Respuesta :

Answer:

4.59 grams of hydrogen

Explanation:

57.010 g of ammonium phosphate * 1 mol / 149 g of ammonium phosphate * 12.0 g H * / 1 mol = 4.591409396.

But with sig figs, it rounds to 4.59.

So the final answer is 4.59 grams of hydrogen.