Sodium chloride (nacl) is an ionic solid. it dissolves easily in water. which property of water allows it to dissolve nacl?

water has a high specific heat.
water contains oxygen.
water has surface tension.
water is a polar molecule.

Two changes are described below. a green banana turns yellow and ripens. a layer of rust forms on an iron nail. which statement is true about the two changes? a) both are chemical changes because new substances are formed. b) both are physical changes because only the physical state of the substances change. c) a is a physical change due to a change of state, but b is a chemical change because new molecules are formed. d) a is a chemical change due to a change of state, but b is a physical change because new molecules are formed.