reativity of alkali metals increases down the group while reativity decreases down the group in helogens

What produces wave a)sound b) heats c)transfer of energy d)vibrations

Assuming complete dissociation of the solute, how many grams of kno3 must be added to 275 ml of water to produce a solution that freezes at -14.5 c? the freezing point for pure water is 0.0 c and k_f is equal to 1.86 c/m

Will a solution form when the solvent and solute are both nonpolar? a. not likely b. never c. most likely