Free Printable Mole and Percent Composition Quiz

1.

What is the value of Avogadro’s number?

a)

$6.02 \times 10^5$

b)

$6.02 \times 10^{23}$

c)

$1.00 \times 10^{12}$

d)

$3.14 \times 10^8$

2.

How many moles are present in $18$ grams of water ( $H_2O$ )? (Molar mass of $H_2O = 18$ g/mol)

a)

$0.5$ moles

b)

$1$ mole

c)

$2$ moles

d)

$18$ moles

3.

Which of the following represents the correct relationship between moles, mass, and molar mass?

a)

$\text{Moles} = \frac{\text{Mass}}{\text{Molar Mass}}$

b)

$\text{Moles} = \text{Mass} \times \text{Molar Mass}$

c)

$\text{Moles} = \frac{\text{Molar Mass}}{\text{Mass}}$

d)

$\text{Moles} = \text{Mass} + \text{Molar Mass}$

4.

What is the percent composition of oxygen in $H_2O$ ? (Molar mass of $H_2O = 18$ g/mol, Oxygen = $16$ g/mol)

a)

$11.1\%$

b)

$44.4\%$

c)

$88.9\%$

d)

$16\%$

5.

If you have $2$ moles of sodium chloride ( $NaCl$ ), how many formula units do you have?

a)

$1.20 \times 10^{23}$

b)

$6.02 \times 10^{23}$

c)

$1.20 \times 10^{24}$

d)

$3.01 \times 10^{23}$

6.

Calculate the number of molecules in $9$ grams of water ( $H_2O$ ). (Molar mass of $H_2O = 18$ g/mol)

a)

$3.01 \times 10^{23}$

b)

$6.02 \times 10^{23}$

c)

$1.50 \times 10^{24}$

d)

$9.03 \times 10^{22}$

7.

A sample contains $4.5 \times 10^{24}$ atoms of carbon. How many moles of carbon are present?

a)

$7.5$ moles

b)

$0.75$ moles

c)

$4.5$ moles

d)

$6.02$ moles

8.

What is the mass of $0.5$ moles of calcium chloride ( $CaCl_2$ )? (Molar mass of $CaCl_2 = 111$ g/mol)

a)

$55.5$ g

b)

$111$ g

c)

$222$ g

d)

$0.5$ g

9.

A student has $36$ grams of glucose ( $C_6H_{12}O_6$ ). Calculate the number of molecules present. (Molar mass of $C_6H_{12}O_6 = 180$ g/mol)

a)

$1.20 \times 10^{23}$

b)

$6.02 \times 10^{23}$

c)

$2.01 \times 10^{23}$

d)

$1.20 \times 10^{24}$

10.

A compound contains $40$ grams of calcium ( $Ca$ ) and $60$ grams of chlorine ( $Cl$ ). Calculate the percent composition of calcium in the compound.

a)

$40\%$

b)

$60\%$

c)

$50\%$

d)

$80\%$

11.

Convert 50 grams of CH $_4$ to moles.

a)

3.11 moles

b)

1.56 moles

c)

2.08 moles

d)

0.78 moles

Mole and Percent Composition Quiz

Total questions: 11

Worksheet time: 6mins

Similar Resources on Wayground