Asked by Austin
                A sample is taken that has 400,000,000 particles in it. If 20 of these particles are a dangerous chemical, what is the concentration of this chemical in parts-per-million (ppm)? 
            
            
        Answers
                    Answered by
            DrBob222
            
    20 parts in 400 million would be 10 parts in 200 million or 1 part in  20 million or 1/20 part in 1 million or 0.05 ppm.
(20*1,000,000/400,000,000) = 0.05 ppm
    
(20*1,000,000/400,000,000) = 0.05 ppm
                                                    There are no AI answers yet. The ability to request AI answers is coming soon!
                                            
                Submit Your Answer
We prioritize human answers over AI answers.
If you are human, and you can answer this question, please submit your answer.