Answer:
When two atoms are very far apart, the potential energy approaches zero.
Answer:The reaction absorbs 8100 J of energy from the surroundings as it proceeds.
Explanation:
1)The branch of science concerned with the substances of which matter is composed and it is a study of matter.
2)It helps you understand the world around you,chemistry helps you to understand product labels and etc.
3)You find chemistry in daily life in the foods you eat,the air you breathe,cleaning chemicals and etc.
4) Physical,Analytical, Biochemistry,Organic and inorganic chemistry.