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  1. 1 mole of any substance contain Avagadro's number (6.023 x 10^23) of atoms/molecules, you should be able to use that information to answer b) number of moles = mass/molecular mass, you should be able to use this formula to answer c) and d)

    4 Answers · Science & Mathematics · 19/03/2011

  2. ... IIIA elements have 3 valence electrons. Group IVA elements have 4 valence electrons. etc ... Chlorine...

    2 Answers · Science & Mathematics · 05/07/2009

  3. ... then IIA. Next memorize the right, learning IIIA, IVA, VA, VIA, VIIA, and VIII in sequence. Next learn...

    3 Answers · Science & Mathematics · 05/03/2007

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