Question

Question 10. Bacterial density in a counting chamber A scientist needs to calculate the density of a bacterial culture in order to set up an experiment, but the laboratory spectrophotometer is broken and the only alternative is to use a counting chamber that she finds in a drawer of old equipment. The counting chamber has a glass to coverslip height of 0.02 mm and the instructions say that each square of the chamber measures 10 um x 10 um. She counts bacteria in 5 squares. The 5 squares contain 264, 287, 240, 267 and 251 bacteria. A. What is the volume of liquid corresponding to one square in um??