Aluminum oxide contains 53% of Al. How much oxygen combines with 26.5g of aluminium to form aluminium oxide?

Question

Thank you

Answer 1

Let x = mass
Al2O3, then
0.53*x = 26.5
x = ? = mass Al2O3 and
?-mass Al = mass O.

I get 50 g for mass Al2O3 and 23.5 = mass O2.