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Question: If 5.85 gms of NaCl are dissolved in 90 gms of water, the mole fraction of NaClis....

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

A

0.1

B

0.2

C

0.3

D

0.01 (e) 0.0196

Explanation

Solution

(e)

Sol. 5.85 g NaCl =

90 g

mole fraction of NaCl = 0.15+0.1≈0.0196\frac { 0.1 } { 5 + 0.1 } \approx 0.0196.