Calculate the mass of a non-volatile sol...

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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Calculate the mass of a non volatile solute (molar mass 40gmol^-1) which should be dissolved in 114 g octane to reduce its vapour pressure to 8%.

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