HOW MANY GRAMS OF NH3 CAN BE PRODUCED FROM 15.0 G H2

Answer 1

H2 : NH3
= 2*1.008 : 14.007+3*1.008
= 2.016 : 17.031

So if H2 weighs 15 g, let x=NH3 produced,
cross multiply to get
mass of NH3 = 15*17.031/2.016=?

Answer 2

126.72