Based on the recipe for the dextrose calcium carbonate (dcc) medium, what is the percent concentration (%weight/volume) of dextrose? note: the recipe is based on a final volume of 1 l, not 100 ml. here is the recipe: 5.0g yeast extract, 1.0g k2hpo4, 0.5g mgso4, 20.0g dextrose (glucose), 10.g caco3, 18.0g agar, and 1.0 l dh2o

The percent concentration ( % m/v) of dextrose in the solution is 2 %

Explanation:

We are given:

Mass of Yeast Extract = 5.0 grams

Mass of = 1.0 grams

Mass of = 0.5 grams

Mass of Dextrose = 20.0 grams

Mass of = 10. grams

Mass of Agar = 18.0 grams

Volume of solution = 1 L = 1000 mL      (Conversion factor: 1 L = 1000 mL)

% (m/v) is defined as the concentration, which is mass of solute present in 100 mL of solution

To calculate the mass of solute, we apply unitary method:

In 1000 mL of solution, the mass of dextrose present is 20.0 grams

So, in 100 mL of solution, the mass of dextrose present will be =

Calculating the % (m/v) of dextrose, we get:

Hence, the percent concentration ( % m/v) of dextrose in the solution is 2 %

the formula mass of a molecule or a compound is the sum of the atomic weights of the atoms in its empirical formula

(that's what i know about formula mass)