Recent questions in Chemistry

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Given the inorganic compound Mg(ClO)2, predict its stability based on the characteristics of its constituent atoms and molecular geometry.

asked Feb 4 in Inorganic Chemistry by KitCollings3 (270 points)

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1 answer 57 views

Given the following unbalanced chemical equation: Fe + HCl → FeCl3 + H2, what is the balanced equation for the reaction and how many moles of hydrogen gas will be formed when 0.25 moles of Fe react with an excess of HCl?

asked Feb 4 in Chemical reactions by ZeldaSchlunk (350 points)

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Given the following reaction at standard conditions:Cu(s) + 2Ag+(aq) -> Cu2+(aq) + 2Ag(s) Calculate the cell potential, E°cell, at 25°C using the standard reduction potentials:Cu2+(aq) + 2e- -> Cu(s), E°red = +0.34 VAg+(aq) + e- -> Ag(s), E°red = +0.80 V

asked Feb 4 in ElectroChemistry by OliveHutton (290 points)

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1 answer 57 views

Given the following information: A polymerization reaction has a heat of reaction of -150 kJ/mol and a Δn (change in moles of gas) of +2 moles gas/mol. If 5.0 g of the monomer is polymerized, what is the enthalpy change (in kJ) for the overall reaction?

asked Feb 4 in ThermoChemistry by JonnieBonet (470 points)

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Given the following half-reactions:Cu²⁺ (aq) + 2e⁻ → Cu (s) E° = +0.34 VAg⁺ (aq) + e⁻ → Ag (s) E° = +0.80 VWhat is the cell potential for the reaction when a copper electrode is paired with a silver electrode in a standard electrochemical cell?

asked Feb 4 in ElectroChemistry by KarriWalpole (350 points)

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1 answer 37 views

Given the following half-reactions:Cu2+ (aq) + 2 e- -> Cu (s) E° = +0.34 VZn2+ (aq) + 2 e- -> Zn (s) E° = -0.76 VCalculate the equilibrium constant (K) for the reaction: Cu2+ (aq) + Zn (s) -> Zn2+ (aq) + Cu (s)

asked Feb 4 in ElectroChemistry by OnitaLerner (410 points)

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Given the following equilibrium reaction: Fe3+(aq) + 4CN-(aq) <--> Fe(CN)64-(aq)If the equilibrium constant, Kc, is equal to 1.2 x 10^10 at 25°C, what will be the value of Kc at 50°C? And how will the equilibrium position shift when the temperature is changed from 25°C to 50°C?

asked Feb 4 in Chemical equilibrium by MiraMalley50 (470 points)

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Given the following equations and their respective enthalpy changes:1) 2H2 (g) + O2 (g) → 2H2O (l) ΔH = -484 kJ/mol 2) C2H5OH (l) + 3O2 (g) → 2CO2 (g) + 3H2O (l) ΔH = -1,367 kJ/mol 3) C2H5OH (l) → C2H4 (g) + H2O (g) ΔH = +44 kJ/mol Using Hess’s Law, determine the ΔH for the following reaction: C2H5OH (l) → 2CO2 (g) + 3H2 (g)

asked Feb 4 in Chemical reactions by RufusKasper2 (450 points)

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1 answer 52 views

Given the following electrochemical reaction: Cu(s) + 2 Ag+(aq) → Cu2+(aq) + 2 Ag(s)Calculate the cell potential at standard conditions (298 K, 1 atm, 1 M concentrations).

asked Feb 4 in ElectroChemistry by IeshaBelgrav (150 points)

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1 answer 38 views

Given the following electrochemical equation:Cu(s) | Cu²⁺(aq, 0.0100 M) || Cr³⁺(aq, 1.00 M) | Cr(s)At 298 K, the standard reduction potential for Cu²⁺/Cu is +0.34 V and for Cr³⁺/Cr is -0.74 V. Calculate the equilibrium constant (K) for the above electrochemical reaction.

asked Feb 4 in ElectroChemistry by BethWillason (270 points)

