Given:
1 mole of compound synthesized from its elements
Temperature of the substances in their standard states = 25 degrees Celcius
First, gather data from reference books on the standard heats of formation of the elements. Then set up a balanced equation for the reaction. From there, calculate the heat of reaction.
Answer:
The arrangement of particles is least ordered is a > c > b > d
Explanation:
Given that,
The arrangement of particles is least ordered in a sample of NaCl.
We know that,
The least ordered arrangement are.
The form of state of particle in least ordered.
So, The least ordered arrangement will be
aqua > gas > liquid > solid
The arrangement of particles is least ordered in a sample of NaCl

Hence, The arrangement of particles is least ordered is a > c > b > d
Answer:
it is organism the third one
Because of the ammount of water and the boling point of the Ganga River has changed due to the mixtures of different kind of chemicals and acids