Final answer:
The flow chart demonstrates conservation of mass, where the total mass of the mixture equals the sum of the individual components' masses.
Step-by-step explanation:
The steps shown in the flow chart demonstrate the concept of conservation of mass. This principle states that mass is neither created nor destroyed in a chemical reaction or physical process. In this case, when 200 g of water, 75 g of sugar, and 50 g of salt are combined and the salt and sugar dissolve, the total mass of the mixture is 325 g. The combined mass equals the sum of the individual masses, illustrating the conservation of mass.