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It depends on how dilute the antifreeze is, for cars, antifreeze is usually a mixture of antifreeze and water. However, ethylene glycol is the main component of antifreeze with a density of 1.09 grams per centimeters cubed. Or 1.09 grams per mililiter which is 1090 grams per liter. One gallon is 4 quarts or 3.7854 liters. So, 1090 grams per liter, times 3.7854 liters equals 4125.65 grams. Times this by the conversion factor of 1 pound equal to 453.59 grams. Then, a gallon of ethylene glycol weighs about 9 pounds. An undiluted gallon of antifreeze weighs 9.33 pounds per gallon.

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17y ago

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