Calculate Molality (in $M$ ) of a solution in which 36 gm glucose is dissolved in 500 gm water.

0.8

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0.4

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0.2

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0.36

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Solution

The correct option is B
0.4

From molality formula, we know
Molality = $\frac{M o l e s o f s o l u t e}{M a s s s o l v e n t (k g)}$
Solute is glucose, whose molecular mass is 180.

M= (36X 1000)/180X 500= 0.4

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