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mmend98

  • one year ago

Which of the following is not true about beta emissions? Difference of the atomic number by one between the old element and new element formed Are written as 0-1e Cannot penetrate concrete Less penetrating than alpha emissions

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  1. mmend98
    • one year ago
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    @Preetha

  2. mmend98
    • one year ago
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    @taramgrant0543664

  3. taramgrant0543664
    • one year ago
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    Well which one are you thinking it is? I'll cross one off for you, beta emissions are unable to pass through concrete but it can pass through something like paper.

  4. taramgrant0543664
    • one year ago
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    So it is not C

  5. mmend98
    • one year ago
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    Its asking what it not is. So C would be the answer right?

  6. Zale101
    • one year ago
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    Here's a hint: Beta particles are high speed electrons, travels faster, and are less heavily ionized than alpha particles.

  7. taramgrant0543664
    • one year ago
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    C says cannot penetrate concrete so that's true the question asks what is not true

  8. mmend98
    • one year ago
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    oh lol sorry

  9. mmend98
    • one year ago
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    Thanks Zale it would be D

  10. taramgrant0543664
    • one year ago
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    It's ok!

  11. taramgrant0543664
    • one year ago
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    And yes it would be D

  12. Zale101
    • one year ago
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    Yes it is D. because since beta particles are less heavily ionized then that makes it more penetrating than alpha particles. Alpha particles are thickly ionized and are less penetrating.

  13. mmend98
    • one year ago
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    Given the following chemical equation, how many moles of carbon are necessary to react with 5.52 moles of SO2? 5C(s) + 2SO2 (g) arrow CS2 (l) + 4CO (g) 5.52 moles SO2 2.00 moles SO2 13.8 moles SO2 11.0 moles SO2 this one would be 13.8 right ? because the formula is 5.52molesSO2×5molesC2molesSO2=13.8

  14. Zale101
    • one year ago
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    are you familiar wit mole to mole ratio?

  15. Zale101
    • one year ago
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    with*

  16. mmend98
    • one year ago
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    yea im familiar did i do it right ? thats what im asking lol

  17. Zale101
    • one year ago
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    Yes. Sorry, i did not see it.

  18. mmend98
    • one year ago
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    thats ok mate

  19. mmend98
    • one year ago
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    Fusion refers to the splitting of an atomic nucleus into fragments of roughly the same mass amount. True False

  20. taramgrant0543664
    • one year ago
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    13.8 would be correct

  21. mmend98
    • one year ago
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    Fusion refers to the splitting of an atomic nucleus into fragments of roughly the same mass amount. True False

  22. Zale101
    • one year ago
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    What do you think? True or false? Make any educated guess

  23. Zale101
    • one year ago
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    Search Nuclear Fission and see if it matches the definition.

  24. mmend98
    • one year ago
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    the educated guess i would make is false

  25. mmend98
    • one year ago
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    i just never know with this weird wording tbh

  26. taramgrant0543664
    • one year ago
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    That is referring to fission which is the splitting, fusion is the colliding of atoms

  27. Zale101
    • one year ago
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    Yep. False because what Tara stated above ^

  28. mmend98
    • one year ago
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    Given a solution with a pH of 2.8, what is the [H+] of the solution? 2.8 M 6.31 x 10-12 M 1.58 x 10-3 M 11.2 M

  29. mmend98
    • one year ago
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    this one would be c?

  30. taramgrant0543664
    • one year ago
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    Yes it would be c [H+]=10^-2.8 Which gives c

  31. mmend98
    • one year ago
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    A solution is highly concentrated if there is: a large volume of solution a large amount of solvent and a small amount of solute a large amount of solute and a small amount of solvent a high density value for the solution

  32. mmend98
    • one year ago
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    im confused on this one for some reason tara lol

  33. mmend98
    • one year ago
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    youve been unreal help btw

  34. taramgrant0543664
    • one year ago
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    Well when you think about it volume of solution doesn't matter because it could be at any volume and density value doesn't make sense for it either. Think about the difference between something dilute and something that is concentrated and that will sort out between B and C

  35. mmend98
    • one year ago
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    it would be b

  36. taramgrant0543664
    • one year ago
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    And no problem I enjoy helping and once my SS gets a little higher I am planning on applying for the qualified helper in chemistry so I'm glad to hear that I'm helping!

