Question

How many moles of helium atoms are in 38.00 g of helium gas?

Answer 1

`9.5*mol`

Explanation:

The molar mass of helium is `4.00*g`.

`"Moles of substance"` `=` `"Mass of substance"/"Molar mass of substance"`

`(38.00*cancelg)/(4.00*cancelg*mol^-1)` `=` `??mol`