Question

calculate the number of particles in 8g of nitrogen molecule

Answer 1

1 gm-mole of nitrogen is 28 grams. Therefore  8gms of nitrogen is 8/28 gm-mole 

As per Avogardo's Law number of atoms in 1 mole of any substance = 6 x 10 to the power -23.

Therefore no of atoms in 8gms of nitrogen = 6 x 0.25 x 10 to the power -23