The tea in Liyang, Changzhou is famous all over the country, among which four kinds of green tea, such as Tianmu Lake Bai Cui and Shahe Guiming, won the prize in the "China Teacup" famous tea appraisa

The tea in Liyang, Changzhou is famous all over the country, among which four kinds of green tea, such as Tianmu Lake Bai Cui and Shahe Guiming, won the prize in the "China Teacup" famous tea appraisal. A. According to the chemical formula of tannic acid, C76H52O46, tannic acid consists of three elements: carbon, hydrogen and oxygen; Therefore, one statement is correct;

B, according to the oxide is a compound composed of two elements, one of which is oxygen, it can be judged that tannic acid is not an oxide; Therefore, B is correct;

C, accord to that mass ratio of each element in the compound = relative atomic mas of each element × atomic number, the mass ratio of carbon, hydrogen and oxygen in the tannic acid composition is (12× 76): 52: (16× 46);

In tannic acid composition, the atomic number ratio of carbon, hydrogen and oxygen is 76: 52: 46; So, c is wrong;

D, according to the number marked in the lower right corner of the element symbol indicating the number of atoms contained in a molecule, the number of atoms contained in a tannic acid molecule can be obtained as follows:

76+52+46= 174; Therefore, D's statement is correct;

So choose C.