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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 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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Considering the reaction 2SO3(g) ⇌ 2SO2(g) + O2(g) at equilibrium. If the concentration of SO2(g) is increased by adding more SO2(g), what will be the direction of the reaction and how will it affect the concentrations of S03(g), SO2(g), and O2(g)?

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

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Consider a closed system undergoing an irreversible expansion at constant pressure, calculate the change in entropy of the system if the initial and final volumes are V1 and V2, respectively, and assuming ideal gas behavior.

asked Feb 3 in Physical Chemistry by KennyFerro8 (710 points)

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How does changing the pH of a solution affect the formation of a complex ion using the example of [Cu(H2O)6]2+ forming [Cu(NH3)4(H2O)2]2+ at different pH values? Provide an explanation based on Le Chatelier's principle.

asked Feb 3 in Chemical equilibrium by YMPViola5184 (450 points)

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How does changing the concentration of reactants affect the rate and sustainability of a specific chemical reaction? Provide experimental evidence to support your answer.

asked Feb 3 in Chemical kinetics by CharmainCast (410 points)

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What is the effect of changing the concentration of reaction intermediates on the rate of the chemical reaction?

asked Feb 3 in Chemical kinetics by ChristyBenja (710 points)

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What is the effect of changing the concentration of one reactant on the equilibrium constant of a reaction with a known rate?

asked Feb 3 in Chemical kinetics by DanaLanham1 (450 points)

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Consider the chemical reaction A(g) + B(g) ↔ 2C(g). At equilibrium, the concentration of A is 0.25 M, the concentration of B is 0.15 M, and the concentration of C is 0.40 M. What is the equilibrium constant for this reaction at the given temperature?

asked Feb 3 in Chemical equilibrium by DomingoMarce (430 points)

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How does changing the temperature affect the conformation of a polymer chain in a Monte Carlo simulation?

asked Feb 3 in Computational Chemistry by ArlenRosetta (350 points)

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How does changing the pH affect the equilibrium constant (Kf) for the formation of Fe(CN)6 4- complex ion in a solution containing Fe3+ and CN- ions? Provide a detailed explanation of the effect of pH on the equilibrium constant for the reaction.

asked Feb 3 in Chemical equilibrium by IQELynette76 (230 points)

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Consider the following redox reaction:Cu(s) + 2Ag+(aq) → Cu2+(aq) + 2Ag(s)Calculate the standard free energy change (ΔG°) for the reaction at 298K, given that the standard reduction potentials for Cu2+(aq)/Cu(s) and Ag+(aq)/Ag(s) are +0.34V and +0.80V, respectively.

asked Feb 3 in Chemical thermodynamics by EnriqueCaudi (250 points)

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What is the effect of changing the concentration of reactants and products on the equilibrium constant and reaction rate of a chemical reaction?

asked Feb 3 in Chemical kinetics by PeteHalpern (570 points)

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How does changing the molecular weight of polyethylene affect its mechanical properties, specifically in terms of its use as a biomaterial for joint replacements?

asked Feb 3 in Materials Chemistry by FredAfford68 (310 points)

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Calculate the standard enthalpy change for the neutralization reaction between hydrochloric acid and sodium hydroxide, given the balanced chemical equation: HCl(aq) + NaOH(aq) → NaCl(aq) + H2O(l) and the enthalpy change of formation values: ∆Hf°(NaCl(aq)) = -407.3 kJ/mol ∆Hf°(H2O(l)) = -285.83 kJ/mol ∆Hf°(HCl(aq)) = -167.2 kJ/mol ∆Hf°(NaOH(aq)) = -469.11 kJ/mol

asked Feb 3 in Chemical thermodynamics by ArdenQpv8725 (470 points)

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Calculate the standard enthalpy change for the vaporization of 1 mole of water at 100°C and 1 atm pressure. The enthalpy of formation of liquid water is -285.8 kJ/mol and the enthalpy of formation of water vapor is -241.8 kJ/mol.

asked Feb 3 in Chemical thermodynamics by JacquelynP76 (370 points)

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How does changing the mass of the atoms in a molecule affect its vibrational frequencies and infrared spectra, and how can quantum chemistry calculations be used to predict these changes?

asked Feb 3 in Quantum Chemistry by LKVVirgie254 (470 points)

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1 answer 19 views

How does changing the concentration of reactants affect the reaction rate in the chemical reaction between hydrochloric acid and magnesium?

asked Feb 3 in Chemical kinetics by GQABrian353 (450 points)

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Calculate the rate constant at 300 K for a gas phase reaction with a rate of 0.025 M/s and an initial concentration of 0.10 M. The reaction is second order in the concentration of reactants.

asked Feb 3 in Physical Chemistry by HamishWrench (350 points)

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Calculate the standard enthalpy change (∆H°) for the neutralization reaction of 50.0 mL of 0.100 M HCl with 75.0 mL of 0.0750 M NaOH at a constant pressure of 1 atm and a temperature of 25°C.

asked Feb 3 in Chemical thermodynamics by EthelGrissom (430 points)

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