A sample of nitrogen gas reacts with an excess of hydrogen gas to give an actual yield of 23.5 g NH3. The theoretical yield is 26 g. What is the percent yield for this reaction?
Reaction: N2(g) + 3 H2(g)
→ 2 NH3(g)

Aroom with dimensions 7.00m×8.00m×2.50m is to be filled with pure oxygen at 22.0∘c and 1.00 atm. the molar mass of oxygen is 32.0 g/mol. how many moles noxygen of oxygen are required to fill the room? what is the mass moxygen of this oxygen?