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74
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How does the size and shape of microplastics affect their toxicity and accumulation in marine organisms?
answered
Feb 24
in
Environmental Chemistry
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votes
79
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How does changing the pH of the solution affect the equilibrium position of the redox reaction between Fe3+ and I- ions? Provide a detailed explanation of the relationship between pH and equilibrium constant for this reaction.
answered
Feb 24
in
Chemical equilibrium
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votes
84
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What is the preferred method for synthesis of symmetrical ethers using alcohols and acids, and what are some limitations and drawbacks of this method?
answered
Feb 22
in
Organic Chemistry
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73
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How does the prediction of electronic and magnetic properties of topological materials using quantum chemistry aid in the design and development of advanced electronic devices with improved performance and efficiency?
answered
Feb 22
in
Quantum Chemistry
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79
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What is the mechanism of the hydrogenation of ethyne to ethane using a palladium catalyst?
answered
Feb 20
in
Organic Chemistry
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71
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What is the critical micelle concentration of sodium dodecyl sulfate (SDS) in water at 25°C and how does it change with temperature?
answered
Feb 19
in
Surface Chemistry
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78
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What is the equilibrium constant for the reaction between nitrogen gas and hydrogen gas to form ammonia gas at 500°C given that the equilibrium concentrations are [N2] = 0.25 M, [H2] = 0.20 M and [NH3] = 0.10 M?
answered
Feb 17
in
Chemical equilibrium
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94
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How can the chemical structure of existing cardiovascular drugs be modified to improve their efficacy and reduce their side effects?
answered
Feb 6
in
Medicinal Chemistry
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138
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Calculate the standard Gibbs free energy change for the following chemical reaction at 25°C:2H2(g) + O2(g) → 2H2O(l)The standard Gibbs free energy of formation at 25°C for H2O(l) is -237.2 kJ/mol, H2(g) is 0 kJ/mol, and O2(g) is 0 kJ/mol.
answered
Feb 3
in
Chemical thermodynamics
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155
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What is the effect of changing the concentration of reactants on the reaction rate and yield of a chemical reaction?
answered
Feb 3
in
Chemical kinetics
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129
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What are the specific chemical reactions that occur in the bioluminescence of marine organisms, and how do the chemical structures of the light-emitting molecules contribute to their photochemical properties?
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Jan 31
in
PhotoChemistry
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86
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Calculate the enthalpy change (in kJ/mol) for the polymerization of ethylene to polyethylene, given that the polymerization of 1 mole of ethylene produces 3 moles of polyethylene and the enthalpy change of the reaction is -32 kJ/mol.
answered
Jan 23
in
ThermoChemistry
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87
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Calculate the change in enthalpy for the following chemical reaction: CH4(g) + 2O2(g) -> CO2(g) + 2H2O(l) Given that the enthalpies of formation for CH4(g), CO2(g), and H2O(l) are -74.8 kJ/mol, -393.5 kJ/mol, and -285.8 kJ/mol respectively.
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Jan 23
in
Chemical reactions
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165
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A student wants to know the equilibrium concentration of hydrogen gas and nitrogen gas at a particular temperature and pressure when they are mixed in a container in a 2:1 ratio. The student also wants to calculate the equilibrium constant of the reaction when nitrogen and hydrogen form ammonia. Can you help the student by designing a step-by-step procedure to find the equilibrium concentrations and equilibrium constant at the given conditions?
answered
Jan 22
in
Physical Chemistry
0
votes
136
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What is the IUPAC name of the following organic compound: CH3CH2CH2CH2COOH?
answered
Jan 21
in
Organic Chemistry
0
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106
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What is the name of the theory that suggests that our behaviour is shaped by the environment?
answered
Jan 20
in
Psychology
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117
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Why is reliability important in psychometrics?
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Jan 20
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Psychology
0
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141
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What is the role of attention in language processing?
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Jan 17
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Psychology
0
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140
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How might attachment theory inform end-of-life care?
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Jan 17
in
Psychology
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164
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What is the difference between inter-rater reliability and intra-rater reliability?
answered
Jan 16
in
Psychology
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