What is the total mass of D-glucose dissolved in a 2-μL aliquot of the solution used for this experiment?

The total mass of D-Glucose dissolved in a 2μL aliquot is 1 E-4 g

Explanation:

providing a solution to 5% weight-volume as found in commerce:

⇒ % 5 = (5g d-glucose / 100 mL sln) * 100

⇒ 0.05 = g C6H12O6/mL sln

⇒ g C6H12O6 = (2 μL sln) * (0.001 mL/μL) * (0.05 g C6H12O6/mL sln)

⇒ g C6H12O6 = 1 E-4 g C6H12O6