It depends on the size of the mass: a swimming pool will have a greater mass and hold more gallons than a kitchen sink.
Gallons can't be converted to grams. Gallons measure volume, while grams measure mass.
20 gallons of water has a mass of about 167 pounds.
2.5 million liters of water is equal to about 549,923.121 UK gallons or 660,430.131 US gallons.
400 pounds of plain water is about 48 gallons.
mass = density x volume mass = 1g/cm^3 x 22,024,419cm^3 ans = 22.024419tonnes
a cloud
The great lakes
That depends on what kind of substance occupies the 55 gallons of space.If it's 55 gallons of air, then there are very few kilograms of mass in it.If it's 55 gallons of water, then its mass is about 208 kilograms.If it's 55 gallons of granite, then its mass is a lot more than 208 kilograms.If the 55 gallons of space is empty, then there are no (zero) kilograms of mass in it.
Salt water is more dense than fresh water because salt water has more mass than fresh water.
For fresh water at room temperature, it is 25 grams
Since a gallon is a unit of volume, and a pound is a unit of weight, which is mass times gravity, it depends on the density (mass divided by volume) of what you're measuring. For example, 300 gallons of oil weighs a lot less than 300 gallons of water.
About 240 gallons. The short US ton has 907,1847 kg; the density of water is 1 g/cm3. So the short ton is equal to 907,1847 L. The US gallon has 3,785 411 784 L, so 1 ton is equal (as mass) to 239,65 US gallons of water.