What is the density of water vapor in g/m^3 on a hot dry day in the desert when the temperature is 50.0°c and the relative humidity is 6.50%?

Explanation:

To get the density you need the vapor pressure for the moisture, to get this first you need to find in tables (found in internet, books, apps) the saturation vapor pressure for water at 50°C:

Now, a relative humidity of 6,5% means that the actual vapor pressure is 6,5% that of the saturated air so:

According to the ideal gases formula density can be calculated as:

Where:

Ideal gases constant

Pressure P = 0,792 atm

Temperature T = 50°C = 323 K

molar mass M = 18 g/mol

i think the answer is a and b

i wish you luck