Question

2) Calculate the no of moles for 8g of He-​

Answer 1

Answer:

The molar mass of the He is $4.0$g/mol. So, the mole of He in eight gram is ${\text{2}}$. According to the Avogadro number, Helium is a monatomic, so, the number of atoms in the He element is one.

Answer 2

Answer:

no. of moles of he - 8x1 = 8 moles