Moles and Molecules

1
Moles and Molecules
2
Formula Mass

• Sum of the average atomic masses of all the atoms
  represented in a formula
• Measured in amu
• What is the formula mass of KClO3?

3
Molar Mass

• How many grams of a substance there are per mole
  of that substance
• Numerically equal to the formula mass
• Units are g/mole
• What is the molar mass of water?

4
Mole Problems

• How many grams are in 2.8 mole of MgCl2?
• How many grams in 3.0 mole of NaCl?
• How many grams in .10 mole of carbon dioxide?

5
Mole Problems

• How many moles in 125g of BeS?
• How many moles in 450 g of CaCO3?
• How many moles in 33.4 g of O2?

6
Mole Problems

• How many molecules in .58 mole of CaCl2?
• How many molecules in 3.0 mole of water?

7
Mole Problems

• How many moles is 1.35x1024 molecules of water?
• How many moles is 5.6x 1023 molecules of HCl?