Question: how to calculate the percentage of nitrogen in ammonium nitrate?
Answer: 2×14g=28g. The mass of N is 28g . Percent composition of N is 28g80g×100%=35% .
4×1g=4g. The mass of H is 4g . Percent composition of H is 4g80g×100%=5% .
3×16g=48g. The mass of O is 48g . Percent composition of O is 48g80g×100%=60% .