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Standard XII
Chemistry
Expressing Concentration of Solutions
Question

What will be the molality of a solution having $$18 \,g$$ of glucose (mol. wt. = 180) dissolved in $$500 \,g$$ of water?

A
$$2 \,m$$
B
$$0.2 \,m$$
C
$$1 \,m$$
D
$$0.5 \,m$$
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Solution
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Correct option is C. $$0.2 \,m$$
$$m = \dfrac{18 \times 1000}{180 \times 500} = 0.2 m$$

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