Explanation:
More is the electronegativity of atoms attached to the alpha carbon atom more will be the attraction of electron towards it. As a result, release of hydrogen ion will be easier.
Therefore, there will be increased in acidity of the compound.
Since, fluorine, chlorine and bromine are all group 17 elements and fluorine is more reactive than chlorine. On the other hand, chlorine is more reactive than bromine.
Hence, ability to attract the electrons towards itself will be maximum in fluorine and least in bromine.
Therefore, decreasing order of acidity of the given compounds is as follows.
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Answer: Each trial was repeated several times during the experiment.
A scientific design refers to a scientific plan or methodology, which needs to be followed to perform a experiment so as to obtain accurate and appropriate result matching with the situation of the hypothesis. Each trial was repeated several times during the experiment best describes an experiment that had a good scientific design because trials in an experiment brings either concordant or consistent results or inconsistent results. The concordant results suggests that the methodology applied is correct, and inconsistent results show that methodology applied is incorrect.
Answer: 
has aldehyde functional group.
Explanation:
Functional groups are specific group of atoms within molecules that are responsible for the characteristic chemical reactions of those molecules.
A. 
has ketone 
functional group .
B. 
has carboxylic acid 
functional group .
C. has aldehyde 
functional group .
D. 
has ester 
functional group .
Thus has aldehyde (CHO) group.
Answer:
The answer to your question is: pOH = 5.7
Explanation:
pOH is a measure of the concentration of OH ions.
Data
pOH = ?
Molarity = 2.1 x 10 ⁻⁶ M
Formula
pOH = -log [OH]
Substitution
pOH = -log[2.1 x 10⁻⁶]
pOH = 5.7
and pH = 14 - pOH
pH = 14 - 5.7
pH = 8.3
<span>An excellent tool to gauge the reliability of any theory is its capacity to generate correct hypotheses. Hypotheses is validated by theories, and theories make up laws.</span>
