Recent activity by Bev611336790

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How does the presence of a catalyst affect the rate of a specific heterogeneous catalytic reaction, and how do the properties of the catalyst material influence its efficacy?

answered 3 days ago in Surface Chemistry

1 answer 22 views

What is the net number of ATP molecules produced per glucose molecule oxidized in the citric acid cycle and oxidative phosphorylation?

answered 3 days ago in BioChemistry

1 answer 27 views

What is the effect of different solvents with varying polarities on the rate of the photochemical reaction, and how does it correlate with the rate of energy transfer from the excited state of the photoactive molecule to the solvent molecules?

answered 5 days ago in PhotoChemistry

1 answer 28 views

What is the difference in the coordination chemistry of metallofullerenes and metalloclusters, and how does the electronic structure of their respective metal cores influence their reactivity and properties?

answered 6 days ago in Coordination Chemistry

1 answer 28 views

How does the concentration of reactants affect the rate of reaction and the selectivity of products in the conversion of methyl ethyl ketone to pyruvic acid using hydrogen peroxide as an oxidizing agent in the presence of sulphuric acid catalyst?

asked 6 days ago in Chemical kinetics

1 answer 28 views

How do the electronic and optical properties of quantum dots and quantum wells change as their size and shape vary?

answered Feb 14 in Quantum Chemistry

1 answer 35 views

What are the factors that affect the photobleaching efficiency of fluorescent dyes and how can this be optimized for live-cell imaging applications?

answered Feb 14 in PhotoChemistry

1 answer 35 views

What is the mechanism of action of insulin, and how does it regulate blood glucose levels in the body?

answered Feb 13 in BioChemistry

1 answer 36 views

How can incorporating environmental chemistry into the curriculum improve students' understanding of the impact of chemical reactions on the environment and promote sustainable practices in the field of chemistry?

answered Feb 6 in Chemical education

1 answer 32 views

How can insufficient emphasis on environmental chemistry in chemical education be addressed to promote awareness and understanding of the impact of chemical substances on the environment?

asked Feb 5 in Chemical education

1 answer 36 views

How can chemistry teachers effectively engage their students in the learning process and provide hands-on experimentation opportunities, given limited resources and funding for materials?

answered Feb 5 in Chemical education

1 answer 32 views

How can chemistry students effectively learn and understand laboratory techniques and concepts with limited access to laboratory equipment and facilities?

answered Feb 4 in Chemical education

1 answer 62 views

What are some effective ways for chemistry students to enhance their preparation for chemistry-related careers, and how can instructors better equip them for success in these fields?

asked Jan 30 in Chemical education

1 answer 80 views

What is the concentration of iron (Fe) in a water sample using cyclic voltammetry?

asked Jan 30 in Analytical Chemistry

1 answer 74 views

Using mass spectrometry, analyze and identify the unknown compound given to you by comparing its mass spectrum with the known compounds in the database. What is the molecular weight and functional group of the unknown compound?

asked Jan 30 in Analytical Chemistry

1 answer 60 views

Calculate the heat of combustion for propane gas, C3H8(g), if 12.5 grams of propane are completely burned in excess oxygen gas and the products of reaction are cooled from 700°C to 25°C. The heat capacities of the reactants and products are as follows: C3H8(g): cp = 44.10 J/K O2(g): cp = 29.38 J/K CO2(g): cp = 36.8 J/K H2O(g): cp = 33.6 J/K Assume that the heat capacities of the products and reactants are constant over the temperature range of the reaction and that the heat lost to the surroundings is negligible.

answered Jan 23 in ThermoChemistry

1 answer 62 views

A student wants to determine the power output of a galvanic cell containing a zinc electrode and a copper electrode. The zinc electrode has a surface area of 20 cm² and is coated with a layer of zinc which weighs 0.5 grams. The copper electrode has a surface area of 15 cm² and is coated with a layer of copper that weighs 0.4 grams. The cell operates at standard conditions (25°C and 1 atm), and the electrolyte is a solution of 1 M copper sulfate and 1 M zinc sulfate. Calculate the power output of the electrochemical cell.

answered Jan 22 in ElectroChemistry

1 answer 57 views

A chemical engineer wants to separate a mixture of ethanol and methanol using a distillation column. The feed to the column contains 30% ethanol and 70% methanol by mole. The engineer wants to obtain a distillate with 80% ethanol and a bottoms product containing no more than 1% ethanol. Determine the number of trays required in the distillation column to achieve this separation. Consider only equilibrium stages and assume that the feed is saturated liquid at its boiling point. The operating pressure of the column is 1 atm.

asked Jan 22 in Chemical engineering

1 answer 88 views

A beaker of water is placed on a hot plate, and the temperature is gradually increased. Write an equation for the rate of change of entropy with respect to time during this process, assuming the system is not in equilibrium. Use the equation to determine the rate of entropy production in the water as it is heated from 25°C to 100°C at a constant rate of 2°C/min.

answered Jan 22 in Physical Chemistry

1 answer 63 views

What is the product obtained when 3-methyl-1-phenylpropanal is heated with Tollen's reagent?

asked Jan 21 in Organic Chemistry

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