You can use mole ratios and molar mass to determine the masses of substances involved in a chemical reaction. using the periodic table, calculate the molar masses of iron oxide (fe2o3) and aluminum oxide (al2o3). give your answer to four significant figures.

Answer : Molar mass of the is 159.7 g/mol.

Molar mass of the is 101.96 g/mol.

Explanation:

Molar mass of :

Molar mass =

Molar mass of the is 159.7 g/mol

Molar mass of :

Molar mass =

Molar mass of the is 101.96 g/mol

The molar mass of Fe2O3 and Al2O3  is 160.0 g/mol and 102.0 g/mol respectively.

The molar mass of a compound is the addition of the molar weights of the individual atoms that make up the compound.

In this case, the molar weight of Fe is 56, O is 16, and Al is 27 g/mol respectively.

Fe2O3 = (56x2) + (16x3)

              = 160.0 g/mol

Al2O3 = (27x2) + (16x3)

            = 102.0 g/mol

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