1. Give IUPAC names of following
(1)
CH, CÓ - CH - CH, CH, C
CH

a:

by the combination of an unlimited number of elements

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

that tool would be a compass