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If Aluminum has an atomic number of 13 and an atomic mass of 26.98 and Oxygen has an atomic number of 8 and an atomic mass of 16.00, then what is the mass of one mole of Al2O3?


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338024kat

40.08 is the answer to your questions

Answer: The mass of 1 mole of \(Al_2O_3\) is 101.96 amu.

Explanation:

\(Al_2O_3\) is a compound. One mole of a compound has a mass which is equal to the molecular weight (molar mass) of the compound expressed in 'amu' and it contains \(6.022\times 10{23}\) molecules of that compound.

To calculate the molar mass of the compound, we multiply the number of atoms of an element with its atomic mass. Molar mass of \(Al_2O_3\) will be:

Atomic mass of Aluminium = 26.98 amu

Number of atoms of Aluminium = 2

Atomic mass of Oxygen = 16.00 amu

Number of atoms of Oxygen = 3

Molecular weight of \(Al_2O_3\) = \([(2\times 26.98)+(3\times 16.00)]\) = 101.96 amu

Hence, the mass of 1 mole of \(Al_2O_3\) is 101.96 amu.

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