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.

Which best describes the present-day universe? opaque, expanding very slowly, stars produce heavy elements transparent, expanding at an accelerated rate, stars produce heavy elements opaque, expanding at an accelerated rate, stars produce only hydrogen and helium transparent, expanding very slowly, stars produce only hydrogen and helium