question_answer 50)

  If the concentration of glucose (\[{{C}_{6}}{{H}_{12}}{{O}_{6}}\]) in blood is 0.9 g \[{{L}^{-1}}\], what will be the molarity of glucose in blood? (a) 5 M                                  (b) 50 M (c) 0.005 M                          (d) 0.5 M

Answer:

  (c) Molarity, \[M=\frac{{{w}_{B}}\times 1000}{{{m}_{B}}\times V}\] \[{{w}_{B}}=0.9g,\,\,\,\,{{m}_{B}}=180,\,\,\,V=1000mL\] \[\therefore \]              \[M=\frac{0.9\times 1000}{180\times 1000}=0.005M\]