Biotic - animals anything tht is living abiotic anything tht is non-living
If you divide 8.1 by 1.8 that leads to 4.5
Nitrogen molecule is diatomic, whereas other elements form tetraatomic molecules.
Answer : The equilibrium will shift in the left direction.
Explanation :
Le-Chatelier's principle : This principle states that if any change in the variables of the reaction, the equilibrium will shift in the direction to minimize the effect.
The given reaction is:
As per question, when we are adding 
then the concentration of is increased on product side then the equilibrium will shift in the direction where decrease of concentration of takes place. Therefore, the equilibrium will shift in the left direction.
Thus, the equilibrium will shift in the left direction.
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