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Chemical calculator: Difference between revisions
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;Introduction
* A molecule consists of atoms. E.g. water, H2O, has two hydrogen atoms and one oxygen atom
* The mass of H2O is 1.008 * 2 + 15.999 = 18.015
* An atom name consists of one upper-case letter followed by zero, one or two lower-case letters.
** H (
** He (
** Uue (
* The number of atoms is stated behind the atom or atom group
* An atom group is specified using parenthesis. E.g.
* A group may contain other groups, e.g. COOH(C(CH3)2)3CH3
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