Homework Answers
The viscosity of compound depends upon the intermolecular forces that exist between different molecules and that holds molecules together.
Glycerol molecles can form intermolecular hydrogen bonding between hydrogen atom attached to electronegative oxygen atom with neighbouring electronegative oxygen atom. The presence of intemrolecular hydrogen bonding holds the glycerol molecules together and as a result glycerol is highly viscosu liquid.
However, benzene molecule is non polar and there is no possibility of hydrogen bonding since there are no hydrogens attached to any electronegative atoms. Only intemroelcular forcs of attraction are London or dispersion forces. Since these dispersion forces are weaker the resultant visocisty is also lower.
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9) Benzene, which has very symmetric (6-fold symmetry) as shown below, has small viscosity, while glycerol...
9. (6 pts) (a) Indicate which curves below correspond to Newtonian, Pseudo plastic (shear thinning, i.e....
9. (6 pts) (a) Indicate which curves below correspond to Newtonian, Pseudo plastic (shear thinning, i.e. non-Newtonian) and Shear thickening behavior. (b) Draw the expected viscosity versus shear rate for the three polymer samples in a Single Plot (high molecular wt, medium mol weight and low mol wt). Shear Stress Shear Rate.
An atom has a very small nucleus surrounded by an electron "cloud The figure below repeesents...
An atom has a very small nucleus surrounded by an electron "cloud The figure below repeesents the mucleus with a drameter of about 2 mm and describes the electron cloud as extending over 200 m. If the diameter of an atom is 1 x 10cm, nhat is the approximate diameter of its nucleus? Nudeus with protom (positive electric change) and neutrons nvo electric chargel. Diamete 6 Which of these particles constitute the nucleus of an atom? Select all that apply)...
A very thin wire lies in the xy plane. It has the shape shown below consisting...
A very thin wire lies in the xy plane. It has the shape shown below consisting of two circular segments, centered at the origin, which are connected together. There is a current i in the wire as shown. A particle with charge q is at the origin with some velocity in the +x direction. R 2R φ Vo 9 (out of page) If the magnetic field at the origin was measured to be B = - Biv and an external...
Condensed structural formulas of ethanol and ethylene glycol are shown below. Indicate which compound has the...
Condensed structural formulas of ethanol and ethylene glycol are shown below. Indicate which compound has the HIGHER surface tension and EXPLAIN why
6. Which of the following reagents can be used to complete the reaction shown below? CH,CH,...
6. Which of the following reagents can be used to complete the reaction shown below? CH,CH, CH2-CECH CH,CHCHECH b. H2O with H2SO/HgSo. a. BH, followed by H2O2 d. None of the above. c. O, in CH,COOH 7. Which of the following is the major product of the reaction shown below? pyridine 8. Which of the following aromatic substitution reactions is most likely to give a polysubstituted product with benzene as a reactant? a. Friedel-Crafts Acylation b. Friedel-Crafts Alkylation c. Nitration...
Training Question 3. Shown below is the activity profile for the enzyme phosphofructokinase-1 (PFK-1) which catalyzes...
Training Question 3. Shown below is the activity profile for the enzyme phosphofructokinase-1 (PFK-1) which catalyzes the reaction: Fructose 6-phosphate + ATP → fructose 1,6-biphosphate + ADP. Low (ATPI PFK-1 activity High (ATP) [Fructose 6-phosphatel Describe the different patterns of regulation for different ATP levels. Explain the why such regulation is appropriate for this enzyme, given its role in metabolism.
Which of the fatty acids shown below is octadecanoic acid? (3 pts) (a) HO (6) HO...
Which of the fatty acids shown below is octadecanoic acid? (3 pts) (a) HO (6) HO C НО" O HO e HO Which of the fatty acids shown below has the lowest boiling point? Why? (3 pts) HO Chemical Formula: C16H3002 (b) HO Chemical Formula: C16H3202 (c) HO Chemical Formula: C16H2802 o (d) HO Chemical Formula: C16H300 e HO Chemical Formula: C18H360
As it is shown in the figure above, there's a system of three chambers, each of which has the vol...
As it is shown in the figure above, there's a system of three chambers, each of which has the volume v. Initially there's only A particles in chamber l; B particles in chamber II, and C while wall between chamber ll and Ill is only permeable to particle C. All thhree types of particles can be treated as ideal gases. The number of particles are denoted by NA, NB, NC a) If none of the particles are chemically active, what...
As it is shown in the figure above, there's a system of three chambers, each of which has the vol...
This question is related to thermal physics by Kittel.
