Any substance that is not a mixture is a pure substance. When colored watercolors are applied to paper, sometimes the colors in the ink separate. This technique is called chromatography
There is no chemical change
CH3 is a methyl radical, which is formed by removing the hydrogen atom from methane, so the hybridization is SP^3
Quantitative observations include numerical data. Ex: 32 degrees, 10 inches, etc.
In which region is the substance in both the solid phase and the liquid phase ?
2