__PRACTICE WITH MOLE CONVERSIONS__

Solve the following
problems.

1. How many moles are
equal to 2.548 grams of boron trifluoride, BF_{3}?

2. How many grams are
there in 2.45 x 10^{24} molecules of ammonia, NH_{3}?

3. How many moles are
equal to 5.29 x 10^{23} atoms of carbon?

4. What is the mass (in
grams) of 6.759 moles of sodium chloride, NaCl?

5. How many molecules of H_{3}PO_{4}
are contained in 0.257 moles of H_{3}PO_{4}?

6. How many atoms of
copper are equal to 49.5 grams of copper?

7. What is the mass (in
grams) of 7.14 x 10^{23} molecules of C_{6}H_{12}O_{6}?

8. How many moles are
equal to 8.392 x 10^{23} atoms of uranium?

9. What is the mass (in
grams) of 5.685 moles of sodium bicarbonate, NaHCO_{3}?

10. How many molecules are
equal to 0.027 moles of calcium carbonate, CaCO_{3}?

11. How many moles are
equal to 93.75 grams of sodium sulfate, Na_{2}SO_{4}?

12. How many molecules are
equal to 103.74 grams of lead nitrate, Pb(NO_{3})_{2}?

*13. A large piece of
aluminum foil has a mass of 35.25 grams. What mass of pure

tin would contain the same number
of atoms as the aluminum foil?

1.) 0.03758 moles 2.) 69.2 grams 3.)
0.878 moles

4.) 395.4 grams 5.)
1.55 x 10^{23} molecules 6.) 4.69 x
10^{23} atoms

7.) 213 grams 8.)
1.394 moles 9.) 477.5
grams

10.) 1.6 x 10^{22} molecules 11.) 0.6602 moles 12.) 1.8862 x 10^{23}
molecules

*13.) 155.0 grams