Calculate either h,0") or (oh") for each of the solutions at 25°c.
solution a: (oh) = 2.61 x 10-7m
solution a: 1,0+1 =
solution b: (,0) = 9.73 x 10-'m
solution b: oh
solution c: h,0+1 = 0.000591 m
solution c: [oh] = 0
which of these solutions are basic at 25 °c?
solution a: (oh) = 2.61 x 10-7m
solution b: h,0+) = 9.73 x 10-'m
solution c: h0+] = 0.000591 m

the answer is barium and copper bromide

water and alcohols have similar properties because water molecules contain hydroxyl groups that can form hydrogen bonds with other water molecules and with alcohol molecules, and likewise alcohol molecules can form hydrogen bonds with other alcohol molecules as well as with water.

the formula mass of a molecule or a compound is the sum of the atomic weights of the atoms in its empirical formula

(that's what i know about formula mass)