How do you convert gallons of water to pounds?

To convert gallons of water to pounds, the correct method is to multiply the number of gallons by 8.34. This conversion factor is based on the density of water, which is approximately 8.34 pounds per gallon at standard temperature and pressure.

When you're dealing with gallons of water, you're using a volume measurement. Since pounds are a measure of weight or mass, you need a conversion factor that relates these two types of measurements. The value of 8.34 pounds per gallon allows you to accurately determine the weight of a given volume of water. Therefore, by multiplying the number of gallons by 8.34, you obtain the total weight in pounds.

The other options do not provide an effective way to convert gallons to pounds. Adding a percentage for measurement error, dividing by a number, or subtracting pounds per gallon does not correctly represent the conversion needed for this specific calculation. Understanding the density of water as 8.34 pounds per gallon is key to making accurate conversions in various applications, especially in fields involving fluid dynamics, civil engineering, and environmental studies.