Use the thermodynamic arguement to explain why the perfectly folded protein is only marginally stable compared to its unfolded form.
Use the same equation to explain why higher temperatures denature proteins.
Which of the weak forces is the most important in the overall protein stability?
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How does the packing found inside a fractional column work to separate a mixture of two components?
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Using your average Keq value (.3948), please calculate what the equilibrium concentrations of Fe3+ , SCN- , and FeSCN2+ in a solution made by combining 10.00mL of 0.0020M Fe(NO3)3 and 10.00mL of 0.0020M KSCN.
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Explain the effects of each of the following on the rates of gluconeogenesis and/or glycolysis.
A. Increasing the concentration of blood glucose.
B. Increasing the concentration of glucose-6-phosphate.
C. Increasing the concentration of fructose-1,6-bisphosphate.
D. Increasing the levels of ATP.
E. Increasing the concentration of AMP.
F. Decreasing the concentration of fructose-2,6-bisphosphate
G. Increasing the concentration of acetyl CoA
H. Increasing the concentration of citrate.
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3/ At 2000 K , nitrogen gas and oxygen gas combine to form nitric oxide according to the following reaction: N2(g) + O2(g) ⇌ 2NO(g) ΔH = +1.81 KJ
with an equilibrium constant K of 4.1 x 10^-4. If 0.50 mole of N2 and 0.86 mole of O2 are put into a 2.0 L container at 2000 K , what would the equilibrium concentrations of all species be ?
4/ For the reaction in question #3. How would the following changes effect the equilibrium ? Each change occurs independently of the others. Increase temperature. Decrease pressure. Decrease [O2(g)]. Increase [NO(g)]
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Calculate the pH for each of the following cases in the titration of 50.0 mL of 0.140 M HClO(aq) with 0.140 M KOH(aq). The ionization constant for HClO is 4.0x10^-8. (a) before addition of any KOH (b) after addition of 25.0 mL of KOH (c) after addition of 35.0 mL of KOH (d) after addition of 50.0 mL of KOH (e) after addition of 60.0 mL of KOH
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Part A
A volume of 105 mL of H2O is initially at room temperature (22.00 ∘C). A chilled steel rod at 2.00 ∘C is placed in the water. If the final temperature of the system is 21.00 ∘C , what is the mass of the steel bar?
Use the following values:
specific heat of water = 4.18 J/(g⋅∘C)
specific heat of steel = 0.452 J/(g⋅∘C)
| please show work |
Part B
The specific heat of water is 4.18 J/(g⋅∘C). Calculate the molar heat capacity of water?
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What is the molarity of a solution of s2o32- if 58 ml were required to titrate 42 ml of a 0.2M solution of IO3-
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A) Does the pH increase, decrease or remain the same on the addition of the of the following?
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B) Which of the following (select all that apply) gives a buffer solution when equal volumes of the two solutions are mixed?
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0.10 M HF and 0.10 M NaF |
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0.10 M HF and 0.10 M NaOH |
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0.50 M HF and 0.25 M NaOH |
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0.25 M HCl and 0.50 M NaF |
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Fluoride Selective Ion Electrode. Describe how a fluoride selective ion electrode measures the fluoride ion concentration and explain why the potential approaches 0 at high concentrations
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7. Given the standard reduction potential for the following two half-cell reactions (in the presence of 1.00 M HCl):
Fe3+ + e <==> Fe2+, E0 = + 0.68 V
AsO4 - + 2H+ + 2e <==> AsO3 - + H2O, Eo = +0.559 V.
Please calculate the system potential at the equivalence point when Fe3+ was used to titrate AsO3 - in the presence of 1.00 M HCl.
Answer: 0.60 V
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5. For the titration of 50.00 mL of 0.0500 M Ce4+ with 0.1000 M Fe2+ in the presence of 1 M H2SO4, please calculate the system potential while 3.00 mL of Fe2+ is added.
Ce4+ + e <==> Ce3+, E0 = + 1.44 V (in 1 M H2SO4)
Fe3+ + e <==> Fe2+, E0 = + 0.68 V (in 1 M H2SO4).
Answer is 1.49 V
5b) In the above titration, what's the electrode potential after 28.90 mL of Fe2+ is added?
Answer is 0.73 V.
Just wondering, how they got that?
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1,All of the following are true concerning nuclear fission except
a) Uranium is typically split into smaller atoms
b) Nuclear reactors are used to make electricity
c) The energy involved can be calculated using E = mc2
d) The reaction involved is called a thermonuclear reaction
e) During fission there is a change in mass called the mass defect
2,
All of the following are true concerning nuclear fusion except
| a)Typically hydrogen is fused together to form helium | |
| b) The amount of hydrogen needed to achieve this is called the critical mass | |
| c) At this time there have been no economically successful fusion reactors created | |
| d )Fusion requires extremely high temperatures | |
| e) Nuclear fusion is the process that powers the sun |
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Which of the following salts would be more soluble in acid solution than in pure water?
PbBr2
AgNO3
SrCl2
AgI
Please provide a thorough explanation as I was absent during this lecture... Thank you!!
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