# chemistry

If the half-life of a first-order decomposition reaction is 24.2 minutes, how long will it take for 10.0 moles of the reactant to decompose so that only 2.5 mol remains?

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1. k = 0.693/t1/2
ln(No/N) = kt
No = 10.0
N = 2.50
K from above.
Solve for t in minutes.

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2. test

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3. ettgd

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4. 36.3

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