Free Printable Mole-Mass Conversions

Worksheets

Name

Class

Date

Why do we need to be able to convert amounts of chemicals from moles to grams or grams to moles?

Because we need to use moles when we discuss chemical reactions, but we need to measure in grams

Because we need to obey the law of Conservation of Mass

Because we need to use grams when we discuss chemical reactions, but we need to measure in moles

All of these are true

Which of the following do we use to convert between moles and grams?

Avagadro's number

Molar mass

Atomic number

None of these

Which of the the following describes how to convert 10.0 g H2O to moles?

$10.0 g \times \frac{1 8 . 0 1 5 g}{1 m o l}$

$10.0\ g\ \times\ \frac{1\ g\ }{18.015\ mol}$

$1\ mol\ x\ \frac{18.015\ g}{10.0\ g}$

$10.0\ g\ x\ \frac{1\ mol}{18.015\ g}$

How many moles are there in 500.0 g of table salt (NaCl)?

8.56 mol NaCl

0.117 mol NaCl

29,222 mol NaCl

3.09 mol NaCI

How many grams is 0.750 mol of CuSO₄?

.004699 g CuSO₄

119.7 g CuSO₄

212.8 g CuSO₄

83.7 g CuSO₄

How many moles is 25.0 g Ag₂CO₃?

11.0 mol Ag₂CO₃

6,894 mol Ag₂CO₃

0.0907 mol Ag₂CO₃

0.149 mol Ag₂CO₃

How many grams is 0.117 mol Mg₃(PO₄)₂?

30.8 g Mg₃(PO₄)₂

27.1 g Mg₃(PO₄)₂

23.4 g Mg₃(PO₄)₂

42.1 g Mg₃(PO₄)₂

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