1. The fertilizer ammonium sulfate is prepared by the reaction between ammonia and sullfuric acid:

2NH3(g) + H2SO4(aq) -> (NH4)2SO4

a. What is the molar mass of NH3?

b. What is the molar mass of (NH4)2SO4?

c. What is the mole-mole ratio of NH3 to (NH4)2SO4?

d. How many moles of ammonium sulfate is produced when 638.4 g of NH3 reacts completely with H2SO4?

e. How many grams of NH3 is needed to produce 50.0 g of (NH4)2SO4?