Answer: The volume of water vapor is 48.7 L
Step-by-step explanation:
To calculate the number of moles, we use the equation given by ideal gas equation:

Or,

where,
P = pressure = 100 kPa
V = Volume = ?
m = mass of water vapor = 36 grams
M = molar mass of water = 18 g/mol
R = Gas constant =

T = temperature = 293 K
Putting values in above equation, we get:

Hence, the volume of water vapor is 48.7 L