You are given a vial of ampicillin that is labeled as a 1% solution and told that you need to make 40 plates using this solution. Assuming that you will need 25 mL , what volume of LB agar solution should you make to prepare the 40 plates? What volume of the 1% ampicillin solution do you need to add to this volume of LB agar if the final concentration of ampicillin in the plates should be 50 ug/mL. Hint” Percentage is an express of weight of solute per volume of solution.
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