1. Lightning flashes in the atmosphere cause nitrogen and oxygen to combine to form nitrogen dioxide. How many grams of nitrogen would be required to produce 25 grams of nitrogen dioxide this way ?
2. Calcium oxide can be prepared by heating calcium carbonate. How much calcium carbonate would be required to produce 15 grams of calcium oxide this way?
CaCO3 -----> CaO + CO2
3. Permanent hard water contains calium sulfate and can be soften by the addition of sodium carbonate. What amount of sodium carbonate would have to be added to react with 1 gram of calcium sulfate?
4.If 75 grams of potassium hydroxide acid are permitted to react with 50 grams of hydrochloric acid, how much potassium chloride will be formed?
5. How many grams of carbon dioxide can be produced from the reaction of 100 grams of sulfuric acid with 100 grams of calcium carbonate ?
6..Lead will react with hydrochloric acid
to produce lead (ll ) chloride and hydrogen.
How many moles of hydrochloric acid are
needed to completely react with 0.36 mol
of lead?
7. .How many moles of HNO3 will be
produced when 0.51 mol of N2O5 reacts
according to the following equation ?
N2O5 +H2O -----> 2HNO3
8. Carbon will react with zinc oxide to
produce zinc and carbon dioxide. How
many moles of carbon dioxide will be
produced if 0.38 mol of ZnO is completely
reacted ?
9. How many moles of NaBr will be
produced when 0.69 mol of bromine reacts
according to the following equation ?
Br2 + 2NaI 2NaBr + I2
10. Phosphorus will react with bromine to
produce phosphorus tribromide. How
many moles of phosphorus tribromide will
be produced if 0.78 mol of bromine is
reacted?