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What does a gallon of water with 3 pounds of salt weigh How do you determine this new weight Water weighs 8.345 pounds per gallon and so with 3 pounds of salt dissolved should weigh?
Wiki User
∙ 11y ago
Density = 8.345 lb/gallon (this is an odd density, because density changes depending on temperature, and this number is actually for 40°F water, but that's not relevant to this question)
Density (d) = Mass (m) / Volume (V)
d = m/V
m = Vd
m = (1 gallon ) ( 8.345 lbs / gallon ) = 8.345 lbsThe water (without the salt) weighs 8.345 lbs
If you add 3 lbs of salt, you are just adding 3 lbs of salt. Just add 3 to the weight. This part is just to trip you up.
8.345 + 3 = 11.345 lbs
The water with the salt weighs 11.345 lbs.
Wiki User
∙ 11y ago
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