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Question

If 5.85 gms of NaCl are dissolved in 90 gms of water, the mole fraction of NaCl is

 Your Option is correct !!

A.

0.1

B.

0.2

C.

0.3

D.

0.0196

Answers (1)

\dpi{100} Mole\: Fraction= \frac{Moles\: o\! f\: solute}{Moles\: o\! f solute+Moles\: o\! f solvent}

 5.85 g NaCl = \frac{5.85}{58.5}mole = 0.1 mol

90 g H_{2} = \frac{90}{18} moles = 5 moles

mole fraction of NaCl =\frac{0.1}{5+0.1}\approx 0.0196

Posted by

Satyajeet Kumar

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