Question

Which of the following oxides of nitrogen have 30.5% nitrogen by weight?

• A. NO
• B. $N{O}_2$
• C. $N_2{O}_4$
• D. $N_2{O}_5$

Answer 1

Answer: (B), (C)

$N_2{O}_4$

Percentage of nitrogen in $N{O}_2$$=\frac{14}{46}\times 100=30.5$%
Percentage of nitrogen in $N_2{O}_4$$=\frac{28}{92}\times 100=30$.5%