问一些化学问题（英文的）1)Thestepwiseformationconstantsforthecomplex[Ni(NH3)6]Cl2arelog10K1=2.72,log10K2=2.17,log10K3=1.66,log10K4=1.12,log10K5=0.67andlog10K6=-0.03.Thelog10β6istherefore:

Question

问一些化学问题（英文的）
1)
The stepwise formation constants for the complex [Ni(NH 3) 6]Cl 2 are
log 10K 1 = 2.72,
log 10K 2 = 2.17,
log 10K 3 = 1.66,
log 10K 4 = 1.12,
log 10K 5 = 0.67 and
log 10K 6 = -0.03.
The log 10β 6 is therefore:-

A. 8.31
B. 8
C. 8.34
D. 4.04
2)
There are five dimethylhexane isomers. Which one(s) can exhibit optical activity? (Select ALL correct answers)
A. 3,3-dimethylhexane
B. 2,3-dimethylhexane
C. 2,4-dimethylhexane
D. 2,5-dimethylhexane
E. 2,2-dimethylhexane
3)
Select the active nitrating species in aromatic nitration reactions involving a mixture of concentrated nitric and concentrated sulfuric acids:
A. HO-NO2
B. NO2-
C. NO2+
D. HO-SO2-ONO2
E. [H2O-NO2]+
4)
What class of organic compound is hydrolysed in aqueous acid to produce a carboxylic acid and an alcohol?

Answer 1

1)?
2)abce
3)d
4)Ester