Question

Question #6de44

Answer 1

see below

Explanation:

Molar mass of `He` = `4` `g*mol^-1`

So, `6.022*10^23` atoms of `He` = `4` `g`

So, `0.54` `g` of `He` = `(6.022*10^23*0.54)/(4)` = `8.1297*10^22` atoms