At STP, 14 g of nitrogen occupies 11.2 litres. Use this information to determine the atomicity of nitrogen. It is given that molar volume of nitrogen at STP is 22.4 L.

Explanation

Solution. Number of moles of nitrogen `=("volume of nitrogen at STP")/("Molar volume of nitrogen at STP")`
`=(11.2L)/(22.4L)=(1)/(2)`
Mass of half mole of nitrogen = 14 g =
Atomic mass of nitrogen `=("Molar mass of nitrogen")/("Atomicity of nitrogen")=(28g)/(14g)=2`