5 moles of sucrose (molecular mass = 342g `"mol"^(-1)` ) dissolved in 1000g of water (molecular mass = 18g `"mol"^(-1)`). Vapour pressure of pure water at 298K = 4:57 mm Hg. What will be the vapour pressure of sucrose solution at the same temperature?
A
0.419 mm Hg
B
6.570 mm Hg
C
4.190 mm Hg
D
0.657 mm Hg
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