The REACTANTS of the chemical equation below are C6H12O6 and CO2.
C6H12O6 + 60
6CO2 + 6H, O

answer : a model is often used to explain and make things easier to understand when any scientific topic needs to be demonstrated and explained.

as in this case where a scientist wants to use a model to present the results of his detailed scientific investigation. he should do it as it will him to make the audience understand the concept in a much better way. also, it can be changed according to new scientific understandings.

the volume increases

listen, you cant how young you were.

"you didn't chose the stud life. the stud life chose you."