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Answer on Physical Chemistry Question for yelona

Question #11489
75percent of a first order reaction was completed in 32 minutes.when was 50percent of the reaction completed?
Expert's answer
v=
dC/dt.
v=const
v1=v2
v1=dC1/dt1
v2=dC2/dt2
dC1/dt1=dC2/dt2
(75)/32=(50)/x
2.34375=50/x
2.34375x=50
x=21.33
min

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