The weight of 1 gallon of pure water at room temperature is 8.329 pounds. The weight varies with temperature, ranging from 8.344 pounds at 32 F, the freezing point, to 7.996 pounds at 212 F, the boiling point. Water is at its heaviest at 39.2 F.
Water's weight varies with how densely its molecules pack together. At high temperatures, the molecules are farther apart. Impurities, including minerals, gases, bacteria or dissolved chemicals, affect the weight of water from common sources such as the tap or a pond. Natural seawater, with a roughly 3.5 percent salt concentration, weighs about 8.56 pounds per gallon. Ice, the solid form of water, is 9 to 10 percent less dense than liquid water, which is why it floats.Learn More
Milligrams and gallons measure two different things and cannot be equated. However, if the substance in question is water, then 1 gallon of water is equal to 3785.411784 milligrams of water in most cases.Full Answer >
There are 20 quarts in a 5-gallon jug. By definition, 1 fluid quart is equal to one-fourth fluid gallon; conversely, there are 4 quarts in a gallon.Full Answer >
A number to the power of negative one is equal to one over that number. For example, five to the negative one power equals one over five, or 1/5.Full Answer >
Students in first grade initially learn about basic math concepts, such as addition and subtraction. They also are introduced to learning how to tell time and count money. Most math problems that students in first grade tackle are written in numerical form; word problems are introduced later.Full Answer >