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Homework Help: Compound and molecule?

  1. Jun 22, 2006 #1
    Only 3 statements are correct.
    A.) Water is a compound and exist as molecules at rtp.
    B.) Magnesium chloride is a molecule but not a compound.
    C.) At rtp, nitrogen exist as diatomic molecules.
    D.) Rubidium Oxide is a compound but not considered a molecule.
    E.) Oxygen gas is classified as a compound as it is composed of molecules at rtp.

    pick out 3 correct statements. i pick A, C and E.
    am i correct?

    what's the different between compound and molecule?

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

    Hootenanny

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    Yes, you are correct.
    What do think the difference is? How do you define a compound? How do you define a molecule?
     
  4. Jun 22, 2006 #3
    molecule is two or more atom together.
    then, compound is consist of atoms of two or more different elements?
     
  5. Jun 22, 2006 #4

    Hootenanny

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    Yes, two or more atoms chemically bonded together
    This is the defintion of a mixture, to make it the defintion of a compound to need to add the words "with a fixed ratio determining the composition"
     
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