Final answer:
To find the weight of a substance measured in gallons, use conversion factors. In the Customary standard system, 4 quarts equal 1 gallon. In the Metric system, 1 liter is equal to 1 kilogram. Multiply by 4 to find the weight in pounds or divide by 1 to find the weight in kilograms.
Step-by-step explanation:
To figure out the weight of a substance measured in gallons, we need to use conversion factors. In the Customary standard system, 4 quarts equal 1 gallon. In the Metric system, 1 liter is equal to 1 kilogram. So if we know the weight/mass of the substance in quarts, we can multiply it by 4 to find the weight in pounds, or divide it by 1 to find the weight in kilograms. For example, if a substance weighs 8 quarts, the weight in pounds would be 8 x 4 = 32 pounds.