Is there a difference between chemical composition and chemical composition?

1, chemical composition: the proportion of chemical elements, expressed by experimental formula.

2. Chemical structure: it is a category that reflects the arrangement order of atoms of each element in a substance molecule, that is, the connection mode and order of atoms.

Second, the role is different.

1. chemical composition: a concept in chemistry, which has different but similar meanings in pure substances and mixtures.

2. Chemical structure: it is the basis for understanding and mastering the chemical properties and chemical reaction laws of substances.

Third, the expression is different.

1, chemical composition: There are many ways to express concentration, and the chemical composition of the mixture can also be expressed in several different ways, such as molar fraction, volume fraction, mass percentage concentration, weight molar concentration, volume molar concentration, equivalent molar concentration, etc.

2. Chemical structure: The sequence of amino acids connected together in protein polypeptide chain, including disulfide bond position, are all connected by * * * valence bond.

Baidu encyclopedia-chemical structure

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