Question

if i want to make 400 ul of a 1% red dye 40 solution, how much red dye 40 * 1 point would i include.
100 ul
40 ul
4 ul
10 ul

Explanation:

Step1: Identify the formula

Use the formula: Amount of solute = Percentage of solute×Volume of solution.

Step2: Convert percentage to decimal

1% is 0.01 in decimal form.

Step3: Calculate the amount of red - dye 40

Amount of red - dye 40 = 0.01×400 $\mu$l = 4 $\mu$l

Answer:

C. 4 ul