The equilibrium vapor pressure of a molten ionic compound is likely to be

The equilibrium vapor pressure of a molten ionic compound is likely to be lower than that of ether. Ionic compound is a chemical compound composed of ions held together by electrostatic forces termed termed ionic bonding. Vapor pressure of a pure compound is the pressure characteristic at any given temperature of a vapor in equilibrium with its liquid or solid form. 

The independent variable is the type of music.the dependent variable is the pulse rate.the intervening variable is the age of the subject.if the mother does not like rock, her pulse is likely to not increase.the same might be true for the sister.the friend may like rap and gets excited.to establish cause/effect relationship, all of the subjects must be consistent.hope i .