Chemical reactions project modeling the conservation of mass pls help just need answer

The law of conservation of mass states that

In any chemical reaction mass is neither created nor destroyed rather it remains conserved

Look the chemical reaction below

Count the mass on both sides and simplify

the electrical  conductivity  of asolution  of an electrolyte is measured by determining the resistance of thesolution  between two flat or cylindrical electrodes separated by a fixed distance.

answer by yourhope:

how do models compare to real-world objects?

d. most models represent a real-world object in a simpler way.

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