A flashlight uses batteries that add up to 4.5 V and has a power output of 0.48 W. (a) How much current is drawn from the batteries? A (b) What is the effective resistance of the flashlight? Ω

Given the following standard electrode potentals: Ag°(aq) + e = Ag(s) E° = 0.80 V N,(g) + 5H¨(aq) + 4e¯ = N,H;(aq) E° =-0.23 V Fe* (aq) + 2e = Fe(s) E° =-0.44 V Which of the reactions is spontaneous? N,(g) + 2Fe(s) + 5H¨(aq) = N,H (aq) + 2Fe²* N,(g) + 4Ag(s) + 5H¨(aq) = N‚H; (aq) + 4Ag* Fe* + 2Ag(s) 2 2Ag*(aq) + Fe(s) None of the above are spontaneous.

How long would it take to electrodeposit all the Cu2+ in 0.300 L of 0.230 M CuSO4 solution with an applied potential difference of 0.275 V and a current of 3.50 amperes? Enter your answer in minutes.

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Suppose a current of 0.950A flows through a copper wire for  86. seconds. Calculate how many moles of electrons travel through the wire. Be sure your answer has the correct unit symbol and round your answer to 2 significant digits.

What mass of gold can be plated onto an object in 7.29 minutes at 6.39 A of current? Au3+(aq) + 3e- → Au(s) Your Answer: Answer units

Half 1(s) Co2" A+(a (1) The strongest oxidizing agent is: enter formula (2) The weakest oxidizing agent is: (3) The weakest reducing agent is: (4) The strongest reducing agent is: (5) Will Al (aq) oxidize I'(aq) to I2(s)? 3+ (6) Which species can be oxidized by Co2*(aq)? If none, leave box blank. Submit Answer Try Another Version 3 item attempts remaining

Standard Reduction (Electrode) Potentials at 25 Half-Cell Reaction * (volts) F2(8) + 2 e2F (aq) 287 Ce* (aq) +e Ce (aq) 1.61 Mn0, (aq) + BH'(aq) +5e Mn"( "(aq) + 4 H20(1) 1.51 Cla(g) +2e -2 C (aq) 1.36 Cr20, (aq) + 14 H'(aq) - 6e2 Cr*"(aq) + 7 H20() 1.33 Oz() + 4 H'(aq) + 4e2 H20(1) 1.229 Br20) + 2 e2 Br (aq) 1.08 NO3 (aq) + 4 H'(aq) + 3eNO(g) + 2 H20() Hg"(aq) 0.96 2 Hg (aq) + 2e 0.920 Hg"(aq) + 2 e- Hg(1) 0.855 Ag (aq) +e Ag(s) 0.799 Hg2" (aq) - 2e-2 Hg(1) 0.789 Fe" (aq) +e Fe"(ag) 0.771 12(s) + 2e 21 (aq) 0.535 Fe(CN)"(aq) + e Fe(CN), (aq) 0.48 Cu (aq) + 2eCu(s) 0.337 Cu"(aq) +e- Cu (aq) 0.153 S(s) + 2 H'(aq) + 2 e H2S(aq) 0.14 2H'(aq) + 2e-H2(8) 0.0000 Pb (aq) + 2e- Ph(s) -0126 Sn (aq) + 2 e Sn(s) -014 Ni (aq) + 2 e- Ni(s) -0.25 Co (aq) + 2 e Co(s) -0.28 "(aq) + 2e Cd(s) -0.403 Cr"(aq) +e "(aq) -041 Fe"(aq) + 2 e Fe(s) -044 Cr"(aq) +3e-Cr(s) -0.74 Zn"(aq) +2 e- Zn(s) -0.763 2 H20() +2e Hz(z) + 2 OH (aq) -0.83 Mn"(aq) + 2e - Mn(s) -1.18 A" (aq) + 3e- Al(s) -1.66 Mg (aq) + 2 e- Mg(s)…

21) Given that the standard reduction potential for O₂(g) + 4H (aq) + 4e → 2 H₂O(1) is +1.229 V, the value of Ecell for O₂(g) + 2 H₂(g) → 2 H₂O(1) at pH 3.00 and all gases at standard pressure (1 bar) is: A) 0.00 V B) +1.229 V C) +1.407 V D) +0.929 V E) +1.051 V

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