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The rate constant for the first order decomposition of 'A' at 500 degrees celcius is 9.2x10^-3...

The rate constant for the first order decomposition of 'A' at 500 degrees celcius is 9.2x10^-3 S^-1. How long will it take for 90.8% of a 0.500 M sample of 'A' to decompose?

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