NADH and FADH2 are often considered “energy currency” in
cellular metabolism because they are generated
directly from Glycolysis and the TCA cycle. Using the following
half-cell potentials, calculate the Gibbs Free Energy
that can be derived from the oxidation of NADH and FADH2. Use the
Faraday Constant at 96,500 J/V mol.
FAD + 2H+ +2 e- = FADH2 Eo = -0.219V
NAD+ + H+ + 2 e- = NADH Eo = -0.320V
a. 21.3 and 30.8 kJ/mol
b. -21.3 and -30.8 kJ/mol
c. 42.3 and 61.8 kJ/mol
d. -42.3 and -61.8 kJ/mol
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A 150.0 mL gas tank contains 51.2 g of oxygen gas and 32.6 g helium gas. What is the total pressure in the tank? What is the partial pressure of oxygen?
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A. Calculate the solubility of silver chloride in a solution that is 0.150.
B. 120.0 −mL sample of a solution that is 2.8×10−3 M in AgNO3 is mixed with a 225.0 −mL sample of a solution that is 0.11 M in NaCN.
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Explain why mixing of a D4h component in with a Td ground state lowers the magnetic moment in nickel(II) complexes.
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I need some practice questions for Stoichiometry. The software my class uses for reviewing is mediocre at best. HELP! please lol
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What is the molar concentration of Na+ ions in 0.015 M solutions of the following sodium salts in water?
(a) NaBr
(b) Na2SO4
(c) Na3PO4
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How do you calculate the molarity of 40 mL of 0.1M acetic acid (HC2H3O2) solution if 12.76 mL 0.35 NaOH was added to reach the equivalence point?
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Calculate the [Ag+] in a solution prepared by dissolving 1.00g of AgNO3 and 10.0g KCN in enough water to make a 1.00 L of solution Kf[Ag(CN)2]1-=1.0 x 1021
Answer: [Ag+] = 2.9 x 10-22M
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3. Recall the steel phase diagram where ferrite iron had a max C
solid solubility of 0.022 wt% Cbut austenite could take up to 2.14
wt% C! The carbon solubility in iron varies dramatically
between the different phases. Explain why demonstrating with a
calculation (hint: austenite isFCC whereas ferrite is BCC
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Given: 50 ml of 0.2 M weak acid is titrated with 0.2M NaOH. The pka of the acid is 4.7
1. What is the pH at the equivalence point?
2. What is the ph when 60ml of NaOH is added? (Total Amt of NaOH is 60ml)
3. What is the pH when 10ml of NaOH is added?
4. What would be the approximate ph of a 0.1 M NaCl solution?
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1. The carboxylic acid group of an amino acid has a pKa of approximately 2. However, carboxylic acids like benzoic acid and acetic acid have pKas in the range of 4-5 pKa units. Explain why the carboxylic acid of an amino acid is more acidic.
2. Consider the amino acid arginine: a. At physiological pH (pH = 7.4), what is the predominant form in solution? b. What percent of the carboxylic acid group is ionized at this pH? c. What percent of the amino group is ionized at this pH?
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For a magnesium fluoride, MgF2, Ksp= 6.4x10^-9, calculate the molar solubility in pure water.
Calculate the molar solubility in 0.050 M NaF solution.
Please show step by step instructions, thank you!
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How much heat is required to convert 84.9 g of ice at -17.0 C to steam at 114 C?
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What mass of Cu(OH)2 (MM= 97.56 g/mol) will dissolve in ,500 L of a pH solution (Ksp=2.2*10 ^=20). In which solution is Cu(OH)2 most soluble and least soluble: A. .01 M NaCl, B. .01M CuCl2, C. .01 HCL, or D. .01NaOH.
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Consider the equation: 3CuO(s)+2NH3(g)--->N2(g)+3Cu(s)+3H2O(l)
How many moles of nitrogen gas could be made from:
a) 5.00 Mol CuO and 2.00 mol NH3
b) 6.00 mol CuO and 6.00 mol NH3
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