Air pollution in the Mexico City metropolitan area isamong the worst in the world. The concentration of ozonein Mexico City has been measured at 441 ppb (0.441 ppm).Mexico City sits at an altitude of 7400 feet, which meansits atmospheric pressure is only 0.67 atm. (a) Calculatethe partial pressure of ozone at 441 ppb if the atmosphericpressure is 0.67 atm. (b) How many ozone molecules are in1.0 L of air in Mexico City? Assume T = 25 °C.

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