What is the molar ratio for the chemical reaction #Al + O_2 -> Al_2O_3#?

1 Answer
R V SUBBARAO
Dec 20, 2015

Aluminum to oxygen is 0.666

Explanation:

Balance the equation

4Al + #3O_2 rarr 2Al_2O3#

In the reactant side 4 Al reacts with six oxygen atoms to for two molecules of #Al_2O_3#

Mole ratio Al to oxygen = No of atoms of Al in #Al_2O_3##-:# No of atoms of Oxygen in #Al_2O_3#

Hence Al to O2 mole ratio 2#-:#3 = 0.666

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