Stoichiometry
A vessel of volume 1000 m³ contains air which is saturated with water vapour. The total pressure and temperature are 100 kPa and 20°C respectively. Assuming that the vapour pressure of water at 20°C is 2.34 kPa, the amount of water vapour (in kg) in the vessel is approximately

25
34
17
20

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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

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

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Stoichiometry
In a binary liquid solution of components A and B, if component A exhibits positive deviation from Raoult's law, then component B

May exhibit either positive or negative deviation from Raoult's law
Exhibits positive deviation from Raoult's law
Exhibits negative deviation from Raoult's law
Obeys Raoult's law

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