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25 December, 14:40

A chemical formula is an expression used to represent

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  1. 25 December, 17:00
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    A chemical formula is an expression that shows the elements in a compound and the relative proportions of those elements.

    Explanation:

    If only one atom of a specific type is present, no subscript is used. For atoms that have two or more of a specific type of atom present, a subscript is written after the symbol for that atom
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