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User ShanicePeele
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What is the mechanism behind the photochemical reaction that occurs when a simple alkene is exposed to ultraviolet radiation? Provide a detailed explanation of the step-by-step process involved in this reaction and the role of photochemical intermediates.
answered
Feb 22
in
PhotoChemistry
0
votes
74
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How does the magnitude of zeta potential affect the stability of a colloidal system and how can it be manipulated to control flocculation?
answered
Feb 20
in
Surface Chemistry
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votes
146
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What is the role of hydrogen bonds in maintaining the double helix structure of DNA? How many hydrogen bonds are formed between adenine and thymine base pairs compared to guanine and cytosine base pairs?
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Feb 13
in
BioChemistry
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148
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What is the role of histones in DNA packaging and how do they regulate gene expression?
answered
Feb 13
in
BioChemistry
0
votes
85
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What is the color of copper chloride (CuCl2) and what causes it to have that specific color?
answered
Feb 12
in
Inorganic Chemistry
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votes
132
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How can the synthesis of polyvinyl chloride from vinyl chloride monomer be optimized for maximum yield and minimal impurities? What factors can affect the reaction and how can they be controlled to achieve desired properties in the final product?
answered
Feb 11
in
Chemical synthesis
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89
views
How can the design of a biological treatment system for the removal of organic matter from industrial wastewater be optimized for maximum efficiency and cost-effectiveness?
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Feb 6
in
Chemical engineering
0
votes
90
views
How can computational chemistry and molecular modeling be used to predict the chemical and physical properties of a new drug molecule before it's synthesized, allowing researchers to make informed decisions about its potential effectiveness and safety?
answered
Feb 6
in
Physical Chemistry
0
votes
79
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How can students improve their preparation for chemistry-related careers, and what resources can they use to help them acquire the necessary skills and knowledge?
answered
Feb 5
in
Chemical education
0
votes
183
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Calculate the standard enthalpy change for the complete combustion of methane gas (CH4) at 25°C and 1 atm pressure, given that the standard enthalpy of formation for CH4 is -74.9 kJ/mol and the standard enthalpy of formation for water (H2O) is -285.8 kJ/mol.
answered
Feb 3
in
Chemical thermodynamics
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votes
26
views
Calculate the standard enthalpy change (∆H°) for the neutralization reaction of 50.0 mL of 0.100 M HCl with 75.0 mL of 0.0750 M NaOH at a constant pressure of 1 atm and a temperature of 25°C.
answered
Feb 3
in
Chemical thermodynamics
0
votes
115
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Calculate the standard electrode potential for the redox reaction: Fe3+(aq) + e- → Fe2+(aq) given that the standard reduction potential for the Fe3+(aq)/Fe2+(aq) couple is +0.77 V.
answered
Feb 3
in
Chemical thermodynamics
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votes
151
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How does adding a substituent to a molecule affect its excitation energy? Use quantum chemical calculations to compare the excitation energies of a set of closely related molecules, one with a substituent and one without, and determine the effect of the substituent on the molecules' excited states.
answered
Jan 30
in
Computational Chemistry
0
votes
74
views
How can liquid chromatography be used to accurately determine the concentration of a specific compound in a complex sample mixture?
answered
Jan 29
in
Analytical Chemistry
0
votes
91
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Calculate the enthalpy change for the ionization of hydrogen atom if the ionization energy required is 1312 kJ/mol.
answered
Jan 23
in
ThermoChemistry
0
votes
148
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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.
answered
Jan 22
in
ElectroChemistry
0
votes
43
views
What is a sampling distribution?
answered
Jan 17
in
Psychology
0
votes
67
views
What is the implicit association test?
answered
Jan 17
in
Psychology
0
votes
144
views
According to social learning theory, how does modelling influence human behaviour?
answered
Jan 16
in
Psychology
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votes
53
views
What are some limitations of using theoretical frameworks in qualitative research?
answered
Jan 16
in
Psychology
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