Question

What does the formula of a substance tell you ?

Answer 1

chemical formula tells us the number of atoms of each element in a compound it contain the symbol of the atom of the element present in the compound as well as how many there are for each element in the form of subscript

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Answer 2

It's components....like of oxygen it's O2 means 2 compounds of oxygen similarly CO2 means 1 compound of carbon and 2 compounds of oxygen.
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