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1
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30
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How does the size and chemical composition of microplastics affect their potential toxicity to marine organisms?
asked
Feb 24
in
Environmental Chemistry
0
votes
1
answer
38
views
What are the most commonly used pesticides in food production and what are their potential negative effects on human health due to pesticide residue buildup in the food chain?
asked
Feb 21
in
Environmental Chemistry
0
votes
1
answer
39
views
How does the intensity of light affect the rate of photochemical reactions in a specific organic compound?
asked
Feb 20
in
PhotoChemistry
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votes
1
answer
54
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What is the effect of different cations and anions on the viscosity of ionic liquids at varying temperatures?
asked
Feb 19
in
Physical Chemistry
0
votes
1
answer
20
views
How does the coordination of metal ions within metalloenzymes influence their catalytic activity and specificity towards substrates?
asked
Feb 19
in
Coordination Chemistry
0
votes
1
answer
27
views
How does the coordination chemistry of metalloproteins and metalloenzymes affect their biological function and activity?
asked
Feb 19
in
Coordination Chemistry
0
votes
1
answer
44
views
How does the concentration of greenhouse gases in Earth's atmosphere affect the global temperature? Provide specific examples of greenhouse gases and their contribution to global warming.
asked
Feb 19
in
Environmental Chemistry
0
votes
1
answer
38
views
What is the chemical reaction responsible for the formation of acid rain and how does it affect soil pH and plant growth in affected areas?
asked
Feb 18
in
Environmental Chemistry
0
votes
1
answer
119
views
What is the effect of doping on the electrical conductivity of semiconductor materials used in electronic devices?
asked
Feb 12
in
Materials Chemistry
0
votes
1
answer
36
views
How can the synthesis and characterization of new materials improve the efficiency and durability of fuel cells?
asked
Feb 11
in
Materials Chemistry
0
votes
1
answer
76
views
Calculate the standard free energy change for the following redox reaction under standard conditions:2 Fe3+ (aq) + H2 (g) → 2 Fe2+ (aq) + 2 H+ (aq)Given: Standard reduction potential of Fe3+ / Fe2+ = -0.771 V Standard reduction potential of H+ / H2 = 0.00 V
asked
Feb 3
in
Chemical thermodynamics
0
votes
1
answer
75
views
Calculate the standard enthalpy change ($\Delta H^\circ$) for the dissolution of 10.0 g of sodium hydroxide (NaOH) in 100.0 mL of water assuming that the specific heat capacity of the solution is 4.18 J g$^{-1}$ K$^{-1}$ and that the initial and final temperatures are 25.0$^\circ$C and 35.0$^\circ$C, respectively. The molar mass of NaOH is 40.0 g mol$^{-1}$.
asked
Feb 3
in
Chemical thermodynamics
0
votes
1
answer
69
views
How does changing the pH affect the formation of the complex ion Cu(NH3)4 2+, when copper(II) sulfate and excess ammonia are mixed together? How can the equilibrium constant (Kc) be calculated for this reaction at different pH values?
asked
Feb 3
in
Chemical equilibrium
0
votes
1
answer
106
views
How do different types of air pollutants, such as particulate matter and ozone, affect respiratory health in humans? Specifically, how can the size and composition of these pollutants influence their impact on the respiratory system, and what are the potential long-term health effects from prolonged exposure to high levels of these pollutants?
asked
Jan 31
in
Environmental Chemistry
0
votes
1
answer
103
views
What is the composition of the volatile components in a mixture of gasoline using gas chromatography?
asked
Jan 30
in
Analytical Chemistry
0
votes
1
answer
103
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How can X-ray fluorescence spectroscopy be utilized to identify the presence of toxic heavy metals, such as lead and cadmium, in a given sample of soil?
asked
Jan 30
in
Analytical Chemistry
0
votes
1
answer
73
views
Calculate the enthalpy of desorption for water vapor adsorbed on activated carbon, given that the heat of adsorption is -50 kJ/mol and the boiling point of water is 100°C.
asked
Jan 23
in
ThermoChemistry
0
votes
1
answer
108
views
A 25 g sample of water at 25°C is heated by 200 J. The temperature of the water increases to 40°C. Calculate the specific heat capacity of water.
asked
Jan 22
in
Chemical thermodynamics
0
votes
1
answer
86
views
What is parsimony in relation to theories?
asked
Jan 20
in
Psychology
0
votes
1
answer
64
views
Please compare reliability versus validity.
asked
Jan 20
in
Psychology
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