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    Percent by mass composition

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    While chlorofluorocarbons (CFC) are compounds that seem incredibly useful in industry, they also seem to wreak havoc on the ozone layer. If CFC-211 has a percentage by mass of chlorine of 80.46% and carbon of 10.90%, the rest being fluorine, what is the likely formula for CFC-211?

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    https://brainmass.com/chemistry/stoichiometry/percent-by-mass-composition-102939

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    In chemistry, you can never compare the masses of two different compounds, nor two different elements in a quantitative manner, you must compare them on a mole to mole basis.

    In these types of questions, you need to take an imaginary 100 grams of the compound.

    In that 100 ...

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