Question

What is the mass in gram of 2.24 litre of N2 at STP?

Answer 1

we know that mass of 22.4 l N2 at STP is 28 g

thus mass of 2.24L at STP is

= 28/22.4 X 2.24

= 2.8 g

Answer 2

mass of 22.4 litre of N2 gas at STP 28 g

mass of 2.24litre of N2 gas =2.24×28÷22.4

=28/10 =2.8 g