Final answer:
To convert air pollutant concentrations from ppb to ug/m or vice versa, used conversion factors. For example, 30 ppb O3 is equal to 30 ug/m3 O3 under given conditions.
Step-by-step explanation:
To convert air pollutant concentrations from parts per billion (ppb) to micrograms per cubic meter (µg/m³) or vice versa, we need to use conversion factors. The conversion factor for ppb to µg/m³ is:
1 ppb = 1 µg/m³ (under the given conditions of p = 850 bars and T = 270 K)
Using this conversion factor:
a) 30 ppb O₃ = 30 µg/m³ O₃ (under the given conditions)
For the conversion from µg/m³ to ppb:
b) 1000 µg/m³ CH₄ = 1000 ppb CH₄ (under the given conditions)