Question

How is molar mass of an element used to convert from number of mass in grams?

Answer 1

`"Number of moles"` `=` `"Mass (g)"/("Molar mass "("g"*"mol"^-1)`

Explanation:

The given quotient is certainly sound dimensionally, in that `g/(g*mol^-1)` reduces to `1/(mol^-1)` `=` `mol`.

And thus a `12*g` mass of carbon `-=(12*g)/(12*g*mol^-1)=1*mol.`

Are you happy with this?

If you are how many moles does a `32*g` mass of elemental oxygen, and a `71*g` mass of elemental chlorine represent?