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1
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What is the rate of reaction between sodium hydroxide and hydrochloric acid, and how does it change with varying concentrations of the two reactants?
asked
Feb 22
in
Inorganic Chemistry
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votes
1
answer
41
views
What is the mechanism involved in the long-range transportation of POPs and their subsequent deposition in remote locations, and how does this contribute to the persistence of POPs in the environment?
asked
Feb 20
in
Environmental Chemistry
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votes
1
answer
35
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How does the concentration of reactants and products affect the equilibrium constant and reaction rate of a chemical reaction? Provide experimental evidence to support your answer.
asked
Feb 19
in
Chemical kinetics
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1
answer
34
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What is the relationship between the arrangement of atoms in a crystal lattice and its physical properties, such as melting point and hardness? Provide a detailed explanation using examples from different crystal structures.
asked
Feb 17
in
Physical Chemistry
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votes
1
answer
27
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How does the addition of a photosensitizer affect the mechanism of a photochemical reaction in organic compounds?
asked
Feb 17
in
PhotoChemistry
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1
answer
40
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Identify the type of inorganic solid that is formed between sulfur and oxygen in the compound SO2.
asked
Feb 14
in
Inorganic Chemistry
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1
answer
67
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How do chlorofluorocarbons (CFCs) deplete the ozone layer and what chemical reactions are involved in this process?
asked
Feb 12
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Environmental Chemistry
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1
answer
41
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How can the presence of heavy metal contaminants in soil affect the growth and quality of crops, and what techniques can be used to remediate the contaminated soil in order to minimize their negative impact on agriculture?
asked
Feb 10
in
Environmental Chemistry
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votes
1
answer
70
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Calculate the standard enthalpy change for the following reaction at 298 K: 2NaHCO3(s) + MgCl2(aq) → MgCO3(s) + 2NaCl(aq) + H2O(l)Given the following standard enthalpies of formation: ΔHf°(NaHCO3) = -950.7 kJ/molΔHf°(MgCl2) = -641.8 kJ/molΔHf°(MgCO3) = -1128.2 kJ/molΔHf°(NaCl) = -411.2 kJ/molΔHf°(H2O) = -285.8 kJ/mol
asked
Feb 3
in
Chemical thermodynamics
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1
answer
74
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Calculate the corrosion rate of a 5mm thick copper wire that is exposed to a saline solution of 20% NaCl at a temperature of 25°C, knowing that the wire has lost 3 grams of mass in 10 days of exposure.
asked
Jan 23
in
ElectroChemistry
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37
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A student wants to electroplate a nickel wire with copper. The student has 1 g of copper sulfate and a 2 M solution of sulfuric acid. The wire has a surface area of 3 cm², and the desired copper thickness on the wire is 0.025 cm. How long should the student electroplate the wire with a current of 1.5 A to achieve the desired thickness of copper? Calculate the current density in the electrochemical cell.
asked
Jan 22
in
ElectroChemistry
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1
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160
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How many different structural isomers are possible for the molecular formula C4H10O?
asked
Jan 21
in
Organic Chemistry
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1
answer
117
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What is the cross-race effect?
asked
Jan 17
in
Psychology
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1
answer
45
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According to Piaget's cognitive development theory, how does knowledge develop?
asked
Jan 16
in
Psychology
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1
answer
92
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What is 'neural plasticity'?
asked
Jan 14
in
Psychology
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votes
1
answer
60
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What is the difference between in-group and out-group bias?
asked
Jan 10
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Psychology
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1
answer
67
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Why would prokaryotes be chemotrophs instead of phototrophs in a deep-sea hydrothermal vent?
asked
Jan 8
in
Science
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1
answer
62
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Which common oxidizing agent can be used to oxidize alcohols?
asked
Jan 8
in
Science
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votes
1
answer
19
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What type of change has occurred when a copper penny changes color?
asked
Jan 8
in
Science
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1
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81
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What plant hormone allows plants to curve in a specific direction?
asked
Jan 7
in
Science
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