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The number of isomers of C9H12 homologues belonging to benzene is?
Including 1 benzene ring and 3 C saturated alkyl groups
1. Overall propyl-C3H7,2 kinds, n-propyl and isopropyl; i.e. n-propylbenzene and isopropylbenzene
2. Divide into 2 groups, methyl, ethyl; i.e. ortho, meta, para
3. Divide into 3 groups,3 methyl groups,3 species; stand together, respectively,2 together,1 interval
8 In total
All the chemical formulas in the chapter of organic matter, which is a compulsory course for one to two in chemistry All the chemical formulas in the chapter of organic matter, which is a compulsory subject in chemistry All the chemical formulas in the chapter on organic matter in chemistry
The oxidation reaction (combustion) CH4+2O2 CO2+2H2O (light blue flame, no black smoke)2 substitution reaction (pay attention to the main reason of the reaction, there are five kinds of products) CH4+Cl2 CH3Cl+Cl2 CH2Cl2+HClCH2+Cl2 CHCl3+HClCl3+Cl2 CCl4+HC.
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- 15. (Chemistry 1) After the excess iron powder is put into the copper sulfate solution containing sulfuric acid and fully reacted, the solution is filtered, After the excess iron powder is put into the copper sulfate solution containing sulfuric acid and fully reacted, the solution is filtered, and the mass of filter residue is equal to the mass of iron powder put in. What is the ratio of sulfuric acid and copper sulfate in the original mixed solution?
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- 17. It is composed of -C6H6,-C6H4-,-OH,-CH2- four kinds of atomic groups, which belong to phenolic substances. It is compose of -C6H6,-C6H4-,-OH,-CH2- four kinds of atomic groups, which belong to phenolic substance.
- 18. In maximum number of carbon atoms in the same plane is Why is 5 instead of 8, the next 5 is which five. In maximum number of carbon atoms in the same plane is Why is 5 instead of 8, the next five is which five. The maximum number of carbon atoms in the same plane is Why is 5 instead of 8, the next 5 is which five.
- 19. Is it correct to say that two organics that differ in molecular composition by one'CH2' atom must be homologues?
- 20. In homologues, the matter which conforms to the same general formula and whose molecular composition differs by several CH2 groups is not necessarily homologues.