How much alumina is formed if #4.2*mol# of aluminum is oxidized?

1 Answer
May 12, 2017

Answer:

Why, #2.1*mol#....................

Explanation:

#2Al(s) +3/2O_2(g) rarr Al_2O_3(s)#

Look at the stoichiometry of the oxide: ONE mole of alumina contains 2 moles of aluminum, and 3 moles of oxygen ATOMS. We have #4.2*mol# of aluminum, burnt in excess oxygen, and thus #2.1*mol# alumina result.