A solution of 2.5g of non-volatile solid in 100g benzene is boiled at `0.42^(@)C` higher than the boiling point of pure benzene. Calculate the molecular mass of the substance. Molal elevation constant of benzene is `2.67 "K kg mol"^(-1)`.

The solution of 2.5 g of a non-volatile substance in 100 g of benzene boiled at a temperature 0.42^(@)C higher than the b.p. of pure benzene. Calculate mol. Wt. of the substance. ( K_(b) of benzene is 2.67 K kg "mole"^(-1) )

Nirtobenzene is formed as the major product along with a minor product in the reaction of benzene with a hot mixture of nitric acid and sulphuric acid. The minor product consists of carbon 42.86% , hydrogen 2.40% , nitrogen 16.67% and oxygen 38.07% . a. Calculate the empirical formula of the minor product. b. When 5.5 g of the minor product is dissolved in 45 g of benzene, the boiling point of the solution is 1.84 C higher than that of pure benzen. Calculate the molar mass of the minor product and determine its molecular and structural formulae. (Molar elevation constant of benzene is 2.53 K kg mol^(-1))

A solution of solute X in benzene boils at 0.126^(@)C higher than benzene. What is the molality of the solution ?

0.15 g of a subatance dissolved in 15 g of solvent boiled at a temperature higher at 0.216^(@) than that of the pure solvent. Calculate the molecular weight of the substance. Molal elecation constant for the solvent is 2.16^(@)C

The boiling point of a solution of 0.0150g of a substance in 15.84g of ether was found to be 100^(@)C higher than that of pure ether.What is the molecular weight of the substance [Molecular elevation constant of ether per 100

0.75 g of a non-electrolyte was dissolved in 87.9 g of benzene. This raised the boiling point of benzene by 0.25^(@)C . If the molecular mass of non-electrolyte is 103 , calculate the molal elevation constant for bezene.