Need help with this Chemistry question! Show your work

Question

Hydrogen and oxygen react with each other according to the equation 2H2(g) + O2(g) —> 2H2O(g)

If 5.00 mol of O2 react with an unlimited amount of hydrogen, what amount (in moles) of h2o will be produced?

Answer 1

Well from the equation for each mole of oxygen reacting we get 2 moles of water

So if we react 5 moles of oxygen, we get 5 x 2 = 10 moles of water (assuming an unlimited amount of hydrogen)