Question

2 H2(g) + O2 (g) --> 2 H20 (1)

How many moles of hydrogen gas do you need to make 2 moles of liquid water?

Answer 1

4moles of hydrogen atoms

Step-by-step explanation:

The second conversion factor reflects the number of atoms contained within each molecule. Two water molecules contain 4 hydrogen atoms and 2 oxygen atoms. A mole of water molecules contains 2 moles of hydrogen atoms and 1 mole of oxygen atoms.