1. Or If I just substitute dozen for mole, this will all seem easier! Part I: One Step Problems

2. So… If you easily work in dozens for doughnuts and eggs, are we going to work with dozens for atoms and molecules? Why or why not? Should we measure the mass of an atom in grams? Why or why not?

3. Mole & particles conversion 1 mole of atoms = 6.02 x 10 23 atoms 1 mole of molecules = 6.02 x 10 23 molecules Does it matter what the material is when you convert from moles to particles? 1 mole of Fe = 55.85 g 1 mole NaCl = 58.45 g Why is the mass of a mole different for each substance? What is a molar mass? Mole & mass conversion

4. Mole to particle conversion If you have 2.3 moles of sucrose how many molecules of sucrose do you have? If you have 1.5 x 10 24 atoms of aluminum, how many moles of aluminum do you have? Particle to Mole conversion

5. Mole to mass conversion If you have 2.3 moles of iron atoms how many grams of iron do you have? If you have 175 g of NaCl how many moles of NaCl do you have? Mass to mole conversion

6. MassMOLES X molar mass X 6.02 * 10 23 ÷ 6.02 * 10 23 ÷ molar mass Particles An aluminum can has a mass of about 15 g. How many moles of aluminum are in the can?

7. You have 407 g of calcium chloride. How many moles of calcium chloride do you have? You have 1.5 x 10 22 atoms of helium. How many moles of helium do you have?

8. You have 407 g of calcium chloride. How many moles of calcium chloride do you have? CaCl2 Mol Mass = 111 g/mol Ans: You have 3.67 moles of CaCl2 You have 1.5 x 10 22 atoms of helium. How many moles of helium do you have? Ans: You have 0.025 moles of He Did you need the molar mass? Why or why not?