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1
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41
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How can we explain the formation and properties of common household acids and bases, such as vinegar or baking soda, using fundamental principles of chemistry?
asked
Feb 20
in
Chemical education
0
votes
1
answer
22
views
What is the electronegativity difference between the oxygen atom and the hydrogen atom in a molecule of water (H2O)?
asked
Feb 20
in
Chemical bonding
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votes
1
answer
38
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What is the balanced chemical equation for the synthesis of magnesium oxide?
asked
Feb 17
in
Chemical reactions
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1
answer
33
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What is the activation energy for the electrochemical reaction between zinc and hydrochloric acid at room temperature? Provide calculations to support your answer.
asked
Feb 17
in
ElectroChemistry
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votes
1
answer
124
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How does the increased level of nutrients in water bodies, particularly nitrogen and phosphorus, lead to eutrophication, and what are the various effects of eutrophication on the aquatic ecosystem?
asked
Feb 13
in
Environmental Chemistry
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votes
1
answer
15
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Calculate the percent composition of phosphoric acid, H3PO4.
asked
Feb 3
in
Inorganic Chemistry
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votes
1
answer
105
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What is the dipole moment of a water molecule, as calculated using ab initio methods, and how does it compare to the experimentally measured value?
asked
Jan 30
in
Computational Chemistry
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votes
1
answer
90
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Calculate the enthalpy change when 2.5 moles of methane gas is completely burned in excess oxygen gas if the enthalpy of formation of methane is -74.8 kJ/mol and the enthalpy of formation of water is -285.8 kJ/mol, and the enthalpy of formation of carbon dioxide is -393.5 kJ/mol.
asked
Jan 23
in
ThermoChemistry
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votes
1
answer
81
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Calculate the enthalpy change for the reaction: 2H2(g) + O2(g) → 2H2O(l) using Hess's law given the following reactions: 2H2(g) + O2(g) → 2H2O(g) ΔH1 = -483.6 kJ/mol 2H2O(g) → 2H2O(l) ΔH2 = -40.7 kJ/mol
asked
Jan 23
in
ThermoChemistry
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votes
1
answer
89
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A chemistry student needs to analyze the composition of a soil sample using elemental analysis. The student has to determine the percentage of carbon, nitrogen, and sulfur present in the sample. How can the student perform elemental analysis and calculate the percentage of each element in the soil sample accurately?
asked
Jan 22
in
Analytical Chemistry
0
votes
1
answer
79
views
Why did the Stanford Prison Experiment have to be terminated prematurely?
asked
Jan 20
in
Psychology
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1
answer
89
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When did psychometric testing begin?
asked
Jan 20
in
Psychology
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votes
1
answer
65
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Where was B. F. Skinner's operant conditioning research conducted?
asked
Jan 17
in
Psychology
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votes
1
answer
43
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Where might the scope of a theory be limited in organisational psychology?
asked
Jan 16
in
Psychology
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votes
1
answer
32
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What is a limitation of the gate control theory?
asked
Jan 16
in
Psychology
0
votes
1
answer
134
views
Who proposed the regret theory?
asked
Jan 15
in
Psychology
0
votes
1
answer
92
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According to the schema theory, how do we organise and make sense of new information?
asked
Jan 15
in
Psychology
0
votes
1
answer
97
views
What is predator-prey interaction?
asked
Jan 14
in
Psychology
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votes
1
answer
98
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What is a two-tailed test?
asked
Jan 14
in
Psychology
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1
answer
76
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What is cultural competence?
asked
Jan 14
in
Psychology
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