The mole fraction of ozone in an air sample at a monitoring station is measured to be 155 109. What is the volumetric ratio of the ozone in ppbv ? Question 2 1 pts If partial pressure of oxygen is PO2 and volumetric fraction of oxygen is VO2, Which statement is correct? PO2 in Sacramento is greater than PO2 in Lake Tahoe VO2 in Sacramento is greater than VO2 in Lake Tahoe PO2 in Lake Tahoe is greater than PO2 in Sacramento VO2 in Lake Tahoe is greater than VO2 in Sacramento