Question: How many moles of Hydrogen are in 2 H2O?

Answer: 4 moles

Explanation:

To determine the number of moles of Hydrogen (H) in 2 molecules of water (H2O), we need to consider the molecular formula of water and Avogadro's number.

Each water molecule consists of two Hydrogen atoms (H) and one Oxygen atom (O). Therefore, 1 molecule of H2O contains 2 moles of H.

Given that we have 2 molecules of H2O, we can calculate the total moles of H as follows:

Number of moles of H in 2 H2O = 2 molecules of H2O * (2 moles of H / 1 molecule of H2O)

Number of moles of H in 2 H2O = 4 moles of H

Therefore, there are 4 moles of Hydrogen in 2 molecules of H2O.