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Recent activity by CandraIdk507
1
answer
82
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How Do Different Polymer Structures Affect the Rheological Properties of Polymer Melts at Varying Temperatures?
asked
Feb 24
in
Polymer Chemistry
1
answer
91
views
What is the rate constant of a first-order reaction that has a half-life of 10 seconds and an initial concentration of 0.1 M?
asked
Feb 22
in
Physical Chemistry
1
answer
78
views
What chemical reaction occurs during the decomposition of potassium chlorate, and what are the products formed?
answered
Feb 19
in
Chemical reactions
1
answer
87
views
How does the change in the electronic and optical properties of perovskite materials affect the efficiency of solar cells made from these materials?
answered
Feb 18
in
Quantum Chemistry
1
answer
90
views
What is the balanced chemical equation for the synthesis reaction between iron and sulfur to form iron(II) sulfide?
answered
Feb 17
in
Chemical reactions
1
answer
91
views
How does the addition of a corrosion inhibitor affect the passivation process in the surface chemistry of metal corrosion?
asked
Feb 17
in
Surface Chemistry
1
answer
101
views
What is the mechanism for the acid-catalyzed hydration of alkenes and its intermediates?
answered
Feb 17
in
Organic Chemistry
1
answer
107
views
Which polymer-based membrane material(s) show the best performance for removing heavy metals from wastewater in the context of water treatment?
asked
Feb 14
in
Polymer Chemistry
1
answer
123
views
Using electrophilic addition reactions, explain the mechanism of the addition of HBr to propene and predict the major product formed.
answered
Feb 13
in
Organic Chemistry
1
answer
85
views
How can we design a polymer-based optical material with enhanced light absorption properties for solar cell applications?
asked
Feb 12
in
Polymer Chemistry
1
answer
119
views
How does the coordination chemistry of metalloproteins play a crucial role in determining their biological activity? Provide specific examples of metalloproteins and their coordination environments to support your answer.
answered
Feb 12
in
Coordination Chemistry
1
answer
106
views
How can the effect of reaction rate on reaction safety be investigated for a specific chemical reaction?
asked
Feb 7
in
Chemical kinetics
1
answer
94
views
How can inadequate training for chemistry teachers affect the learning outcomes of students in chemistry classes?
asked
Feb 5
in
Chemical education
1
answer
110
views
How can practical applications of chemistry be integrated into the curriculum to better prepare students for real-world applications in the field?
asked
Feb 5
in
Chemical education
1
answer
114
views
Calculate the standard enthalpy change for the vaporization of 1 mole of water at 100°C, given that the enthalpy of fusion of water is 6.01 kJ/mol and the enthalpy of vaporization of water is 40.7 kJ/mol.
asked
Feb 3
in
Chemical thermodynamics
1
answer
154
views
What is the effect of adding a catalyst on the equilibrium position of the redox reaction between potassium permanganate (KMnO4) and oxalic acid (H2C2O4)? Calculate the new equilibrium constant (Kc) and explain how the addition of the catalyst affects the forward and reverse reaction rates.
answered
Jan 30
in
Chemical equilibrium
1
answer
146
views
What is the concentration of lead (Pb) in a water sample collected from a nearby river, using atomic absorption spectroscopy?
answered
Jan 30
in
Analytical Chemistry
1
answer
114
views
Calculate the enthalpy of oxidation of methane gas ($CH_4$) when it is burned completely in the presence of excess oxygen gas ($O_2$), given that the standard enthalpy of formation of $CH_4$ is -74.8 kJ/mol and the standard enthalpy of formation of $H_2O$ is -285.8 kJ/mol.
answered
Jan 23
in
ThermoChemistry
1
answer
92
views
Calculate the amount of heat absorbed when 20 grams of ice at -10°C is melted and then warmed to 30°C. The specific heat of ice is 2.09 J/g°C, the specific heat of water is 4.18 J/g°C and the enthalpy of fusion of ice is 6.01 kJ/mol.
answered
Jan 23
in
ThermoChemistry
1
answer
219
views
How can normative influence be used for social change?
answered
Jan 17
in
Psychology
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