Q. What is molality of a solution in which (18 g glucose mol. wt. = 180) is dissolved in 500 g of water?
A) 1 m
B) 0.5 m
C) 0.2 m
D) 2 m
Explanation
(c)
Molality = $\frac{n \times 1000}{mass\ of\ solvent\ (g)}$
$\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ = \frac{18 \times 1000}{180 \times 500}$ =0.2 m
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.