Question

Chemical equations.
a. Aluminium came in contact with air.

Answer 1

Answer : The balanced chemical equation is,

$4Al(s)+3O_2(g)\rightarrow 2Al_2O_3(s)$

Explanation :

When aluminium came in the contact with air,$(O_2)$ then they combine to form aluminium oxide.

The balanced chemical equation is,

$4Al(s)+3O_2(g)\rightarrow 2Al_2O_3(s)$

In this reaction, four moles of aluminium and two moles of oxygen gas react to produce 2 moles of aluminium oxide.

Answer 2

Answer:

4Al(s) +3o2(g)2Al2o3(s)

Explanation:

When aluminium came in the contact with air, (o2) then they combine to form aluminium oxide