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A solution is prepared by adding 2 g of ...

A solution is prepared by adding 2 g of a substance A to 18 g of water. Calculate the mass per cent of the solute.

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Mass per cent of A = `("Mass fo A")/("Mass of solution")xx 100`
= `(2g)/("2g of A + 18 g.of water")xx 100`
= `(2g)/(20 g)xx 100=10%`
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