What year was the liquor plasticizer incident?

Test and analysis: According to the chemical formula of dibutyl phthalate (C 24 H 38 O 4), the relative molecular weight of dibutyl phthalate is12× 24+38+16× 4 = 288; The mass ratio of carbon to oxygen is12× 24: 38 =144:19; The mass fraction of hydrogen is the smallest; Dibutyl phthalate consists of three elements: carbon, hydrogen and oxygen. Choose D.

Comments: The chemical formula gives information such as element composition, atomic number ratio, element mass ratio and relative molecular mass. The relative molecular mass of the compound is equal to the sum of the relative atomic masses of the elements in the compound;

The mass ratio of each element in a compound is equal to the ratio of the relative atomic mass of each element to the product of the number of atoms.

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These six ingredients of traditional Chinese medicine nourish the whole body and mind, and they are good ingredients that come from the same source as medicine and food.

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