Question

calculate the mass percentage of oxygen in Al2O3

Answer 1

Atomic mass of oxygen - 16 
3 oxygen mass = 48 
molecular mass of Al2O3 = 24+24+16+16+16 - 96 
% of oxygen = 48/96 * 100 = 50 %

Hope it help u...

Answer 2

Answer:

50% IS THE ANSWER

Explanation: