Free Printable ADVANCED CHEM REVIEW 2

1.

If you rewrite the following word equation as a balanced chemical equation, what will be the coefficient and symbol for fluorine?

nitrogen trifluoride → nitrogen + fluorine

a)

3F

b)

6F₂

c)

F₃

d)

3F₂

2.

When the equation, Fe + Cl₂ → FeCl₃, is balanced, what is the coefficient for Cl₂?

a)

1

b)

2

c)

3

d)

4

3.

When potassium hydroxide and barium chloride react, potassium chloride and barium hydroxide

are formed. The balanced equation for this reaction is _________.

a)

KH + BaCl →KCl + BaH

b)

KOH + BaCl → KCl + BaOH

c)

2KOH + BaCl₂ →2KCl + Ba(OH)₂

d)

KOH + BaCl₂ →K + BaOH

4.

Hydrochloric acid, HF, cannot be stored in glass containers because it reacts with the silicates in glass. The relevant reaction is

Na₂SiO₃ + 8 HF → H₂SiF₆+ 2 NaF + 3 H₂O

Molar masses (g/mol): Na₂SiO₃ = 122; HF = 20; H₂SiF₆= 144; NaF = 42; H₂O =18

How many moles of HF are required to dissolve 0.500 mol Na₂SiO₃?

a)

1.00 mol HF

b)

2.00 mol HF

c)

4.00 mol HF

d)

8.00 mol HF

5.

Hydrochloric acid, HF, cannot be stored in glass containers because it reacts with the silicates in glass. The relevant reaction is

Na₂SiO₃ + 8 HF → H₂SiF₆+ 2 NaF + 3 H₂O

Molar masses (g/mol): Na₂SiO₃ = 122; HF = 20; H₂SiF₆= 144; NaF = 42; H₂O =18

How many grams of Na2SiO3 can be dissolved by 0.500 mol HF?

a)

3.8 g

b)

7.6 g

c)

11.5g

d)

30.5 g

6.

How many moles of oxygen does it take to react completely with 1.48 mol of aluminum? 4 Al + 3O₂ → 2Al₂O₃

a)

1.11. mol O2

b)

1.13 mol O2

c)

1.14 mol O2

d)

A. 1.15 mol O₂

7.

How many grams of Na₂SO₄ are produced by reaction of 124 g of NaOH with sufficient H₂SO₄?

2 NaOH + H₂SO₄→ Na₂SO₄ + 2 H₂O

Molar masses(g/mol): NaOH = 40; H₂SO₄ = 98; Na₂SO₄ = 142; H₂O= 18

a)

118 g Na₂SO₄

b)

119 Na₂SO₄

c)

220 Na₂SO₄

d)

221Na₂SO₄

8.

Consider the following reaction:

2ZnS + 3O₂ → 2 ZnO + 2SO₂

In a certain experiment, 97.5 grams of zinc sulfide undergoes this reaction with 32 grams of oxygen gas. Molar Masses(g/mol): ZnS = 97; ZnO = 81; O₂=32; SO₂=64

What is the limiting reagent?

a)

ZnS

b)

O₂

c)

ZnO

d)

SO₂

9.

In the reaction below, 6.8 g carbon monoxide gas was made to react with 7.2 g of hydrogen gas. The reaction produced 5.2 g of methanol.

2 H₂ + CO → CH₃OH

Molar masses(g/mol): H₂= 2; CO =28; CH₃OH=32

What is the theoretical yield?

a)

57.6 g

b)

50.04 g

c)

7.8 g

d)

6.8 g

10.

If in the reaction CH4 + 2O₂ → CO₂ + 2H₂O, 2.50 g of CO₂ are isolated and the theoretical yield is

2.71 g CO₂, what is the percent yield of the reaction?

a)

90.3%

b)

91.3%

c)

92.3%

d)

94.3%

ADVANCED CHEM REVIEW 2

Total questions: 10

Worksheet time: 57mins

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