Question

What is a formula mass example?

Answer 1

`"Sodium carbonate"` has a formula mass of `105.99*g*mol^-1`. How do we arrive at this figure?

Explanation:

Well we take the weighted sum of the atomic masses involved in the formula, `Na_2CO_3`, and that is..........

`{2xx22.99(Na)+12.011(C)+3xx16.00(O)}*g*mol^-1`

`=105.99*g*mol^-1`.

From where did I get the individual atomic masses? Did I just know them off the top of my head?

Is this what you want? You may want to clarify......