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Ammonium salts decompose when heated, but not all produce ammonia Give me an example of why. Xie
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What kind of ammonium salt doesn't produce ammonia gas after thermal decomposition What kind of ammonium salt does not produce ammonia gas after thermal decomposition
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- 1. The composition of a hydrocarbon is C15H24, and its molecular structure is very symmetrical. It is proved that there are only three groups in the hydrocarbon: vinyl (-CH=CH2) methylene (-CH2 The composition of a hydrocarbon is C15H24, and the molecular structure is very symmetrical. The experiment proves that there are only three groups in the hydrocarbon: Vinyl (-CH=CH2) methylene (-CH2-) methylene () And the vinyl and the methylene must be linked by methylene. When the hydrocarbon is a monocyclic structure, the vinyl in the molecule And the number of methylene groups is A.2,3 B.3,3 C.4,6 D.3,6
- 2. - How to read the group CH2-CN?
- 3. How to read CH2Cl-CH2-CH2-CH2-CH2-CH3? And this CH3-CHCl-CH2-CH2-CH2-CH3
- 4. -(CH2)16 CH3!
- 5. CH2=CH-C≡C-CH3 has several atoms coplanar, why? Tomorrow's the exam. Come on, CH2=CH-C≡C-CH3 How many atoms are coplanar? Tomorrow's the exam. Come on,
- 6. Propylene, why must be written as CH2=CH-CH3, can not be written as CH3-CH=CH2
- 7. A. The R group of methionine is —CH 2—CH 2,—S—CH 3, and its molecular formula is that C5H11O2NSB. tyrosine is almost insoluble in water, while arginine is soluble A. The R group of methionine is —CH2—CH2,—S—CH3, then its molecular formula is C5H11O2NS B. Tyrosine is almost insoluble in water, whereas arginine is soluble in water, a difference caused by differences in R groups C. n amino acids have a total of m amino groups, then the number of amino groups in a polypeptide condensed from these amino acids must be m-n D. If the molecular formula of sweet peptide is C13H16O5N2,, the sweet peptide must be a dipeptide. Why sweet peptide two N must be dipeptide? Can not be a peptide?
- 8. How to prepare magnesium hydroxide with strong and weak bases? Find the chemical equation.
- 9. Substances whose molecular composition differs by one or more CH2 groups must be homologues Can you give a counterexample? Substances whose molecular composition differs by one or more CH2 groups must be homologues Can you cite a counterexample? Substances whose molecular composition differs by one or more CH2 groups must be homologues Can you give us a counterexample?
- 10. Judgement: Organic matter with one or more CH 2 groups are homologues. Judgement: Organic compounds with one or more CH 2 groups are homologues.
- 11. The ammonium salt produced by a reaction in a chemical equation is written in the case of ammonia and in the case of ammonium salt (a reaction in solution). For example, AlCl3+3NH3·H2O ===? The ammonium salt produced by a reaction in a chemical equation is written in the case of ammonia and in the case of ammonium salt (a reaction in solution). Such as AlCl3+3NH3·H2O===?
- 12. The chemical equation of ammonia production from ammonium salt and alkali is used in laboratory.
- 13. Inspection of ammonium salt Ammonium salt can be tested by adding sodium hydroxide solution for co-heating. Does the solution have to be added? Is it possible to add sodium hydroxide to the solid for co-heating? Is it possible to add other bases? Or must it be strong alkali? Inspection of ammonium salt Ammonium salt can be tested by adding sodium hydroxide solution for co-heating. Does the solution have to be added? Is it okay to add sodium hydroxide to the solid for co-heating? Is it possible to add other bases? Or must it be strong alkali?
- 14. Is it possible for CH3CH=CHCl (CH3)2C=CHCH3CH2=CCl to form cis-transisomer? Can CH3CH=CHCl (CH3)2C=CHCH3CH2=CCl form cis-transisomer?
- 15. 6. The cis-trans isomer of the following compounds: A. CH3CH = CHCH3 B.CH3CH2CH2CH = CH2 C.CH3CH = C (CH3)2 D. CH3C≡ CCH3 6. The cis-trans isomer of A. CH3CH = CHCH3 B.CH3CH2CH2CH = CH2 C.CH3CH = C (CH3)2 D. CH3C≡ CCH3
- 16. Ask why CH2=C (CH3)2 and CH3CH=CHCH3 are carbon chain isomers...
- 17. CH2=C (CH3)2CH3CHH=CH=CH3 Why is CH2=C (CH3)2 and CH3CH=CHCH3 Functional Isomerism rather than Carbon Isomerism Give an example of the carbon chain isomerization of olefins! Is CH2=C (CH3)2CH3CHH=CH=CH3 Why is CH2=C (CH3)2 and CH3CH=CHCH3 Functional Isomerism rather than Carbon Isomerism Give an example of carbon chain isomerization of olefins!
- 18. How to write the chemical equation of carbon incomplete combustion to produce carbon monoxide? The key does not understand the conditions. Do you really write "incomplete combustion "? How to write the chemical equation of carbon incomplete combustion to produce carbon monoxide? Key don't understand the conditions. Really write "incomplete combustion "? How to write the chemical equation of carbon incomplete combustion to produce carbon monoxide? The key doesn't understand the conditions. Do you really write "incomplete burning "?
- 19. NaHCO3 and Ca (OH)2, NaOH and Ca (HCO3)2 reaction What is the pattern of this weak acid salt reacting with the base NaHCO3 and Ca (OH)2, NaOH and Ca (HCO3)2 reaction What is the pattern of this weak acid salt and alkali reaction
- 20. The reaction equation of Ca (OH)2 with a small amount of NaHCO 3 and an excessive amount of NaHCO 3 obtained.