How to Calculate the Number of Moles of Phosphoric Acid

31 Oct 2021

How many moles of phosphoric acid are there in 658 x 10^28 formula units of phosphoric acid, H3PO4?

Answer: 109.3 × 10^5 mol

To calculate the number of moles of phosphoric acid in 658 x 10^28 formula units of H3PO4, you can use Avogadro's number.

Given data:

Number of formula units = 658 x 10^28

Formula of phosphoric acid = H3PO4

Explanation:

The Avogadro number is 6.022 × 10^23, which represents the number of particles (atoms, molecules, ions, etc.) in one mole of a substance.

From the given data, we have:

658 x 10^28 formula units

To calculate the number of moles, we use the formula:

Number of moles = Number of formula units / Avogadro number

Substitute the values into the formula:

658 x 10^28 formula units x 1 mole / 6.022 x 10^23 formula units = 109.3 x 10^5 mol

Therefore, there are 109.3 x 10^5 moles of phosphoric acid in 658 x 10^28 formula units of H3PO4.