If the pressure exerted by ozone, O3, in the stratosphere is 3.0×10−3atm and the temperature is 246 K , how many ozone molecules are in a liter?
Express your answer using two significant figures.
Carbon dioxide makes up approximately 0.04% of Earth's atmosphere. If you collect a 2.3 L sample from the atmosphere at sea level (1.00 atm) on a warm day (29 ∘C), how many CO2 molecules are in your sample?
