Question

1. find the mass in grams of agarose to prepare a 1.0% agarose in 40 ml of 1x tae buffer.

Explanation:

Step1: Recall percentage - mass formula

Percent - mass ($\%$)=$\frac{\text{mass of solute}}{\text{volume of solution}}\times100$

Step2: Rearrange the formula for mass

Mass of solute = $\frac{\% \times\text{volume of solution}}{100}$

Step3: Substitute values

Given $\% = 1.0$, volume of solution = 40 mL. Mass of agarose=$\frac{1.0\times40}{100}=0.4$ g

Answer:

0.4 g