1. Stoichiometry pg. 81

2. Mole to mass start with given use mole to mole conversions to get to moles use molar mass to convert to mass Determine the mass of sodium chloride produced when 1.25 moles of chlorine gas reacts with sodium.

3. Mass to mass used when we are carrying out a reaction in the lab start with given use molar mass to convert to moles use mole to mole ratio to convert to moles of the other substance use molar mass to get the mass of the new substance Ammonium nitrate (NH 4 NO 3 ), an important fertilizer, produces N 2 O gas and H 2 O when it decomposes. Determine the mass of water produced from the decomposition of 25.0 g of solid ammonium nitrate.

4. Practice If you begin with 1.25 mole of TiO 2, what mass of Cl 2 is needed? TiO 2 + C +2Cl 2  TiCl 4 +CO 2 One in a series of reactions that inflate air bags in automobiles is the decomposition of sodium azide. Determine the mass of N 2 produced if 100.0 g NaN 3 is decomposed. 2NaN 3  2Na + 3 N 2