1. Identify the subscript for Hydrogen (H):

* The formula for sulfuric acid (H₂SO₄) shows that there are 2 hydrogen atoms in each molecule.

2. Multiply the subscript by the number of moles of the compound:

* You have 0.75 moles of H₂SO₄.

* 2 (atoms of H per molecule) * 0.75 (moles of H₂SO₄) = 1.5 moles of H

Therefore, there are 1.5 moles of H in 0.75 moles of H₂SO₄.