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anonymous

  • one year ago

Which of the following chemical reactions is an oxidation-reduction reaction? CuSO4 + BaCl2 yields BaSO4 + CuCl2 Pb(NO3)2 + 2NaCl yields PbCl2 + 2NaNO3 N2 + 3H2 yields 2NH3 K2SO4 + BaCl2 yields BaSO4 + 2KCl

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  1. anonymous
    • one year ago
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    Put on the ox number by the following rules: http://www.dummies.com/how-to/content/rules-for-assigning-oxidation-numbers-to-elements.html Element which get change in ox.n. are or ox or red. Whan you had a raction containing ox and red atoms, its a red-ox

  2. anonymous
    • one year ago
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    @taramgrant0543664 would c be correct?

  3. taramgrant0543664
    • one year ago
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    Yes c would be correct

  4. anonymous
    • one year ago
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    What is true of an element that was oxidized in a chemical reaction? It lost electrons. It gained electrons. It increased electronegativity. It decreased electronegativity.

  5. anonymous
    • one year ago
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    would b be correct @taramgrant0543664 ?

  6. taramgrant0543664
    • one year ago
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    Lose electrons oxidized, gain electrons reduced

  7. anonymous
    • one year ago
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    so a would be correct @taramgrant0543664

  8. taramgrant0543664
    • one year ago
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    Yes a would be correct

  9. anonymous
    • one year ago
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    What is the oxidation number of oxygen (O) in O2? 0 +2 −2 +4

  10. anonymous
    • one year ago
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    would b be correct @taramgrant0543664

  11. anonymous
    • one year ago
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    Rule 1: The oxidation number of an element in its free (uncombined) state is zero — for example, Al(s) or Zn(s). This is also true for elements found in nature as diatomic (two-atom) elements

  12. anonymous
    • one year ago
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    so @Bozhena b would be wrong

  13. anonymous
    • one year ago
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    yes, b is wrong

  14. taramgrant0543664
    • one year ago
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    It's electrically neutral just like we did with F2

  15. anonymous
    • one year ago
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    so a would be right?

  16. taramgrant0543664
    • one year ago
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    It would be a since it would become neutral

  17. anonymous
    • one year ago
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    Which of the following describes an element that is reduced in a reaction? It acts in the reactant that is the reducing agent. It has a decrease in its oxidation number. Cd yields Cd2+ + 2e− Zn + Cu2+ yields Zn2+ + Cu

  18. anonymous
    • one year ago
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    for c and d are both incorrect ithink

  19. taramgrant0543664
    • one year ago
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    Gaining electrons is reduced and therefore the oxidation number would become more negative so there would be a decrease in oxidation number

  20. anonymous
    • one year ago
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    so b is correct

  21. taramgrant0543664
    • one year ago
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    Yes it would be

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