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When the temperature of the water is 4°C, 1 cubic foot of it (1,728 cubic inches)

weighs 62.428 pounds, and that weight is not going to change when the water

freezes.

1 US fluid gallon = 231 cubic inches

( 231/1728 of a cubic foot) x (62.428 pounds per cubic foot) = 8.345 pounds (rounded)

(If that water were warmer than 4°C, then each gallon would weigh less,

both before and after it freezes.)

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12y ago

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