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User LeoQuinonez1
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What functional group(s) are present in the given compound and at what wavelength do they absorb maximum in UV-Vis spectroscopy?
asked
Jan 30
in
Analytical Chemistry
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votes
1
answer
8
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How can the concentration of lead in a sample of water be determined using atomic absorption spectroscopy? What factors should be taken into consideration when preparing the sample and running the analysis? What is the limit of detection for lead using this method, and how does it compare to other methods for detecting heavy metals in water samples?
asked
Jan 29
in
Analytical Chemistry
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1
answer
58
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Calculate the enthalpy of desorption for the process of magnesium oxide (MgO) surface drying at a temperature of 500 K, given that the equilibrium pressure of water vapor above the dried MgO is 0.056 atm and the enthalpy of adsorption of water on MgO is -44.48 kJ/mol.
asked
Jan 23
in
ThermoChemistry
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votes
1
answer
73
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A student prepared a 0.2 M solution of sodium acetate and the equilibrium reaction for sodium acetate is CH3COO- + H2O ⇌ CH3COOH + OH-. The initial pH of the solution is 9. Calculate the new pH of the solution when 0.1 mol of NaOH is added to it.
asked
Jan 22
in
Chemical equilibrium
0
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1
answer
70
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A 0.25 mol/L solution of ethanoic acid (CH3COOH) is mixed with a 0.40 mol/L solution of sodium acetate (CH3COONa). The equilibrium constant for the reaction CH3COOH + NaCH3COO ⇌ CH3COONa + H2O is 1.8 x 10^-5. What is the concentration of CH3COONa at equilibrium?
asked
Jan 22
in
Chemical equilibrium
0
votes
1
answer
29
views
What is the Polygraph?
asked
Jan 17
in
Psychology
0
votes
1
answer
48
views
Please evaluate the executive control model of attention.
asked
Jan 16
in
Psychology
0
votes
1
answer
12
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What is the main criticism of cross-cultural psychology?
asked
Jan 16
in
Psychology
0
votes
1
answer
37
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According to cognitive behavioural therapy, how does changing negative thoughts affect mental health?
asked
Jan 16
in
Psychology
0
votes
1
answer
19
views
What is participative leadership?
asked
Jan 15
in
Psychology
0
votes
1
answer
72
views
What are the stages of Erikson's developmental theory of psychosocial development?
asked
Jan 14
in
Psychology
0
votes
1
answer
26
views
What is psychotherapy for personality disorders?
asked
Jan 14
in
Psychology
0
votes
1
answer
32
views
What is obedience?
asked
Jan 14
in
Psychology
0
votes
1
answer
78
views
What is the positivity effect theory?
asked
Jan 14
in
Psychology
0
votes
1
answer
30
views
What is the social intelligence theory?
asked
Jan 13
in
Psychology
0
votes
1
answer
46
views
What type of winds blow over a limited area?
asked
Jan 8
in
Science
0
votes
1
answer
39
views
What type of environment is maintained in homeostasis?
asked
Jan 8
in
Science
0
votes
1
answer
34
views
What takes place in the organelle known as the chloroplast, which distinguishes animal from plant cells?
asked
Jan 7
in
Science
0
votes
1
answer
43
views
What is the process where light bounces back from surfaces that it cannot pass through?
asked
Jan 7
in
Science
0
votes
1
answer
30
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What is the most dangerous type of radiation?
asked
Jan 7
in
Science
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