Which conversion factor should be used to solve the following problem? How many moles of water (H2O) would be produced from the reaction of 3.25 moles of hydrochloric acid (HCl) reacting with excess calcium hydroxide Ca(OH)2?

Ca(OH)2 +2HCl --> CaCl2 + 2H2O

3.25 mol HCL x ?

Question 2 options:

2 mol HCl / 2 mol H2O

2 mol H2O / 2 mol HCl

2 mol HCl / 1 mol CaCl2

1 mol CaCl2 / 2 mol HCl