Homework Answers
Formula for rate constant(k) of 1st order reaction is
k = 2.303/t log[Initial conc]0 /[Final conc]
Data — k =0.650 s-1
Initial conc = 0.980M
Final conc = 0.280M
Time. = ?
solution — Substituing vaules in above expression
t = 2.303/0.650 log [0.980]/ [0.280]
= 1.92 seconds ( answer)
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