That depends on the type material you are referring to. Also, these are two different types of measurements. Gallons is a measure of volume but the other is weight or mass. Please edit your question to include more context or details.
eight and a half pounds
You can use 4 pounds as a rough measure. 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.
32 half pints makes one gallon
There are eight pints in a gallon. Therefore, a gallon of milk is going to weight approximately eight pounds.
One gallon of microcrystalline wax weighs about seven pounds. One cubic foot of wax is about 7.48 gallons of wax.
A half gallon of water weighs approximately 4 pounds.
Pounds of what? Feathers, lead, milk . . . .?
eight and a half pounds
2
A gallon of milk weighs 8.6 pounds since 1 gallon is double the amount of a half gallon.
1 gallon of water weighs 8.3333 pounds. However, the weight depends upon the specific gravity of the liquid you are measuring.
how many pounds in a gallon
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.
How many pounds of pecans do I have in a 55 gallon trash can
1/2 US gallon is two quarts.
there are eight half-pints in a half-gallon
At current prices, you would get around a half a gallon.