If anyone is good at chemistry.....

Discussion in 'Off Topic Forum' started by Hahn24, Jul 29, 2010.

  1. Hahn24

    Hahn24 Member

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    Hey everyone, im taking a summer chem class and im doing some hw right now and im really struggling on 2 problems so i thought id ask if anyone is good at chemistry they could try to help me out!:)

    1.Consider the following equation:
    N2 + 3 H2 ® 2 NH3

    How many moles of hydrogen are required to react with 3.4 moles of nitrogen to form ammonia fertilizer?
    - 3.4 moles hydrogen
    - 10.2 moles hydrogen
    - 1.13 moles hydrogen
    - not enough information is given

    2.Which of the following substances does not contain any covalent bonds?
    - Mg(PO4)2 (Magnesium phosphate)
    - NaHCO3 (baking soda)
    - NaBr (Sodium bromide)
    - NaNO3 (sodium nitrate)
     
  2. Backnblack

    Backnblack Premium Member
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    I want to say #1 is 10.2 (3.2? to 1)
    #2 is baking soda (it's a powder)

    I have not had chemistry in 20 yrs....lol
     
  3. superkeest

    superkeest Member

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    is there a text book for the course?
     
  4. That_Guy™

    That_Guy™ New Member

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    Agree that #1 is 10.2
    Ratio of N to H is 2:6 or 1:3
    3.4 x 3 = 10.2

    #2 Sodium Bromide
    NaBr is a salt with an IONIC bond
     
  5. mek_man

    mek_man New Member

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    That_Guy is correct on both accounts..
     
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