Question

Find the ratio by mass of the combining elements in ammonia :

• A. $N{H}_3$ : $14:3$
• B. $N{H}_3$ : $3:14$
• C. $N{H}_4$ : $14:3$
• D. $N{H}_4$ : $7:3$

Answer 1

The correct option is A $N{H}_3$ : $14:3$

The chemical formula of ammonia is $N{H}_3$. Atomic mass of nitrogen is $14$ and of hydrogen is $1\times 3=3units$.

$N:H\times 3$
$14:1\times 3$
$14:3$

Hence the correct option is A.