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Extra Credit 33

  • Page ID
    83266
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    Q17.5.1

    An electric battery is safe to use and has a constant voltage with high current output.

    Q12.1.6

    Rate=-Δ[Br-]/5Δt

    =-Δ[BrO3-]/Δt

    =-Δ[H+]/6Δt

    =Δ[Br2]/3Δt

    rate=-[Br-]/5Δt

    =Δ[Br2]/3Δt

    so, Δ[Br2]/ Δt=2.1*10^(-4) Ms^(-1)

    Q12.5.5

    -Ea/R=ln(k) vs. 1/T

    Q21.3.8

    Moles of N2=100gC*(1 molC/12gC)*(1 molN2/1 molC)=8.33 molN2

    PV=nRT

    (1atm)(V)=(8.33 molN2)(0.008206 L*atm/(mol*k))(273K)

    V=18.66 L of N2 gas

    Q20.2.4

    Oxidized is when an atom loses electrons. Reduced is when an atom gains electrons.

    Example: CH4+O2H2O+CO2

    Q20.4.23

    E°cell=E°cathode-E°anode=0.54--0.76=1.30V

    Q20.9.8

    Cu2+ +2e- Cu

    5.12A*1.5 h*(3600s/1h)*(1 mol e-/96485C)*(1 mol Cu(NO3)2/2 mol e-)*(1 mol Cu/1 mol Cu(NO3)2)*(63.546 g Cu/1 mol Cu)=9.105 g of Cu

    Q14.6.6

    The second step determines the rate constant of the overall reaction because this is the slowest step (requires a lot of energy to react).


    Extra Credit 33 is shared under a CC BY-NC-SA 4.0 license and was authored, remixed, and/or curated by LibreTexts.

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