Free Printable MP3 Chem Exam Review

1.

What is the value of Avogadro's constant?

a)

$3.01 \times 10^{23}$ mol $^{-1}$

b)

$6.02 \times 10^{23}$ mol $^{-1}$

c)

$6.02 \times 10^{22}$ mol $^{-1}$

d)

$12.04 \times 10^{23}$ mol $^{-1}$

2.

Which of the following is the correct formula for balancing the chemical equation: $\text{Al} + \text{O}_2 \rightarrow \text{Al}_2\text{O}_3$ ?

a)

$2\text{Al} + 3\text{O}_2 \rightarrow 2\text{Al}_2\text{O}_3$

b)

$4\text{Al} + 3\text{O}_2 \rightarrow 2\text{Al}_2\text{O}_3$

c)

$2\text{Al} + \text{O}_2 \rightarrow \text{Al}_2\text{O}_3$

d)

$4\text{Al} + 2\text{O}_2 \rightarrow 2\text{Al}_2\text{O}_3$

3.

What is the correct name for the ionic compound $\text{NaCl}$ ?

a)

Sodium chloride

b)

Sodium chlorate

c)

Sodium(I) chloride

d)

Sodium chlorite

4.

What is the correct name for the covalent compound $\text{CO}_2$ ?

a)

Carbon dioxide

b)

Carbon monoxide

c)

Carbon(II) oxide

d)

Carbonic acid

5.

How many molecules are in 2 moles of a substance, according to Avogadro's constant?

a)

$6.02 \times 10^{23}$ molecules

b)

$12.04 \times 10^{23}$ molecules

c)

$3.01 \times 10^{23}$ molecules

d)

$24.08 \times 10^{23}$ molecules

6.

Which of the following is the correct formula for balancing the chemical equation: $\text{H}_2 + \text{O}_2 \rightarrow \text{H}_2\text{O}$ ?

a)

$2\text{H}_2 + \text{O}_2 \rightarrow 2\text{H}_2\text{O}$

b)

$\text{H}_2 + 2\text{O}_2 \rightarrow \text{H}_2\text{O}$

c)

$\text{H}_2 + \text{O}_2 \rightarrow 2\text{H}_2\text{O}$

d)

$2\text{H}_2 + 2\text{O}_2 \rightarrow 2\text{H}_2\text{O}$

7.

What is the correct name for the ionic compound $\text{MgCl}_2$ ?

a)

Magnesium chloride

b)

Magnesium(I) chloride

c)

Magnesium chlorate

d)

Magnesium dichloride

8.

What is the correct name for the covalent compound $\text{SF}_6$ ?

a)

Sulfur hexafluoride

b)

Sulfur fluoride

c)

Sulfur(VI) fluoride

d)

Hexafluorosulfuric acid

9.

What is the purpose of balancing chemical equations?

a)

To ensure that the same number of each type of atom appears on both sides of the equation

b)

To make the equation look more complex

c)

To change the properties of the products

d)

To increase the reaction rate

10.

What is the correct formula for the ionic compound formed between sodium (Na) and sulfur (S)?

a)

$\text{NaS}$

b)

$\text{Na}_2\text{S}$

c)

$\text{NaS}_2$

d)

$\text{Na}_2\text{S}_2$

11.

What is the correct name for the covalent compound $\text{P}_4\text{O}_{10}$ ?

a)

Phosphorus oxide

b)

Phosphorus(IV) oxide

c)

Tetraphosphorus decoxide

d)

Phosphorus decioxide

12.

What is the correct name for the ionic compound $\text{CaCO}_3$ ?

a)

Calcium carbonate

b)

Calcium(I) carbonate

c)

Calcium carbide

d)

Calcium bicarbonate

13.

What is the correct name for the covalent compound $\text{N}_2\text{O}_5$ ?

a)

Nitrogen pentoxide

b)

Dinitrogen pentoxide

c)

Nitrogen(V) oxide

d)

Nitrous acid

14.

How many atoms are in 0.5 moles of a substance, according to Avogadro's constant?

a)

$3.01 \times 10^{23}$ atoms

b)

$6.02 \times 10^{23}$ atoms

c)

$1.20 \times 10^{24}$ atoms

d)

$3.01 \times 10^{22}$ atoms

15.

Which of the following is the correct formula for balancing the chemical equation: $\text{C}_3\text{H}_8 + \text{O}_2 \rightarrow \text{CO}_2 + \text{H}_2\text{O}$ ?

a)

$\text{C}_3\text{H}_8 + 5\text{O}_2 \rightarrow 3\text{CO}_2 + 4\text{H}_2\text{O}$

b)

$\text{C}_3\text{H}_8 + 3\text{O}_2 \rightarrow 3\text{CO}_2 + 4\text{H}_2\text{O}$

16.

Which of the following is the correct formula for balancing the chemical equation: $\text{N}_2 + \text{H}_2 \rightarrow \text{NH}_3$ ?

a)

$\text{N}_2 + 2\text{H}_2 \rightarrow 2\text{NH}_3$

b)

$\text{N}_2 + 3\text{H}_2 \rightarrow 2\text{NH}_3$

c)

$2\text{N}_2 + 3\text{H}_2 \rightarrow \text{NH}_3$

d)

$\text{N}_2 + 3\text{H}_2 \rightarrow \text{NH}_3$

17.

What is the correct name for the covalent compound $\text{Cl}_2\text{O}_7$ ?

a)

Chlorine heptoxide

b)

Dichlorine heptoxide

c)

Chlorine(VII) oxide

d)

Chlorine oxide

18.

How many moles are there in $1.204 \times 10^{24}$ atoms of carbon?

a)

1 mole

b)

2 moles

c)

0.5 moles

d)

4 moles

19.

A sample contains $3.01 \times 10^{23}$ molecules of CO $_2$ . How many moles of CO $_2$ does this represent?

a)

0.25 moles

b)

0.5 moles

c)

1 mole

d)

2 moles

20.

If you have 4 moles of argon gas, how many atoms of argon do you have?

a)

$2.41 \times 10^{24}$

b)

$24.08 \times 10^{23}$

c)

$6.02 \times 10^{23}$

d)

$1.20 \times 10^{24}$

21.

How many molecules are in 2.5 mol of NaCl?

a)

1.51x10²³

b)

146

c)

4.15

d)

1.51x10²⁴

22.

How many particles are in a mole?

a)

602

b)

602 million

c)

602 moles

d)

6.02 x 10²³

23.

How many molecules are there in 5.9 moles of NaCl?

a)

3.5x10²⁴molecules

b)

9.79x10^-24molecules

c)

1.02x10²³molecules

24.

If you have 3 moles of nitrogen gas (N₂), how many molecules of nitrogen do you have?

a)

$1.81 \times 10^{24}$

b)

$6.02 \times 10^{23}$

c)

$1.20 \times 10^{24}$

d)

$18.06 \times 10^{23}$

MP3 Chem Exam Review

Total questions: 24

Worksheet time: 14mins

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