Kinetics Homework Help: N2O5 Decomposition @ 70°C

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The discussion focuses on calculating the remaining amount of N2O5 after 2.5 minutes given its first-order rate constant of 6.82x10-3 s-1. The initial concentration is 25 mmol in a 2L volume. Participants suggest using the first-order kinetics formula, which involves the rate constant and time to determine the concentration at a specific time. The problem emphasizes understanding the application of kinetics in chemical reactions. Clear guidance on the formula and calculations is sought to solve the problem effectively.
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Hi everyone

I need some help with this problem -

The first order rate constant for the decomposition of N2O5 at 70 degrees celsius is 6.82x10-3 s-1

2N2O5 -> 4NO2 +O2

Suppose we start with 25 mmol of N2O5 in a volume of 2L. How many mmol of N2O5 will remain after 2.5 min?

I'm not sure about what formula I should be using for this. Any help would be appreciated :)
 
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