In this case mass doesn't change.
Mass is neither a physical nor chemical change; however, it is a physical property of matter.
It is a physical change.
Saying that mass is conserved during a physical change means that the total mass of the substances involved remains constant before and after the change. This principle is a fundamental aspect of the law of conservation of mass, which states that mass can neither be created nor destroyed in a chemical reaction or physical change, only transformed into different forms.
No. A physical change like melting does not make something's mass change.
In a physical change, the mass remains the same since it involves a rearrangement of particles without changing their identities. However, in a chemical change, the mass can change due to the formation or breaking of chemical bonds, resulting in a gain or loss of mass.
The physical change in a robot is reversible if the change does not alter the molecular structure of the materials involved. If the robot is disassembled and reassembled, the change is likely reversible. One can tell that the change follows the law of conservation of mass by weighing the robot before and after the change. If the mass remains the same, then mass has been conserved.
neither physical or changes its property
Physical changes are like cutting paper. The mass does not change. Chemical changes do not change total mass either. If you put a candle in a sealed container so that you may measure the total mass of the candle and the air before burning, then light the candle electrically but keep everything sealed, the total mass after burning will still be the same. But if you measure only the candle, then its mass has changed. So the mass of one single 'ingredient' will change during a chemical change.
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no change in mass
Neither a chemical nor a physical change results in a change in mass. According to the law of conservation of matter/mass, matter can neither be created nor destroyed. This law holds true for physical and chemical changes.