if moles of oxygen combine with
to form
, then the weight of
used in the reaction is (Al = 27 g/mol)
27g
54g
49.5g
31g
The balanced reaction is given as
Now, according to reaction stoichiometry
3 moles of react with 4 moles of
1.5 moles of
will react with 2 moles of
Weight of Al will be = 27 X 2 = 54 g