Water has a higher boiling point than expected because a. there is so much water vapor in the atmosphere. b. water molecules are not very massive. c. hydrogen and oxygen form single covalent bonds. d. of the strong attractions between polar water molecules

in chemistry, a solution’s concentration is how much of a dissolvable substance, known as a solute, is mixed with another substance, called the solvent. the standard formula is c = m/v, where c is the concentration, m is the mass of the solute dissolved, and v is the total volume

im not exactly sure but i think its b!