Ozone molecules in the stratosphere absorb much of the harmful radiation from the sun. the temp. and the pressure of ozone in the stratosphere are 250 K and 1.0*10^-3 atm. How many ozone molecules are present in 1.0 L of air under these conditions?
The ideal gas law is,
PV = n RT
where R = 0.0821 L atm/mol K and n is the number
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