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22
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What is the effect of varying the cross-linking density on the swelling behavior of a superabsorbent polymer?
answered
Feb 20
in
Polymer Chemistry
0
votes
35
views
How does the concentration of sulfur dioxide emissions from a nearby coal-fired power plant affect the rate and severity of acid deposition in a local forest ecosystem?
answered
Feb 19
in
Environmental Chemistry
0
votes
35
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What is the effect of the chemical structure and composition of photovoltaic materials on their ability to convert light energy to electrical energy?
answered
Feb 18
in
PhotoChemistry
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24
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What is the balanced chemical equation for the combustion of propane (C3H8)?
answered
Feb 17
in
Chemical reactions
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votes
35
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What is the enthalpy change for the combustion reaction of methane gas (CH4) when 2.50 moles of methane are burned in excess oxygen gas under standard conditions?
answered
Feb 17
in
ThermoChemistry
0
votes
40
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What is the balanced chemical equation for the combustion of methane gas (CH4) with oxygen (O2) to produce carbon dioxide (CO2) and water (H2O)?
answered
Feb 17
in
Chemical reactions
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94
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What is the mechanism of ligand substitution reactions in coordination chemistry and how does the substitution of a ligand affect the properties of a coordination complex? Provide examples to support your answer.
answered
Feb 13
in
Coordination Chemistry
0
votes
100
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How can the synthesis of biodegradable polymers be optimized to enhance their degradation rate while maintaining their mechanical properties?
answered
Feb 11
in
Polymer Chemistry
0
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44
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How can the coordination compound [Co(NH3)6]Cl3 be synthesized and characterized in the laboratory?
answered
Feb 6
in
Coordination Chemistry
0
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40
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How can chemistry students be exposed to current research in chemistry despite the limited resources and opportunities available at their institution?
answered
Feb 4
in
Chemical education
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5.9k
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Consider the metalloprotein hemoglobin, which has four heme groups each coordinated to a single iron ion. Suppose that ferrous iron in the heme group of hemoglobin is oxidized to ferric state by reacting with hydrogen peroxide. Calculate the number of hydrogen peroxide molecules needed to oxidize all the iron ions of hemoglobin in a human body that has a total of 5 liters of blood, assuming the concentration of hemoglobin in blood is 15 grams per liter.
answered
Feb 3
in
Coordination Chemistry
0
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58
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Calculate the standard enthalpy change for the melting of 10 grams of ice at -10°C to liquid water at 20°C, given the specific heat capacity of water is 4.18 J/g°C and the enthalpy of fusion of water is 6.01 kJ/mol.
answered
Feb 3
in
Chemical thermodynamics
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69
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How does changing the concentration of the reactants affect the rate of the chemical reaction and ultimately the profitability of the reaction?
answered
Feb 3
in
Chemical kinetics
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111
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How does the change in reaction conditions, such as temperature and pH, affect the rates of electron transfer processes and redox reactions in solution?
answered
Jan 31
in
Quantum Chemistry
0
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63
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How can we use voltammetry to accurately quantify the amount of copper (II) ions present in a sample of drinking water?
answered
Jan 30
in
Analytical Chemistry
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59
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Calculate the equilibrium concentrations of reactants and products for the following reaction at a temperature of 25°C and a pressure of 1 atm:2 NO(g) + Br2(g) ⇌ 2 NOBr(g)Given the initial concentrations are [NO] = 0.20 M, [Br2] = 0.35 M, and [NOBr] = 0.015 M. The equilibrium constant (Kc) for the reaction is 4.8 x 10^2 at 25°C.
answered
Jan 23
in
Chemical equilibrium
0
votes
93
views
What is the focus of the cognitive-behavioural model?
answered
Jan 20
in
Psychology
0
votes
38
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Who benefits from a community psychology approach?
answered
Jan 20
in
Psychology
0
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63
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Why did Maslow propose the concept of self-actualisation?
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Jan 20
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Psychology
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48
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According to Piaget, what is the main cognitive process that drives intellectual development?
answered
Jan 17
in
Psychology
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