Question

If the mass of one mole of hydrogen is 1.01 grams; phosphorus, 30.97 grams; and oxygen, 16.0 grams, what is the molar mass of phosphoric acid (H3PO4)? 50.0 grams 66.0 grams 82.0 grams 98.0 grams

Answer 1

Molar mass of H3PO4 = 1.01*3 + 30.97 + 16*4
= 3.03 + 30.97 + 64 = 98 grams