Molar Mass of H3PO4

How to work out the molar mass of H3PO4

1. Count the atoms of each element in H3PO4: 3 H, 1 P and 4 O.
2. Multiply each count by the element's atomic weight: 3 × 1.008 = 3.024; 1 × 30.974 = 30.974; 4 × 15.999 = 63.996.
3. Add the results: 3.024 + 30.974 + 63.996 = 97.994 g/mol.

Frequently asked questions

What is the molar mass of H3PO4?

The molar mass of phosphoric acid (H3PO4) is 97.994 g/mol, so one mole of it weighs 97.994 grams.

How many moles are in 100 grams of H3PO4?

100 g ÷ 97.994 g/mol = 1.020 mol.

Which element makes up most of the mass of H3PO4?

O, at 65.31% of the mass.