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swat32
2 months ago
10

The following data were obtained for a complex of nickel at 575 nm in a 1.00 cm cell. Using Microsoft Excel or some other graphi

ng program, construct a calibration plot and accurately calculate the molar absorptivity (ε) for the nickel-complex at 575 nm.
Standard # Nickel Complex Concentration (M) Absorbance
1 0.01 0.058
2 0.02 0.109
3 0.04 0.220
4 0.06 0.328

A. 0.184 M-1cm-1

B. 0.002 M-1cm-1

C. 5.425 M-1cm-1

D. Not Enough Information to Determine

Chemistry
1 answer:
castortr0y [3K]2 months ago
7 0
Please refer to the attached explanation below. It is widely acknowledged that variations in the complex formulations of metals significantly affect the conduction properties of molecular materials, which demonstrate unusual magnetic characteristics and conductivity, relevant to fields such as material chemistry, supramolecular studies, and biochemistry. The electrochemical behavior of nickel (Ni(II)) complexes was examined using techniques like cyclic voltammetry (CV), rotating coulometry, and disc electrode (RDE).
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A 85.2 g copper bar was heated to 221.32 degrees Celsius and placed in a coffee cup calorimeter containing 4250 mL of water at 2
eduard [2782]

Answer:- 64015 J

Solution: The calorimeter contains 4250 mL of water, which is at a temperature of 22.55 degrees Celsius.

The water's density is 1 gram per mL.

Thus, the mass of water = 4250mL(\frac{1g}{1mL}) = 4250 grams.

After introducing the hot copper bar, the final temperature of the water reaches 26.15 degrees Celsius.

Thus, \Delta T for the water = 26.15 - 22.55 = 3.60 degrees Celsius.

The specific heat capacity of water is 4.184 \frac{J}{g.^0C}.

To determine the heat absorbed by the water, we can use the following formula:

q=mc\Delta T

where q represents heat energy, m refers to mass, and c indicates specific heat.

Now let's substitute the values into the equation to perform the calculations:

q=4250g*\frac{4.184J}{g.^0C}*3.60^0C

q = 64015 J

Therefore, the water absorbs 64015 J of heat.



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3 months ago
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Tems11 [2777]
It looks like you overlooked the provided image necessary to address this inquiry. Nevertheless, I found it and have the solution. Referring to the topographical map of a segment of Charleston, SC, the feature located at the spot marked with an X represents the peak of a hill. The correct answer is option D.
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