What is the lifetime of OH at the sea level, assuming that the following reactions are...

What is the lifetime of OH at the sea level, assuming that the following reactions are the principal sinks for OH in the troposphere. Answer in sec to two significant digits.

OH + CO → CO₂ + H (1)

OH + CH₄ → CH₃ + H₂O (2)

The density of air at the sea level is 2.69 ×10¹⁹ molecules cm^-3, the mixing ratios of CO and CH₄ are 80 ppbv and 1700 ppbv, respectively, and the reaction rate is k_CO= 1.5×10^-13 molecules^-1 cm³ s^-1 for (1) and k_CH4= 2.5×10^-15 molecules^-1 cm³ s^-1 for (2).

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queen_honey_blossom answered 8 months ago

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