percentage composition

Question

What is the percentage of nitrogen by mass in ammonium nitrate (NH₄NO₃)?

RankGuru · Accepted Answer

1. **Calculate Molar Mass of $NH_4NO_3$**:
   - $N 	imes 2 = 28$
   - $H 	imes 4 = 4$
   - $O 	imes 3 = 48$
   - Total Molar Mass $= 28 + 4 + 48 = 80 	ext{ g/mol}$.
2. **Calculate Mass Percent of Nitrogen**:
   - $\% N = \frac{	ext{Total mass of N (2 atoms)}}{	ext{Total Molar Mass}} 	imes 100$
   - $\% N = \frac{28}{80} 	imes 100 = 35\%$.

Rank Guru

percentage composition

Select the correct option: