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3 years ago

Someone please explain molecular orbital in Xenon difluoride ( XeF2).

Chemistry

1 answer:

kotegsom [21]3 years ago

8 0

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Calculate the molar solubility of CaCO3 in 0.250M Na2CO3 Kps CaCO3 is 4.96x10-9

Yuliya22 [10]

Answer:

solubility is 1.984x10⁻⁹M

Explanation:

When CaCO₃ is in water, the equilibrium that occurs is:

CaCO₃(s) ⇄ Ca²⁺(aq) + CO₃²⁻(aq)

Kps = [Ca²⁺] [CO₃²⁻] = 4.96x10⁻⁹

If you have a 0.250M solution of Na₂CO₃, [CO₃²⁻] = 0.250M:

[Ca²⁺] [0.250M] = 4.96x10⁻⁹

Assuming you are adding an amount of CaCO₃:

[X] [0.250 + X] = 4.96x10⁻⁹

Where X is the amoun of CaCO₃ you can add, that means, solubility

X² + 0.250X - 4.96x10⁻⁹ = 0

Solving for X:

X = -0.25M → False answer, there is no negative concentrations.

X = 1.984x10⁻⁹M.

That means, solubility is 1.984x10⁻⁹M

3 0

3 years ago

Read 2 more answers

A weak base is titrated with a hydrochloric acid solution. What is the pH at the equivalence point?A) equal to pKaB) equal to 7C

zvonat [6]

Answer:

E) less than 7

Explanation:

pH is defined as the negative logarithm of the concentration of hydrogen ions.

Thus,

pH = - log [H⁺]

pH scale generally runs from 1 to 14 where pH = 7 represents neutral medium, pH < 7 represents acidic medium and pH > 7 represents basic medium.

Strong acids dissociate completely and when they react with base they form a salt of weak base and strong acid.

For example, $BOH$ is a weak base and $HCl$ is the hydrochloric acid.

So,

$BOH+HCl\rightarrow BCl+H_2O$

Thus, the salt is of weak base and strong acid which corresponds to pH less than 7.

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4 years ago

Interpret the electron configuration

Svetach [21]

Answer:

Ca for calcium

20 electrons

2-2s electron

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3 years ago

How many hydrogen atoms are in an acyclic alkane with 13 carbon atoms

pashok25 [27]

Answer:

Explanation:

CnH2n+2 is the general molecular forma for a acyclic alkane

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4 years ago

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What is the molecule shown below?

arsen [322]

Answer:

2,3 -Dimethyl pentane

Explanation:

The given molecule is 2,3-Dimethyl pentane.

First of all select the longest chain of C-C atom. This will be the parent name.

In given structure the longest chain is straight chain that contain five carbon. Thus the parent name will pentane and there is no double or triple bond the given structure is of alkane.

Than locate the positions of functional groups attached.

In given structure there are two methyl groups are present. Give the name in such a way that functional groups will have lowest number. In given case we will start from the left.

The first methyl group will have number 2 and second will have number 3.

The name will be,

2,3-Dimethyl pentane

8 0

3 years ago

Someone please explain molecular orbital in Xenon difluoride ( XeF2).​

Someone please explain molecular orbital in Xenon difluoride ( XeF2).