Question

Suppose a sample of polluted water has a concentration of impurities of 330 ppm. If a filter removes exactly 90% of the impurities, what is the concentration of impurities in the filtered water? concentration: delete FoHK v BNM ? ? cmd option

Answer 1

The concentration of impurities in the filtered water is 33 ppm.

Step-by-step explanation:

Initially, the concentration of impurities is 330 ppm. If the filter removes 90% of impurities, then only 10% of the original impurities remain in the filtered water. Therefore, their concentration will be 10% of 330 ppm, that is, 33 ppm.