Login
Remember
Register
Science Q&A Sarvan.Net
All Activity
Q&A
Questions
Hot!
Unanswered
Tags
Categories
Users
Ask a Question
About Us
XML Sitemap
Terms of Service
User KrystleFarth
Wall
Recent activity
All questions
All answers
Ask a Question
Questions by KrystleFarth
0
votes
1
answer
28
views
What is the optimum ratio of diisocyanate to polyol in the synthesis of polyurethane to achieve maximum mechanical strength?
asked
Feb 22
in
Chemical synthesis
0
votes
1
answer
42
views
What is the bond length between two oxygen atoms in a molecule of O2, given that the equilibrium bond distance of oxygen is 121 pm?
asked
Feb 18
in
Chemical bonding
0
votes
1
answer
39
views
What is the bond length between two carbon atoms in a molecule of ethylene (C2H4), given that the distance between the nuclei of the two carbon atoms is 1.33 Å? Additionally, what is the percent ionic character of the carbon-carbon bond?
asked
Feb 18
in
Chemical bonding
0
votes
1
answer
40
views
How does the absorption of light by molecules impact their electronic structure and subsequent photochemical reactions in complex materials, such as those found in solar cells?
asked
Feb 17
in
Quantum Chemistry
0
votes
1
answer
37
views
How do persistent organic pollutants (POPs) affect the aquatic environment in terms of biological magnification, and what measures can be taken to mitigate their impact?
asked
Feb 14
in
Environmental Chemistry
0
votes
1
answer
66
views
How can the structure and properties of a small molecule be optimized to improve its efficacy and safety as a treatment for hypertension, a condition often associated with cardiovascular diseases?
asked
Feb 11
in
Medicinal Chemistry
0
votes
1
answer
30
views
How can the photochemical properties of fluorescent dyes be utilized to study biological systems and what are the considerations that need to be made when selecting a fluorescent dye for a particular application in photochemistry?
asked
Feb 10
in
PhotoChemistry
0
votes
1
answer
39
views
How can chemistry students increase their exposure to current research in the field, and what resources are available to help them stay up-to-date with the latest advancements and discoveries?
asked
Feb 5
in
Chemical education
0
votes
1
answer
76
views
Determine the crystal structure of a compound with the empirical formula C6H12O6, given its X-ray diffraction pattern.
asked
Feb 4
in
Physical Chemistry
0
votes
1
answer
80
views
Calculate the standard molar enthalpy change for the following reaction using quantum chemistry and compare it with the literature value: 2H2(g) + O2(g) -> 2H2O(g) Literature Value: -572 kJ/mol
asked
Feb 3
in
Quantum Chemistry
0
votes
1
answer
78
views
Calculate the standard enthalpy of formation (ΔH°f) for butane (C4H10) given the following data:ΔH°f (kJ/mol)C(s) 0H2(g) 0C2H6(g) -84.7C3H8(g) -103.8Note: You may assume that butane undergoes complete combustion to form CO2(g) and H2O(l) and that the standard enthalpies of combustion for C4H10, CO2, and H2O are -2877.2, -393.5, and -285.8 kJ/mol, respectively.
asked
Feb 3
in
Chemical thermodynamics
0
votes
1
answer
74
views
How does changing the size of gold nanoparticles affect their thermodynamic stability when interacting with a solvent molecule? Use molecular dynamics simulations to investigate the differences in stability between nanoparticles with diameters of 5 nm, 10 nm, and 15 nm.
asked
Feb 3
in
Computational Chemistry
0
votes
1
answer
79
views
Calculate the lattice energy of calcium oxide (CaO) given the following information: - The ionic charges of calcium (Ca) and oxygen (O) are +2 and -2, respectively. - The distance between the Ca and O ions in the lattice is 2.36 Å. - The Madelung constant for CaO is 1.74.
asked
Jan 23
in
Inorganic Chemistry
0
votes
1
answer
79
views
Calculate the electronegativity difference between hydrogen (electronegativity of 2.20) and chlorine (electronegativity of 3.16) and determine the type of bond formed between them according to the electronegativity difference classification.
asked
Jan 23
in
Chemical bonding
0
votes
1
answer
104
views
A chemistry student wants to calculate the enthalpy change (∆H) upon hydrolysis of magnesium chloride (MgCl2). The student knows that the enthalpy of formation (∆Hf) of MgCl2 is -641 kJ/mol and the enthalpy of formation of water (∆Hf) is -286 kJ/mol. The balanced chemical equation for the hydrolysis of magnesium chloride is MgCl2 + 2H2O → Mg(OH)2 + 2HCl. Calculate the enthalpy change (∆H) of this reaction.
asked
Jan 22
in
ThermoChemistry
0
votes
1
answer
100
views
A chemical reaction was carried out at constant temperature and pressure. The initial concentration of the reactants and products were known. After a certain amount of time, the concentration of the reactants and products were measured. Using non-equilibrium thermodynamics, calculate the magnitude and sign of the entropy change of the system during the reaction.
asked
Jan 22
in
Physical Chemistry
0
votes
1
answer
69
views
What is the therapeutic use of interpretation in psychodynamic therapy?
asked
Jan 20
in
Psychology
0
votes
1
answer
43
views
What is the name of the theory that suggests that our behaviour is the result of the interactions between our genes and the environment?
asked
Jan 20
in
Psychology
0
votes
1
answer
40
views
Where do feature detection theories suggest processing of visual information occurs?
asked
Jan 17
in
Psychology
0
votes
0
answers
47
views
How might attribution theory impact end-of-life decision-making?
asked
Jan 17
in
Psychology
Page:
1
2
next »
37.4k
questions
37.2k
answers
2
comments
14.6k
users
Categories
All categories
Science
(12.0k)
Psychology
(10.5k)
Chemistry
(14.9k)
Welcome to Sarvan Science Q&A, where you can ask questions and receive answers from other members of the community.
...