Question

if 1.5 of oxygen combines with Al to form Al2O3 , the mass of Al in g used in the reaction is (atomic mass of Al=27) please don't spam it's urgent ​

Answer 1

Explanation:

4 Al + 302 -----> 2alo3

Mass of 4 aluminium is 108 g

So 3 moles of oxygen react with 1o8g of al

So 1 moles of oxygen react with 108 ÷ 3 g of al

And 1.5 moles of oxygen react with 108 × 1.5 ÷ 3 g of al

Al = 54 gram