  37. mmend98
    • one year ago
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    it would be b right ?

  38. taramgrant0543664
    • one year ago
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    dilute: a solution that contains a small proportion of solute relative to solvent concentrated: a solution that contains a large proportion of solute relative to solvent.

  39. mmend98
    • one year ago
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    oh lol its c

  40. mmend98
    • one year ago
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    im dumb af

  41. taramgrant0543664
    • one year ago
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    No you're not it was a little mistake that happens, I've made a lot of mistakes it happens but that's how you learn

  42. mmend98
    • one year ago
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    Calculate the change in freezing point when 116.8 grams of barium chloride are added to 250 grams of water. Kf = 1.86°C/m; Kb = 0.512°C/m -4.17°C -12.5°C -8.35°C 0°C last question im stuck on

  43. taramgrant0543664
    • one year ago
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    ΔT= Kf · m · i So ΔT is the change in temperature that you solve for Kf is given m is the molarity to find this you need to find the moles of barium chloride and you need to convert 250g of water into kg. then you do moles divided by kg of water to find m i is the van't Hoff dissociation factor so BaCl2 dissociates into Ba2+ +2Cl- let me double check this i, I can't quite remember the rule but the rest is right I'll look it up quick

  44. taramgrant0543664
    • one year ago
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    So BaCl2 breaks into Ba2+ and 2Cl- so it breaks into 3 parts so i is 3 but NaCl for example breaks into Na+ and Cl- so i=2

  45. taramgrant0543664
    • one year ago
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    If we put it all together ΔT= Kf · m · i ΔT= (1.86)m(3) so m just needs to be found

  46. mmend98
    • one year ago
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    i got A ?

  47. taramgrant0543664
    • one year ago
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    How did you get a negative? What did you get for m?

  48. mmend98
    • one year ago
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    wait i got D i forgot to multiply one term.

  49. taramgrant0543664
    • one year ago
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    Oh wait it's suppose to be negative don't mind me it's a little late not really thinking for a second there lol

  50. mmend98
    • one year ago
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    then i think it has to be a.\

  51. taramgrant0543664
    • one year ago
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    I got something different what did you get for m?

  52. mmend98
    • one year ago
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    what did u get then ill check mine over

  53. taramgrant0543664
    • one year ago
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    I got 2.24 as my m value

  54. mmend98
    • one year ago
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    i got 5.2

  55. mmend98
    • one year ago
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    idek how

  56. taramgrant0543664
    • one year ago
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    116.8g/ molar mass of BaCl2 (208.233)=0.5609 0.5609/ kg of water so 250/1000 this =2.24

  57. mmend98
    • one year ago
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    i got B

  58. mmend98
    • one year ago
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    yes your correct

  59. taramgrant0543664
    • one year ago
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    Yes B would be correct!

  60. mmend98
    • one year ago
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    Given a solution with a pOH of 13.6, what is the [OH-] of the solution? 13.6 M 2.51 x 10-14 M 0.4 M 3.98 x 10-1 M would be a?

  61. mmend98
    • one year ago
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    im sorry if its too late go ahead and have a great night !! u were amazing

  62. taramgrant0543664
    • one year ago
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    I can check this last one quick for you just give me one sec

  63. mmend98
    • one year ago
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    thanks Tara

  64. taramgrant0543664
    • one year ago
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    pOH=-log[OH-] 13.6=-log[OH-] -13.6=log[OH-] 10^(-13.6)=[OH-] It's not A

  65. mmend98
    • one year ago
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    B is what i got

  66. mmend98
    • one year ago
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    see this is why i ask u ;) haha

  67. taramgrant0543664
    • one year ago
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    Yes B is correct

  68. mmend98
    • one year ago
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    so its 2.51 x 10-14 M ?

  69. mmend98
    • one year ago
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    sweet

  70. taramgrant0543664
    • one year ago
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    Yes it is!

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