Question

Iron forms rust, expressed as: Fe2O3. Using information from the Periodic Table, what is the mass of one mole of Fe2O3?

Answer 1

The answer is C, 159.70g

Answer 2

Answer:

The correct answer is option C.

Explanation:

Atomic mass of iron =  55.845 g/mol

Atomic mass of oxygen = 15.999 g/mol

Mass of 1 mole of iron(III) oxide , $Fe_2O_3$:

$2\times 55.845 g/mol+3\times 15.999 g/mol=159.687 g/mol$

159.687 g/mol ≈ 159.70 g/mol

159.70 g/mol is the mass of one mole of iron(III) oxide.