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For the gas-phase reaction 2 NO2 + F2 → 2NO2F, the rate constant k is 38 M-1s-1 at 27° C. The reaction is first order in NO2 and first order in F2. If 2.00 moles of NO2 are mixed with 3.00 moles of F2 in a 400 L reaction vessel, how many moles of NO2F will be present after 10.0 s?

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