None, since there can be no conversion.
A gallon is a measure of volume. A pound is a measure of mass. The two measure different things and, according to basic principles of dimensional analysis, conversion from one to the other is not valid.
That depends on the type material you are referring to. Please edit your question to include more context or details.
A gallon is a unit of capacity. A pound is a unit of mass. Without some unit of density to compare, the two units are incompatible.
There is 1.98 gallons in 7.5 liters
This would be about 600 pounds. Pounds is a unit of mass/weight. Gallons is a liquid measure. They do not convert cleanly. The density of the liquid being measured can make a big difference. If the liquid is water, there is 8 pounds to a gallon.
It should be around 25 gallons or around 121.95 pounds of propane
Nine US gallons of water weighs about 75.15 pounds.
Five gallons of pure water weighs 41.725 pounds @8.345lbs per gallon.
75 pounds is 34.0194 kilos.
This would be about 600 pounds. Pounds is a unit of mass/weight. Gallons is a liquid measure. They do not convert cleanly. The density of the liquid being measured can make a big difference. If the liquid is water, there is 8 pounds to a gallon.
75 US gallons = 284 L
75 US gallons is 9,600 fluid ounces.
42 gallons of water is 350.7 pounds
165.35 pounds
75 pounds = 34.0194277 kilograms.
75 pounds is 5.35 stone
10 US gallons is approximately 83.5 pounds
30 pounds of water is 3.593 gallons.
About 250.5 pounds for 30 US gallons.
10 gallons of water is 83.5 pounds
75 g = 0.1653 lbs.