I need this filled out- so at least just give me a couple of the answers

Apure solvent has a vapor pressure the vapor pressure of a solution. a. equal to b. lower than c. higher than

Why is silver chloride is an ionic compound

Acalorimeter is to be calibrated: 51.203 g of water at 55.2 degree c is added to a calorimeter containing 49.783 g of water at 23.5c. after stirring and waiting for the system to equilibrate, the final temperature reached is 37.6 degree c. specific heat capacity of water (s = 4.18 j/g∙degree c). calculate the calorimeter constant. (smδt)warm water = -[(smδt)cold water + (calorimeterδtcold water)]