What is the molality of a solution containing 18 gm of glucose dissolved in 500g of water?

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Solution

molality is ratio of (no of moles of solute) and (weight of solvent in kg)
no of moles of solute = $\frac{g i v e n m a s s}{g r a m m o l e c u l a r m a s s}$

no of moles of solute = $\frac{18}{180}$ = 0.1

weight of solvent in kg = $\frac{500}{1000}$ = 0.2
molality= $\frac{0.1}{0.2}$

molality= $0.5$
the answer is $0.5$

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