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COMPOUNDS 5.9 - Information in a Chemical Formula 5.9.1 - Number Ratio of the Atoms A chemical formula gives the number ratio of the different kinds of atoms present in the compound. This means that the ratios are the same if you count in individual atoms, dozens of atoms, or moles of atoms. We will be covering the mole concept in details in section 7.2. Take a look at the ratio of the number of atoms in sodium carbonate, Na2CO3.
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Section 6.9 
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