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
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
0.015 mg/m = 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