Question

How do you find the atomic mass number of phosphate?

Answer 1

`PO_4^-3 = 94.93`amu

Explanation:

Phosphate is a polyatomic ion with a formula of `PO_4^-3`

This molecule has one atom of Phosphorus and 4 atoms of Oxygen.

`P - 1*30.97 = 30.97`
`O - 4*15.99 = 63.96`

`30.97 + 63.96 = 94.93`

`PO_4^-3 = 94.93`amu