Question

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

• A. $NO$
• B. $N_{2}O$
• C. $N_2{O}_4$
• D. $N_2{O}_5$

Answer 1

The correct option is C $N_2{O}_4$

Percentage of nitrogen in $NO$$=\frac{14}{30}\times 100=46.6$%
Percentage of nitrogen in $N_{2}O$$=\frac{28}{44}\times 100=63.63$%
Percentage of nitrogen in $N_2{O}_4$$=\frac{28}{92}\times 100=30$.5%
Percentage of nitrogen in $N_2{O}_5$$=\frac{28}{108}\times 100=25.92$%