Chem homework help please?

Question

use dimesional analyst please

Answer 1

1500 cells correspond to 2.54 cm, so 1 cell has the diameter of 2.54/1500 = 0.001693 cm or 1.693*10e-3 cm or 1.693*10e-5 m = 16.93 micrometers

Answer 2

1 inch = 2.54 cm

100 cm = 1 m

1 micrometer = 1 x 10^-6 m

Using dimensional analysis,

1 inch x (2.54 cm / 1 inch) x (1m / 100cm) x (1 micrometer / 1 x 10^-6 m) = 25400 micrometers

Therefore,

1 inch = 25400 micrometers

Next step is to divide the given row length by the number of white blood cells to get the average diameter of each cell.

1 inch / 1500 WBC = 0.000666667 inches

Then, convert inches to micrometers using 1 inch = 25400 micrometers.

0.000666667 inches x (25400 micrometers / 1 inch) = 16.93 micrometers

Answer: 16.93 micrometers