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1 answer 51 views

Given the following data for the electrochemical reaction A + B → C, where A and B are electrons:- The anodic Tafel slope is 50 mV per decade of current density.- The cathodic Tafel slope is 70 mV per decade of current density.Calculate the exchange current density (i0) for the reaction.

asked Feb 4 in ElectroChemistry by NidiaRagland (290 points)

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1 answer 28 views

Given the equilibrium reaction: 2NOCl(g) ⇌ 2NO(g) + Cl2(g), if the equilibrium constant (Kc) at 25°C is 2.45 x 10^-3, what will be the new value of Kc if the temperature is increased to 50°C?

asked Feb 4 in Chemical equilibrium by TraceyEhrlic (250 points)

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1 answer 56 views

Given the equilibrium equation N2(g) + 3H2(g) ⇌ 2NH3(g), if the concentration of N2 is increased by 0.2 M while the temperature is held constant, what will be the effect on the equilibrium concentration of NH3?

asked Feb 4 in Chemical equilibrium by GenieTew3704 (230 points)

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1 answer 45 views

Given the enthalpy of solution of sodium hydroxide (NaOH) is -44.5 kJ/mol and the enthalpy of solution of hydrochloric acid (HCl) is -74.8 kJ/mol, calculate the enthalpy change for the precipitation reaction between NaOH and HCl, assuming all solutions are at a concentration of 1 M.

asked Feb 4 in ThermoChemistry by SofiaCarandi (330 points)

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1 answer 52 views

Given the electrochemical reaction Zn(s) + Cu2+(aq) → Zn2+(aq) + Cu(s), calculate the standard cell potential at 25°C if the standard reduction potentials are E°(Cu2+/Cu) = 0.34 V and E°(Zn2+/Zn) = -0.76 V.

asked Feb 4 in ElectroChemistry by ShellyGiron1 (290 points)

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1 answer 56 views

Given the chemical equation: N2 + 3H2 <-> 2NH3 and an initial concentration of N2 as 0.1M, H2 as 0.2M, and NH3 as 0. Calculate the equilibrium concentrations of each component at 298K if the reaction is exothermic and the pressure is increased. (Hint: Use Le Chatelier's principle to determine the direction of the shift and then use an ICE table to calculate the concentrations at equilibrium)

asked Feb 4 in Chemical reactions by JennyCouch7 (410 points)

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1 answer 53 views

Given the chemical equation for the oxidation of iron (Fe) to form iron(III) oxide (Fe2O3), determine the oxidation state of iron in both the reactant and product.

asked Feb 4 in Chemical reactions by KayWhittingt (430 points)

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1 answer 43 views

Given the balanced equation for the electrochemical reaction: Cu(s) + 2AgNO3(aq) → Cu(NO3)2(aq) + 2Ag(s)Calculate the number of electrons transferred per copper atom during this reaction when a current of 5.00 A is passed for 6.00 minutes through a cell containing a copper electrode and a silver electrode with a silver ion concentration of 0.100 M.

asked Feb 4 in ElectroChemistry by GuyLithgow70 (450 points)

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1 answer 47 views

Given the balanced chemical equation: C6H12O6 + 6O2 -> 6CO2 + 6H2O The enthalpy of formation of glucose is -1273 kJ/mol and the enthalpy of formation of water is -286 kJ/mol. Calculate the enthalpy change of the oxidation of glucose in kJ/mol.

asked Feb 4 in ThermoChemistry by STNStephen01 (250 points)

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1 answer 26 views

Given the balanced chemical equation: 2NO(g) + O2(g) ⇌ 2NO2(g)At a certain temperature, the concentrations of NO, O2, and NO2 are 0.4 M, 0.1 M, and 0.3 M respectively. What is the reaction quotient (Qc) for this chemical reaction? Is the reaction at equilibrium or not? If not at equilibrium, which direction will it shift to reach equilibrium?

asked Feb 4 in Chemical thermodynamics by LindsayI610 (190 points)

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