2 years ago

What is an atomic nucleus?

Chemistry

1 answer:

Blababa [14]2 years ago

3 0

Answer:

The atomic nucleus is the small, dense region consisting of protons and neutrons at the center of an atom

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Which kind of reaction does this graph represent?

kolbaska11 [484]

Answer:

THE CORRECT ANSWER IS B

endothermic because /\ Hrxn = 876.8 kJ

Explanation:

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3 years ago

5. If you evaluated 5 solvents as possible recystallization solvents do you think it is generally true that the solvent which ap

vesna_86 [32]

Answer:

impurities

Explanation:

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2 years ago

onsider the isomerization of butane with an equilibrium constant of . The system is originally at equilibrium with [butane] = 1.

Alborosie

Answer:

The equilibrium concentration of Butane = 1.17 molar and isobutane = 2.93 molar

Explanation:

Consider equilibrium constant for the isomerisation reaction of butane and isobutane at 25⁰C = 2.5

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3 years ago

The [α] of pure quinine, an antimalarial drug, is −165. If a solution contains 86% quinine and 14% of its enantiomer (ee = 72%),

ratelena [41]

Answer : The [α] for the solution is, -118.8

Explanation :

Enantiomeric excess : It is defined as the difference between the percentage major enantiomer and the percentage minor enantiomer.

Mathematically,

$\%\text{ Enantiomer excess}=\%\text{ Major enantiomer}-\%\text{ Minor enantiomer}$

Given:

% major enantiomer = 86 %

% minor enantiomer = 14 %

Putting values in above equation, we get:

$\%\text{ Enantiomer excess}=86\%-14\%=72\%$

$\text{ Enantiomer excess}=\frac{72}{100}=0.72$

Now we have to calculate the [α] for the solution.

$[\alpha]=\text{Enantiomer excess}\times [\alpha]_{Pure}$

$[\alpha]=0.72\times -165$

$[\alpha]=-118.8$

Thus, the [α] for the solution is, -118.8

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3 years ago

What best describes why a liquid needs a container when a solid does not?

kvv77 [185]

Because if you have a liquid then you need a glass to keep it together and when it is a solid it is already together so you don't need to do anything

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3 years ago

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