Final answer:
To provide 2.8 mg of a medication from a 0.4 mg/mL solution, you will need 7 mL of the solution.
Step-by-step explanation:
To solve this problem, we can use the formula C₁V₁ = C₂V₂, where C₁ represents the concentration of the solution, V₁ represents the volume of the solution, C₂ represents the desired concentration, and V₂ represents the desired volume.
This problem states that we have a 0.4 mg/mL solution, and we need to provide 2.8 mg of the medication. Let's plug in the values into the formula and solve for V₁:
0.4 mg/mL x V₁ = 2.8 mg
V₁ = 2.8 mg / 0.4 mg/mL = 7 mL