If the concentration of glucose in blood is 0.9 g l what will be the molarity of glucose in blood

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If the concentration of glucose in blood is 0.9 gram per litre what will be the molarity

If the concentration of glucose (C6H12O6) in the blood is 0.9 g L-1, what will be the molarity of glucose in the blood? (i) 5 M (ii) 50 M (iii) 0.005 M (iv) 0.5 M

Correct Answer: (iii) 0.005 M

Explanation: According to the molarity of a substance which is defined as the number of moles per volume of the solution in litres, the molarity of the glucose in blood is 0.005M.

Text Solution

5M50M0.005M0.5M

Answer : C

Solution : In the given question 0.9 `gL^(-1)` means that 1000(mL) solution contains 0.9g of glucose. <br> `therefore` Number of moles `=0.9g "glucose"=(0.9)/(180)` mol glucose <br> `=5xx10^(-3)` mol glucose <br> (where , molecular mass of glucose `(C_(6)H_(12)O_(6))=12xx6+12xx1+6xx16=180u`) <br> i.e. L solution contains 0.05 mole glucose or the molarity of glucose is 0.005M.