11. The partial pressure of CO2 in air at sea level is 0.239 torr. If the solubility of CO2 at this partial pressure and 25C is 0.034 M, calculate kw. What is the molarity of CO2 at Pcos = 7.60 torr. 12. A solution contains a mixture of pentane (CsH12) and hexane (CH4) at room temperature. The solution has a vapor pressure of 266 torr. Pure pentane has a vapor pressure of 465 torr and pure hexane has a vapor pressure of 151 torr at room temperature. Assuming ideal behavior, what is the mole fraction of pentane and the mole fraction of hexane