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anonymous

  • one year ago

A liquid is placed in an evacuated, sealed flask. When will this closed system reach dynamic equilibrium? When all of the liquid has evaporated to form a vapor When liquid and vapor are present but evaporation stops When the rate of evaporation equals the rate of condensation When the volume of liquid equals the volume of vapor

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  1. anonymous
    • one year ago
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    @taramgrant0543664 b?

  2. taramgrant0543664
    • one year ago
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    B makes sense because the rate of condensation is much slower than the rate of evapouration

  3. anonymous
    • one year ago
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    @taramgrant0543664 that was wrong

  4. taramgrant0543664
    • one year ago
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    Wait I didn't really like that answer so I wanted to double check and it should have been c. I assumed that evapouration would get ahead but it stays constant the condensation speeds up to accomidate making the rates equal

  5. anonymous
    • one year ago
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    Two gases are placed in a sealed flask and allowed to react. Which statement is true about the concentrations of the reactants and products when this closed system reaches dynamic equilibrium? They will be equal and constant. They will be equal but continuously changing. They will not necessarily be equal, and they will be continuously changing. They will not necessarily be equal, but they will be constant.

  6. anonymous
    • one year ago
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    this one was wrong too we had picked c

  7. taramgrant0543664
    • one year ago
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    It could've been d

  8. anonymous
    • one year ago
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    it was thanks

  9. anonymous
    • one year ago
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    What is the oxidation number of fluorine (F) in F2? +1 −1 0 −3

  10. anonymous
    • one year ago
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    d?

  11. anonymous
    • one year ago
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    @taramgrant0543664

  12. taramgrant0543664
    • one year ago
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    They should be electrically neutral

  13. taramgrant0543664
    • one year ago
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    When F2 bond to another, the oxidation # on each atom is 0. If oxidation state is maintained at -1, it would lead the molecule to have a net -2 charge. Such oxidation # assignment is inaccurate, since F2 molecules are electrically neutral.

  14. anonymous
    • one year ago
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    so 0 would be correct

  15. taramgrant0543664
    • one year ago
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    Yes

  16. anonymous
    • one year ago
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    Which of the following describes an element that is oxidized in a reaction? It gains electrons during a reaction. It has a decrease in its oxidation number. Al yields Al3+ + 3e− F2 + 2e− yields 2 F−

  17. anonymous
    • one year ago
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    a?

  18. anonymous
    • one year ago
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    @sweetburger

  19. taramgrant0543664
    • one year ago
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    In oxidation you. Lose electrons

  20. anonymous
    • one year ago
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    so b? @taramgrant0543664

  21. taramgrant0543664
    • one year ago
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    C is an oxidation reaction, it's not B because if you lose electrons you become more positive increasing the oxidation number, it's not D as that is a reduction reaction and a is describing the reduction reaction

  22. anonymous
    • one year ago
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    Which of the following chemical reactions is an oxidation-reduction reaction? CuSO4 + BaCl2 yields BaSO4 + CuCl2 AgNO3 + NaCl yields AgCl + NaNO3 Pb(NO3)2 + 2NaCl yields PbCl2 + 2NaNO3 Zn + H2SO4 yields ZnSO4 + H2

  23. anonymous
    • one year ago
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    b? @taramgrant0543664

  24. taramgrant0543664
    • one year ago
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    Check the charges on each element for the product side and reactant side. If any element had a change in its charge, it's an oxidation/reduction reaction. AgNO3 + NaCl --> AgCl + NaNO3 Reactant side: Ag has a charge of +1 N has a charge of + 5 O has a charge of - 2 (-2 * 3 = -6 total) Na has a charge of +1 Cl has a charge of -1 Product side: Ag has a charge of +1 Cl has a charge of -1 Na has a charge of +1 N has a charge of +5 O has a charge of -2 No species in the reaction had a change in charge meaning it's not a reduction/oxidation reaction.

  25. anonymous
    • one year ago
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    so d is corrrect?

  26. taramgrant0543664
    • one year ago
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    Yes D is correct

  27. anonymous
    • one year ago
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    Consider the following reaction: Cl2 + 2NaBr yields 2NaCl + Br2 Which element is oxidized and which is reduced in the reaction? Br is reduced and Na is oxidized. Cl is reduced and Br is oxidized. Cl is reduced and Na is oxidized. Na is reduced and Br is oxidized.

  28. anonymous
    • one year ago
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    a? @taramgrant0543664

  29. taramgrant0543664
    • one year ago
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    Left side Cl -> 0 Na -> +1 Br -> -1 Right side Cl -> -1 Na-> +1 Br-> 0 Lose electrons oxidized, gain electrons reduced

  30. anonymous
    • one year ago
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    so c

  31. taramgrant0543664
    • one year ago
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    Cl is being reduced, but Ana the charge remains the same so it is not being oxidized or reduced

  32. anonymous
    • one year ago
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    B IS CORRECT?

  33. taramgrant0543664
    • one year ago
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    Yes it is B, Br is losing electrons and therefore oxidized

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

  35. anonymous
    • one year ago
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    A? @taramgrant0543664

  36. taramgrant0543664
    • one year ago
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    If it loses electrons it's oxidized, if it gains electrons it's reduced

  37. anonymous
    • one year ago
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    d?

  38. taramgrant0543664
    • one year ago
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    If it was reduced then it should have gained electrons, it does not affect electronegativity

  39. anonymous
    • one year ago
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    b is correct?

  40. taramgrant0543664
    • one year ago
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    Yes

  41. 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

  42. taramgrant0543664
    • one year ago
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    Well we can take out A since the reducing agent donates or loses electrons so if it loses electrons it becomes oxidized. We can also rule out B because the number wouldn't decrease it would increase

  43. taramgrant0543664
    • one year ago
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    D is a redox reaction so c is the only one specifically referring to an element that is being reduced

  44. anonymous
    • one year ago
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    @taramgrant0543664 c is wrong

  45. anonymous
    • one year ago
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    so d should be correct?

  46. taramgrant0543664
    • one year ago
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    I'm pretty sure a and b are wrong so then I guess it must be D

  47. anonymous
    • one year ago
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    ok

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