The law of mass conservation is generally valid.
After water has been boiled, its mass will stay the same.
Salt is not evaporated with water and remain as a residue.
Your mass will stay the same no matter where you go.
The water level does stay the same because water cannot escape with a place for it to escape. As water evaporates, it soon condeses without anywhere to escape.
The density of water remains constant regardless of the volume or shape of the container it is in. This is because the mass of water and its volume stay the same, resulting in the same density for both a pool and a cup of water.
The mass of an object can be subtracted or added. For example, with water, you can just add more to have a larger mass. With ice, you can just chop off a portion to lessen its mass. Though, if you take a piece of paper and crumple it up, the mass will stay the same. It just depends on the context of the situation.
Yes, no gas is given off, therefore the mass of conversation will stay the same.
During the freezing process, the mass of water remains the same. While the water changes from liquid to solid form, the amount of water does not increase or decrease; it merely undergoes a phase change. Therefore, the total mass of the water before and after freezing is constant.
Yes, salt remain as a solid residue.
Your mass will stay the same. Mass is always the same no matter what.
Your mass would stay the same. Mass is the amount of matter in an object, so your mass would stay at 68kg.
Yes