A sample of the gas butane (C4H10), of unknown mass, is contained in a vessel of unknown volume, V, at 24.8 degress celsius and a pressure of 560.0 torr. To this vessel 8.6787g of Ne are added in such a way that no butane escapes. The total pressure of the vessel (at the same temperature) is 1420 torr. Calculate the volume of the vessel and the mass of the butane.