Question

1. find the mass in mg to prepare a 5.5 mg/ml of protease in 15 ml of di water.

Explanation:

Step1: Recall the concentration - mass - volume formula

Concentration $C=\frac{m}{V}$, where $C$ is concentration, $m$ is mass and $V$ is volume.

Step2: Rearrange the formula for mass

$m = C\times V$.

Step3: Substitute the given values

$C = 5.5$ mg/mL and $V=15$ mL. So $m=5.5\times15$ mg.

Step4: Calculate the mass

$m = 82.5$ mg.

Answer:

82.5 mg