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Concentration of N2O5 from the rate and the first order rate constant

The same question, asked 2 times: 4 May 2023 S2*, 16 Apr 2026 S1. Every wording below, oldest first.

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  1. Question 1

    4 May 2023 S2

    83
    For the reaction 2N2O5(g)→4NO2(g)+O2(g)2N_2O_5(g)\rightarrow 4NO_2(g)+O_2(g), rate and rate constant are 1.02×10−41.02\times10^{-4} mol L⁻¹ s⁻¹ and 3.4×10−53.4\times10^{-5} s⁻¹. What is the conc. of N₂O₅?

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  2. Question 2

    16 Apr 2026 S1

    31
    The rate constant for the reaction 2N2O5→4NO2+O2\mathrm{2N_2O_5 \rightarrow 4NO_2 + O_2} is 3.0×10−5 s−13.0 \times 10^{-5}\ \mathrm{s^{-1}}. If the rate is 2.4×10−52.4 \times 10^{-5} mole L−1 s−1\mathrm{L^{-1}\,s^{-1}} then the concentration of N2O5\mathrm{N_2O_5} (mol L−1\mathrm{L^{-1}}) is

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