As it is shown in the figure above, there's a system of three chambers, each of which has the volume v. Initially there's only A particles in chamber l; B particles in chamber II, and C while wall between chamber ll and Ill is only permeable to particle C. All thhree types of particles can be treated as ideal gases. The number of particles are denoted by NA, NB, NC a)...
1.) (9 points) Give structures for the following compounds: a) meta-phenylphenol b) 6-benzyl-3-heptanol e) ortho-sec-butyltoluene 2.)...
1.) (9 points) Give structures for the following compounds: a) meta-phenylphenol b) 6-benzyl-3-heptanol e) ortho-sec-butyltoluene 2.) (9 points) Name the following compounds: 3.) (8 points) Label the following molecules as aromatic, anti-aromatic, or non-aromatic. For the ones th aren't aromatic, explain why they are either non-aromatic or anti-aromatic. 0.8 4.) (11 points) For the following electrophilic aromatic substitution reaction: Вт, FeBr; a) Which product is the major one? b) Draw a complete mechanism for the formation of the major product...
9. (6 pts) (a) Indicate which curves below correspond to Newtonian, Pseudo plastic (shear thinning, i.e. non-Newtonian) and Shear thickening behavior. (b) Draw the expected viscosity versus shear rate for the three polymer samples in a Single Plot (high molecular wt, medium mol weight and low mol wt). Shear Stress Shear Rate.
An atom has a very small nucleus surrounded by an electron "cloud The figure below repeesents the mucleus with a drameter of about 2 mm and describes the electron cloud as extending over 200 m. If the diameter of an atom is 1 x 10cm, nhat is the approximate diameter of its nucleus? Nudeus with protom (positive electric change) and neutrons nvo electric chargel. Diamete 6 Which of these particles constitute the nucleus of an atom? Select all that apply)...
A very thin wire lies in the xy plane. It has the shape shown below consisting of two circular segments, centered at the origin, which are connected together. There is a current i in the wire as shown. A particle with charge q is at the origin with some velocity in the +x direction. R 2R φ Vo 9 (out of page) If the magnetic field at the origin was measured to be B = - Biv and an external...
6. Which of the following reagents can be used to complete the reaction shown below? CH,CH, CH2-CECH CH,CHCHECH b. H2O with H2SO/HgSo. a. BH, followed by H2O2 d. None of the above. c. O, in CH,COOH 7. Which of the following is the major product of the reaction shown below? pyridine 8. Which of the following aromatic substitution reactions is most likely to give a polysubstituted product with benzene as a reactant? a. Friedel-Crafts Acylation b. Friedel-Crafts Alkylation c. Nitration...
Training Question 3. Shown below is the activity profile for the enzyme phosphofructokinase-1 (PFK-1) which catalyzes the reaction: Fructose 6-phosphate + ATP → fructose 1,6-biphosphate + ADP. Low (ATPI PFK-1 activity High (ATP) [Fructose 6-phosphatel Describe the different patterns of regulation for different ATP levels. Explain the why such regulation is appropriate for this enzyme, given its role in metabolism.
Which of the fatty acids shown below is octadecanoic acid? (3 pts) (a) HO (6) HO C НО" O HO e HO Which of the fatty acids shown below has the lowest boiling point? Why? (3 pts) HO Chemical Formula: C16H3002 (b) HO Chemical Formula: C16H3202 (c) HO Chemical Formula: C16H2802 o (d) HO Chemical Formula: C16H300 e HO Chemical Formula: C18H360
As it is shown in the figure above, there's a system of three chambers, each of which has the volume v. Initially there's only A particles in chamber l; B particles in chamber II, and C while wall between chamber ll and Ill is only permeable to particle C. All thhree types of particles can be treated as ideal gases. The number of particles are denoted by NA, NB, NC a) If none of the particles are chemically active, what...
This question is related to thermal physics by Kittel.
As it is shown in the figure above, there's a system of three chambers, each of which has the volume v. Initially there's only A particles in chamber l; B particles in chamber II, and C while wall between chamber ll and Ill is only permeable to particle C. All thhree types of particles can be treated as ideal gases. The number of particles are denoted by NA, NB, NC a)...
1.) (9 points) Give structures for the following compounds: a) meta-phenylphenol b) 6-benzyl-3-heptanol e) ortho-sec-butyltoluene 2.) (9 points) Name the following compounds: 3.) (8 points) Label the following molecules as aromatic, anti-aromatic, or non-aromatic. For the ones th aren't aromatic, explain why they are either non-aromatic or anti-aromatic. 0.8 4.) (11 points) For the following electrophilic aromatic substitution reaction: Вт, FeBr; a) Which product is the major one? b) Draw a complete mechanism for the formation of the major product...
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