# What is the molar mass of a non-electrolyte compound if 4.28 grams is dissolved in 25.0 grams of chloroform solvent to form a solution which has a boiling point elevation of 2.30 degrees celsius?

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The boiling constant of chloroform is 3.63 degrees Celsius/m

im not sure if this is needed but molar mass of chloroform = 119.38 g/mol

I need a step by step explanation please.

The boiling constant of chloroform is 3.63 degrees Celsius/m

im not sure if this is needed but molar mass of chloroform = 119.38 g/mol

I need a step by step explanation please.

##### 1 Answer

The molar mass is 270 g/mol.

#### Explanation:

The formula for boiling point elevation

#color(blue)(bar(ul(|color(white)(a/a)ΔT_"b" = K_"b"bcolor(white)(a/a)|)))" "#

where

We can rearrange the formula to get

#b = (ΔT_"b")/K_"b"#

In your problem,

∴

You have 4.28 g of compound in 0.0250 kg solvent.

;:

Divide both sides of the equation by

∴

The molar mass is 270 g/mol.