Answer:
5 will come in blank
4KMnO₄ ----------> 2K₂O + 4MnO + 5O₂
Step-by-step explanation:
Reaction:
4KMnO₄ ----------> 2K₂O + 4MnO + ____O₂
this reaction is the dissociation reaction in which KMnO₄ is break down into its component.
KMnO₄ upon dissociation gives Potassium oxide, manganese oxide and liberate oxygen
Balance Chemical Equation:
A balanced chemical equation is that in which the the number of the reactant atoms equal to the number of the product atom.
For example if the oxygen at the reactant side is 4, the number of oxygen should be 4 on the product side.
So for this purpose we have to balnce the reaction and number of atoms on each side of the arrow
if we see the given Equation
Numbers of atom on reactant Side:
K = 4
Mn = 4
O = 16
Numbers of atom on reactant Side:
K = 4
Mn = 4
O = 6 instead of blank oxygen molecule
so from the above data we have 10 oxygen less.
If we put the 5 in the blank then we will have 10 oxygen and equation will be balanced
So the balanced Equation will be
4KMnO₄ ----------> 2K₂O + 4MnO + 5O₂