Question

Laughing Gas, N2O, is made by the careful decomposition of ammonium nitrate

NH4NO3 (s) = N20 (g) + 2H20 (g)

How many grams of N2O can you obtain?

How many dm3 of stream would also be produced?

Answer 1

Not interested in the name of your high school. It is important that you say chemistry though so you do not get a cranky old physicist looking at your question.
There is no way to tell how much comes out without knowing how much went in.