Question

Calculate number of atoms in 52 g of helium ??

Answer 1

Hi there!

The molar mass that is the mass of 6.022 × $10^{23}$ atoms of helium is 4g. 

Hence 1 mole of He = 4 g of He = 6.022 × $10^{23}$ atoms of  He

1 g of He = (6.022 × $10^{23}$ ) / 4 atoms of  He

52 g of He = (6.022 × $10^{23}$ × 52 ) / 4 atoms of  He

= 7.829 × $10^{24}$ atoms of Helium [ He ]

Hope it helps! :D

Cheers,
Ishaan Singh