Homework #3 week two semester two

1. 6 moles of NH₃ are needed to react with h9 mol PbO
1. 5 moles N₂ are produced by the reaction of 9 mol NH₃
2. 5 moles Pb are produced from 5 mol PbO
2. 34 moles max can be produced from 34.0 g NH₃
1. 621g Pb
2. 62 g max N₂
3. 2 PbO ( 446.4)g
3. Because oxygen is a diatomic molecule (two atoms of O) the mass is 32 g not 16g and therefore 73 % of oxygen atoms make up CO₂
4. 87% of Ag is in Ag₂S
1. 53% of Al  is in Al₂O₃
2. 40% of Ca is in CaCO₃
5. 68% of Pb is in PbSO₄
6. 10% of PbSO₄  is in the ore
7. 57% of Pb is in the entire ore



10% of PbSO4 is in the ore



68% of Pb is in PbSO4