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vladimir1956 [14]
3 years ago
9

______________________ produce evidence that helps to answer important questions or could also lead to new questions. A.investig

ations B. theories C.laws D. none of the above
Chemistry
2 answers:
V125BC [204]3 years ago
7 0

Answer: A. Investigation

Explanation:

siniylev [52]3 years ago
6 0

Answer:

B

Explanation:

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Answer:

The wavelength the student should use is 700 nm.

Explanation:

Attached below you can find the diagram I found for this question elsewhere.

Because the idea is to minimize the interference of the Co⁺²(aq) species, we should <u>choose a wavelength in which its absorbance is minimum</u>.

At 400 nm Co⁺²(aq) shows no absorbance, however neither does Cu⁺²(aq). While at 700 nm Co⁺²(aq) shows no absorbance and Cu⁺²(aq) does.

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insens350 [35]

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3 years ago
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