Question

A 4.91 g sample of aluminum completely reacts with oxygen to form 6.85 g of aluminum oxide. Use this data to calculate the mass percent composition of aluminum in aluminum oxide.


i got 61.2% first and it was wrong. then i got 53.0% and it was wrong

Answer 1

i got the answer. thanks anyways!

Answer 2

You didn't get the right answer using those numbers did you? 4.91 g Al should form more than 6.85 g Al2O3.