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Worksheets

Molar Conversion Pracitce

Total questions: 13

Worksheet time: 2hrs 49mins

Name
Class
Date
1.

5.11 x 1023 atoms of lithium (Li) is equal to how many moles?

a)

1.18 moles

b)

0.351 moles

c)

1.34 moles

d)

0.849 moles

2.

0.75 mole of copper (Cu) is equal to how many atoms?

a)

8.03 x 1023 atoms

b)

6.02 x 1023 atoms

c)

4.51 x 1023 atoms

d)

3.11 x 1023 atoms

3.

Find the mass in grams of 2.25 x 1024 atoms of calcium (Ca).

a)

40.0 grams

b)

255.1 grams

c)

150 grams

d)

9.02 x 1024 grams

4.
How many molecules are in 32.4 grams of phosphorous pentoxide?
a)
1.76 x 1023 molecules
b)
0.29 moles
c)
1.76 x 1022 molecules
d)
0.29 molecules
5.
How many moles of copper (II) chlorate contain 1.45x1021 formula units?
a)
8.73x1044
b)
1.20x1024
c)
0.00241
d)
1.45
6.

What is the mass of 1.2 x 1024 atoms of C?

a)

2.0 grams

b)

24 grams

c)

0.17 grams

d)

1.4 x 1025 grams

7.

Determine the mass of 4.20 moles of C6H12

a)

353 g

b)

0.0499 g

c)

337 g

d)

2.53 x 1024 g

8.

How many grams of carbon monoxide are in 1.2 x 1024 molecules of CO?

a)

28 grams

b)

56 grams

c)

6.02 grams

d)

1.2 grams

9.

How many particles are in 13.5 grams of Beryllium?

a)

1.5 particles

b)

9 particles

c)

4x1023 particles

d)

9x1023 particles

10.

How many molecules of CH₄ are in 48.2 g of this compound?

a)

5.00 x 10²⁴

b)

3.00

c)

2.90 x 10²⁵

d)

1.81 x 10²⁴

11.

How many grams of KCl would be dissolved in 5.50 L of a 0.250 M solution of KCl? *molar mass of KCl = 74.55 g/mol*

a)

1.48 g

b)

103 g

c)

1640 g

d)

3.39 g

12.
What is the molarity of a solution which contains 22.41 grams of NaCl in 50.0 mL of solution?
a)
0.488 M
b)
7.67 mol
c)
7.67 M
d)
0.00767 M
13.

How many grams of CuSO₄ should you weigh out if you want to make up 2.00 L of 0.200 M solution?

(a)