(a) Interpretation: Density of the solution should be calculated. Concept introduction: Compound with the high amount take as the solvent and the compound with the less amount take as the solute. Density = Mass of solution Volume of solution
(a) Interpretation: Density of the solution should be calculated. Concept introduction: Compound with the high amount take as the solvent and the compound with the less amount take as the solute. Density = Mass of solution Volume of solution
Solution Summary: The author explains that the percent of sucrose in the solution should be calculated.
Compound with the high amount take as the solvent and the compound with the less amount take as the solute.
Density = Mass of solution Volume of solution
Interpretation Introduction
(b)
Interpretation:
The percent of sucrose in the solution should be calculated.
Concept introduction:
Percent of compound A by mass = (Mass of compound A(Mass of compound A + Mass of compound B))×100
Interpretation Introduction
(c)
Interpretation:
The mole fraction of sucrose in the solution should be calculated.
Concept introduction:
Number of moles = (mass of the compoundmolecular mass of the compound)Mole fraction of compound A = (Moles of compounn AMoles of cmpound A + Moles of compound B)
Interpretation Introduction
(d)
Interpretation:
Molality of the solution should be calculated.
Concept introduction:
Molality of the solution = Amount of solute (moles)Mass of solvent (kilograms)
Interpretation Introduction
(e)
Interpretation:
Molarity of the solution should be calculated.
Concept introduction:
Molarity of the solution = Amount of solute (moles)Volume of the solution (Liters)
Part II. xiao isolated a compound TAD (Ca H 10 N₂) from tobacco and obtained its IR spectrum. Xiao proposed
a chemical structure shown below:
% Transmittance
4000
3500
3000
2500 2000
Wavenumber (cm-1)
1500
1000
(a) Explain why her proposed structure is inconsistent with the IR spectrum obtained
(b) TAD exists as a tautomer of the structure xiao proposed. Draw the structure
and explain why it is more compatible with the obtained spectrum.
(C) what is the possible source for the fairly intense signal at
1621cm1
AE>AE₁ (Y/N)
AE=AE₁ (Y/N)
AE
Treatment of 2-phenylpropan-2-amine with methyl 2,4-dibromobutanoate in the presence of a nonnucleophilic base, R3N, involves two successive SN2 reactions and
gives compound A.
?
NH2
Br
Br
Propose a structural formula for compound A.
You do not have to explicitly draw H atoms.
You do not have to consider stereochemistry.
In cases where there is more than one answer, just draw one.
R3N
C14H19NO2
+ 2 R3NH*Br
A