How do you find the atomic mass number of phosphate?

1 Answer
BRIAN M.
Jun 29, 2016

PO_4^-3 = 94.93amu

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 = 94.93amu

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