Answer:
Atmospheric density,
Given:
Gas constant for dry air, R = 287
Temperature of gas,
Pressure of gas,
Solution:
Now, to calculate the atmospheric density, we follow:
The eqn for an ideal gas is given by:
where
n = no. of moles of gas
n =
Also, we can write,
Comparing both the values of n, we get:
(1)
Now, the molecular mass of air can be calculated as:
(Since, Oxygen and nitrogen constitutes to about 21% and 78% in the atmosphere)
Using the value above in eqn (1):