The decomposition of N2O5 in solution in carbon tetrachloride is a first-order reaction. 2N2O5 → 4NO2 + O2 The rate constant at a given temperature is found to be 5.25 x 10-4 s-1. If the initial concentration of N2O5 is 0.25 M, what is its concentration after exactly 6 minutes have passed?   Round your answer to 2 decimal places.

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