The glucose concentration in plasma is typically 100 mg% , meaning 100 mg in 100 mL of plasma. The gram molecular weight of glucose is 180 g mol-1. W hat is the molar concentration of this plasma glucose?
A) 50 mM
B) 56 mM
C) 5.0 mM
D) 5 .6 mM
E) 1.8 mM

Question

Quizplus · Accepted Answer

The molar concentration is calculated by dividing the mass of the substance by its molar mass and then by the volume of solution in liters. Here, 100 mg of glucose is 0.1 g, and the molar mass of glucose is 180 g/mol. Thus, $ \frac{0.1 g}{180 g/mol} = 5.56 \times 10^{-4} mol $, and since this is in 100 mL or 0.1 L of plasma, the concentration is $ \frac{5.56 \times 10^{-4} mol}{0.1 L} = 5.56 mM $, which rounds to 5.6 mM.

The Glucose Concentration in Plasma Is Typically 100 Mg