25 mL of a growth medium containing bacteria at a concentration of 3 * 10⁵ cells per litre is diluted to a volume of 0.05 L. What is the concentration of bacteria after dilution? A) 1.5 * 10⁶ cells L^-1 B) 1.75 * 10⁸ cells L^-1 C) 6.7 * 10^-6 cells L^-1 D) 6 * 10⁵ cells L^-1 E) 1.5* 10⁵ cells L^-1

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Quizplus · Accepted Answer

The initial concentration is 3 x 10^5 cells/L. The initial volume is 0.025 L, and the final volume is 0.05 L. Using the dilution formula (C1V1 = C2V2), the concentration after dilution is (3 x 10^5 cells/L) * (0.025 L) / (0.05 L) = 1.5 x 10^5 cells/L.

25 ML of a Growth Medium Containing Bacteria at a Concentration