What is the difference between a subscript and a coefficient in a chemical reaction?

The subscripts represents the number of atoms of each individual element in a compound. The coefficients indicates the number of moles each compound are present in the chemical reaction. Numerical coefficients are determined through balancing the chemical equation by comparing each subscripts in both the reactant and product side.

Explanation:

1.solid

2.carbon dioxide

3.helium

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.