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Yuki888 [10]
3 years ago
8

Hydrophobic compounds dissolve in Select one: a. ionic solvents O b. low dielectric constant solvents c. high dielectric constan

t solvents d. polar solvents such as water O If formulating an aqueous solution for parenteral administration, filtered and sterile pyrogen free water must be used. Select one: O True O False
Chemistry
1 answer:
kykrilka [37]3 years ago
7 0

Explanation:

(1.)   A hydrophobic compound is defined as the compound that does not dissolve in water and they contain no charge. Hydrophobic compounds are generally organic in nature.

  • As a result, there occurs no interaction between an ionic compound and hydrophobic compound. This is because ionic solvents or compounds are charged species and hydrophobic compounds do not contain any charge.

Hence, there occurs no interaction between the two.

  • Whereas lower is the dielectric constant of a solvent, less polar it will be in nature. Hence, smaller is the value of a dielectric constant more readily and easily it is able to dissolve a hydrophobic compound.
  • On the other hand, higher is the value of dielectric constant more polar the substance will be in nature. As a result, hydrophobic substance will not dissolve in high dielectric constant solvents and polar solvents such as water.

(2.)   Pyrogen is defined as any substance that is able to cause fever. Bacterial pyrogens are endotoxins and exotoxins.

And, if both of these toxins are not removed from the body then they tend to interact with the mechanism of drug interaction and hence, these lead to unexpected side effects.

Therefore, the statement if formulating an aqueous solution for parenteral administration, filtered and sterile pyrogen free water must be used, is true.

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Studentka2010 [4]

Answer:

When one desires to remove debris from the garden then a soil sifter can be used as a beneficial tool. Based on the needs, it can be of different kinds. A landscaper may sift soil that they use at the time of constructing gardens due to many reasons:  

1. The soil becomes aerated, and thus, turn soft and easy to work upon.  

2. Sifting the soil makes the work of withdrawing undesired substances from the soil easy.  

3. It helps the plants to grow much better as the roots possess the tendency to penetrate more easily through the soil.  

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6 0
3 years ago
What are the three missions of the ISS
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4 0
3 years ago
which two will help you measure how different colors absorb the energy in sunlight is it beaker or thermometer
KATRIN_1 [288]
Beaker does thermometer measures the thermal energy in the air
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Thermal expansion occurs when particles of matter move farther apart as temperature increase. True or false ?
IceJOKER [234]

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3 0
2 years ago
Photosynthesis was another biological phenomenon that occupied the attention of the chemists of the late 18th century. The demon
balu736 [363]

Answer:

In the 1770s, the English clergyman Joseph Priestley (who is credited with the discovery of O2) established the production of oxygen by vegetables recognizing that the process was, apparently, the inverse of animal respiration, which consumed such chemical element.

Explanation:

In 1772, Joseph Priestley in his Recherches sur diversces especes d'air differentiated the air of animal respiration from that emitted by vegetables in the presence of light. Of the latter, which he called "dephlogistic air", he highlighted his purifying property of the environment indicating that: plants far from affecting the air in the same way as animal respiration, produce the opposite effects, and tend to preserve the sweet and healthy atmosphere , when it becomes harmful as a result of the life and breathing of the animals or their death and their rot.

In 1780, Jean Ingeshousz in his Experiences sur les vegetaux completed and reaffirmed the observations of Joseph Priestley. At the same time, he could deny Charles Bonnet's hypothesis, by demonstrating that the air expelled from the leaves comes from inside, and that the stimulating factor of the gaseous emission was not the heat produced by the sun, but the intensity of the light .

It was, finally, Jean Senebier that between 1782 and 1784, found that the "fixed air" dissolved in the water favors the vegetation. From these observations, he hypothesized that "fixed air" (carbon dioxide) is absorbed by the plants, which take it from the atmosphere with the humidity it has and in which it is mixed. Once this gas has been captured, both from the atmosphere and from the ground, it is decomposed in the presence of light by the leaves, releasing the "vital air" (oxygen) and leaving the carbon in the plant.

Thus, at the end of the century the participation of the atmosphere in plant dynamics was already seated, although the how and why of this participation were still unknown and no theory had been formulated to explain the nutritional process as a whole.

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