If 1 gallon of a liquid weighs 4 pounds how much would one ounce weight (keep in mind that liquid ounces are different than weight ounces)

64 ounces

Explanation:

Pound is the unit of mass in the imperial system of units. It is used in the United States. Its calibration is done with the SI unit of mass which is kilogram. 1 lb = 0.45359237 kg

1 gallon = 4 pounds

1 pound = 16 ounces weight

So,

4 pounds = 16 * 4 = 64 ounces weight

So, 1 gallon is equal to 64 ounces weight.

1 gallon = 128 fluid ounces.