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Class 9th ch-3 science❤️
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3) A chemical formula identifies each constituent element by its chemical symbol and indicates the proportionate number of atoms of each element.
4) Atoms present in H2S molecule is 3.
Atom present in PO43- is 5.
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(v) Caco3 : calcium carbonate
(3) chemical Formula is a Formula which helps in identify the chemical element
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