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Zolol [24]
4 years ago
5

You are performing a gradient elution and are instructed to begin with a low polarity solvent (petroleum ether) and continue to

increase solvent polarity with MTBE. Why are the mobile phases added in order of increasing polarity rather than in the order of decreasing polarity?
Chemistry
1 answer:
Sophie [7]4 years ago
3 0

Answer:

The eluting strength of a solvent is primarily related to how strongly it adsorbs onto the  adsorbent and because typical adsorbents are highly polar; thus, eluting strength increases  with solvent polarity.

Explanation:

The polarity of a solvent makes it more suitable for elution in a polar adsorbent. Hence the choice of solvents should be in order of increasing rather than decreasing polarity. polarity must increase and not decrease

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When the following molecular equation is balanced using the smallest possible integer coefficients, the values of these coeffici
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<u>Answer:</u> The molecular balanced equation is written below

<u>Explanation:</u>

A molecular equation is defined as the chemical equation in which the ionic compounds are written as molecules rather than component ions.

A balanced chemical equation is defined as the equation in which total number of individual atoms on the reactant side is equal to the total number of individual atoms on product side.

The balanced chemical equation for the decomposition of bromine trifluoride follows:

2BrF_3\rightarrow Br_2+3F_2

By Stoichiometry of the reaction:

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Debora [2.8K]

8.98

×

N

A

 

cobalt atoms

Explanation:

N

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,

Avogadro's number

specifies  

6.0221

×

10

23

individual particles. It is simply another collective number like a dozen, or a score, or a gross.  

N

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has the property that  

6.0221

×

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individual cobalt atoms has a mass of  

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⋅

g

. How did I know that? Did I have it memorized?

So the quantity is  

≈

 

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cobalt atoms.

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A typical human hair is about 1 million carbon-12 atoms JUST IN WIDTH.

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