Show Work Methyl chloroform (CH3CCI3) and OH react with a rate constant (kOH) of 9.5×10-15 cm3 molecule-1 s-1 at 298K. 1) If you assume [OH] = 1.00×106 molecules cm3, what is the lifetime of the compound in years? (Find in seconds and then convert to minutes, then hours, then days, then years; 1 year = 365.25 days) 2) Assume, the average methyl chloroform mixing ratio is 250 pptv and no more is emitted into the atmosphere. If this phase-out happened today, how many pptv will be left in 5 years? - You can use 1 pptv = 2.46x107 molecules/cm3 (but you don't need to) %3D 3) How long will in take (in years) to get to only 25 pptv of the compound? - You will use the same equation you used for #2 but now you know the initial concentration, the final concentration, and the lifetime. Find the t.

Chemistry for Engineering Students
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Author:Lawrence S. Brown, Tom Holme
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Chapter11: Chemical Kinetics
Section: Chapter Questions
Problem 11.41PAE: 11.41 For a drug to be effective in treating an illness, its levels in the bloodstream must be...
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Methyl chloroform (CH3CCI3) and OH react with a rate constant (kOH) of 9.5×10-15 cm3 molecule-1 s1 at
298K.
1) If you assume [OH] = 1.00x106 molecules cm3, what is the lifetime of the compound in years?
(Find in seconds and then convert to minutes, then hours, then days, then years; 1 year = 365.25 days)
2) Assume, the average methyl chloroform mixing ratio is 250 pptv and no more is emitted into the atmosphere.
If this phase-out happened today, how many pptv will be left in 5 years?
- You can use 1 pptv = 2.46x10' molecules/cm3 (but you don't need to)
3) How long will in take (in years) to get to only 25 pptv of the compound?
- You will use the same equation you used for #2 but now you know the initial concentration, the final
concentration, and the lifetime. Find the t.
Transcribed Image Text:answer #3 Show Work Methyl chloroform (CH3CCI3) and OH react with a rate constant (kOH) of 9.5×10-15 cm3 molecule-1 s1 at 298K. 1) If you assume [OH] = 1.00x106 molecules cm3, what is the lifetime of the compound in years? (Find in seconds and then convert to minutes, then hours, then days, then years; 1 year = 365.25 days) 2) Assume, the average methyl chloroform mixing ratio is 250 pptv and no more is emitted into the atmosphere. If this phase-out happened today, how many pptv will be left in 5 years? - You can use 1 pptv = 2.46x10' molecules/cm3 (but you don't need to) 3) How long will in take (in years) to get to only 25 pptv of the compound? - You will use the same equation you used for #2 but now you know the initial concentration, the final concentration, and the lifetime. Find the t.
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