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For the First-Order Reaction 2N2O5 →\rarr 2N2O4 + O2 at a Particular Temperature, the Half-Life of a Particular

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For the first-order reaction 2N2O5 →\rarr 2N2O4 + O2 at a particular temperature, the half-life of N2O5 is 0.90 hr.What fraction of the initial concentration of N2O5 will remain after 2.4 hours?

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