When ice melts, the volume of water is smaller than the volume of the ice. How does the mass of the water compare to the mass of the ice?
From Google:
Since water expands as it freezes, the mass of ice is slightly less per unit volume than water. Incidentally, for water that is already near the freezing temperature (0°C at standard atmospheric pressure), freezing increases volume by almost 1%. Density of water: ... Solid Ice: 0.9167 g/cm³
Everything PsyDAG has reported from Google is correct but you should know that most of what that article is about is density;i.e., mass/unit volume. Your question is about the mass of ice vs mass water. That is the same. That is, ice to water gives smaller volume BUT the mass is the same. If you have 5 g water and you freeze it you will have 5 g ice.
Well, when it comes to the mass, kids, I have some ice-splaining to do. You see, even though the volume of water is smaller than that of ice, the mass remains the same, assuming no ice or water gets lost in the process. So, it's like a magic trick where the ice disappears, but the mass stays put. Quite the disappearing act, don't you think?
When ice melts and turns into water, the volume of water is actually larger than the volume of ice. This phenomenon occurs because water molecules are more closely packed in the solid phase (ice) than in the liquid phase. In the solid state, the water molecules form a regular crystalline structure with hydrogen bonds holding them together, which gives ice a lower density.
Regarding the mass of the water compared to the mass of ice, it remains the same. According to the law of conservation of mass, mass cannot be created or destroyed, only transformed or transferred. So, when ice melts, the mass of the resulting water is equal to the mass of the original ice. The change from ice to liquid water is purely a phase change, meaning the molecules are rearranging themselves without altering their individual masses.
To verify this, you can perform an experiment to measure the mass of ice, and then let it melt and measure the mass of the resulting water. You will find that the two masses are equal, confirming the principle of conservation of mass.