An aqueous solution with density 0.980 g/mL at 20 C is prepared by dissolving 11.3 mL CH3OH (d=.793 g/mL) in enough water to produce 75.0 mL of solution. What is the percent CH3OH, expressed as a) volume percent; b) mass percent; c) mass/volume percent; and d) mole percent?
The solubility of CO2(g) is 149 mg CO2/ 100 g H2O at 20 C when the CO2 (g) pressure is maintained at 1 atm. What is the concentration of CO2 in water that is saturated with air at 20 C? Express this concentration as mL CO2 (STP)/ 100 g H2O. Use the fact that the mole percent of CO2 in air is 0.037%.
Help with either of these problems would be greatly appreciated !!
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