PRACTICE WITH MOLE CONVERSIONS

Solve the following problems.

1. How many moles are equal to 2.548 grams of boron trifluoride, BF3?

2. How many grams are there in 2.45 x 1024 molecules of ammonia, NH3?

3. How many moles are equal to 5.29 x 1023 atoms of carbon?

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

5. How many molecules of H3PO4 are contained in 0.257 moles of H3PO4?

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 1023 molecules of C6H12O6?

8. How many moles are equal to 8.392 x 1023 atoms of uranium?

9. What is the mass (in grams) of 5.685 moles of sodium bicarbonate, NaHCO3?

10. How many molecules are equal to 0.027 moles of calcium carbonate, CaCO3?

11. How many moles are equal to 93.75 grams of sodium sulfate, Na2SO4?

12. How many molecules are equal to 103.74 grams of lead nitrate, Pb(NO3)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?

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 1.) 0.03758 moles             2.) 69.2 grams                            3.) 0.878 moles                 
4.) 395.4 grams                 5.) 1.55 x 1023 molecules               6.) 4.69 x 1023 atoms         
7.) 213 grams                    8.) 1.394 moles                           9.) 477.5 grams                
10.) 1.6 x 1022 molecules     11.) 0.6602 moles                        12.) 1.8862 x 1023 molecules       
*13.) 155.0 grams