What is the concentration in parts per million of DDT in each of the following?
Part 1 of 2
0.034 mg in 1800. g plankton. Be sure your answer has the correct number of significant figures.
Note: Reference the SI prefixes table for additional information.
ppm DDT
correct significant figure
0.034 mg is equivalent to 0.034 × 10^-3 g.
Concentration of DDT in ppm = (0.034 × 10^-3 g / 1800. g) x 10^6 ppm = 18.9 ppm
Therefore, the concentration of DDT in the plankton sample is 18.9 ppm with the correct number of significant figures.