2.    How many moles of O are in 8.25 g of O?

3.    How much does 2.18 mol of Cu weigh?

4.    What is the mass of 0.28 mol of iron?

5.    How many atoms are in 7.2 mol of chlorine?

6.    How many atoms are in 36 g of bromine?

7.    How many moles are in 1.0 x 10⁹ atoms?

8.    What is the mass of 1.20 x 10²⁵ atoms of sulfur?

9.    How many moles of CO molecules are in 52 g of CO?

10.    How many moles of C₂H₆ are in 124 g?

11.    How many moles of CCl₄ are there in 56 g?

12.    How much does 2.50 mol of H₂SO₄ weigh?

13.    How much does 0.25 mol of Fe₂O₃ weigh?

14.    How many molecules are there in 52 g of CO?

15.    How many formula units are in 22.4 g SnO₂?

16.    How many molecules are in 116 g CCl₄?

17.    What is the mass of 3.01 x 10²³ formula units of Fe₂O₃?

18.    What is the mass of 1.2 x 10²⁵ molecules of CO?

19.    How many O atoms are in 1.25 mol of SO₂?

20.    How many moles of O atoms do you have when you have 1.20 x 10²⁵ N₂O₅ molecules?

21.    How many formula units are in 5.33 mol of CuCl₂?

22.    How many copper atoms are in 5.33 mol of CuCl₂?

23.    How many moles of Cl atoms are in 5.33 mol of CuCl₂?

24.    How many moles of CuCl₂ contain 1.2 x 10²³ atoms of Cl?

25.    How many O atoms are in 3.15 mol of SnO₂?

26.    How many H atoms are in 17.5 g (NH₄)₂C₂O₄?
 

Answers
1.    1.8 mol Na
2.    0.516 mol O
3.    139 g Cu
4.    16 g Fe
5.    4.3 x 10²⁴ Cl atoms
6.    2.7 x 10²³ Br atoms
7.    1.7 x 10^-15 mol
8.    639 g S
9.    1.9 mol
10.    4.12 mol
11.    0.36 mol
12.    245 g
13.    40. g
14.    1.1 x 10²⁴ molecules
15.    8.95 x 10²² formula units
16.    4.54 x 10²³ molecules
17.    79.9 g Fe₂O₃
18.    5.6 x 10² g CO
19.    1.51 x 10²⁴ O atoms
20.    99.7 mol O
21.    3.21 x 10²⁴ formula units
22.    3.21 x 10²⁴ Cu atoms
23.    10.7 mol of Cl atoms
24.    0.10 mol CuCl₂
25.    3.79 x 10²⁴ O atoms
26.    6.79 x 10²³ H atoms