5 gallons of cement would weight 5 * the weight of 1 gallon
62 lbs
About 42 pounds.
it would weigh 2 ounces.
Question undefined. The answer depends on how much cement you have.
The density of ununoctium is not known.
About 1,670 pounds for 200 US gallons.
100 US gallons of water is about 835 pounds.
That depends on how much you have purchased.
40 pounds
Clear ice weighs about 7.6 lbs per gallon so 21 gallons would weigh about 160 lbs.
5 gallons of rocks, weigh is 41.75
218 lb.
125 lbs
Neither, a bathtub weighs much more.
400kg or there abouts
This can vary do to the mixture of sand, stone, cement... but an approximate average would be 3000 lbs
Fresh fallen snow generally weighs about 1 tenth that of water. so 250 gallons would weigh about 200 lbs and hard packed snow could weigh about 800 lbs or more.