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0
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What is the concentration of iron (Fe) in a sample of river water using spectrophotometry at a wavelength of 510 nm? Given that the absorbance value of the sample at 510 nm is 0.42, and the molar absorptivity of iron (Fe) at that wavelength is 18,000 M^-1 cm^-1.
answered
6 days
ago
in
Analytical Chemistry
0
votes
6
views
A chemistry student wants to buffer a solution with a pH of 4.5. The student adds 0.1 mol of a weak acid buffer to 0.1 mol of a conjugate base. Taking the pKa value of the buffer into consideration, determine how much stronger an acid in the same buffer system would need to be added to the solution to shift the pH from 4.5 to 4.0, assuming temperature and pressure are constant.
answered
Jan 22
in
Chemical equilibrium
0
votes
17
views
According to the opponent process theory, what causes the color afterimage effect?
answered
Jan 20
in
Psychology
0
votes
51
views
Who proposed the Dual Process Model of Coping with Bereavement?
answered
Jan 20
in
Psychology
0
votes
16
views
Who rejected the reductionist approach to perception?
answered
Jan 17
in
Psychology
0
votes
23
views
According to the Conservation of Resource theory, what is the main challenge for people undergoing end-of-life issues?
answered
Jan 16
in
Psychology
0
votes
11
views
What is the difference between inter-sexual and intra-sexual selection?
answered
Jan 15
in
Psychology
0
votes
30
views
The concept of self-efficacy originated from which psychological theory?
answered
Jan 15
in
Psychology
0
votes
36
views
What is cognitive-behavioural therapy (CBT)?
answered
Jan 14
in
Psychology
0
votes
17
views
What is linear perspective?
answered
Jan 14
in
Psychology
0
votes
7
views
Compare and contrast the cross-sectional and sequential research designs.
answered
Jan 10
in
Psychology
0
votes
19
views
What kind of energy positions do electrons occupy during ground state?
answered
Jan 7
in
Science
0
votes
41
views
What is the term for the arrangement of veins in a leaf?
answered
Jan 7
in
Science
0
votes
58
views
What do farmers use greenhouses for?
answered
Jan 6
in
Science
0
votes
36
views
What property does liquid display when it interacts with glass?
answered
Dec 28, 2024
in
Science
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