Free Printable Unit 3 Review

Worksheets

Unit 3 Review

Total questions: 16

Worksheet time: 1hrs 10mins

Name

Class

Date

2Na + 2H₂O → 2NaOH+ H₂
How many grams of hydrogen are produced if 120 g of Na are available?

5.2 g

2.6 g

690 g

45 g

2Al + 6HCl --> 2AlCl₃ + 3H₂

Aluminium reacts with hydrochloric acid. How many grams of aluminum are necessary to produce 11 L of hydrogen gas at STP?

8.8

0.99

1.0

How many liters of N₂, at STP, will react with 53.0 g H₂ to form ammonia?

N₂ + 3H₂ --> 2NH₃

396 L

17.6 L

196 L

588 L

2 NaClO₃ (s) --> 2NaCl (s) +3 O₂ (g)
12.00 moles of NaClO₃ will produce how many grams of O₂?

256 g of O₂

576 g of O₂

288 g O₂

What is the percent yield of the following reaction if 145g of P₂O₅reacts with 40 grams of water, but you only collected 112 grams of phosphoric acid? 3 H₂O + P₂O₅->2H₃PO₄

80%

85%

77%

58%

Balance this equation
_Zn+_HCl-->_ZnCl₂+_H₂

1,1,2,1

1,1,1,2

1,2,1,1

2,1,1,1

Balance this equation-
__P₄+ __O₂--> __P₂O₃

it is already balanced

2, 1, 3

1, 2, 3

1, 3, 2

What is the percent composition of Benzene, C₆H₆?

C = 50%
H = 50%

C = 85.7 %
H = 14.3%

C = 92.2%
H = 7.8%

C = 71.9%
H = 28.1%

What percentage of the total atomic mass of carbon monoxide (CO) is composed of oxygen?

29%

43%

57%

73%

10.

CH₄ + 2O₂ → CO₂ + 2H₂O
24 grams of CH₄ was added to the above reaction. Calculate the theoretical yield of CO₂.

66 grams

132 grams

33 grams

8.72

11.

The ______________ yield is the maximum amount of product possible in a reaction. This determines the amount of product that should be produced in a perfect setting

Percent

actual

stoichiometry

theoretical

12.

When reacting Na with Cl₂, we calculated that the theoretical yield should be 13 grams. Our actual yield was 12.5 grams. What is the percent yield?

90.4%

104%

96.15%

1.04%

13.

11.

LiOH + KCl → LiCl + KOH

b) I actually produced 6 grams of lithium chloride and I began this reaction with 20.0 grams of lithium hydroxide. What is my percent yield?

16.9%

5.91%

1.88%

12.3%

14.

Identify the following chemical reaction.

Pb + FeSO₄ ----> PbSO₄ + Fe

Synthesis (or combination)

Decomposition

Single displacement

Double displacement

15.

What reaction has the following general formula:

AB --> A + B

Synthesis

Decomposition

Single Replacement

Double Replacement

Combustion

16.

What type of chemical reaction is this one?

Al(OH)₃ --> Al2O3 + H2O

Decomposition

Combustion

Synthesis

Single Replacement

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Unit 3 Review

Total questions: 16

Worksheet time: 1hrs 10mins

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