Answer to Question #160607 in General Chemistry for Avery

Question

What is the mass of 8.83 x 10²³ formula units of Iron (III) oxide Fe₂O₃?

How would I solve this step by step and get the correct answer??

Answer 1

1 mole of a substance = Avogadro's number of units = 6.02214086x10²³ formula units

Now, how many moles will have 8.83x10²³ formula units

$\implies$ $\dfrac{1x8.83x10^23}{6.02214086x10^23} = 1.466 moles of Fe2O3$

Since the Molar Mass of Fe₂O₃ = 162.2g/mol

Mass of Fe₂O₃ = Moles of Fe₂O₃ x MM of Fe₂O₃

= 1.466moles x 162.2g/mol

= 237.827g