Question

Mass of 11.2 L of NH3 gas at STP is
A. 0.5 g
B. 4.5 g
C. 6.75 g
D. 8.5 g​

Answer 1

Its answer is d) 8.5 gm.

As, 1 Mole of NH3 at STP occupies volume of 22.4 l

I Mole of NH3 weighs = Molar mass =17g

So 17g of NH3 = 22.4l

Let X g   of NH3 = 11.2l

Therefore, X = (11.2 x17)/(22.4)

=8.5g