18.

____ Zn + _____HCl → _____ ZnCl2 + _______H2


If 70.50 g of Zn and 71.65 g of HCl are combined, what is the maximum mass of zinc chloride that can be produced?

a)

133.9 g ZnCl2

b)

131.8 g ZnCl2

c)

146.9 g ZnCl2

d)

267.83 g ZnCl2

19.

____ Zn + _____HCl → _____ ZnCl2 + _______H2


If the reaction is done in a lab and 125.6 g of zinc chloride are produced, what is the percent yield?

a)

85.50%

b)

93.80%

c)

95.29%

d)

46.90%

20.

____ Zn + _____HCl → _____ ZnCl2 + _______H2


If 70.50 g of Zn and 71.65 g of HCl are combined, how many moles of the excess reactant are left over?

a)

0.3251 mol H2

b)

0.9826 mol Zn

c)

1.078 mol Zn

d)

0.095 mol Zn

21.

Balance this equation:


_____HCl + ____ Mg → _____ MgCl2 + _______H2

a)

2,1,1,1

b)

2,2,1,1

c)

2,4,1,2

d)

1,2,1,3

22.

_____HCl + ____ Mg → _____ MgCl2 + _______H2

If 69.75 g of Mg and 70.25 g of HCl are combined, what is the limiting reactant?

a)

HCl limits

b)

Mg limits

c)

MgCl2 limits

d)

H2 limits

23.

_____HCl + ____ Mg → _____ MgCl2 + _______H2

If 69.75 g of Mg and 70.25 g of HCl are combined, what is the maximum mass of magnesium chloride that can be produced?

a)

273.2 g MgCl2

b)

91.72 g MgCl2

c)

183.4 g MgCl2

d)

136.6 g MgCl2

24.

_____HCl + ____ Mg → _____ MgCl2 + _______H2

If the reaction is done in a lab and 84.6 g of magnesium chloride is produced, what is the percent yield?

a)

30.97%

b)

46.13%

c)

92.24%

d)

61.93%

25.

_____HCl + ____ Mg → _____ MgCl2 + _______H2

If 69.75 g of Mg and 70.25 g of HCl are combined, how many moles of the excess reactant are left over?

a)

2.869 mol Mg

b)

1.906 mol Mg

c)

0.9634 mol HCl

d)

1.927 mol HCl

26.

Identify the type of chemical reaction

a)

Synthesis

b)

Decomposition

c)

Single replacement

d)

Double replacement

e)

Combustion

27.

Identify the type of chemical reaction

a)

Synthesis

b)

Decomposition

c)

Single replacement

d)

Double replacement

e)

Combustion

28.

Identify the type of chemical reaction

a)

Synthesis

b)

Decomposition

c)

Single replacement

d)

Double replacement

e)

Combustion

29.

Identify the type of chemical reaction

a)

Synthesis

b)

Decomposition

c)

Single replacement

d)

Double replacement

e)

Combustion

30.

Identify the type of chemical reaction

a)

Synthesis

b)

Decomposition

c)

Single replacement

d)

Double replacement

e)

Combustion

31.

Identify the type of chemical reaction

a)

Synthesis

b)

Decomposition

c)

Single replacement

d)

Double replacement

e)

Combustion

32.

Identify the type of chemical reaction

a)

Synthesis

b)

Decomposition

c)

Single replacement

d)

Double replacement

e)

Combustion

33.

Identify the type of chemical reaction

a)

Synthesis

b)

Decomposition

c)

Single replacement

d)

Double replacement

e)

Combustion

34.

