Stoichiometry
Pick out the wrong unit conversion of temperature.

°C = (F- 32) x 0.555
°F = (°C + 17.778) x 1.8
°R = 273 + °F
Temperature difference of 1°K = 1°C = 9/5 °F

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Stoichiometry
The boiling points for pure water and pure toluene are 100°C and 110.6°C respectively. Toluene and water are completely immiscible in each other. A well agitated equimolar mixture of toluene and water are prepared. If, at a total pressure of one standard atm. exerted by the vapours of water and toluene, the mole fraction of water Xw in the vapour phase satisfies

0 < Xw < 0.5
Xw = 1.0
Xw = 0.5
0.5 < Xw < 1.0

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