1.

A mixture contains 80% of NaOH and 20% H2O by weight, what is the mole fraction of NaOH?(a) 0.24(b) 0.42(c) 0.64(d) 0.78

Answer» Right option is (c) 0.64

Best explanation: Mole fraction of HCl = (80/40)[(80/40) + (20/18)] = 0.64.


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