Answer :
use dimensional analysis.
first, you put 29.8 mole of Al at the top.
And, in the next column you put 2 mole of Al2O3 at the top and 4 mole of Al at the bottom.
Then, you multiply 29.8 and 2 and then divide by 4. that will give you the answer 14.9 mole of Al2O3.
first, you put 29.8 mole of Al at the top.
And, in the next column you put 2 mole of Al2O3 at the top and 4 mole of Al at the bottom.
Then, you multiply 29.8 and 2 and then divide by 4. that will give you the answer 14.9 mole of Al2O3.