1.  Stoichiometry Calculations

2. Mole to Mole Calculations  Aluminium bromide can be made by reacting aluminum foil with liquid bromine. How many moles of bromine are needed to make 5 moles of aluminum bromide?  How many moles of oxygen gas are needed to react with 13.9 mol of C 2 H 6 ?

3. Molecule to Molecule Calculations  Sulfur reacts with oxygen to make sulfur trioxide gas. Assuming excess sulfur, how many molecules of sulfur trioxide would be made from 1.33 x 10 5 molecules of oxygen gas?

4. Mass to Mass Calculations  Photosynthesis. How many grams of oxygen can be made from 1.00 x 10 3 g of carbon dioxide?  Sodium aside, NaN 3, decomposes to inflate an air bag in a car. What mass of NaN 3 is needed to produce 80.0g of nitrogen gas?