Calculating Particulate Matter Concentration in PPM
The concentration of suspended particulate matter in a sample of urban air is 50 μg/m³. Given that the density of air is approximately 1.2 kg/m³, what is the approximate concentration of the particulate matter in parts per million (ppm) by mass? (1 kg = 1,000 g)
A
Approximately 0.42 ppm
B
Approximately 42 ppm
C
Approximately 0.042 ppm
D
Approximately 4.2 ppm
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