The mass of a non-volatile solute of mol...

The mass of a non-volatile solute of molar mass `40gmol^-1` that should be dissolved in 114 g of octane to lower its vapour pressure by 20% is

11.4g

9.8g

12.8 g

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Calculate the mass of a non-volatile solute ( molar mass 40g mol^-1 ) which should be dissolved in 114g octane to reduce its vapour pressure to 80%.

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