1) What is the molar mass of a substance that is 22.3% N bymass and one molecule contains 2 nitrogen atoms?
2) What is the molar mass of a ficticious element X if 97.6 gof X are required to react with 16.3 g of O2 to produceX2O?
3) What volume of H2 could be produced at atemperature of 13 oC and a pressure of 760 torr by thereaction of 2.01 g of aluminum with hydrochloric acid?
4) What is the percent yield in a reaction between 55.0 gO2 and 31.4 g Al if 53.8 g ofAl2O3 is produced?