Solution: Option (A) is the answer.
5. Benzylamine may be alkylated as shown in the following equation :
C6H5CH2NH2 +R-X → C6H5CH2NHR
Which of the following alkyl halides is best suited for this reaction through
SN1 mechanism?
(i) CH3Br
(ii) C6H5Br
(iii) C6H5CH2B,
(iv) C2H5 Br

Modern pennies are composed of zinc coated with copper. a student determines the mass of a penny to be 2.482 g and then makes several scratches in the copper coaling (to expose the underlying zinc). the student puts the scratched penny in hydrochloric acid, where the following reaction occurs between the zinc and the hcl (the copper remains undissolved): zn(s) + 2 hcl(aq) → h2(g) + zncl(aq)the student collects the hydrogen produced over water at 25 °c. the collected gas occupies a volume of 0.899 l at a total pressure of 79 j mmhg. calculate the percent zinc (by mass) in the penny. (assume that all the zn in the penny dissolves.)

What is true for a substance that releases energy

Now look at the segment of the graph between the two data points marked with black squares. describe how the boiling point and melting point plots behave between these points. be as specific as possible.