1. Moles practice Q’s
Ch 10 Pearson

2. What is the mass of 2.50 moles of FeS?
220. g
35.2 g
.0284 g

3. How many moles of Fe is 3.3 × 1015 atoms of Fe?
1.8 x 1015 mol
9.2 x 107 mol
5.5 x 10-9 mol

4. True or False
Representative particles can be atoms, molecules, or ions present in a substance.

5. How many atoms in 2 moles of hydrogen?
6.022 x 1023 atoms
1.204 x 1024 atoms
3.011 x 1023 atoms

6. What is the density of CO2, a gas, at STP?
985.8 g/L
44.01 g/L
1.965 g/L

7. True or False
The mole is the SI unit that measures the amount of a substance.

8. How many moles are in 6.00 grams of F2?
2.28 x 1025 mol

9. What is the molar mass of methane, CH4?
16.06 g/mol
Not enough information
6.022 x 1023

10. Please make your selection
What is Avogadro’s number?
6.022 x 1023 atoms
12.01 atoms
3.011 x 1023 atoms
22.4 L

11. True or False
The molar mass of a substance is found by adding together the masses of each element in the substance from the Periodic Table.

12. What is the volume of 32.0 grams of O2 at STP?