Question

a first order reaction takes 30 minutes for 50% completion calculate the time required for 90% completion of this reaction

Answer 1

Heya!!Here is your answer friend ⤵⤵

Time for 50% = 30 min
Time for 1% = 30/50

Time for for
$\frac{30}{50} \times 90 = \frac{270}{5 } \\ = 54$
Hence it will take 54 minutes to complete 90% reaction.

Hope it helps you ✌✌

Answer 2

a first order reaction takes 30 minutes for 50%

for 1%= 30%/50%

for 90%,

30 ÷50 × 90 =54 minutes

Thus, it will take 54 minutes to complete the reaction

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