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What is the mole fraction of a solute, i...

What is the mole fraction of a solute, in 2.5 m aqueous solution ?

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`x_B = (m)/(m + (1000)/(M_A) ) = (2.5)/(2.5 + 1000/18) = (2.5 xx 18)/(1045) = 45/1045 = 0.043`
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