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4 years ago

Explain distillation and chromatography

1 answer:

6 0

Distillation is the action of purifying a liquid by a process of heating and cooling.
The definition of chromatography is "a process of separating out different parts of chemical mixtures onto an absorbent material that can then be individually analyzed because different parts are caught on the material at different rates."

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mezya [45]

Answer:bbn

Explanation:

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3 years ago

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4 years ago

A hot pot of water is set on the counter to cool. After a few minutes it has lost 495 J of heat energy. How much heat energy has

Brums [2.3K]

Answer:

495 J

Explanation:

When the hot pot was set on the counter to cool, heat energy was lost from the pot. Note that according to the first law of thermodynamics, heat is neither created nor destroyed.

This implies that, the heat energy lost from the pot must be gained by the surrounding air. Therefore, if 495 J of energy is lost from the pot, then 495 J of energy is gained by the surrounding air.

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3 years ago

If an element has 13 protons, how many electrons are in its outer shell?

stealth61 [152]

There will be three electrons in the outer shell.

7 0

4 years ago

The pOH of a solution is 9.70. what is the H+ concentration in the solution ?

Scrat [10]

Answer:

The H+ concentration is $10^{-4.3} M$

Explanation:

We know that for any solution,

pOH + pH = 14

Given,

pOH = 9.70,

Therefore using formula,we get,

pH = 14 - pOH,

pH = 14 - 9.70;

pH = 4.30

We also know,

If Concentration of H+ in a solution in C,

Then,

pH = -log(C) ------(Formula 1) and C = $10^{-pH}$ ----(Formula 2)

Therefore,

using formula 2, we get,

C = $10^{-pH}$

C = $10^{-4.30}$ M.

Therefore concentration of H+ in the given solution is $10^{-4.3} M$

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3 years ago