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0
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What is the step-by-step procedure for the preparation of 2,4-dinitrobenzoic acid from benzoic acid and nitric acid? Additionally, how can the purity of the final product be determined using techniques such as melting point determination and TLC analysis?
answered
3 days
ago
in
Chemical synthesis
0
votes
24
views
How do the photochemical properties of supramolecular assemblies vary with the change in the size and geometry of the assembly components? Provide a detailed analysis based on experimental evidence.
answered
3 days
ago
in
PhotoChemistry
0
votes
31
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Identify the type of inorganic compound formed by the combination of sodium and chlorine atoms. Is the resulting compound ionic, covalent, or metallic? Justify your answer with appropriate reasoning.
answered
5 days
ago
in
Inorganic Chemistry
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votes
27
views
How does the degree of entanglement affect the behavior and properties of molecular and nanoscale systems?
answered
6 days
ago
in
Quantum Chemistry
0
votes
37
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What is the chemical composition and source of microplastics found in the stomach contents of marine organisms in a specific coastal region, and how does this pollution affect the organism's digestive system, metabolism, and overall health?
answered
Feb 18
in
Environmental Chemistry
0
votes
23
views
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
0
votes
24
views
How does the surface modification of nanoparticles affect their reactivity and physical properties?
answered
Feb 17
in
Surface Chemistry
0
votes
40
views
How can we increase diversity in the chemistry field to ensure that more underrepresented groups have equal access to opportunities and resources, and promote a more inclusive and equitable environment within the chemistry community?
answered
Feb 13
in
Chemical education
0
votes
30
views
What are the effects of chirality on the photochemical properties of molecules and what are some examples of chiral molecules known to exhibit different photochemical behaviors?
answered
Feb 12
in
PhotoChemistry
0
votes
27
views
How can the excess nitrogen and phosphorus pollution in a water body be assessed and controlled to improve the water quality for human and aquatic life?
answered
Feb 7
in
Environmental Chemistry
0
votes
34
views
How can nanoparticles be used in the remediation of soil contaminated with heavy metals and organic pollutants, and what are the potential risks associated with their use?
answered
Feb 5
in
Environmental Chemistry
0
votes
60
views
How can the composition and crystalline structure of a mineral sample be determined using X-ray diffraction analysis?
answered
Jan 29
in
Analytical Chemistry
0
votes
69
views
Calculate the enthalpy change for the combustion of methane gas (CH4) if 37.0 g of CH4 is completely burned in a bomb calorimeter and the temperature increases by 285.4 K. Assume that the calorimeter has a heat capacity of 4.40 kJ/K and that the combustion reaction is as follows: CH4(g) + 2O2(g) -> CO2(g) + 2H2O(l); ΔH=-890.4 kJ/mol. What is the enthalpy change for the combustion of one mole of methane gas?
answered
Jan 23
in
Chemical reactions
0
votes
11
views
A student is designing an electrochemical cell using zinc and copper electrodes. The student wants to know the current density (in A/cm²) when the cell operates at a voltage of 1.5 V and a temperature of 25°C. The area of the zinc electrode is 10 cm², and the area of the copper electrode is 5 cm². Assuming a 2:1 ratio for the transfer of electrons between the two electrodes, calculate the current density in the cell.
answered
Jan 22
in
ElectroChemistry
0
votes
73
views
A chemistry student wants to create a buffer solution with a pH of 7.2 using acetic acid and sodium acetate. The student has calculated that they need 0.1 moles of each component to make a 250 mL buffer solution. However, the student accidentally added 0.02 moles of hydrochloric acid to the buffer solution. Calculate the new pH of the buffer solution and explain if the addition of the hydrochloric acid has shifted the equilibrium position of the reaction towards the acid or the base.
answered
Jan 22
in
Chemical equilibrium
0
votes
43
views
How did George Miller's research contribute to our understanding of short-term memory?
answered
Jan 20
in
Psychology
0
votes
82
views
How can normative influence be used for social change?
answered
Jan 17
in
Psychology
0
votes
28
views
How can discursive psychology be applied in practical settings?
answered
Jan 16
in
Psychology
0
votes
16
views
Why is it important for researchers to acknowledge cultural biases in their research?
answered
Jan 16
in
Psychology
0
votes
45
views
What is the difference between syntax and semantics?
answered
Jan 14
in
Psychology
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