1. Convert the following to moles. Show your WORK! A. 60.0 grams of NaOH
B. 2.73 grams of NH4 Cl
C. 5.70 grams of ZrF4
D. 10.0 grams of PbO2

2. Convert the following to grams. Show your WORK!
A. 0.100 moles of CO2
B. 0.437 moles of NaOH
C. 0.500 moles of (NH4 )2`1CO3
D. 3.00 moles of ZnCl2

3. How many molecules are present in the following quantities? Show your WORK!
A. 0.250 mole of H2O
B. 6.00 moles of H2SO4
C. 0.00450 mole of Al2(CO3)3

4. How many moles are present in the following quantities? Show your WORK!
A. 1.00 x 1020 molecules of H2O
B. 1.00 x 1025 molecules of H2
C. 5,000,000,000,000 atoms of carbon

5. How many molecules (or atoms) are present in the following masses? Show your WORK!
A. 1.00 gram of Na2CO3
B. 8.00 grams of helium
C. 1000. grams of H2O

6. Convert the following to grams. Show your WORK!
A. 1.00 x 1023 molecules of H2
B. 1.00 x 1024 molecules of AlPO4
C. 1.00 x 1022 molecules of NaOH

7. What is the mass of a single atom of silver, Ag, in grams? Show your WORK!

8. If you had a silver bar that exactly fit inside a 100. mL graduated cylinder and filled it precisely to the 100.
mL mark, how many atoms of silver would be in the bar?
The density of silver is 10.5 g/mL. Show your WORK!

9. Determine the percent composition of the following compounds. Show Your Work!
A. BF3
B. Ca(C2H3O2)2
C. FeF3
D. CrCl3
E. (NH4)3PO4