Hot questions

0 votes

1 answer 97 views

What is the oxidation state of the central metal ion in the compound Fe(CO)₅?

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

0 votes

1 answer 69 views

A chemical engineer needs to design a distillation column for the separation of a mixture containing ethanol (boiling point of 78.4°C) and water. The desired composition of the distillate is a minimum of 90% ethanol. What is the minimum number of theoretical trays needed in the column to achieve this composition, given that the feed contains 40% ethanol and the reflux ratio is 1.5?

asked Jan 22 in Chemical engineering by AHIKayleigh (2.2k points)

0 votes

1 answer 52 views

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

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

0 votes

1 answer 99 views

What is the pKa of the primary amine ethylamime if its pH in solution is 9.0?

asked Jan 21 in Organic Chemistry by VeroniqueBig (2.3k points)

0 votes

1 answer 71 views

A certain hydrocarbon requires 343 kJ of energy to break one mole of carbon-carbon bonds and 413 kJ/mole to break one mole of carbon-hydrogen bonds. What is the bond dissociation energy of the carbon-carbon and carbon-hydrogen bonds in this hydrocarbon?

asked Jan 22 in ThermoChemistry by Mose2866156 (2.4k points)

0 votes

1 answer 71 views

A brass alloy electrode with an area of 5 cm² is immersed in a 0.5 M NaCl solution at 25°C. Given that the standard potential of the electrode is -0.35 V versus a standard hydrogen electrode, calculate the corrosion current density of the electrode in the given environment using Tafel extrapolation.

asked Jan 22 in ElectroChemistry by DarbyKieran3 (2.4k points)

0 votes

1 answer 71 views

A 15.0 g sample of a mixture containing sodium chloride and sodium nitrate is dissolved in water, and then silver nitrate is added until no more precipitation occurs. The mass of the precipitate is found to be 20.4 g. What is the mass percentage of each component in the mixture?

asked Jan 22 in Analytical Chemistry by ArronXev3244 (2.3k points)

0 votes

1 answer 61 views

A chemistry student needs to find the rate of a chemical reaction for a given set of concentrations and time, given the following reaction: 2H2 (g) + O2 (g) -> 2H2O (g)If the initial concentrations of H2 and O2 are 0.5 M and 0.2 M, and the reaction rate is 0.12 M/s, what is the concentration of H2O after 10 seconds?

asked Jan 22 in Chemical reactions by MerryGoodsel (1.7k points)

+1 vote

1 answer 56 views

What is the oxidation state of nitrogen in the compound potassium nitrate (KNO3)?

asked Jan 21 in Inorganic Chemistry by JaneW5862561 (2.3k points)

0 votes

1 answer 59 views

A gas is contained in a cylinder at a pressure of 1 atm and a temperature of 25°C. The cylinder is fitted with a piston that can be moved to change the volume. The gas is allowed to expand irreversibly to a final pressure of 0.5 atm, and the temperature is kept constant. Calculate the work done by the system, and determine if the process is endothermic or exothermic.

asked Jan 22 in Physical Chemistry by NinaDimattia (2.4k points)

0 votes

1 answer 58 views

A sample of an unknown inorganic compound contains 44.44% magnesium, 22.22% sulfur, and 33.33% oxygen by mass. Determine the empirical formula of the compound. If the molar mass of the compound is 120 g/mol, what is its molecular formula?

asked Jan 22 in Inorganic Chemistry by CherylDooley (2.5k points)

0 votes

1 answer 71 views

What is the pH of 0.1 M solution of HCl knowing that its dissociation constant is 1.3 x 10^-4?

asked Jan 22 in Inorganic Chemistry by IsabellFrome (2.3k points)

0 votes

1 answer 59 views

A copper wire is exposed to a solution containing 0.2 M NaCl. The corrosion rate of the wire is found to be 5.8 microAmp/cm². Calculate the corrosion current density of the copper wire in the given environment.

asked Jan 22 in ElectroChemistry by VickeyBatema (2.2k points)

0 votes

1 answer 56 views

A student needs to calculate the current density (in A/m^2) in an electrochemical cell with a cross-sectional area of 0.01 m^2 and a current of 0.5 A passing through it. The half-cell reactions are as follows:Anode: Zn(s) -> Zn2+(aq) + 2e^-Cathode: Cu2+(aq) + 2e^- -> Cu(s)The concentrations of Zn2+ and Cu2+ ions in the solutions are 0.1 M and 0.01 M, respectively. The temperature of the cell is 298 K. Calculate the current density.

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

0 votes

1 answer 102 views

What is the systematic name of the organic compound with the molecular formula C6H12 and the following structural formula: CH3CH2CH2CH2CH=CH2

asked Jan 21 in Organic Chemistry by Mose2866156 (2.4k points)

0 votes

1 answer 68 views

A 0.50 L vessel contains 1.0 mol of N2(g) and 3.0 mol of H2(g) at equilibrium at 400 K according to the following equation:N2(g) + 3H2(g) ⇌ 2NH3(g)If the volume of the vessel is suddenly decreased to 0.25 L, what will happen to the equilibrium position? Will the concentration of NH3 increase or decrease? Calculate the new equilibrium constant at this new volume.

asked Jan 22 in Chemical equilibrium by Milagros70T7 (2.7k points)

0 votes

1 answer 63 views

A chemistry student needs to determine the rate law for the reaction between hydrogen peroxide and iodide ion in the presence of an acid catalyst. Using experimental data, what is the order of the reaction with respect to hydrogen peroxide, iodide ion, and acid? Write the rate law equation for this reaction.

asked Jan 22 in Chemical kinetics by AugustusQsj (2.5k points)

0 votes

1 answer 112 views

What is the IUPAC name for the organic compound with the molecular formula C6H12O2?

asked Jan 21 in Organic Chemistry by ConnieSmothe (2.1k points)

0 votes

1 answer 68 views

How does the coordination chemistry of metalloenzymes and metalloproteins contribute to their functionality in biological processes?

asked Jan 22 in Coordination Chemistry by LeannaCremea (1.8k points)

0 votes

1 answer 51 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 AddieFrayne (2.0k points)

Categories