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4 November, 14:57

A compound of carbon and bromine contains 6.99% carbon and has a molar mass of 515.4 g/mol. What is the empirical formula of this compound?

CBr2

C2Br

C2Br3

C3Br6

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  1. 4 November, 16:46
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    The answer is the last option. A compound of carbon and bromine contains 6.99% carbon and has a molar mass of 515.4 g/mol. The empirical formula is C3Br6.

    515.4 g/mol (0.0699) = 36.03 g/mol

    The value obtained is the total molar mass of the carbon.

    36.03 g/mol (12.01 g/mol) = 3 Carbon atoms

    From the choices, only the last option has three atoms.
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