EXAM 4A - CHEMISTRY 110 PRACTICE FINAL EXAM 4A

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Unformatted text preview: CHEMISTRY 110 PRACTICE FINAL EXAM 4A --------------------------------------------------------------------------------- 1. Given the following reaction which of the following statements is true? Fe(s) + CuCl 2 (aq) Cu(s) + FeCl 2 (aq) A. Iron is oxidized and copper is reduced. B. Iron is reduced and copper is oxidized. C. Copper is reduced and chlorine is oxidized. D. Chlorine is the oxidizing agent. E. Iron is oxidized and chlorine is reduced. --------------------------------------------------------------------------------- 2. Consider the following two reactions. What will be the value of K c1 / K c2 ? K c1 2 A 4 B K c2 A 2 B A. K c1 B. K c2 C. 1/ K C1 D. 1/ K C2 E. It is impossible to determine that value. --------------------------------------------------------------------------------- 3. A hot air balloon holds a volume of 2.83 10 6 L of gas. If the gas temperature inside the balloon is 120 C at 1.0 atm pressure, what mass of helium gas will be needed to inflate the balloon to full capacity? A. 87.7 kg B. 287 kg C. 301 kg D. 351 kg E. 553 kg --------------------------------------------------------------------------------- --------------------------------------------------------------------------------- 4. What is the frequency of electromagnetic radiation with wavelength 532 nm? A. 5.64 10 14 s 1 B. 6.48 10 12 s 1 C. 4.18 10 18 s 1 D. 6.23 10 14 s 1 E. 3.75 10 15 s 1--------------------------------------------------------------------------------- 5. What is the maximum number of electrons in aluminum (Al) that can have a spin quantum number with a value of m s = 1/2? Assume aluminum is in its ground state. A. 6 B. 7 C. 9 D. 11 E. 13 --------------------------------------------------------------------------------- 6. Which of the following photons contains enough energy to break a CBr bond? (The C-Br bond enthalpy is 276 kJ/mol.) i. One 330 nm photon ii. One 430 nm photon iii. One 530 nm photon iv. One 4.30 10 5 nm photon v. One 5.30 10 5 nm photon A. i only B. i and ii only C. i, ii, and iii only D. i, ii, iii, and iv only E. All five photons have enough energy --------------------------------------------------------------------------------- --------------------------------------------------------------------------------- 7. Which of the following graphs shows an equilibrium being established between two species, A and B? A. B. C. D. E. --------------------------------------------------------------------------------- 8. What is the approximate enthalpy change during the following reaction based on the given bond enthalpies? 2 HCl(g) + F 2 (g) 2 HF(g) + Cl 2 (g) H o = ? Bond Bond Dissociation Energy HCl 431 kJ/mol FF 155 kJ/mol HF 567 kJ/mol ClCl 242 kJ/mol A. 359 kJ B. +359 kJ C. + 1395 kJ D. 2393 kJ E. + 2393 kJ --------------------------------------------------------------------------------- ---------------------------------------------------------------------------------...
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EXAM 4A - CHEMISTRY 110 PRACTICE FINAL EXAM 4A

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