Free Printable Chemical Quantities (Mole)

Worksheets

Chemical Quantities (Mole)

Total questions: 25

Worksheet time: 2hrs 48mins

Name

Class

Date

What is the SI unit for a count of atoms?

meter

mass

molecule

mole

How many hydrogen atoms are in the compound: (NH₄)₂CO₃

What is the formula mass of CO₂?

44 grams

44 amu

0.44 grams

2.6 x 10²⁵atoms

What is the percent composition of nitrogen in NH₃?

25%

14%

28%

82%

Which of the following is an empirical formula?

C₃H₃

Li₂CO₃

Na₂O₂

C₆H₁₂O₆

How many moles are contained in 45 grams of aluminum?

27 mol

1215 mol

1.7 mol

57 mol

How many moles of chlorine gas are contained in 45 grams of pure sample?

35 mol

0.64 mol

1.3 mol

2.6 mol

How many atoms of are contained in a mole of sodium?

6.02 x 10²³ atoms

11 atoms

23 atoms

2 atoms

If the empirical formulas is CH and the molar mass is 78g/mol, what is the molecular formula?

C₆H₆

C₅H₁₈

6CH

10.

1 mol = 6.02 x 10²³ _______

particles

grams

liters

Kelvin

11.

1 mol of gas at STP will occupy ___ of space.

6.02 L

22.4 L

10.23 L

12.01 L

12.

The molar mass of a substance can be found by...

adding up the masses listed on the periodic table

dividing by Avogadro's number

multiplying by 22.4

multiplying by Avogadro's number

13.

How many moles are present if there are 8.88 x 10²³ particles?

1.48 mol

2.99 mol

0.71 mol

36.5 mol

14.

How many particles are in 5.2 mol of Ag?

3.1 x 10²⁴

2.7 x 10²³

1.8 x 10²⁴

7.9 x 10²³

15.

What is the molar mass of NaNO₂?

70.00 g/mol

50.00 g/mol

60.00 g/mol

80.00 g/mol

16.

How many grams does 2.50 mol of K weigh?

97.8 g

67.3 g

25.0 g

34.1 g

17.

How many molecules are in a 10.0 L container of CO₂ (g) at STP?

2.69 x 10²³ molecules

5.87 x 10²³ molecules

6.12 x 10²³ molecules

3.47 x 10²³ molecules

18.

How many grams does 1.25 x 10²³ molecules of SF₆ weigh?

30.3 g

125 g

0.478 g

98.4 g

19.

A substance is found to be 40.2% Li and 59.8% P. Determine its empirical formula.

LiP

Li₃P

Li₂P₃

LiP₂

20.

A substance contains 40.8 g of C and 54.4 g of O. Determine its empirical formula.

CO₂

C₂O

CO₃

21.

A chemical has a molar mass of 90.08 g/mol and its empirical formula is CH₂O. Determine its molecular formula.

CH₂O

C₂H₄O₂

C₃H₆O₃

C₄H₈O₄

22.

Avogadro's number is...

6.02 x 10²³

6.78 x 10²²

6.13 x 10²⁴

6.04 x 10²¹

23.

What is the molar mass of sodium hydroxide (NaOH)?

20 g

30 g

40 g

45 g

24.

How many atoms is 1.67 mol of CO2?

10.1 x 10²³atoms of CO2

30.2 x 10²³ atoms of CO2

0.28 x 10²³ atoms of CO2

20.0 X 10²³ atoms of CO2

25.

How many moles is 16.4 grams of hydrogen peroxide (H2O2)?

278.8 mol H2O2

0.96 mol H2O2

557.6 mol H2O2

0.48 mol H2O2

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Chemical Quantities (Mole)

Total questions: 25

Worksheet time: 2hrs 48mins

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