1 The painkiller paracetamol is synthesised from 4-aminophenol.
Chromatography was carried out on an impure sample of paracetamol. The results are shown
(not drawn to scale).
solvent front
0.35 cm
key
0.26 cm
S = impure sample of paracetamol
P = pure paracetamol
.
0.17 cm
baseline
S
Р
The sample of paracetamol was contaminated with 4-aminophenol only.
What is the R, value of 4-aminophenol?
D
C 0.74
1.35
0.65
B
0.49
A

Draw the lewis dot structure for each of the following polyatomic ions

Light waves can move through , but they travel fastest when they move through a(n) .

You just calculated that the heat of fusion for chloromethane is 6400 j/mol. the heat of fusion for hydrogen is 120 j/mol.? which of the following account for this difference? more than one correcta. chloromethane can absorb more energy at the same temperature. b. hydrogen has stronger intermolecular forces than chloromethane. c. hydrogen molecules can pack more closely than chloromethane molecules. d. chloromethane experiences dipole-dipole interactions. e. chloromethane has a higher molar mass than hydrogen.