Identify the type of chemical reaction

a)

Synthesis

b)

Decomposition

c)

Single replacement

d)

Double replacement

e)

Combustion

35.
What are the products of this reaction?
Cu+ AgNO3--> 
a)
Cu(NO3)2+Ag
b)
CuNO3 + Ag
c)
CuAg+NO3
d)
Cu+ AgNO3
36.
Write a Balanced Equation for this reaction:
C2H4 + 2 O2 -->
a)
C2O2 + H4
b)
CO2 + HOH
c)
CO + H
d)
2 CO2 + 2H2O
37.
Predict the products for the this reaction:
K + HCl --> 
a)
KCl + H2
b)
KHCl 
c)
KH + Cl2
d)
KCl + H
38.
Which of the following equations represents the balanced synthesis reaction of iron (III) and oxygen?
a)
Fe + 3 O2 → Fe2O3
b)
3 Fe + 3 O2 → 2 Fe2O3
c)
2 Fe + O2 → Fe2O3
d)
4 Fe + 3 O2 → 2 Fe2O3
39.
What are the correct formulas and coefficients for the products of the following single-replacement reaction?
Mg + Al(OH)3 →
a)
No Reaction
b)
Al + Mg(OH)3
c)
2 Al + 3 Mg(OH)2
d)
3 Al + MgOH3
40.
If an element is diatomic it should have a subscript of___
a)
2, always
b)
2, only when it is by itself
c)
it shouldn't have a subscript, it should have a coefficent
41.
What is the product when rubidium and oxygen gas react?
a)
RbO2
b)
Rb2O
c)
RbO
d)
Rb2O2
42.
in a reaction, aqueous barium chloride reacts with aqueous potassium carbonate to produce solid barium carbonate and aqueous potassium chloride. what is the correct balanced equation.
a)
Ba2Cl(aq) + KCO3(aq) --> BaCO3(s) + KCl(aq)
b)
BaCl2(aq) + K2CO3(aq) --> BaCO3(s) + 2KCl(aq)
c)
BaCl(aq) + K2CO3(aq) --> BaCO3(s) + K2Cl(aq)
d)
Ba2Cl2(aq) + KCO3(aq) --> Ba2CO3(s) + KCl2(aq)
43.
When balancing equations a ____ can be placed to the left of a formula of a substance to make the equations balanced
a)
charge
b)
subscript
c)
random number
d)
coefficient
44.

Based on the activity series, what are the predicted products of this reaction?

Pt (s) + H2O (l) →

a)

No Reaction will occur

b)

PtO + H

c)

PtO + H2

d)

Pt2O + H2

45.

Based on the activity series, what are the predicted products of this reaction?

Br2 (l) + KI (aq) →

a)

KBr + I2

b)

KBr + I

c)

KBr2 + I

d)

No Reaction

46.

Based on the activity series, will this reaction occur?

Au (s) + HCl (l) →

a)

AuCl + H

b)

No Reaction

c)

AuCl + H2

d)

Au2Cl + H2

47.
A mixture contains cobalt metal, copper metal, and tin metal. This mixture is mixed with nickel nitrate. Which metals, if any, will react? 
a)
Cobalt only
b)
Copper only
c)
Tin only
d)
All 3
48.

Predict the product(s) of this reaction (don't worry about balancing):

Mg + HCl →

a)

No Reaction

b)

MgCl2 + H2

c)

MgCl2 + H

d)

MgCl + H2

49.

Which of the following is the products of the equation?


MgSO4 + NaCl =>

a)

MgCl2(s) + Na2SO4(aq)

b)

MgCl2(aq) + Na2SO4(s)

c)

No Reaction

d)

MgCl(aq) + NaSO4(s)

50.

Predict the products of the following equation.

PbCl2+ AgNO3 =>

a)

AgCl(s) + Pb(NO3)2(aq)

b)

No Reaction

c)

AgCl(aq) + Pb(NO3)2(s)

d)

AgCl(s) + PbNO3(aq)

51.

Predict the products of the following reaction.


H2SO4 + BaCl2 =>

a)

BaSO4(s) + HCl(aq)

b)

BaSO4(aq) + HCl(s)

c)

No Reaction

d)

ClSO4(aq) + BaH(s)

52.

Predict the products of the following equation.

2 NaI + MgSO4 →

a)

MgI2(aq) + Na2SO4(s)

b)

MgI2(s) + Na2SO4(aq)

c)

No Reaction

d)

MgI2(s) + Na2SO4(s)

53.

Predict the products:

NaOH + Fe(NO3)3 →

a)

NaFe(s) + OH(NO3)3(aq)

b)

NaNO3(s) + Fe(OH)3(s)

c)

No reaction

d)

NaNO3(aq) + Fe(OH)3(s)

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