The Following Reaction Illustrates the Reaction of Methanol with Oxygen

Multiple Choice

The following reaction illustrates the reaction of methanol with oxygen to form carbon dioxide and water:
2 CH₃OH( l ) + 3 O₂( g ) → 2 CO₂( g ) + 4 H₂O( l ) .
How many moles of water are produced in a reaction of 15 moles of methanol with 30 moles of oxygen?

A) 20
B) 30
C) 40
D) 50