How do the general methods for separating mixtures and compounds differ?

1 answer:

5 0

There are several ways as to which the components of the mixtures and compounds are separated from one another. First, mixtures can be physically separated. These processes of separation include sifting, filtration, centrifugation, etc.

However, separation of the components of the compounds are rather more complicated as this involves chemical reaction and other heat intensive processes.

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How many moles of hexane (C6H14) must burn to form 18.4 mol of carbon dioxide?

avanturin [10]

The combustion reaction of hexane:

2 C6H14 + 19 O2 = 12 CO2 + 14 H2O

2 mol C6H14 ---------> 12 mol CO2
x mol C6H14 ---------> 18.4 mol CO2

12 * x = 18.4 * 2

12 x = 36.8

x = 36.8 / 12

x = 3.067 moles of CO2

hope this helps!.

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Write a resonance form for pyrrole in which nitrogen has a formal charge of 1. Are comparable resonance forms possible for pyrid

Svetach [21]

Answer:

See explanation and image attached

Explanation:

Here attached are resonance forms of pyrrole and pyridine. The images were obtained from quora and researchgate respectively.

Now, we can see that in the resonance forms of pyrrole, the nitrogen atom in the heterocycle has a formal charge of +1. However, in the six membered pyridine hetrocycle, the nitrogen atom may have a formal charge of -1 or +1 as shown in the canonical structures attached. The structures in which nitrogen has a +1 formal charge in pyridine are comparable to structures obtained from pyrrole. These structures have less contribution to the structure of pyridine.