what is a chemical formula? ? ?
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A chemical formula is a notation used by scientists to show the number and type of atoms present in a molecule, using the atomic symbols and numerical subscripts. ... A chemical formula describes a substance, down to the exact atoms which make it up.
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The chemical formula of a compound is a symbolic representation of its chemical composition. ... For example, the chemical formula of water, which is H2O, suggests that two hydrogen atoms combine with one oxygen atom to form one molecule of water.
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