J.R. S. answered 11/30/18
Ph.D. University Professor with 10+ years Tutoring Experience
5 gallons @0ºC x 3785 cc/gallon x 0.92 g/cc = 17,411 g = 17,000 g (to 2 significant figures)
If you want the answer is pounds, it will be 17,411 g x 1 pound/454 g = 38 pounds (to 2 significant figures)