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What is the mass of a non-volatile solut...

What is the mass of a non-volatile solute (molar mass 60) that needs to be dissolved in 100 g of water in order to decrease the vapour pressure of water by 25%. What will be the molality of the solution?

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To solve the problem, we need to find the mass of a non-volatile solute (with a molar mass of 60 g/mol) that must be dissolved in 100 g of water to decrease the vapor pressure of water by 25%. We will also calculate the molality of the resulting solution. ### Step-by-Step Solution: 1. **Identify the Initial Vapor Pressure of Water:** - Let the initial vapor pressure of pure water (P₀) = 100 mmHg (assumed for simplicity). 2. **Calculate the Vapor Pressure of the Solution:** ...
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