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The substance Q decomposes into products in a closed reactor at a temperature of 500K. In 36 minutes and 30 seconds, 60% of Q originally

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The substance Q decomposes into products in a closed reactor at a temperature of 500K. In 36 minutes and 30 seconds, 60% of Q originally present remains in the reactor. Calculate the time required to react 84% of Q if the reaction is (a) first (b) zero order

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