The same as above the water. Lead is a dense metal and has no bouyancy at all.
A gallon of fresh water is heavier than a gallon of sea water because fresh water is denser than sea water.
A gallon of water weighs approximately 8.34 pounds (3.78 kilograms) at room temperature.
One gallon of fresh water weighs 8.36 pounds (8 pounds 5.76 ounces)
Weigh an empty container; pour a gallon of water into it. Weigh it again. Calculate the difference. That is the weight of the gallon of water.
A touch under 8 pounds.
A gallon of water weighs about 8.34 pounds. So, a 50 gallon water heater full of water would weigh approximately 417 pounds.
About 8.35 pounds per US gallon.
A gallon of water weighs approximately 8.34 pounds.
A gallon of water weights 8 pounds. It can vary a bit according to temperature.
== Probably close to the weight of water. 8.34 lbs per gallon.
The weight of water is approximately 8.34 pounds per gallon. So, 400 gallons of water would weigh around 3,336 pounds.
One gallon of seawater from the Gulf of Mexico weighs approximately 8.6 to 8.7 pounds, depending on its salinity and temperature. Seawater is denser than fresh water due to the dissolved salts, which is why its weight is slightly higher than the 8.34 pounds of fresh water per gallon. This variation can occur in different locations and conditions within the Gulf.