Question

1. what is the purpose of a scientific model? to generate new laws and theories within established frameworks to prove a hypothesis about observed data relationships to replace real - world investigations entirely to represent phenomena, systems, processes, or solutions to engineering problems 18. what is conserved during a chemical reaction? mass temperature volume energy

Explanation:

1. Scientific models represent real - world phenomena, systems, etc. They are not for generating new laws/theories in the given sense, can't prove hypotheses (only support or refute), and can't replace real - world investigations entirely.
2. According to the law of conservation of mass in chemical reactions, mass is conserved. Temperature, volume can change, and while energy is conserved in an isolated system in a broader sense, the most directly conserved quantity in a chemical reaction from the options is mass.

Answer:

1. To represent phenomena, systems, processes, or solutions to engineering problems
2. Mass