Question

30 Points! Please Help.

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?

Enter the answer rounded to two decimal points.

Answer 1

40.08 is the answer to your questions

Answer 2

Answer: The mass of 1 mole of
`Al_2O_3` is 101.96 amu.

Step-by-step 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* 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* 26.98)+(3* 16.00)]` = 101.96 amu

Hence, the mass of 1 mole of
`Al_2O_3` is 101.96 amu.