The vapour pressures of pure benzene and solution of a solute in benzene at 25°𝐶 are 639.7 mm of Hg and 631.9 mm of Hg. What is the molality of the solution?
A. 0.468 𝑚
B. 0.312 𝑚
C. 0.156 𝑚
D. 0.078 𝑚
Answer:C
The vapour pressures of pure benzene and solution of a solute in benzene at 25°𝐶 are 639.7 mm of Hg and 631.9 mm of Hg. What is the molality of the solution?
A. 0.468 𝑚 B. 0.312 𝑚 C. 0.156 𝑚 D. 0.078 𝑚