Answer to Question #127556 in General Chemistry for mike

Question

Normal levels of cholesterol, C27H46O, in blood serum are around 150mg in 100cm3. Convert this to %m/V and molarity.

Answer 1

1) Concentration of cholesterol in m/V is:

C(C₂₇H₄₆O) = 150 mg/ 100 cm³ = 1.5 g/l

2) Molar concentration of cholesterol is:

M (C₂₇H₄₆O)=386 g/mol

n (C₂₇H₄₆O)=1.5/386=0.004 mol

C_M(C₂₇H₄₆O)=0.004/1 = mol/l