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Question

If the molarity of 200 ml solution of glucose (C6H12O6) is 0.2, then the mass of glucose present in the solution is:
  1. 18 g
  2. 7.2 g
  3. 12.4 g
  4. 36.2 g

A
18 g
B
12.4 g
C
36.2 g
D
7.2 g
Solution
Verified by Toppr

Given molarity of the solution =0.2

Volume of solution =200ml=0.2 L

Molarity=Moles of soluteVolume in litres

Moles of solute =0.2×0.2=0.04

No. of moles=Given massMolar mass

Molar mass of C6H12O6=6×12+12+6×16=180g

Mass of glucose in the solution = 180×0.04=7.2g

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