What is the largest amount of H2O in grams that can be formed when 6.10 g of H2 reacts with 6.10 g of O2, based on

Question

2 H2 + O2 = 2 H2O

Answer 1

each mole of O2 requires 2 moles of H2.
How many moles of each reagent do you have?

For example, if you have 3 moles of H2 and 7 moles of O2, then the H2 will use 3/2 moles of O2, leaving extra O2 unused.

If you have 7 moles of H2 and 3 moles of O2, then all the O2 will be consumed by 6 moles of H2, leaving unused H2.

each mole of O2 produces 2 moles of H2O.