How much does a gallon of ammonia (NH3) weigh?

The weight of a gallon of ammonia (NH3) is approximately 5.15 pounds, making this the correct answer. This value is derived from the fact that ammonia has a density of about 0.77 grams per milliliter. To convert this density into a weight measurement for a gallon, one can use the conversion factors for gallons to milliliters (1 gallon = 3,785.41 milliliters).

First, calculate the total weight of ammonia in a gallon:

1. Convert gallons to milliliters:

1 gallon = 3,785.41 mL.

2. Then, convert the density from grams per milliliter to pounds. Knowing that 1 gram is approximately 0.00220462 pounds, you can convert the density:

0.77 grams/mL × 0.00220462 pounds/gram = approximately 0.00170 pounds/mL.

3. Finally, multiply this weight per mL by the total volume in mL (3,785.41 mL):

3,785.41 mL × 0.00170 pounds/mL = approximately 6.43 pounds.

However, this calculation does yield a slightly different result