Question

The mass of $112{cm}^3$ of $N{H}_3$ gas at STP is:

• A. $0.085g$
• B. $0.850g$
• C. $8.500g$
• D. $80.500g$

Answer 1

The correct option is A $0.085g$

$\text{no. of moles}=\frac{112\times {10}^{-3}}{22.4}=0.005moles$

$Mass=0.005\times 17=0.085gm$

Option A is correct.