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0
votes
6
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What is the most effective analytical method to determine pesticide residues in food samples and how do these residues affect human health over a long period of time?
answered
4 days
ago
in
Environmental Chemistry
0
votes
14
views
What mass of NaOH (in grams) is needed to react completely with 25.0 g of HCl according to the following balanced chemical equation?2NaOH(aq) + H2SO4(aq) → Na2SO4(aq) + 2H2O(l)
answered
5 days
ago
in
Chemical reactions
0
votes
36
views
What are the different types of liquid crystals and how do their physical properties vary from each other?
answered
Feb 13
in
Physical Chemistry
0
votes
32
views
What is the effect of increasing the pH of a solution containing the redox system, Fe2+/ Fe3+ on the equilibrium concentration of Fe2+ at 25°C?
answered
Feb 13
in
Chemical equilibrium
0
votes
35
views
How can limited opportunities for hands-on experimentation in chemistry affect a student's overall understanding and appreciation of the subject?
answered
Feb 5
in
Chemical education
0
votes
50
views
Calculate the standard enthalpy change for the formation of ammonium chloride (NH4Cl) from its constituent elements, nitrogen (N2), hydrogen (H2), and chlorine (Cl2), given the following information:Reaction equation: N2(g) + 4H2(g) + 2Cl2(g) → 2NH4Cl(s)Standard enthalpy of formation for NH4Cl: -314.4 kJ/molStandard enthalpy of formation for N2(g): 0 kJ/molStandard enthalpy of formation for H2(g): 0 kJ/molStandard enthalpy of formation for Cl2(g): 0 kJ/mol Express your answer in kilojoules per mole (kJ/mol).
answered
Feb 3
in
Chemical thermodynamics
0
votes
52
views
Calculate the enthalpy change of combustion for ethane (C2H6) given that the standard enthalpy of formation for ethane is -84.68 kJ/mol, the standard enthalpy of formation for CO2 is -393.5 kJ/mol, and the standard enthalpy of formation for H2O is -241.8 kJ/mol.
answered
Jan 23
in
ThermoChemistry
0
votes
31
views
When using operant conditioning in parenting, what is suggested for punishment?
answered
Jan 20
in
Psychology
0
votes
33
views
When evaluating a theory, what is the criterion for objectivity?
answered
Jan 20
in
Psychology
0
votes
34
views
According to the demand characteristics theory, what do participants tend to do when they perceive the aims of a study?
answered
Jan 20
in
Psychology
0
votes
11
views
How does existential psychology view death?
answered
Jan 17
in
Psychology
0
votes
41
views
Where does the theory evaluation process begin?
answered
Jan 16
in
Psychology
0
votes
41
views
Where are standardised effect sizes commonly used?
answered
Jan 16
in
Psychology
0
votes
53
views
What is the difference between efficacy and effectiveness?
answered
Jan 16
in
Psychology
0
votes
38
views
When did Tajfel conduct his minimal group experiments?
answered
Jan 15
in
Psychology
0
votes
38
views
When does the Social Learning Theory suggest learning occurs?
answered
Jan 15
in
Psychology
0
votes
42
views
What is episodic acute stress?
answered
Jan 14
in
Psychology
0
votes
57
views
What is stigma?
answered
Jan 14
in
Psychology
0
votes
32
views
What is obedience?
answered
Jan 14
in
Psychology
0
votes
30
views
Which water from the equator mixes with cold water from the poles?
answered
Jan 8
in
Science
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