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A gallon of Butane weighs 4.81 pounds per gallon
128 one ounce servings in a gallon.
One gallon of plain water weighs about 8.35 pounds/3.79kg
Approximately 6.8 pounds per gallon.
At 17oC one gallon of water weighs 4.536kg.
4.536 kg.
8.79 pounds
7.213 lbs
6 pounds
== Probably close to the weight of water. 8.34 lbs per gallon.
1 gallon of gasoline equals 5.8 to 6.5 lbs.