Please help with number 186, due 7 am tomorrow

Particles vibrate in a rigid structure and do not move relative to their neighbors.

Which statement best describes what happens when molecular compounds melt

Five different substances are given to you to be dissolved in water. which substances are most likely to undergo dissolution in water? check all that apply. view available hint(s) check all that apply. sodium fluoride, naf octane, c8h18 propanol, ch3ch2ch2oh potassium iodide, ki benzene, c6h6