Free Printable Molar Conversions

Worksheets

Molar Conversions

Total questions: 25

Worksheet time: 25mins

Name

Class

Date

How many grams of NaOH do you have to dissolve to make 725 mL of a 2.5 M solution?

48.4 g

18.2 g

72.5 g

31.9 g

How many moles are in 72.9 g of HCl?

2.00 moles

1.34 moles

2.97 moles

6.02 x 10²³

How many grams are in 3.01 × 10²⁴ molecules of (NH₄)₂SO₄? (Molar Mass (NH₄)₂SO₄ = 132.17 g/mol

330.28 g

496.81 g

660.85 g

872.16 g

If Keyarye used 3.92 moles of baking soda (NaHCO₃) for her volcano experiment, how many grams of baking soda (NaHCO₃) did she use? You **must show ALL your work**(calculations) to receive credit. NO CREDIT WITHOUT WRITING OUT CALCULATIONS Include the correct units for full credit. (Lose 0.75pts per question for missing/incorrect units) ***HINT*** - watch video walkthrough of study guide in Google Classroom for examples

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88 grams of H₂O (18 g/mol) is how many moles?

4.88 moles

.54 moles

6.67 moles

Convert 50.0 grams of H₂O to moles of H₂O.

901 moles

18.02 moles

2.77 moles

Match the following...

You convert moles to grams by...

multiplying by the molar mass

You convert liters to moles by...

dividing by 22.4L

You convert moles to particles by...

multiplying my avagadro's constant

You convert grams to moles by...

dividing by the molar mass

You convert moles to liters by...

multiplying by 22.4L

What mass of calcium chlorate, Ca(ClO₃)₂, is equivalent to 0.750 moles of the substance?

155.24 grams

206.98 grams

128.65 grams

What is the molar mass of calcium carbonate ( $CaCO_3$ )?

100 g/mol

102 g/mol

104 g/mol

106 g/mol

10.

What is the molar mass of sodium chloride ( $NaCl$ )?

58.44 g/mol

60.44 g/mol

62.44 g/mol

64.44 g/mol

11.

How many moles are in 250 grams of copper(II) sulfate ( $CuSO_4$ )? (Molar mass of $CuSO_4$ = 160 g/mol)

1.25 moles

1.50 moles

1.75 moles

2.00 moles

12.

What is the molar mass of water ( $H_2O$ )?

16 g/mol

18 g/mol

20 g/mol

22 g/mol

13.

Calculate the number of moles in 88 grams of carbon dioxide ( $CO_2$ ). (Molar mass of $CO_2$ = 44 g/mol)

1 mole

2 moles

3 moles

4 moles

14.

If you have 3 moles of sodium chloride (NaCl), how many formula units do you have?

$1.81 \times 10^{24}$ units

$6.02 \times 10^{23}$ units

$18.06 \times 10^{23}$ units

$9.03 \times 10^{23}$ units

15.

What is the molar mass of Ba(OH)₂?

153.49 g/mol

201.97 g/mol

56.24 g/mol

16.

How many atoms are in 2 moles of helium (He)?

$6.02 \times 10^{23}$ atoms

$12.04 \times 10^{23}$ atoms

$3.01 \times 10^{23}$ atoms

$24.08 \times 10^{23}$ atoms

17.

How much would 3 moles of CO₂equal?

132

404

18.

Which of the following is the mass in grams of 4.25 x 10^3 mol of N2?

2.35 x 10^-4 g

1.52 x 10^2 g

5.95 x 10^4 g

1.19 x 10^5 g

19.

How many grams of water (H $_2$ O) are in 2 moles?

18 g

36 g

72 g

144 g

20.

moles of sodium sulfate, Na₂SO₄, are added to a solution. What mass of the substance was this?

297.65 grams

142.05 grams

355.13 grams

21.

What is the molar mass of Mg? Include the correct units for full credit.

Example** (For Xe, the molar mass is 131.29 g/mol Xe)

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22.

What is the molar mass of sulfuric acid (H2SO4)?

98.08 g/mol

100.10 g/mol

102.12 g/mol

104.14 g/mol

23.

How many moles are in 180 grams of glucose (C6H12O6)? (Molar mass of C6H12O6 = 180 g/mol)

1 mole

2 moles

0.5 moles

3 moles

24.

If you have 2 moles of carbon dioxide (CO2), how many molecules do you have?

1.20 x 10^24 molecules

6.02 x 10^23 molecules

3.01 x 10^23 molecules

2.40 x 10^24 molecules

25.

Convert 44 grams of carbon dioxide (CO2) to moles. (Molar mass of CO2 = 44 g/mol)

1 mole

2 moles

0.5 moles

3 moles

100 %

Molar Conversions

Total questions: 25

Worksheet time: 25mins

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