Saturday, 30 March 2013

1.17 understand the use of the term mole to represent the amount of substance

A mole is an amount, in the same way that you can have a dozen buns, you can have a mole of carbon.
Having a mole of something is having 6.022x1023 of it.

n.b the 1023 thing is meant to be 10 to the power of 23.

7 comments:

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  2. So are there 12 moles in 1 carbon atom?

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    Replies
    1. Not quite, the dozen thing was to say that its a name for a number.
      So 1 carbon atom is a fraction of a mole: 1/6.022x10(23).
      If you had 6.022x10(23) carbon atoms, then you would have one mole.

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  4. A mole is a name given to represent an amount of substance;
    1 mole = 6.02x10^23 particles
    (Avogadro’s number - the term mole is the Avogadro number of particles (atoms, molecules, formulae, ions or electrons) in a substance).
    Abbreviated to mol.

    The RAM of any element in grams contains 1 mol of atoms of that element. (For example, 12g of carbon = 1 mol).

    The Mr of a compound in grams contains 1 mol of that compound. (For example, 18g of water = 1 mol, Mr of water is 16+1+1)

    This is what our teach gave us, word for word. :)

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  5. A mole is a name given to represent an amount of substance;
    1 mole = 6.02x10^23 particles
    (Avogadro’s number - the term mole is the Avogadro number of particles (atoms, molecules, formulae, ions or electrons) in a substance).
    Abbreviated to mol.

    The RAM of any element in grams contains 1 mol of atoms of that element. (For example, 12g of carbon = 1 mol).

    The Mr of a compound in grams contains 1 mol of that compound. (For example, 18g of water = 1 mol, Mr of water is 16+1+1)

    This is what our teach gave us, word for word. :)

    ReplyDelete
  6. The Chemistry Syllabus has changed…

    Here is a New blog for the 2017 Syllabus:

    https://igcse-chemistry-2017.blogspot.hk/

    ReplyDelete