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the mass of the property does not change
Water as a liquid and water as a gas (vapors) have the same chemical composition.
Atoms are rearranged, heat may be given off, changes in color and odor might occur, or a gas or precipice may be formed. The composition is changed, and the above are signs of a chemical change.
a Edit: The question is very mixed up, but I think I get the idea. It's obviously an emission spectrum. Because it is a high density gas the spectrum should be CONTINUOUS.
In fact there is a chemical composition of chloroform and nytric acid called Chloropcrin in tear gas which causes eye burning while tear gas cells are burst.
formulae of tearing gas.
Yes.
puke and titi
puke and titi
nitrous oxcide. or NO2 aka laughing gas.
It is a physical change because the chemical composition has not changed.
It is HNO3, if it is the chemical composition that you need. It is a gas caused by burning nitrous oxide. It is very harmful to the human body.
chemical change = chemical reaction. ( the composition of matter always changes). In a chemical change the matter in one thing changes, for example you will know a chemical change has occurred when the color or odor has changes or when a new gas is given off.
Co + h2
the mass of the property does not change
Water as a liquid and water as a gas (vapors) have the same chemical composition.