Calculate t99.9% / t75% for a first order reaction
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t99.9= ln(100/100-99.9)/k= ln(1000)/k
= 2.303*3/k
t75= ln(100/100-75)/k = ln(4)/k= 2.303*log(4)/k
= 2.303* 2*0.3010/k
t99/t75= 3/0.6020= 5
t99 = 5 * t75
= 2.303*3/k
t75= ln(100/100-75)/k = ln(4)/k= 2.303*log(4)/k
= 2.303* 2*0.3010/k
t99/t75= 3/0.6020= 5
t99 = 5 * t75
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