if the maximum amount of water vapor in the air at 15 degrees c is 12.5 g/m^3, what is the actual amount of water vapor in the air if the relative humidity is 85.0%

To calculate the actual amount of water vapor in the air, you need to multiply the maximum amount of water vapor by the relative humidity.

Step 1: Convert the relative humidity into a decimal:
85.0% = 0.85 (Divide by 100)

Step 2: Multiply the maximum amount of water vapor by the relative humidity:
12.5 g/m^3 * 0.85 = 10.625 g/m^3

Therefore, the actual amount of water vapor in the air when the relative humidity is 85.0% is 10.625 g/m^3.