Passage III
A mole is 6 x 1023 molecules or formula units of a compound. Thus, the number of sucrose molecules in 1 mole of sucrose equals the number of NaCl units in 1 mole of NaCl. Molality (m) is a unit of concentration defined as:
When a substance is dissolved in a solvent, the freezing and boiling points of the solution will differ from those of the pure solvent. These changes depend on the concentration show how the freezing point and the boiling point, respectively, of H2O at 1 atm of pressure vary with concentration for 3 solutes.
14. For sucrose, which of the following values is sufficient to convert the values on the x-axes of Figures 1 and 2 to grams of solute per kg of solvent?
Your Answer is
Correct Answer is H
Explanation
The unit of Molar mass is g/mol. See the formula m=moles/kg in the article, so after bringing in molar mass, the unit of m can be changed to g/kg