Recent questions in Chemistry

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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 OTHAntony803 (270 points)

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1 answer 62 views

Based on our study of Monte Carlo simulations of phase transitions in computational chemistry, calculate the probability of a solid to liquid phase transition at a given temperature for a certain substance using Monte Carlo simulation techniques.

asked Jan 23 in Computational Chemistry by BrettRigby50 (190 points)

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Balance the following chemical equation: Fe2O3 + CO -> Fe + CO2

asked Jan 22 in Chemical reactions by JaimieBevan2 (490 points)

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1 answer 60 views

Balance the following chemical equation: Fe + O2 → Fe2O3

asked Jan 22 in Chemical reactions by DominikCarro (510 points)

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1 answer 59 views

Balance the following chemical equation: Fe + O2 -> Fe2O3

asked Jan 22 in Chemical reactions by LillaEllwood (350 points)

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1 answer 54 views

Balance the chemical equation for the reaction of sulfur dioxide (SO2) with oxygen (O2) to form sulfur trioxide (SO3).

asked Jan 22 in Chemical reactions by KarolynKidwe (350 points)

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1 answer 57 views

Balance the chemical equation for the reaction between potassium permanganate (KMnO4) and sodium sulfite (Na2SO3) in acidic solution.

asked Jan 22 in Chemical reactions by TammieMcgoug (290 points)

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1 answer 58 views

Balance the chemical equation for the combustion reaction of propane (C3H8) with oxygen gas to produce carbon dioxide gas and water vapor.

asked Jan 22 in Chemical reactions by LucienneOwf (250 points)

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1 answer 65 views

Balance the chemical equation for the combustion of propane (C3H8) in the presence of oxygen (O2) to produce carbon dioxide (CO2) and water (H2O).

asked Jan 22 in Chemical reactions by SilasU385802 (530 points)

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1 answer 60 views

At room temperature, the equilibrium constant (K) for the formation of a complex ion is 8.0 x 10^-5. If the temperature is increased by 10 degrees Celsius, how will the equilibrium constant be affected? Provide a numerical answer and explanation to support your reasoning.

asked Jan 22 in Chemical equilibrium by LloydChristy (710 points)

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1 answer 59 views

At a particular temperature and pressure, a mixture of water and ethanol has a vapor pressure of 45 torr. What is the mole fraction of ethanol in the mixture if its total pressure is 760 torr?

asked Jan 22 in Physical Chemistry by HoseaLafleur (550 points)

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1 answer 52 views

At 25°C, an electrochemical cell consists of a silver electrode in a 0.010 M AgNO3 solution and a platinum electrode in a 1.0 x 10^-3 M HCl solution. Calculate the resistance of the cell if the distance between the two electrodes is 2.0 cm and the area of each electrode is 5.0 cm^2.

asked Jan 22 in ElectroChemistry by LeonardoH36 (490 points)

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1 answer 64 views

Assuming you have the equilibrium constant value for a given chemical equation, determine the concentration of products and reactants at equilibrium for the reaction: N2(g) + 3H2(g) ⇌ 2NH3(g); Kc = 6.0 x 10^2 at 500°C. If the initial concentration of N2 is 0.1 M and the initial concentration of H2 is 0.2 M, what is the concentration of NH3 at equilibrium?

asked Jan 22 in Chemical equilibrium by AliciaB88894 (470 points)

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1 answer 9 views

Assuming you have a mixture of ethanol and water, design a distillation column that can achieve a 95% purity of ethanol in the distillate using the minimum number of plates possible. The feed to the column contains 40% ethanol and 60% water, and the distillate and bottoms products need to be at least 95% pure. The column operates at atmospheric pressure and the feed rate is 100 kg/hr. Also, determine the reflux ratio required to achieve this separation.

asked Jan 22 in Chemical engineering by MellisaW4709 (470 points)

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1 answer 58 views

Assuming the volume of a container at equilibrium is 2 L, what is the new equilibrium concentration of NOCl if the volume is changed to 1 L, given that the initial concentration of NOCl is 0.10 M and the equilibrium constant (Kc) is 0.054?

asked Jan 22 in Chemical equilibrium by MahaliaSchul (410 points)

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1 answer 59 views

Assuming that the volume of the system is constant, how will the equilibrium concentration of reactants and products be affected if the temperature is increased for the following reaction: 2 SO2(g) + O2(g) ⇌ 2 SO3(g) (a) Predict the direction of the reaction shift and explain why(b) Predict the effect of the temperature change on the equilibrium value of Kc for the reaction.

asked Jan 22 in Chemical equilibrium by ClariceScott (270 points)

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1 answer 43 views

Assuming that the student has knowledge about the harmonic oscillator model, the problem could be:Calculate the molecular vibrational frequencies and corresponding infrared spectra of a carbon monoxide (CO) molecule using the harmonic oscillator model. Given the following bond lengths and force constants:- Bond length of the CO bond in the ground state: 1.128 angstroms- Force constant of the CO bond in the ground state: 1880 N/m

asked Jan 22 in Quantum Chemistry by StantonBrand (230 points)

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1 answer 59 views

Assuming that the concentration of Cu2+ ions in a solution is 0.25 M, the concentration of Ag+ ions in another solution is 0.50 M, and the standard reduction potential of Cu2+(aq) + 2e- → Cu(s) is +0.34 V and that of Ag+(aq) + e- → Ag(s) is +0.80 V, calculate the current density when the two solutions are separated by a salt bridge and connected by a wire.

asked Jan 22 in ElectroChemistry by Juliet26542 (410 points)

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1 answer 49 views

Assuming that a 0.1 M solution of NH4Cl is at equilibrium with its own ions and NH3 in a closed vessel at 25°C. Calculate the effects on the equilibrium position when solid NH4Cl is added to the solution, and the final concentration of NH4+ and NH3 ions in the solution.

asked Jan 22 in Chemical equilibrium by JodyLeak286 (250 points)

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1 answer 48 views

Assuming standard conditions, calculate the standard enthalpy of combustion of methane (CH4), given that the standard enthalpies of formation of CH4 and H2O are -74.8 kJ/mol and -285.8 kJ/mol, respectively. The balanced chemical equation for the combustion of CH4 is:CH4(g) + 2O2(g) → CO2(g) + 2H2O(l) What is the standard enthalpy change (ΔH°) for this reaction?

asked Jan 22 in ThermoChemistry by LuellaJervoi (290 points)

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