Question

How many moles of he are in 16 g of the element??

Answer 1

By using the formula Moles = Mass/ molar mass we can apply this.

We have 16g of helium and the molar mass of He is 4.002 Amu.

Mole = 16g/4.002Amu  
Mole = 3.998 mol
Mole = 4.00 mol

There are 6.02 x 10^23 molecules in a mol so there are 4 times of 6.02 x 10^23 molecules of helium. Quite a lot huh! :)

Answer 2

Answer:

4.0 mol

The other person should of stopped there they started making up steps XD