Answered Essay: Average ozone concentrations in Jakarta, Indonesia have been reported to be .015 mg/m^3

Average ozone concentrations in Jakarta, Indonesia have been reported to be .015 mg/m^3 and in Tokyo, Japan are 20 ppbv. What is the approximate ratio of these two values when expressed in the same units?

Expert Answer


We know that relation b/w ppm and mg/l is :-

1 ppm = 1 mg/l (ppm = parts per million)

but we have given the concentration in mg/m^{3}

0.015 mg/m^{3} = 0.015/1000 mg/l = 0.000015 mg/l = 0.000015 ppm

and we also know that –

1 ppm = 1000 ppb (ppb = parts per billion)

so converting 0.000015 ppm to ppb :-

0.000015 ppm = 0.000015*1000 = 0.015 ppb

hence the ratio of these concentrations are = 0.015/20 = 0.00075

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