Does a gal of water weigh same as cola?

A gallon of water weighs the same as a gallon of cola. This is because a gallon is a unit of volume, not weight. A gallon of water and a gallon of cola both take up the same amount of space, so they weigh the same amount.

The density of water is 1 gram per cubic centimeter (g/cm^3). This means that for every cubic centimeter of water, there is 1 gram of water. The density of cola is slightly less than that of water, at 0.97 g/cm^3. This means that for every cubic centimeter of cola, there is 0.97 grams of cola.

So, a gallon of water weighs 8.34 pounds (lb), and a gallon of cola weighs 8.06 lb. The difference in weight is due to the difference in density between water and cola.