Here's how to figure out the number of hydrogen atoms in 3H₂SO₄:

* Identify the subscript: The subscript for hydrogen (H) is 2, meaning there are two hydrogen atoms per molecule of H₂SO₄.

* Multiply by the coefficient: The coefficient 3 indicates that we have three molecules of H₂SO₄.

* Calculate the total: (2 hydrogen atoms/molecule) * (3 molecules) = 6 hydrogen atoms

Therefore, there are 6 hydrogen atoms present in 3H₂SO₄.