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User MargueriteSl
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1
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24
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What are the products of the reaction between sodium hydroxide and sulfuric acid? Write the balanced chemical equation and identify the spectator ions.
asked
3 days
ago
in
Inorganic Chemistry
0
votes
1
answer
19
views
What is the equilibrium constant for the reaction between hydrogen peroxide and iodide ions in acidic solution?
asked
3 days
ago
in
Chemical equilibrium
0
votes
1
answer
3
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How does the quantity and type of protein affect the adsorption behavior on a solid surface?
asked
3 days
ago
in
Surface Chemistry
0
votes
1
answer
28
views
What is the maximum surface coverage of nitrogen gas on a platinum surface at 25°C and a pressure of 1 atm, according to the Langmuir adsorption isotherm data with a Langmuir constant of 0.25 L/mole?
asked
5 days
ago
in
Surface Chemistry
0
votes
1
answer
15
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How does the coordination of metal ions in metalloproteins affect their enzymatic activity? Provide specific examples and discuss the implications for drug design targeting metalloproteins.
asked
6 days
ago
in
Coordination Chemistry
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votes
1
answer
22
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What is the best catalyst and reaction conditions for the synthesis of polyvinylpyrrolidone from vinylpyrrolidone monomer, in terms of high yield and low impurities?
asked
Feb 17
in
Chemical synthesis
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votes
1
answer
30
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What is the balanced chemical equation for the synthesis of magnesium oxide?
asked
Feb 17
in
Chemical reactions
0
votes
1
answer
18
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How do the properties of surfactants change with variations in the hydrophilic and lipophilic chain lengths in their molecular structure?
asked
Feb 17
in
Surface Chemistry
0
votes
1
answer
24
views
How does the surface chemistry affect the intensity of SERS peak in the detection of chemical substances?
asked
Feb 17
in
Surface Chemistry
0
votes
1
answer
29
views
What is the crystal structure of sodium chloride (NaCl) and how does it form?
asked
Feb 14
in
Physical Chemistry
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votes
1
answer
27
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How does pre-mRNA splicing impact the final structure and function of proteins, and what is the role of small nuclear ribonucleoproteins (snRNPs) in this process?
asked
Feb 14
in
BioChemistry
0
votes
1
answer
40
views
What is the effect of changing the magnetic field strength on the chemical shifts observed in a nuclear magnetic resonance (NMR) spectrum? Provide an example of a molecule and its corresponding NMR spectrum to illustrate your answer.
asked
Feb 13
in
Physical Chemistry
0
votes
1
answer
33
views
How can the efficiency of polymer-based photovoltaic materials be improved through chemical modifications to the polymer structure?
asked
Feb 7
in
Polymer Chemistry
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votes
1
answer
44
views
How can inadequate training for chemistry teachers be improved to better equip them with the knowledge and skills necessary to effectively teach and engage students in the subject of chemistry?
asked
Feb 5
in
Chemical education
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votes
1
answer
56
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Design a Chemical Reactor for the Hydrogenation of Benzene to Cyclohexane:Given the reaction between benzene and hydrogen gas to produce cyclohexane (C6H6 + 3H2 -> C6H12), design a chemical reactor that can convert 900 kg/hr of benzene to cyclohexane, assuming a 90% conversion is desired. The reactor should operate at 300°C and 20 atm, and the hydrogen flow rate is limited to 3000 kg/hr. Determine the reactor type, size, and necessary parameters such as heat transfer, pressure drop, and residence time.
asked
Feb 3
in
Chemical engineering
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votes
1
answer
10
views
Consider the chemical reaction between sodium hydroxide (NaOH) and hydrochloric acid (HCl) to produce sodium chloride (NaCl) and water (H2O). Write a balanced chemical equation for this reaction and determine the mole ratio of NaOH and HCl required for complete reaction. If we start with 10 grams of NaOH and 20 grams of HCl, determine which is the limiting reagent, the amount of excess reagent left over, and the mass of NaCl and H2O produced.
asked
Feb 3
in
Inorganic Chemistry
0
votes
1
answer
73
views
What is the chemical composition of acid rain, and how does it affect the pH level of soil and water bodies in areas prone to acid rain?
asked
Jan 30
in
Environmental Chemistry
0
votes
1
answer
57
views
What is the concentration of a solution of iron(II) sulfate if its absorbance at a wavelength of 495 nm is 0.456 in a 1 cm cuvette with a path length of 1 cm? The molar absorptivity of iron(II) sulfate at 495 nm is 8100 L/mol·cm. The molecular weight of iron(II) sulfate is 151.91 g/mol.
asked
Jan 30
in
Analytical Chemistry
0
votes
1
answer
51
views
Calculate the corrosion rate of a copper metal when it is placed in a galvanic couple with zinc metal. The potential difference between the two metals is measured to be 1.5 V and the surface area of the copper metal is 2 cm². The density of copper is 8.96 g/cm³ and its atomic weight is 63.546 g/mol. The atomic weight of zinc is 65.38 g/mol and its density is 7.14 g/cm³. At constant temperature and pressure, assume that the Faraday constant is 96,485 Coulombs/mol and that one mole of electrons is equivalent to one Faraday.
asked
Jan 23
in
ElectroChemistry
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votes
1
answer
45
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A student wants to determine the polarization in an electrochemical cell where the anode is made of zinc and the cathode is made of copper. The electrolyte used is CuSO4. The current through the cell is 0.5 A and the measured potential difference is 1.5 V. What is the polarization of this electrochemical cell?
asked
Jan 22
in
ElectroChemistry
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