A gallon of water is heavier (about 7 1/2 lbs per gallon) than gasoline (about 5.8 lbs per gallon).
This is also the reason that gas floats on top of water.
Equivalent in what way? Gasoline and water are two entirely different chemical compounds. They have dissimilar physical and chemical properties because, well, they are different. Perhaps you are referring specifically to the weight of a gallon of each. If so, then the weight of a gallon of each substance is not equivalent because the gas is less dense than water, so a gallon of water weighs more. When referring to volume, a gallon of gas is equivalent to a gallon of water. Even a gallon of oxygen is equivalent to a gallon of water, in reference to volume. However, when dealing with gases, pressure, temperature, and the number of molecules of the gas must be taken into account.
That's depends on what fluid you want to weigh, "Water" at 8.34lbs per gallon would weigh 391.98lbs. for 47 gallons, different liquids have different weights. Example: Gas, (for car) weighs less then water, gas will float on water. depending on what type of Gas, Gas weighs from, 5.8 to 6.15lbs. per gallon.
One gallon of liquefied natural gas (LNG) weighs approximately 3.7 pounds.
The weight of a gallon of gas can vary depending on the type of fuel, but on average, a gallon of gasoline weighs about 6.3 pounds (2.8 kilograms).
At 60 degrees Fahrenheit, a gallon of pure water weighs 8.34 pounds, whereas a gallon of vehicular gasoline weighs about 6.15 pounds at that temperature. == == Diesel weights about 7.1 pounds per gallon. The answer is really in relation to how much more work the car/vehicle has to do carrying more gas around. Then I suppose you have to offset it with how uneconomic it is to have to regularly stop and fill up. Slowing a car and then accelerating again wastes gas. I suggest removal of all stop signs in the US (I am from the UK by the way)!
We know you'll find this nearly impossible to believe, but in the situation where they are the same gas, modern science has never been able to detect or measure any difference in their weights.
1 gallon of propane gas weighs 4.2 pounds.
It depends on what you have 12.5 gallons of. Water weighs 8.34 pounds per gallon. so 12.5 gallons x 8.34 pounds per gallon =104.25 pounrds. Gasoline weighs only about 6.2 pounds per gallon. 12.5 gallons x 6.2 pounds per gallon = 77.5 pounds.
In flight planning we assume 6 pounds per gallon for fuel
Examples of a gallon include a gallon of milk, a gallon of gasoline, and a gallon of water.
maybe 5 or 7 pounds
An American gallon of gasoline weighs about 6.4 pounds. Not counting water vapour, ach pound of gasoline produces about 2 to 3 pounds of greenhouse gases.