The organic compounds chloroform and dichloromethane form ideal solutions when mixed together; at 25 �C the total vapor pressure from a mixture of these two compounds was 345.322 torr. What is the mole fraction of chloroform? Given that the vapor pressure of pure chloroform and pure dichloromethane are 205 torr and 415 torr, respectively, at 25�C.  0.6682    0.4430  0.3318  0.5570

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