Suppose you had 1 mole of oxygen (O2). How many moles of hydrogen (H2) would react completely with the oxygen, and how many moles of H2O would b produced? Show the balance equation with explanations.

First, we write an equation for the reaction of Hydrogen and Oxygen to produce water:

H₂ + O₂ ⇒ H₂O

This equation is not balanced, we then balance the Oxygens:

H₂ + O₂ ⇒ 2H₂O

And now the Hydrogens:

2H₂ + O₂ ⇒ 2H₂O

Therefore, if one mole of Oxygen reacts, it will require two moles of Hydrogen and produce two moles of water.