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Question

(a) The vapour pressure of n-hexane and n-heptane at 273K are 45.5mmHg and 11.4mmHg, respectively.What is the composition of a solution of these two liquids if its vapour pressure at 273K is 37.3mmHg.
(b) The mole fraction of n-hexane in the vapour above a solution of n-hexane and n-heptane is 0.75 at 273K.
What is the composition of the liquid solution?

A
(a)0.76,0.24,(b)0.61
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B
(a)0.67,0.33,(b)0.57
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C
(a)0.59,0.41,(b)0.67
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D
None of these
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