Free Printable Review: The Mole

1.

How many significant figure(s) are in the following 303.0 grams amount?

a)

1

b)

3

c)

4

d)

0

2.

Calculate $3.5\ mol$ times $6.02\ x\ 10^{23}\ \frac{particles}{mol}$ and answer in the correct number of significant figures.

a)

$2\ x\ 10^{23}particles$

b)

$2.1\ x\ 10^{24}particles$

c)

$2.11\ x\ 10^{23}particles$

d)

$2.107\ x\ 10^{23}particles$

3.

What is the volume of one mole of any gas at STP (Standard Temperature & Pressure)?

a)

22.4L

b)

0.00 L

c)

1.00 L

d)

44.8 L

4.

What is the number of atom of 1.008g/mol of hydrogen?

a)

$1.08\ x10^{23}atoms$

b)

$2.44\ x\ 10^{24}atoms$

c)

$6.02\ x\ 10^{23}atoms$

d)

$1.20\ x\ 10^{24}atoms$

5.

Is the an empirical of molecukar formula?

a)

Empirical Formula

b)

Molecular Formula

6.

What is the empirical formula for this molecule?

a)

$CH$

b)

$CH_2$

c)

$CH_4$

d)

$C_2H_4$

7.

Write the molecular formula for disulfur decoxide.

a)

$SO_5$

b)

$S_{10}O_2$

c)

$S_2O_{10}$

d)

$S_2O_5$

8.

What is the molar mass of $CH_2O$ ?

a)

29.018 g/mol

b)

58.038 g/mol

c)

30.026 g/mol

d)

60.052 g/mol

9.

What is the percent composition of carbon?

a)

20%

b)

38%

c)

40%

d)

54%

10.

What is the percent composition of hydrogen?

a)

3.35%

b)

6.71%

c)

13.4%

d)

26.9 %

11.

What is the percent composition of oxygen?

a)

26.6%

b)

33.2%

c)

53.3%

d)

64.8%

12.

What is the molar mass of the following molecule?

a)

342.297 g/mol

b)

427.871 g/mol

c)

125.378 g/mol

d)

331.345 g/mol

13.

What is the percent composition of carbon?

a)

12.0%

b)

22.0%

c)

42.1%

d)

48.6%

14.

What is the percent composition of hydrogen?

a)

1.08%

b)

4.08%

c)

6.48%

d)

7.20%

15.

What is the percent composition of oxygen?

a)

51.4%

b)

46.70%

c)

33.8%

d)

26.9%

16.

Calculate the number of moles in $3.34\ x\ 10^{23}$ atoms of copper?

a)

0.555 mol of copper

b)

1.11 mol of copper

c)

$2.01\ x\ 10^{47}$ mol of copper

d)

$1.01\ x10^{47}$ mol of copper

17.

What is the volume of $1.806\ x\ 10^{24}$ atoms of helium (He) gas?

a)

2.993 L

b)

5.987 L

c)

32.93 L

d)

67.05 L

18.

What is the mass of $1.204\ x10^{24}molecules$ of water $H_2O$ ?

a)

9.008 g

b)

12.22 g

c)

18.02 g

d)

36.04 g

19.

What is the molar mass of sodium hydroxide NaOH?

a)

22.990 g/mol

b)

23.998 g/mol

c)

39.997 g/mol

d)

49.996 g/mol

20.

How many moles are there in 259.9805 g/mol of sodium hydroxide (NaOH)?

a)

2.25 mol

b)

4.77 mol

c)

6.50 mol

d)

13.0 mol

Review: The Mole

Total questions: 20

Worksheet time: 28mins

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