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On mixing heptane octane from an ideal s...

On mixing heptane octane from an ideal solution. At 373K, the vapour pressures of the two liquid components are 105kPa and 45kPa respectively. Vapour pressure of the solution obtained by mixing 25.0 g of heptane and 35 g of octane will be (molar mass of heptane=`100 g mol^-1` and of octane=`114 g mol^-1`)

A

96.2 kPa

B

144.5 kPa

C

72.0 kPa

D

36.1 kPa

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