# What is the mass percent, molality and mole fraction of a solution made by dissolving 4g of sodium hydroxide in 90 g of water?

##### 1 Answer

Jan 4, 2017

#### Explanation:

For the purposes of illustration, we now calculate the mole fraction of water in the solution:

The sum of the mole fractions is unity, as required.

Given that the molality will be near as dammit identical to molarity in suh a solution, what is the