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Considering carbohydrate metabolism and regulation in the human body, how does the regulation of glycolysis and gluconeogenesis work to maintain blood glucose levels during periods of fasting or intense exercise? Include both the enzymes involved and the hormonal regulation mechanisms in your answer.

asked Feb 3 in BioChemistry by AnnmarieMcCl (550 points)

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Calculate the standard enthalpy change for the combustion of ethene gas (C2H4(g)) to form carbon dioxide gas (CO2(g)) and water vapor (H2O(g)), given the following thermochemical equations: C2H4(g) + 3O2(g) → 2CO2(g) + 2H2O(g) ΔH°=-1411 kJ/mol2H2(g) + O2(g) → 2H2O(g) ΔH°=-484 kJ/mol

asked Feb 3 in Chemical thermodynamics by Edward211098 (590 points)

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Consider two coordination compounds, [Co(NH3)4Cl2] and [Co(NH3)5Cl] with the same formula weight but different physical properties. Explain the type of isomerism present in each compound, draw their structures and identify which compound exhibits optical isomerism.

asked Feb 3 in Coordination Chemistry by RosemarySegu (250 points)

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Consider a chemical reaction in which X and Y combine to form XY at equilibrium: X + Y ⇌ XY The equilibrium constant for the reaction is Kc = 1.2x10^-4. Initially, [X] = 0.2 M and [Y] is unknown. If 0.1 M of Y is added to the reaction mixture, what will be the new equilibrium concentration of XY?

asked Feb 3 in Chemical equilibrium by BridgettFait (410 points)

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Consider the synthesis of ibuprofen, a common pain reliever. Starting with benzene and propene, propose a detailed retrosynthesis of ibuprofen. Include all necessary reagents and reaction steps, as well as any potential issues with the synthesis pathway.

asked Feb 3 in Organic Chemistry by DottyNealy1 (390 points)

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Consider the reaction: 2NOBr(g) <=> 2NO(g) + Br2(g), which has an equilibrium constant of 1.5 x 10^-5 at a certain temperature. If you start with 0.10 M of NOBr and let the reaction reach equilibrium, find the equilibrium concentrations of NOBr, NO, and Br2.

asked Feb 3 in Chemical equilibrium by MalindaLemie (310 points)

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Consider the reaction: N2(g) + 3H2(g) ⇌ 2NH3(g)If the reaction mixture initially contains 0.10 mol N2, 0.20 mol H2 and 0.15 mol NH3 at equilibrium at 450 K, and the number of moles of NH3 is increased to 0.25 mol at constant temperature, predict the direction in which the reaction will proceed to reach a new equilibrium.

asked Feb 3 in Chemical equilibrium by JulianneRoac (370 points)

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Consider the reaction: 2H2(g) + O2(g) → 2H2O(g) ΔH= −483.6 kJ/molAt constant temperature and pressure, 4 moles of hydrogen and 2 moles of oxygen are allowed to react. What is the maximum amount of work that can be obtained from this reaction?

asked Feb 3 in Physical Chemistry by Hai18V559862 (370 points)

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Consider the reaction of hydrogen gas (H2) and iodine gas (I2) to form hydrogen iodide (HI) at a certain temperature. If the initial concentrations of hydrogen and iodine are [H2] = 0.5 M and [I2] = 0.3 M, and the equilibrium concentration of hydrogen iodide is [HI] = 0.1 M, what is the value of the reaction quotient (Qc) for this reaction at this temperature?

asked Feb 3 in Chemical thermodynamics by TrishaSutton (370 points)

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Consider the reaction N2O4(g) ⇌ 2NO2(g) which is exothermic. If the pressure of the system is increased, predict the direction in which the equilibrium will shift, and explain your answer using Le Chatelier's principle.

asked Feb 3 in Chemical reactions by AnnabelleHed (450 points)

