Which of the following oxygen ions are paramagnetic: O1,O2, O2-, O2+?
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Which of the following oxygen ions are paramagnetic: O1,
O2, O2-, O2+?
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- The amino acid alanine has two isomers, α-alanine and β-alanine. When equal masses of these two compounds are dissolved in equal amounts of a solvent, the solution of α-alanine freezes at the lowest temperature. Which form, α-alanine or β-alanine, has the larger equilibrium constant for ionization (HX ⇌ H+ + X−) ?Nitric acid can be produced by the reaction ofgaseous nitrogen dioxide with water.3 NO2(g) + H2O(ℓ) −→2 HNO3(ℓ) + NO(g)If 956 L of NO2 gas react with water, whatvolume of NO gas will be produced? Assume the gases are measured under the sameconditionsWhich of the equations below best represents how excess acid in the blood plasma can be removed in the lungs by breathing? H+ (aq) + 0. 2(g) OH + H₂ CO (aq) OH+ + O (aq) 2(g) → H, CO. H + O₂ (aq) 2(g) 3(aq) 3(aq) → H₂O(g) + CO2(g) + CO2(g) → H₂O H, CO3(aq) → HCO, OH t + HCO3(aq) → H₂ CO3(g) → H₂O(g) (aq) → H, CO3(aq) 3 (aq) + CO2(g) H₂O(g) + CO2(g)
- What mass of citric acid (triprotic, C6H5O7H3) contains 152 mEq of citric acid?The common name for the C4 unbranched dicarboxylic acid is?Using the Nernst equation, calculate the equilibrium potential for Ca2 and for C1 from the following sets of data: a. Given [ Ca2+ ]0=1mM,[ Ca2+ ]i=100nM, find Eca2+ b. Given [ Cl- ]0=110mM,[ Cl- ]i=100mM, find Ecl
- Carbonic anhydrase is an extremely efficient enzyme in red blood cells that performs the essential function of trapping C02 coming out of tissues and hydrating it with H,0. The product of this reaction is which dissociates into a proton and a (Hint: the reaction is H20 + CO2 +„H+ bicarbonate; carbonic acid carbonic acid; carbonate carbonate; carbonic acid carbonate; bicarbonate carbonic acid; bicarbonateCarbon dioxide is dissolved in blood (pH 7.4) to form a mixture of carbonic acid and bicarbonate. Neglecting free CO2, what fraction will be present as carbonic acid? Would you expect a significant amount of carbonate (CO32-)?When a mixture of 3-phosphoglycerate and 2-phosphoglycerate is incubated at 25°C in the presence of the enzyme phosphoglycerate mutase (which catalyzes the intervconversion of the two substances) until equilibrium is reached, the final mixture contains 6 times as much 2-phosphoglycerate as 3-phosphoglycerate. Which of the following statements is most nearly correct when applied to the reaction shown below: 3-phosphoglycerate ------> 2-phosphoglycerate (R=8.315 J/mole.K) A. △G°' = +12.7 kJ/mole B. △G°' = 0 C. △G°' is incalculably large and positive D. △G°' = -4.44 kJ/mole E. △G°' cannot be calculated from the information gven
- 1- 1,3-Bisphosphoglycerate (1,3-BPG) is a phosphoryl group donor during the synthesis of ATP in the reaction: 1,3-BPG + ADP → 3-Phosphoglycerate + ATP In human erythrocytes, the steady-state concentration of ATP is 2.24 mM, that of ADP is 0.25 mM, and that of 3-Phosphoglycerate is 0.15 mM. Calculate the concentration of 1,3-BPG at 25 °C, assuming that the above reaction is at the Equilibrium in the cell, and that the AG° of the reaction is -18.9 kJ/mol. Use R=8.315 J/mol.K and show your work. 2- In fact, the above reaction is maintained in a non-Equilibrium steady state in human erythrocytes; and the AG’ of the reaction is equal to -3.7 kJ/mol in these conditions. Calculate the concentration of 1,3-BPG at 25 °C in this non- Equilibrium steady state. Show your work.The 2-3 phosphoglycerate (BFG) binds to the central gap formed by the hemoglobin monomers (a2b2) facilitating the reversible release of oxygen. Approximate relationships between BFG concentrations in red blood cells and Pos in hemoglobin are in the table.a) Draw the reaction schemeb) Write the forces that condition the union between hemoglobin and BFGDipalmitoylphosphatidylcholine (DPPC) is a surfactant on the surface of the alveoli in the lungs. What is the nature of its fatty acid groups? In what arrangement is it likely to exist at the lung surfaces?