Question

find the number of atoms in 28u N2 gas

Answer 1

Answer:

Explanation:

1. 28 u represents the molecular mass of N2gas.

Now, 1 mole of a gas contains 6.022 x 1023molecules.

Volume occupied by 1 mole(6.022 x 1023  molecules) of N2 gas at STP = 22.4 L

 Volume occupied by 1 molecule of N2 gas at STP = 22.4 L/6.022 x1023

 = 3.72 x 10-23 L

2. 28 g represent molar mass of N2 gas

Now,

Volume occupied by 1 mole of N2 gas at STP = 22.4 L

Answer 2

Answer:

By Avagadro's law, 1 Nitrogen mole or 28 g of Nitrogen contains 6.023 x 10^23 no. of molecules. Nitrogen, being a diatomic element, the no. of atoms = 2 x 6.023 x 10^23 atoms.