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Consider the reaction A + B ⇌ C + D, which has an equilibrium constant of 2.0 x 10^-3 at a given temperature. Initially, 0.10 mol of A and 0.20 mol of B are placed in a flask. Calculate the equilibrium concentrations of all species in the flask.

asked Feb 3 in Chemical equilibrium by GeriFarquhar (290 points)

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Consider the molecule ozone (O3). Draw all possible resonance structures for ozone and explain how the resonance helps to stabilize the molecule.

asked Feb 3 in Chemical bonding by CarmaDelling (470 points)

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Consider the following unbalanced chemical equation: Fe + HCl → FeCl3 + H2 A student needs to balance this chemical equation in order to determine the coefficients of each reactant and product. What are these coefficients, and how did you arrive at them?

asked Feb 3 in Chemical reactions by AlannahArand (370 points)

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Consider the following reactions:1. Mg(s) + 2HCl(aq) → MgCl₂(aq) + H₂(g) ΔH₁ = -454.9 kJ/mol2. MgO(s) + 2HCl(aq) → MgCl₂(aq) + H₂O(l) ΔH₂ = -131.3 kJ/mol3. H₂(g) + ½O₂(g) → H₂O(l) ΔH₃ = -285.8 kJ/molUsing Hess's Law, calculate the enthalpy change for the following reaction:MgO(s) + 2HCl(aq) → MgCl₂(aq) + H₂(g) given that the enthalpy change for the reaction Mg(s) + ½O₂(g) → MgO(s) is ΔH = -601.6 kJ/mol.

asked Feb 3 in ThermoChemistry by Troy33809250 (530 points)

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Design a chemical reactor for the production of 1000 kg per hour of ammonia through the Haber process, given a feedstock gas composition of nitrogen and hydrogen in a 3:1 molar ratio, and operating conditions of 450°C at 100 bar pressure. Determine the reactor size and necessary input flow rates of reactants, and identify any key design considerations that need to be taken into account.

asked Feb 3 in Chemical engineering by RhodaKonig1 (550 points)

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Consider the following reaction at 298 K:CO(g) + H2O(g) ⇌ CO2(g) + H2(g)Where the initial concentrations of CO and H2O are 0.2 M and 0.1 M, respectively. Calculate the reaction quotient, Qc, for this reaction. Is the reaction at equilibrium or not? If not, in which direction will the reaction tend to proceed to reach equilibrium?

asked Feb 3 in Chemical thermodynamics by CorinneMcwho (350 points)

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Consider the chemical reaction between sodium hydroxide (NaOH) and hydrochloric acid (HCl) to produce sodium chloride (NaCl) and water (H2O). Write a balanced chemical equation for this reaction and determine the mole ratio of NaOH and HCl required for complete reaction. If we start with 10 grams of NaOH and 20 grams of HCl, determine which is the limiting reagent, the amount of excess reagent left over, and the mass of NaCl and H2O produced.

asked Feb 3 in Inorganic Chemistry by STNStephen01 (390 points)

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Consider the chemical equation: Fe + H2SO4 → FeSO4 + H2 What is the coefficient of Fe when the equation is balanced using the smallest whole number coefficients?

asked Feb 3 in Chemical reactions by AlexHgd21519 (370 points)

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Consider a weak acid, HA, with a dissociation constant, Ka = 1.8 x 10^-5. What will be the effect on the concentration of [H3O+] and the degree of ionization of the acid if 0.1 moles of HCl is added to 1 liter of a 0.1 M solution of HA?

asked Feb 3 in Chemical equilibrium by GeriDibble17 (210 points)

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Consider a system that consists of water and sodium chloride (NaCl) at room temperature and atmospheric pressure. The student is asked to determine the minimum amount of NaCl that needs to dissolve in 100 grams of water in order to form a saturated solution. The student should also calculate the molar solubility of NaCl in the solution.

asked Feb 3 in Physical Chemistry by RodneyC3252 (310 points)

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