Recent questions in Chemistry

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Determine the standard enthalpy change for the following reaction: Fe2O3(s) + 3CO(g) → 2Fe(s) + 3CO2(g) Given:ΔHf°[Fe2O3(s)] = -824.2 kJ/mol ΔHf°[CO(g)] = -110.5 kJ/mol ΔHf°[Fe(s)] = 0 kJ/mol ΔHf°[CO2(g)] = -393.5 kJ/mol

asked Feb 4 in Chemical thermodynamics by PhoebeAlonzo (490 points)

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Determine the standard enthalpy change for the following reaction: 2 Fe (s) + 3/2 O2 (g) → Fe2O3 (s) Given the following data: - ΔHf° of Fe2O3 (s) = -826 kJ/mol - ΔHf° of O2 (g) = 0 kJ/mol - The heat capacity of the calorimeter is 135 J/°C Assume that the reaction takes place at constant pressure and that the heat absorbed by the calorimeter is negligible.

asked Feb 4 in Chemical thermodynamics by GabrielleYur (370 points)

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Determine the standard enthalpy change for the dissolution of 5.00 grams of magnesium chloride in water, given that the molar mass of MgCl2 is 95.21 g/mol and the standard enthalpy change of formation for magnesium chloride is -641.3 kJ/mol.

asked Feb 4 in Chemical thermodynamics by AveryCoughli (290 points)

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Determine the standard electrode potential, given that the standard reduction potential for the half-reaction, Ag+ (aq) + e- → Ag(s) is +0.80 V and the standard oxidation potential for the half-reaction, Fe(s) → Fe2+(aq) + 2e-, is -0.44 V. Using this information, predict whether or not the reaction Ag(s) + Fe2+(aq) → Fe(s) + Ag+(aq) will occur spontaneously under standard conditions.

asked Feb 4 in Chemical thermodynamics by ZeldaMfp9977 (110 points)

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1 answer 47 views

Determine the rate law for the reaction of nitrogen dioxide with hydrogen gas, if the reaction rate is directly proportional to the concentration of nitrogen dioxide and the square of the concentration of hydrogen gas. Express the rate law in terms of the rate constant and the concentrations of the reactants.

asked Feb 4 in Chemical kinetics by JohnieHatten (410 points)

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Determine the possible isomers of C3H8O using structural formulas and name the type of isomerism for each.

asked Feb 4 in Chemical bonding by ZVWShalanda (350 points)

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Determine the polarity of the H-Cl bond in hydrogen chloride molecule, given the electronegativity values of hydrogen and chlorine to be 2.2 and 3.0, respectively.

asked Feb 4 in Chemical bonding by Miles73G157 (490 points)

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1 answer 42 views

Determine the oxidation state of the following elements in the compound potassium permanganate (KMnO4): a) Potassium b) Manganese c) Oxygen

asked Feb 4 in ElectroChemistry by BeatriceSanm (270 points)

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1 answer 50 views

Determine the oxidation state of the chromium atom in the compound potassium dichromate (K2Cr2O7).

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

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1 answer 52 views

Determine the oxidation state of the carbon atom in the molecule C2H5OH.

asked Feb 4 in Chemical reactions by JadeAshworth (170 points)

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1 answer 59 views

Determine the oxidation state of sulfur in sodium sulfite (Na2SO3) using the oxidation state rules and justify your answer with proper explanation.

asked Feb 4 in ElectroChemistry by LacyBastyan (330 points)

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1 answer 63 views

Determine the oxidation state of sulfur in H2SO4.

asked Feb 4 in Chemical reactions by RosalinaAsht (210 points)

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1 answer 36 views

Determine the oxidation state of each atom in the compound KMnO4.

asked Feb 4 in Chemical reactions by HuldaTesterm (550 points)

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1 answer 42 views

Determine the oxidation state of chlorine in HClO3.

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

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1 answer 82 views

Determine the oxidation state of all elements in the following compound: CoCl<sub>2</sub>•6H<sub>2</sub>O.

asked Feb 4 in Inorganic Chemistry by DannAnstey3 (370 points)

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1 answer 50 views

Determine the number of electrons transferred in the following electrochemical reaction: Cu(s) + 2Ag+(aq) → Cu2+(aq) + 2Ag(s) Show the calculation steps and write the balanced half-reactions with the number of electrons transferred.

asked Feb 4 in ElectroChemistry by DaniReber602 (270 points)

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1 answer 48 views

Determine the molecular geometry of the molecule CH3Cl using the VSEPR theory.

asked Feb 4 in Chemical bonding by ValorieDemar (430 points)

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1 answer 50 views

Determine the molecular geometry and bond angles of a water molecule using the Valence Shell Electron Pair Repulsion (VSEPR) theory.

asked Feb 4 in Quantum Chemistry by LinwoodToome (330 points)

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1 answer 41 views

Determine the molecular geometry and bond angles for the molecule CF4 using the VSEPR theory.

asked Feb 4 in Quantum Chemistry by IsidroKump49 (370 points)

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1 answer 42 views

Determine the maximum monolayer coverage of nitrogen gas on a silver surface in Langmuir units if the partial pressure of nitrogen gas is 2.5 atm at 298 K. The area per molecule of nitrogen adsorbed on the silver surface is known to be 1.55×10^-19 m^2 according to experimental data.

asked Feb 4 in Surface Chemistry by LatanyaFulch (290 points)

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