Question

27g of al will react completely with oxygen equals to​

Answer 1

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

Answer 2

Balance chemical eq.

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

Mass Al = 27g

Mass O2= 16×2

32g

Therefore the ratio of Al and oxygen

Al. : O2

4. : 3

1. : 3/4

Hence 3/4× 32

24g of oxygen

Good luck