That would depend on the kind of fat, as not all fats have the same density.
3499
128 one ounce servings in a gallon.
4.536 kg.
6 pounds
7.213 lbs
8.79 pounds
Approximately 6.8 pounds per gallon.
At 17oC one gallon of water weighs 4.536kg.
6.5 lb
The density of ununoctium is not known.
2 liters
32 ounces