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yuradex [85]
3 years ago
15

Which is the basis of thin-layer chromatography?

Chemistry
1 answer:
solmaris [256]3 years ago
8 0

Answer:

B.) The drug gets carried through a stationary phase by a mobile phase and the retention time identifies the drug.

Explanation:

Chromatography is used in purifying complex mixtures of organic compounds. It uses the adsorption tendencies of compounds to seperate and identify them.

Chromatography is made up of two phases in contact, the stationary phase or non-mobile phase and the mobile phase. The movement of the mobile phase over the stationary phase causes the separation of a mixture into its constituents.

The stationary phase is made up of silica-gel or alumina in a solvent (an adsorbent) and the mobile phase or carrier is the organic solvent which is the drug.

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All of the cells in the body need oxygen. Hemoglobin molecules in red blood cells transport oxygen through the bloodstream. Oxyg
tankabanditka [31]

Answer:

High partial pressure of oxygen in the tissues.

Explanation:

Hemoglobin is a protein found in the red blood cells that is responsible for the transportation of oxygen from the lungs to the rest of the tissues in the body. The partial pressure determines whether oxygen is loaded or unloaded into the hemoglobin.

When there is lack of oxygen in our bodies, we experience hypoxia.

6 0
3 years ago
How much more acidic/more H+ concentration is a pH of 6 than pH of 8
DochEvi [55]

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Answer: 1000x

Explanation:

I hope this helped!

<!> Brainliest is appreciated! <!>

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7 0
2 years ago
Which of these statements are true? Select all that apply.
Anarel [89]
In order to find the two statements, we must first define what the enthalpy of formation and the enthalpy of reaction mean.

Enthalpy of formation:
The change in enthalpy when one mole of substance is formed from its constituent elemetns at standard state.

Enthalpy of reaction:
The change in enthalpy when a reaction occurs and the reactants and products are in their standard states.

Now, we check the statements. The true ones are:

The Hrxn for C(s) + O₂(g) → CO₂(g) is the same as Hf for CO₂
This is true because the formation of carbon dioxide requires carbon and oxygen in their standard states.

T
he Hf for Br₂<span>(l) is 0 kJ/mol by definition.
Because the bromine is present in its standard state, the enthalpy of formation is 0.

</span><span>The Hrxn for the reaction 1.5H</span>₂<span>(g) + 0.5N</span>₂<span>(g) </span>→ <span>NH</span>₃<span>(g) is the same as the Hf for NH</span>₃<span>(g)
The reactants and products are present in their standard state, and the reaction is the same as the one occurring during the formation of ammonia.
</span>
4 0
3 years ago
Read 2 more answers
8. [06.02]
Kruka [31]

Answer:

Exothermic reaction  

Explanation:

Consider the reaction

A + B ⟶ C

If energy is released, the product C is at a lower potential energy level than the reactants A and B (see diagram).

Conversely, the reactants A and B are at a higher energy level than the product.

B is wrong. In an endothermic reaction, the reactants A and B are at a lower energy level than the product.

C and D are both wrong. Both types of reaction can be exo- or endothermic.

8 0
2 years ago
5. How many cubic centimeters are in one 0.354 L can of soda?
grandymaker [24]
C.354
1L/1000cm^3
0.354L/ycm^3 *1L/1000cm^3
Cross multiply 0.354 by 1000and then divide by one to get 354.

8 0
3 years ago
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