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Worksheets

Grams, Moles and Atoms

Total questions: 10

Worksheet time: 50mins

Name
Class
Date
1.

How many molecules of AlCl3 are in 9.44 moles of AlCl3?

a)

5.68 molecules

b)

5.68x1024 molecules

c)

0.705 molecules

d)

1.25x1023 molecules

2.

How many grams are in 11.9 moles of chromium?

a)

0.229g

b)

4.37g

c)

52.0g

d)

619g

3.

How many moles are in 15.0 g of lithium?

a)

104 mol

b)

2.16 mol

c)

6.94 mol

d)

15.0 mol

4.
Find the molar mass of:
Pb(NO3)
a)
241 g/mol
b)
207 g/mol
c)
301 g/mol
d)
331 g/mol
5.

How many moles are in 9.8 grams of calcium?

a)

0.24 moles

b)

4.1 moles

c)

1.0 mole

d)

390 moles

6.

How many molecules are there in 5.9 moles of NaCl?

a)

3.5x1024 molecules

b)

9.80x10-24 molecules

c)

1.02x1023 molecules

d)

6.02x1023 molecules

7.

How many moles are present in 32.3 grams of carbon dioxide (CO2)?

a)

44.0 moles

b)

1420 moles

c)

32.3 moles

d)

0.734 moles

8.

How many molecules are in 150.0g if Na2SO4?

a)

9.03x1025 molecules

b)

1.056 molecules

c)

6.357x1023 molecules

d)

5.701x1023 molecules

9.

You have two sealed flasks. The first flask contains 22.99 grams of solid sodium (Na). The second flask contains 200.59 grams of liquid mercury (Hg). Which flask has more moles of the indicated substance?

a)

The first flask

b)

The second flask

c)

Neither.

10.

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

a)

135.19 g

b)

270.37 g

c)

67.59 g

d)

134 g