Answer:
16.54 mL
Explanation:
From the question;
- Density of mercury of 13.6 g/mL
- Mass of the mercury metal is 225 g
We are needed to determine the volume of the mercury metal;
We need to know that;
- Density is given by dividing the mass of a substance by its volume.
That is;
Density = Mass ÷ Volume
Rearranging the formula;
Volume = Mass ÷ Density
Therefore;
Volume = 225 g ÷ 13.6 g/mL
= 16.54 mL
Thus, the volume of the mercury needed is 16.54 mL
Answer:
For the control experiment: 
of aqueous solution of erioglaucine has absorbance of 
From Lambert-Beer's law we know:
Here; e is the molar absorptivity coefficient of erioglaucine
l = length of cuvette in which the solution is taken = 
A sorbance by the erioglaucine = total absorbance - absorbance by distilled 
So; by putting the values in the above equation; we get:
So; 
The molar absorptivity coefficient of erioglaucine is 
The absorbance of erioglaucine in distilled water (contaminated with metal ions) is: 
The absorbance of distilled water is 
So; absorbance of erioglaucine itself is : 
Again using Lambert Beer law; we get:
c = 0.198/5.65 M = 0.035 M
The concentration of the erioglaucine is
Explanation:
Answer: The protection of the environment.
Explanation: An ecologist refers to an individual who handles the ecosystem and its constituents to perform surveys and evaluate the behavior and diversity of various species. They examine the association between the surrounding and its living things. They work for environmental consulting agencies, NGOs, and the government, and helps them in doing research and creating protocols and rules for the protection of the environment.
D is the answer. A, B,C are absurd. Doing a little word right there.
