Hot questions

0 votes

1 answer 96 views

What is the major product formed when 1-methylcyclohexene is reacted with ethylene oxide in the presence of catalytic sulfuric acid?

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

0 votes

1 answer 49 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 ValeriaStrom (1.9k points)

0 votes

1 answer 62 views

A chemistry student needs to analyze a water sample to determine the concentration of a certain contaminant. The student knows the initial concentration of the contaminant in the source water and the volume of the source water used to produce the final sample. Can the student use mass balance calculations to determine the concentration of the contaminant in the final water sample? If so, what is the concentration of the contaminant in the final sample?

asked Jan 22 in Analytical Chemistry by StefanieBret (2.2k points)

0 votes

1 answer 63 views

A chemist wants to produce 5 grams of ammonia (NH3) gas through the reaction of nitrogen gas (N2) and hydrogen gas (H2). What mass of hydrogen gas is needed, assuming excess nitrogen gas is provided? (Hint: balance the chemical equation and use stoichiometry to calculate the required mass)

asked Jan 22 in Chemical reactions by KyleSchlemme (2.6k points)

0 votes

1 answer 54 views

A student is given a concentration of 0.1 M of CuSO4 and 0.2 M of AgNO3, and is asked to calculate the total resistance of an electrochemical cell with electrodes made of these two solutions separated by a salt bridge. The standard reduction potentials for Cu and Ag are +0.34 V and +0.80 V, respectively. Calculate the total resistance of the cell at 25°C assuming that the cell has a thickness of 1 cm and a cross-sectional area of 10 cm².

asked Jan 22 in ElectroChemistry by AleidaSeifer (2.6k points)

0 votes

1 answer 68 views

How does the specific surface area of a solid catalyst affect the rate of reaction for the decomposition of hydrogen peroxide?

asked Jan 22 in Surface Chemistry by ErnestinaMus (2.1k points)

0 votes

1 answer 53 views

A student needs to determine the change in enthalpy (ΔH) for the reaction between methane (CH4) and oxygen (O2) to form carbon dioxide (CO2) and water (H2O) at a temperature of 25°C and a pressure of 1 atm. The initial concentrations of CH4 and O2 are both 0.1 M, and the final concentrations of CO2 and H2O are both 0.05 M. What is the change in enthalpy for this reaction at the given conditions?

asked Jan 22 in Physical Chemistry by MartyKindler (2.5k points)

0 votes

1 answer 57 views

A chemistry student wants to determine the specific heat capacity of an unknown metal. The student performs a calorimetry experiment and records the following data: - 50 mL of water at 25°C was added to a calorimeter. - The initial temperature of the metal was 100°C. - The final temperature of the metal and water mixture was 30°C. - The mass of the metal was 100 grams.What is the specific heat capacity of the metal?

asked Jan 22 in ThermoChemistry by ScottyWild8 (2.3k points)

0 votes

1 answer 50 views

A student wanted to determine the Faraday constant using the electrolysis of silver nitrate solution. If a current of 2.5 amperes flowed through the solution for 2 hours and 30 minutes, and 0.508 grams of silver were deposited on the cathode, what is the value of the Faraday constant?

asked Jan 22 in ElectroChemistry by EdwardCecili (3.0k points)

0 votes

1 answer 53 views

A student needs to calculate the standard potential of a electrochemical cell formed by a zinc electrode and a silver electrode. The concentration of Zn2+ ions in the zinc half-cell is 1.0 M and the concentration of Ag+ ions in the silver half-cell is 0.1 M. The measured potential of the cell is 1.95 V. What is the standard potential of the cell?

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

0 votes

1 answer 99 views

What is the IUPAC name of the following organic compound: CH3CH2COOH

asked Jan 21 in Organic Chemistry by RosettaMcinn (2.7k points)

0 votes

1 answer 96 views

Identify the functional group and write the reaction mechanism for the following reaction: ethanoic acid reacts with sodium hydroxide to form sodium ethanoate and water.

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

0 votes

1 answer 93 views

Balance the following chemical equation for the inorganic compound calcium hydroxide reacting with hydrochloric acid: Ca(OH)2 + HCl -> CaCl2 + H2O

asked Jan 21 in Inorganic Chemistry by Regina84W280 (2.3k points)

0 votes

1 answer 67 views

A certain metal oxide has an enthalpy of formation of -589.3 kJ/mol. When a 5.60 g sample of this oxide is reduced with excess hydrogen gas, the enthalpy change for the reaction is found to be -129.3 kJ/mol. Calculate the enthalpy of reduction per mole of this oxide.

asked Jan 22 in ThermoChemistry by 540252730007 (2.6k points)

0 votes

1 answer 92 views

What is the solubility of copper(II) sulfate pentahydrate in water at 25°C?

asked Jan 21 in Inorganic Chemistry by LidiaBautist (2.5k points)

0 votes

1 answer 56 views

A chemistry student wants to study the adsorption behavior of a gas on a solid surface. The Langmuir adsorption isotherm experiment is conducted at temperature T. After analyzing the data, the student finds that the maximum adsorption capacity (at saturation) is q moles of the gas per unit area of the solid surface. The student also determines the value of the Langmuir constant K, which is proportional to the affinity of the gas for the surface. Now, the student needs to determine the fraction of the surface that is covered by the gas molecules at a certain pressure P below the saturation

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

0 votes

1 answer 53 views

A student is studying a chemical reaction that goes to completion in a beaker placed on a heated surface at a constant temperature. After the reaction has come to completion, the student removes the beaker from the heated surface and allows it to cool. Using the principles of non-equilibrium thermodynamics and irreversible processes, how can the student calculate the amount of heat that was transferred during the process? Specifically, what factors must be taken into account in order to accurately calculate the heat transfer?

asked Jan 22 in Physical Chemistry by PhillipPugli (2.5k points)

0 votes

1 answer 92 views

What is the solubility of calcium carbonate in water at 25°C?

asked Jan 21 in Inorganic Chemistry by EdithLindt35 (2.1k points)

0 votes

1 answer 67 views

How would adding more reactants to a reaction at equilibrium affect the direction of the reaction and the equilibrium position, and what would be the quantitative effect on the equilibrium constant?

asked Jan 22 in Chemical equilibrium by BrandieB8434 (2.1k points)

0 votes

1 answer 94 views

What is the pH of a 0.1 M solution of acetic acid (CH3COOH) at 25°C, given that the Ka of acetic acid is 1.8 x 10^-5?

asked Jan 21 in Organic Chemistry by VanBohannon (2.5k points)

Categories