Question

What is the mass of one mole of `(NH_2)_3PO_4`?

Answer 1

Of `"ammonium phosphate, "149.09*g*mol^-1`

Explanation:

The salt you have written would not be isolable from water. `"Ammonium phosphate"` is `(NH_4)_3PO_4`

`"Ammonium biphosphate "(NH_4)_2HPO_4` is commonly used as an agricultural fertilizer.