1.

In D-glucose find molality of Glucose if mass % is 10.8% and weight of solution is 250g.(a) 0.6 m(b) 0.06 m(c) 6 m(d) 2.5 m

Answer»

Correct option is (a) 0.6 m

Weight of solution = 250 g

Mass% = 10.8%

Mass of glucose/Mass of solution x 100 = 10.8

Mass of glucose = 10.8/100 x 250 = 27 g

Molality = Mass of glucose/Molar mass of glucose x 1000/wt. of solution

= 27/180 x 1000/250 = 0.6 m



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