In class we did an experiment whose goal was to determine themolar mass of hexan

Question

In class we did an experiment whose goal was to determine themolar mass of hexane using the ideal gas law.
We used two methods. One method, we knew the mass of hexane, the pressure which itexerted (it was in a flask--we boiled it till gaseos, and used apressure measuring device), and its initial and boiling temp. The other method we knew the mass of the hexane, the boilingtemp and the air pressure. The ideal gas law states PV=nRT. Without a V, how would one goabout determining the molar mass of hexane with the information inthis experiment? Note, the two methods were prefromed seperatly and theirvalues neither relate, nor can they interchange. In class we did an experiment whose goal was to determine themolar mass of hexane using the ideal gas law.
We used two methods. One method, we knew the mass of hexane, the pressure which itexerted (it was in a flask--we boiled it till gaseos, and used apressure measuring device), and its initial and boiling temp. The other method we knew the mass of the hexane, the boilingtemp and the air pressure. The ideal gas law states PV=nRT. Without a V, how would one goabout determining the molar mass of hexane with the information inthis experiment? Note, the two methods were prefromed seperatly and theirvalues neither relate, nor can they interchange.

Explanation / Answer

Well, if it was a liquid, did you measure the amount inmillimeter? that would give you the volume. Otherwise since the density of a liquid hardly changesovertime, you could use P = (density of hexane)*RT Hope that helps

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