Question

boiling point of solution of 0.1050g of a substance in 15.84g of ether was found to be 0.1 degree c higher than that of ether. What is the molar mass of the substance (kb=2.02K kg mol-1)​

Answer 1

Answer:143.2

Explanation:$M_{B}$=$k_{b}$$\frac{W_{B}x1000 }{Δ T_{B}xW_{A} }$

k_{b}=21.6 per 100g or 2.16 per 100g

M_{B}=$\frac{2.16x0.105x1000}{0.100x15.84}$=143.2

HOPE YOU UNDERSTAND