Question

What is calcium nitrate's atomic mass?

Answer 1

The formula mass of `Ca(NO_3)_2` is `164.09*g*mol^-1`.

Explanation:

So how did we get that mass?

Well, in each formula units of `"calcium nitrate"` there is one atom of calcium, 2 atoms of nitrogen, and 6 atoms of oxygen. If I take the atomic masses (from where?) and sum them appropriately:

`"Formula mass of calcium nitrate"`

`=(40.1+2xx14.01+6xx15.999)*g*mol^-1`

`=??*g*mol^-1`. Sum them up and waddya get?

Do you have to remember these numbers?