Mole Practice Problems
Name__________________________
Period______Date________________
DIRECTIONS: Show all your work in solving the following. Box your final answer with a unit and the
correct number of significant digits.
1. Find the mass of 0.89 mol of calcium chloride.
2. A bottle of lead (II) sulfate contains 158.1 g of the compound. How many moles of the substance
are in the bottle?
3. Find the mass of 1.112 mol of hydrogen fluoride.
4. Determine the number of moles of C5H12 that are in 362.8 g of the compound.
5. Find the mass of 0.159 mol silicon dioxide.
6. You are given 12.35 g of C4H8O2. How many moles of the compound do you have?
7. Find the mass of 3.66 mol of nitrogen gas.
1) 99 g 2) 0.5213 mol 3) 22.24 g 4) 5.039 mol 5) 9.56 g 6) 0.1403 mol 7) 102 g
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8. A bottle of potassium permanganate contains 66.38 g of the compound. How many moles does it
contain?
9. Determine the number of atoms that are in 0.58 mol of selenium.
10. How many moles of barium nitrate contain 6.8 x 1024 formula units?
11. Determine the number of atoms that are in 1.25 mol of oxygen gas.
12. How many moles of magnesium bromide contain 5.38 x 1024 formula units?
13. Determine the number of formula units that are in 0.668 mol of silver nitrate.
14. How many moles of ethane, C2H6, contain 8.46 x 1024 molecules?
15. Determine the number of formula units that are in 1.48 mol of sodium fluoride.
8) 0.4201 mol 9) 3.5 x 1023 atoms 10) 11 mol 11) 1.51 x 1024 atoms 12) 8.94 mol 13) 4.02 x 1023 fu 14) 14.1 mol 15) 8.91 x 1023 fu
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16. How many formula units are in 3.5 g of sodium hydroxide?
17. If you burned 6.10 x 1024 molecules of ethane, C2H6, what mass of ethane did you burn?
18. How many formula units are in 5.1 g of titanium (IV) oxide?
19. What is the mass of 3.62 x 1024 molecules of methanol, CH3OH?
20. How many formula units are in 1.4 g of lead (II) chloride?
21. Determine the mass of 9.24 x 1024 molecules of decane, C10H22.
22. How many molecules are in 5.6 g of H2S?
16) 5.3 x 1022 fu 17) 304 g 18) 3.8 x 1022 fu 19) 192 g 20) 3.0 x 1021 fu 21) 2180g 22) 9.9 x 1022 molec
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23. A container with a volume of 893 L contains how many moles of air at STP?
24. A chemical reaction produces 0.37 g of nitrogen gas. What volume will that gas occupy at STP?
25. A canister contains 31.0 moles of oxygen gas. What volume will that gas occupy at STP?
26. A chemical reaction produces 7.02 L of carbon dioxide gas at STP. What mass of carbon dioxide
gas was produced?
27. A tube with a volume of 3.68 L contains how many moles of neon gas at STP?
28. A chemical reaction produces 0.750 L of hydrosulfuric acid in the gaseous state at STP. What
mass of gas is produced?
29. A container holds 4.51 moles of argon gas. What is the volume of this container at STP?
30. 12.1 g of dry ice (solid carbon dioxide) is converted to a gas. What volume will that gas occupy
at STP?
23) 39.9 mol 24) 0.30 L 25) 694 L 26) 13.8 g 27) 0.164 mol 28) 1.14 g 29) 101 L 30) 6.16 L
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