Question

Calculate the numbers of moles in 12g of helium

Answer 1

Answer:

3 moles is answer

Explanation:

1 mole of he weighs 4 gms

as helium is an inert gas it's atomic weight can be considered as weight of 1 mole of gas

hence

1mole----------4gm

3mole----------x

x =3 *4

12

Answer 2

Answer:

1 mole of helium=2g

12 mole=?

Explanation:

1×x= 2×12

x=2×12

x=24