H8O6 is completely burned in oxygen to produce how many grams of carbon dioxide can be generated

What kind of substance are you, there is no carbon, how can carbon dioxide be generated?

CO2 Late CO2

Molar c-CO2 molar Li-carbon.

Shuijingyan 18 = molar h-h2o molar hydrogen.

C2H6 Possibly.

2 moles of carbon.

6 moles.

The mass of carbon in carbon dioxide is gram multiplied by 12/44 of the mass of hydrogen element.

Let the chemical formula be cxhy 12x:y= x:y=3:8, so the chemical formula is five: c3h8

Answer] C Answer Analysis] Test Question Analysis: If the organic matter is fully burned in oxygen, and the ratio of the amount of CO2 and H2O produced is 1:2, then the ratio of the number of hydrocarbon atoms in the organic molecule is 1:

4, that is, the carbon atom has reached a saturated state, so the number of hydrocarbon atoms in the organic molecule is 1 and 4 respectively, nitrogen can not be determined whether the spring slip contains oxygen elements, c is correct, the rest of the options are correct, the answer is c.

Test Center: Examine the judgment of the structure and chemical formula of organic matter.

Comments: This question is a moderately difficult test question, which mainly tests students' understanding of the structure and chemical formula determination of organic matter and mastery of hidden search, aiming to cultivate students' ability to analyze, summarize and summarize problems. The key to this problem is to clarify the characteristics of the electron configuration of carbon atoms outside the nucleus, that is, carbon elements can only form up to 4 covalent bonds, and then flexibly use them in combination with the meaning of the question, which is conducive to cultivating students' logical reasoning ability and divergent thinking ability.

c Analysis: Mass of carbon in gram carbon dioxide =; Mass of hydrogen in water =; Based on the above analysis, it can be seen that the sum of the masses of hydrogen and carbon after the reaction = according to the law of conservation of mass, the compound must contain oxygen, so the compound contains three elements: hydrogen, carbon and oxygen; The ratio of the number of carbon, hydrogen and oxygen in the compound is:

From the above analysis, it can be known that the compound contains three elements: hydrogen, carbon, and oxygen, so a is wrong; The compound must contain oxygen, so b is wrong; The ratio of the number of carbon and hydrogen atoms in the compound is 1:4, so c is correct, which is the answer to this question; The molecular formula of the compound could not be determined, so d is wrong.

Amount of CO2 =

44g/mol，n（c）=，m（c）=， h2

O Amount of Substance =

18g mol, n(h)=,m(h)=,because m(c)+m(h)=,so the compound also contains oxygen,n(c):n(h)=::3 in the organic molecule,abc is wrong,d is correct,so choose d

The mass of oxygen in CO2:, the mass of carbon is:

The mass of oxygen in H2O:, the mass of hydrogen is:

So the oxygen element contained in the compound is mass:

Therefore, the compound contains carbon element, hydrogen element, and oxygen element.

Carbon dioxide contains carbon:

Water contains hydrogen: According to the law of conservation of mass, a compound contains oxygen:

The masses of carbon, hydrogen, and oxygen are , respectively

The ratio of the number of atoms of carbon, hydrogen and oxygen is (:6:1 and the chemical formula is C2H6O

a Generated by combustion of organic matter.

and O, then the organic molecule must contain elements C and H, and when it may contain oxygen, a is wrong;

The amount of carbon dioxide is: n(CO2

44g mol, the amount of water is n(h2

o)=18g mol, then n(c):n(h)=::4, so b is correct;

c．n（c）=n（co2，m（c）=，n（h）=2n（h2

o)=,m(h)=,since, so the compound must contain oxygen, so c is wrong;

d Because the relative molecular weight of the organic substance is not known, the molecular formula of the organic substance cannot be determined, so d is wrong;

Therefore, choose B

Medium, c quality

, h quality

The mass of carbon and hydrogen is smaller than the mass of the compound, so the compound also contains oxygen.

c：h＝:4

a.The compound contains only two elements, carbon and hydrogen.

Wrong. b.The ratio of the number of hydrocarbon atoms in this compound is 1:4

Wrong. The ratio of the number of carbon, hydrogen and oxygen atoms in this compound is 1:4:1cIt is not possible to determine whether the compound contains oxygen atoms or not.

Wrong. d.The compound must contain oxygen (Explanation d) pairs. Since the mass of carbon and hydrogen in the product is smaller than the pre-chaotic mass of the compound, the compound also contains oxygen.

The mass of the compound containing the element carbon is 44=

Between the hydrogen elements contained are and 18=

Then the difference is that the mass of the oxygen element contained is.

The chemical formula of this compound is C2H8O2

The correct ones are b, d