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How much polystrene of molar mass 900...

How much polystrene of molar mass 9000 g `mol ^(-1)` would have to be dissolved in 100 g of `C_(6) H_(6)` to lower its freezing point by `1.05 K ?`

A

19.3g `

B

`193 g `

C

`38.6 g `

D

`77.2g`

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The correct Answer is:
B
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