1.) What is the molecular weight of the ketone shown below? 2.)Dry ice sublimes at −78.5 oC at a pressure of 1 atm. At room temperature and 1 atm pressure, what is happening to the dry ice molecules on a molecular level as sublimation occurs?

3.)For the pairs of molecules given below, list the intermolecular forces in each molecule. Also, give the types of electrostatic interactions that could occur between each pair of molecules

cyclohexane and CH2Cl2

CH3CH2OCH2CH3 and CH3CN