Question

6. Calculate the mass of aluminium oxide formed when 27 g of aluminium foil is burnt completely in
oxygen. (Al = 27, 0 = 16)​

Answer 1

answer:

The balanced equation for the given reaction is:

4 Al + 3 O2 --------> 2 Al2O3

Atomic mass of Al = 27g

Atomic mass of O2 = 2 � 16 = 32g

Mole ratio of aluminium and oxygen can be given as:

Al : O2

4 : 3

1 : 3/4

Mass of O2 required = 3/4 � 32 =24g