A report on Chemical substance and Chemical composition

Steam and liquid water are two different forms of the same chemical (pure) substance: water.
Colors of a single chemical (Nile red) in different solvents, under visible and UV light, showing how the chemical interacts dynamically with its solvent environment.
Native sulfur crystals. Sulfur occurs naturally as elemental sulfur, in sulfide and sulfate minerals and in hydrogen sulfide.
Potassium ferricyanide is a compound of potassium, iron, carbon and nitrogen; although it contains cyanide anions, it does not release them and is nontoxic.
Cranberry glass, while appearing homogeneous, is a mixture consisting of glass and gold colloidal particles of about 40nm in diameter, giving it a red color.
Chemicals in graduated cylinders and beaker.

A chemical substance is a form of matter having constant chemical composition and characteristic properties.

- Chemical substance

The chemical composition of a pure substance corresponds to the relative amounts of the elements that constitute the substance itself.

- Chemical composition
Steam and liquid water are two different forms of the same chemical (pure) substance: water.

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