A sample of dry carbon dioxide gas is bubbled through a liquid which it does not dissolve in; the gas carries off some vapour of the liquid. Under identical conditions of temperature and pressure, a d

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A sample of dry carbon dioxide gas is bubbled through a liquid which it does not dissolve in; the gas carries off some vapour of the liquid. Under identical conditions of temperature and pressure, a definite volume of the wet carbon dioxide is found to weigh less than an equal volume of the dry gas. The liquid may be

TestHub · Accepted Answer

Equal volumes at the same T and P hold equal total moles; the wet CO₂ is lighter only if the vapour has molar mass below that of CO₂ (44 g/mol), so that vapour replaces heavier CO₂ molecules. M(H₂O) = 18 and M(CH₃OH) = 32 are below 44; M(C₆H₆) = 78 and M(CCl₄) = 154 are above. Hence (a) and (d).

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