22 at 101.3 kpa and 298 k, a 1.0-mole sample of which compound absorbs the greatest amount of heat as the entire sample dissolves in water? (1) libr (3) naoh
(2) nacl (4) nh4cl

The answer for #3 is c but i don't know why

Which of the following is true for the actual yield of a reaction? it is always calculated as a ratio. it is the yield from the excess reactant. it is the yield from the limiting reactant. it is always less than the theoretical yield.

In a water molecule, hydrogen and oxygen are held together by a(an) bond. a) double covalent b) ionic c) nonpolar covalent d) hydrogen e) polar covalent