1)how many grams of cr are in 58.5g of K2Cr2O7 2) if 7.

1)how many grams of cr are in 58.5g of K2Cr2O72) if 7.o moles of sulfur atoms and 10 moles of oxygen molecules are combined to form the maximum amount of sulfur trioxide, how many moles of which reactant remain unused at the end? 3S + 3O2 = 2SO3 3) 2ZnS + 3O2 = 2ZnO + 2SO2 how many moles of Zno are produces when 32 gms of oxygen is allowed to react with an excess of ZnS?