# Problem: If the pressure exerted by ozone, O3, in the stratosphere is 3.0 x 10 -3 atm and the temperature is 251 K , how many ozone molecules are in a liter?

###### FREE Expert Solution

$\overline{){\mathbf{PV}}{\mathbf{=}}{\mathbf{nRT}}}$

P = pressure, atm
V = volume, L
n = moles, mol
R = gas constant = 0.08206 (L·atm)/(mol·K)
T = temperature, K

###### Problem Details

If the pressure exerted by ozone, O3, in the stratosphere is 3.0 x 10 -3 atm and the temperature is 251 K , how many ozone molecules are in a liter?