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torisob [31]
3 years ago
7

calculate the atomic mass of carbon if the two common isotopes of carbon have masses of 12.000 amu (98.89% abundance) and 13.003

amu (1.11% abundance)
Chemistry
1 answer:
Bingel [31]3 years ago
6 0

12.01 amu

Work:

(12.000 × .9889) + (13.003 × .0111) = 12.01

  • turn the precents into decimals

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<h3>Empirical formula </h3>

To calculate the empirical formula of a compound, the value of moles of each element is needed.

As we have the information of the mass value, we will use the molar mass expression, which corresponds to:

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As the value of the empirical formula must be an integer, simply multiply the two values ​​by a common factor:

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