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Luda [366]
2 years ago
8

What are four characteristics of a good extraction solvent?

Biology
1 answer:
ella [17]2 years ago
4 0

A good extraction solvent should have a strong solubilizing capability for the compound of interest, it should be immiscible or only weakly misciblewith the matrix solvent ( the first solution or mixture containing the compound from its natural source, e.g., water/ether. water/ chloroform, etc. If possible the extraction solvent should be non-flammable, non-toxic or of low toxicity, reasonably volatile, and of low eco-impact. Inexpensive and available, of high purity , and shelf stable. If one is determining the compound of interest by UV/Vis spectrophotometry or fluorescence, the solvent should have extremely low absobance or emission at the wavelength of analysis

• high solubility for the solute and low solubility for the carrier liquid.

• density difference vs. the carrier liquid greater than 150 kg/m. ...

• mid-level interfacial tension (5–30 dyne/cm)

• high resistance to thermal degradation.


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The cause of a change in an organism environment that affects the activity of an organism
Elis [28]

Answer:

Ecological Niche. The functional role of an organism or a species in the ecosystem, including its relationships with other species. ecology. The study of the distribution, abundance, and interrelationships of organisms and their interactions with the environment. Ecosystem

Explanation:

4 0
2 years ago
a circle fence sourrounding a small yard mesure 84 meters in length if you walk from one side from the other through the middle
anygoal [31]

Answer: 26.75 meters.

2πr = 84

2 * 3.14 * radius = 84

radius = 84/6.28

r= 13.375

So the diameter will be 13.375 + 13.375 which is 26.75 meters.

4 0
2 years ago
The Smiths went to dinner at Cheesecake Factory and their bill was $123.75 plus 7.5% sales tax. What is the total bill? Round to
Vikentia [17]

The total bill that was given to the Smiths at the Cheesecake factory was $133.03

An equation is an expression used to show the relationship between two or more numbers and variables.

Given that the Smiths bill was $123.75 plus 7.5% sales tax. Hence:

Total bill = $123.75 + Sales tax

Sales tax = 7.5% of bill = 0.075 * $123.75 = $9.28

Total bill = $123.75 + $9.28 = $133.03

The total bill that was given to the Smiths at the Cheesecake factory was $133.03

Find out more at: brainly.com/question/21105092

5 0
2 years ago
What does a pyramid of biomass represent? A. Range of food webs found in one trophic level B. Percentage of energy that's passed
Klio2033 [76]

The pyramid of biomass represents a range of food webs found in one trophic level

A pyramid of biomass refers to graphical representation of biomass that is present per unit area of all the various trophic levels of the ecosystem.

<h2>Further Explanation</h2>

The graphical representation shows the relationship between biomass and trophic level that quantify the biomass that is present in each trophic level of energy community at a given period of time.

There are two types of pyramid of biomass, they include

  • Inverted pyramid of biomass  
  • The upright pyramid of biomass  

Inverted pyramid of biomass: a very good example of inverted pyramid can be seen in a case of pond ecosystem, where major producers in the ecosystem (mass of phytoplankton) will be lower than the mass of heterotrophs, such as insects.  

The upright pyramid: The first thing on the upright pyramid is the producers, such as plants. The plants are present at the bottom level of the pyramid and followed by consumers.

Within the pyramid, the highest level is occupied by the carnivores; they are the lowest quantified amount of biomass. In upright pyramid the total weight of the producers is far more than when the weights of all the consumers are combined.  

However, the main issues with the pyramid of biomass are that every trophic level of the pyramid seems to have more energy than it does.

LEARN MORE:

  • pyramid of biomass brainly.com/question/12655542

KEYWORDS:

  • pyramid of biomass
  • trophic level
  • consumers
  • graphical representation
  • ecosystem
8 0
2 years ago
Read 2 more answers
HEEEEEEEEEELLLLLLLLLLLLLLLLLPPPPPPPPPPPPPPPPPP.
dlinn [17]
Asexual reproduction is quicker since it <span>generates offspring that are genetically identical to a single parent.</span>
5 0
3 years ago
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