Final answer:
Mass is conserved during a physical change, such as when sugar undergoes a transformation. The law of conservation of mass ensures that the total mass remains unchanged if no mass is added or removed from a closed system.
Step-by-step explanation:
Yes, mass is conserved when 50 g of sugar undergoes a physical change. The law of conservation of mass states that mass cannot be created or destroyed in a chemical reaction or physical change. This means that the total mass of materials present after a physical transformation is the same as before the transformation. For instance, when sugar dissolves in water, it changes from a solid to a solution (a physical change), but the total combined mass of the sugar and water remains unchanged.
Moreover, the law applies to closed systems, meaning that if no additional mass is added or taken away from the system, the initial mass will be the same as the final mass. So, if you were to dissolve the 50 g of sugar into water in a sealed container, the mass inside the container would remain 50 g plus the mass of the water before and after the sugar is dissolved.