What is the total number of moles of H2SO4 needed to prepare 5.0 liters of a 2.0 M solution of H2SO4

The molarity of H2SO4 is the number of moles in 1 L of solution.

The molarity is 2.0 mol/L

This means that there should be 2 moles in a 1 L solution to make up this molarity.

In this case we need to make up a 5 L solutions with that molarity. Then the amount of moles required are - 2 mol/L x 5 L = 10 mol