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Homework Help: Elements, Compounds and Mixture

  1. Jun 22, 2006 #1
    Which 2 groups of substances below contain 1 element, 1 compound and 1 mixture? pick 2 groups.

    A.) Gold, sodium chloride, steel
    B.) oxygen, iodine, air
    C.) methane, iron(III)chloride, sea-water
    D.) Helium, carbon(IV) oxide, mixed dessert
    E.) Bronze, stainless steel, nitrogen(IV)oxide

    i pick B and D. can sombody correct me?
    what is STEEL under? mixture? :confused:

    thanks lotsa.:smile:
     
  2. jcsd
  3. Jun 22, 2006 #2

    Hootenanny

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    You may want to think again, B has two elements and one mixture. D is correct.
     
    Last edited: Jun 22, 2006
  4. Jun 22, 2006 #3
    how about sodium chloride?

    is sodium chloride a mixture?
    bronze is also a compound right?

    then my ans should be A and D. is that correct? :smile:
     
  5. Jun 22, 2006 #4

    Hootenanny

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    :eek: :eek: :eek: Sodium chloride is an ionic.....
     
  6. Jun 22, 2006 #5
    sodium chloride is an ionic compound.
    stainless steel is alloy so it's a compound?
    how about Bronze? nitrogen oxide is a compound.
     
  7. Jun 22, 2006 #6

    Hootenanny

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    Yup.
    Yup
    Bronze is an alloy, and thus is a compound.
    Yup
     
  8. Jun 22, 2006 #7
    ok. thanks. but to pick out 2 groups which contain 1 element, 1 compound and 1 mixture. so i should pick D and which one?
    A.) gold, sodium chloride, steel. ( there's only one element. no mixture.)
    B.) oxygen,iodine , air ( 2 elements. 1 mixture.)
    C.) methane, iron(III)chloride, sea-water. (there's 2 mixture. 1 compound.)
    E.) bronze, stainless steel, nitrogen(IV)oxide (3 compounds.)

    ???
     
  9. Jun 22, 2006 #8

    Hootenanny

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    One of them is a compound.
     
  10. Jun 22, 2006 #9
    methane and sodium chloride both are compound.
     
  11. Jun 22, 2006 #10

    Hootenanny

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    My apologies, after further research it appears that alloys are mixtures not compounds as they donot have a definite make up.
     
  12. Jun 22, 2006 #11
    i see. okok. so steel, stainless steel and bronze are all mixtures?
    so A and D is the answer.?
     
  13. Jun 22, 2006 #12

    Hootenanny

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    Yes, I would agree with you there, again apologies for the confusion, its a while since I have done anything like this :blushing:
     
  14. Jun 22, 2006 #13
    it's okay. thanks lotsa. :biggrin:
     
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