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Calculate the bond order and bond length of the nitrogen-oxygen bond in the NO molecule using molecular orbital theory.

asked Jan 23 in Inorganic Chemistry by Marilynn3793 (2.1k points)

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1 answer 83 views

A chemistry student needs to determine the effect of increasing temperature on the equilibrium position of a chemical reaction in which an exothermic reaction is taking place. Given the balanced chemical equation A + B ⇌ C + heat, the student needs to determine how the concentration of products and reactants will change as the temperature is increased, and explain the observed changes using Le Chatelier's principle.

asked Jan 22 in Chemical reactions by MackMurry86 (2.2k points)

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1 answer 75 views

A student needs to determine the concentration of a sulfuric acid solution using a sodium hydroxide solution of known concentration. The student performs a titration and records that it took 27.5 milliliters of the sodium hydroxide solution to neutralize 25 milliliters of the sulfuric acid solution. What is the concentration (in moles per liter) of the sulfuric acid solution?

asked Jan 22 in Chemical reactions by DorieEverson (2.0k points)

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A chemistry student needs to determine the effect of an increase in temperature on the equilibrium concentration of products and reactants for the reaction N2(g) + 3H2(g) ⇌ 2NH3(g). Calculate the new concentration of NH3 at equilibrium when the temperature is raised from 300 K to 400 K.

asked Jan 22 in Chemical equilibrium by FilomenaWago (1.8k points)

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1 answer 47 views

Based on the intermolecular forces present in a substance, predict which substance would have a higher boiling point: methane or ethane?

asked Jan 23 in Chemical bonding by EffieQkd6688 (1.7k points)

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1 answer 44 views

Calculate the bond energy of O-O bond in a molecule of oxygen gas (O$_2$) given that the dissociation energy required to break this bond is 498 kJ/mol.

asked Jan 23 in Chemical reactions by ClaritaSifue (1.8k points)

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1 answer 84 views

A chemistry student is asked to find the standard cell potential for the redox reaction: Mg(s) | Mg²⁺(aq, 0.1 M) || Cu²⁺(aq, 0.01 M) | Cu(s) Given that the standard potential for the reduction of Mg²⁺ is -2.37 V and for the reduction of Cu²⁺ is +0.34 V. The student should show how to calculate the cell potential and determine if the reaction will proceed spontaneously or not.

asked Jan 22 in ElectroChemistry by TrudiMarron (1.6k points)

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1 answer 71 views

A student wants to prepare polyethylene using the radical polymerization process. The monomer used is ethylene, and the reaction occurs at a temperature of 60°C. The initiator used is benzoyl peroxide. The student wants to know the enthalpy change that occurs during the polymerization process. How can the student calculate the enthalpy of polymerization using the given information?

asked Jan 22 in ThermoChemistry by 540252730007 (1.9k points)

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1 answer 79 views

A chemistry student wants to create a buffer solution with a pH of 7.2 using acetic acid and sodium acetate. The student has calculated that they need 0.1 moles of each component to make a 250 mL buffer solution. However, the student accidentally added 0.02 moles of hydrochloric acid to the buffer solution. Calculate the new pH of the buffer solution and explain if the addition of the hydrochloric acid has shifted the equilibrium position of the reaction towards the acid or the base.

asked Jan 22 in Chemical equilibrium by ElidaHaskins (1.7k points)

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1 answer 115 views

Balance the following chemical equation of an inorganic compound: Fe2O3 + CO → Fe + CO2

asked Jan 21 in Inorganic Chemistry by DwainCarlisl (2.0k points)

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1 answer 79 views

A chemistry student wants to calculate the enthalpy change (∆H) upon hydrolysis of magnesium chloride (MgCl2). The student knows that the enthalpy of formation (∆Hf) of MgCl2 is -641 kJ/mol and the enthalpy of formation of water (∆Hf) is -286 kJ/mol. The balanced chemical equation for the hydrolysis of magnesium chloride is MgCl2 + 2H2O → Mg(OH)2 + 2HCl. Calculate the enthalpy change (∆H) of this reaction.

asked Jan 22 in ThermoChemistry by KrystleFarth (1.7k points)

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1 answer 75 views

A student is given a sample of an inorganic compound that contains only carbon and hydrogen. The sample has a mass of 0.500 g and, upon combustion, produces 1.442 g of carbon dioxide and 0.589 g of water. Determine the empirical formula of the compound.

