Free Printable Moles

Worksheets

Moles

Total questions: 24

Worksheet time: 3hrs 45mins

Name

Class

Date

In chemistry, a "mole" is:

The mass of an atom

a large number used to count particles

based on the volume of a substance

How many potatoes are in one dozen potatoes?

6.02 x 10²³

How many atoms of iodine are in a mole of iodine?

63.55g

126.9

6.02 x 10²³

The number 6.02 x 10²³ is called...

Betty's number

Bohr's number

Fred's number

Avogadro's number

We use the atomic mass from the periodic table to calculate...

mass

molar mass

moles

What is the molar mass of NaCl?

58.45g/mol

28g/mol

12g/mol

6.02 x 10²³

What is the molar mass of C₂H₄O₂?

40 g/mol

50 g/mol

60 g/mol

68 g/mol

What would be the mass of 1.5mol H₂O

20 g of H₂O

27 g of H₂O

32 g of H₂O

40 g of H₂O

What is the mass of 0.75 moles of (NH₄)₃PO₄?

101.75 g

121.75 g

111.75 g

131.75 g

10.

If I need 20.4 moles of sodium chloride, how many grams do I need?

0.549 g

112 g

1192 g

5077 g

11.

How many molecules would be in 8.4 moles of Octane (C₈H₁₈)?

5.77 x 10²³ molecules

5.04 x 10²⁴molecules

5.77 x 10²⁶molecules

5.04 x 10²³molecules

12.

Which has more molecules?

1 mole H₂O

1 mole Al(OH)₃

1 mole NaCl

They are all the same

13.

What is Avogadro's Number?

6.02 x 10²³

- 60. 2 10²³

6.02 x 10^-23

6,020,000,000,000

14.

How many moles are in 4.5x10²⁴ Silver atoms?

5.23 moles of Ag

7.48 moles of Ag

2.71 moles of Ag

8.52 moles of Ag

15.

What is the molar mass of Mg₃N₂?

191.6 g/mol

76.64 g/mol

38.32 g/mol

100.95 g/mol

16.

Mass of one mole of CO₂

40 g

44 g

32 g

28 g

17.

What is the Law of Conservation of mass?

Mass is created in a chemical reaction

Mass is created in a physical change

New chemicals formed from a chemical reaction have a larger overall mass than the original reactants

Mass is never created or destroyed

18.

What is the charge of this element

-1

19.

How many PROTONS does nitrogen have if it has the following charge: N^3- ?

20.

_______ are atoms with the same number of protons but varying numbers of neutrons.

ions

elements

allotropes

isotopes

21.

Which of these elements has the highest molar mass?

Hydrogen

Iron

Carbonate

Cobalt

22.

You have 2 moles of graphite (KC₈) in your pencil. How many grams of graphite are in your pencil?

135.19 g

270.37 g

67.59 g

134 g

23.

How many moles are there in 12.7g of CaCO₃?

0.20 mol

1,000.76 mol

6.14 mol

0.13 mol

24.

Calculate the number of atoms in 0.0340 g Zn.

5.20 x 10^-4 atoms Zn

3.13 x 10²³ atoms Zn

3.13 x 10²⁰ atoms Zn

2.05 x 10²² atoms Zn

Reset

Moles

Total questions: 24

Worksheet time: 3hrs 45mins

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