1. Got Mole Problems?

2. Mole Unit Conversions Standards: 1 mole = Molar Mass
1 mole = 6.02 x1023 molecules
1 mole = 22.4 L of gas
1 molecule = __ atoms

3. MOLE
Number of Molecules
Mass (g)
Volume of a GAS (L)
Atoms in a M.C.
1 mole = 6.02 x 1023 molecules
1 m.c. = # atoms in formula
1 mole = Molar Mass g
1 mole = 22.4 L

4. Grams to Moles
1.) Calculate the number of moles in grams of ammonium dichromate (NH4)2Cr2O7

5. Moles to Grams
2.) What is the mass of a mole sample of ethanol C2H5OH?

6. Molecules to Moles
3.) How many moles are present in a sample that contains 4.10 x molecules of sodium chloride, NaCl?

7. Moles to Molecules
4.) How many molecules are in 6.65 moles of sodium iodide, NaI?

8. Molecules to Atoms
5.)If you have 2.50 x 1023 magnesium chloride molecules, MgCl2, how many total atoms are present? 6.)How many chlorine atoms are present?

9. Multi-step Problem
7.) Calculate the number of molecules in grams of H2O.

10. Multi-step Problem
8.) How many (total) atoms are present in moles of NaOH?

11. Multi-Step Problem
9.) What is the mass of 2.56 x 1025 atoms of copper?

12. Multi-Step Problems
10.) What is the number of moles in grams of aluminum sulfate, Al2(SO4 )3?