asked Jan 22 in Inorganic Chemistry by CorneliusU11 (1.7k points)

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1 answer 84 views

A chemistry experiment involves burning a sample of propane gas, C3H8, and measuring the heat released. If 2.00 grams of propane is burned completely to produce CO2(g) and H2O(l), and the heat of combustion is found to be -2044 kJ/mol, what is the heat released in kJ when 2.00 grams of propane is burned?

asked Jan 22 in ThermoChemistry by SteveAdamson (1.7k points)

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1 answer 83 views

A Chemistry student is trying to determine the effect of changing the volume on the equilibrium position of a chemical reaction at constant temperature. If the reaction is initially in equilibrium in a 1 L container with a concentration of [X] = 0.10 M and [Y] = 0.20 M, and then the volume is decreased to 0.4 L, what will be the new equilibrium concentrations of X and Y at the new volume?

asked Jan 22 in Chemical equilibrium by AshleighTheo (1.8k points)

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1 answer 82 views

A chemistry student needs to determine the equilibrium constant (Kc) for the reaction: N2(g) + 3H2(g) ⇌ 2NH3(g)At a certain temperature, 0.2 mole of nitrogen gas (N2), 0.3 mole of hydrogen gas (H2), and 0.4 mole of ammonia gas (NH3) were placed in a 1 L container. Using these initial concentrations, what is the equilibrium constant (Kc) for the reaction?

asked Jan 22 in Chemical equilibrium by KristalDmb02 (1.6k points)

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1 answer 82 views

A chemistry student needs to determine the enthalpy of oxidation of magnesium. For this, they need to conduct an experiment in which they react 1 gram of magnesium metal with excess hydrochloric acid of 2 moles concentration. They need to measure the temperature change that occurs during the reaction, which they will use to calculate the enthalpy of oxidation of magnesium. What is the enthalpy of oxidation of magnesium according to the student's experiment?

asked Jan 22 in ThermoChemistry by WhitneyCarey (1.8k points)

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1 answer 83 views

A chemistry student is required to determine the cathodic and anodic Tafel slopes for a reaction occurring at an electrode surface. The current density at the cathodic surface is known to be 1.8 mA/cm² and the current density at the anodic surface is known to be 1.2 mA/cm². The current potential relationship is given by the Tafel equation:log (i) = log (i0) + β_c * (E-E_c) for cathodic reactionlog (i) = log (i0) + β_a * (E-E_a) for anodic reactionWhere i is the current density, i0 is the exchange current density, β_c and β_a are the cathodic and anodic Tafel slopes respectively, E is the elect

asked Jan 22 in ElectroChemistry by AugustBranno (2.5k points)

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1 answer 83 views

A chemistry student is provided with a mixture of two chemicals, A and B, but the quantity of each chemical is unknown. The student uses mass balance calculations to determine the mass of each component in the mixture. Chemical A has a molecular weight of 100 g/mol, while chemical B has a molecular weight of 120 g/mol. If the mixture contains 10% more of chemical A by mass than chemical B, what is the mass of each component in the mixture?

asked Jan 22 in Analytical Chemistry by MatthewStore (1.3k points)

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1 answer 83 views

A chemistry student is given a sample of an unknown salt consisting of a mixture of two compounds. The student is asked to determine the percentage composition of each compound in the salt using mass balance calculations. The total mass of the sample is 10 grams, and after performing careful analysis, the student obtains the following data: One compound has a molar mass of 80 g/mol and comprises 60% of the total mass of the salt. The other compound has a molar mass of 120 g/mol and comprises 40% of the total mass of the salt. What are the percentage compositions of each compound in the salt?

asked Jan 22 in Analytical Chemistry by RosieBloom03 (1.8k points)

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1 answer 82 views

A chemistry student is studying the Langmuir adsorption isotherm and wants to determine the monolayer coverage of a gas adsorbed on a solid surface. The student measures the amount of gas adsorbed at various pressures and at a constant temperature of 298 K. Using the Langmuir adsorption isotherm equation, what is the monolayer coverage of the gas on the surface at this temperature?

asked Jan 22 in Surface Chemistry by LouiePartrid (1.8k points)

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