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vlabodo [156]
3 years ago
10

The table shows the average distance between the molecules of a substance in the solid, liquid, and gaseous states.

Chemistry
1 answer:
Pavlova-9 [17]3 years ago
7 0

Answer:

Y > X > Z

Explanation:

The intermoecular forces refer to forces that exist between molecules of a substance. They are the secondary bond forces that hold particles of a substance together in a particular state of matter.

The shorter the distance between molecules, the greater the magnitude of intermolecular force between the molecules.

The molecules of Y are at the shortest distance from each other hence they have the highest magnitude of intermolecular forces. Followed by X and lastly Z with the greatest distance between the largest intermolecular distance.

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Who arranged the elements into the first periodic table?
emmasim [6.3K]

Answer:

Chemist Dmitri Mendeleev

5 0
3 years ago
The ka of hf is 6.8 x 10-4. what is the ph of a 0.35 m solution of hf?
damaskus [11]
When the reaction equation is:

HF ↔ H+   +   F-

and when the Ka expression
= concentration of products/concentration of reactions

so, Ka = [H+][F-]/[HF]

when we assume:

[H+] = [F-] = X

and [HF] = 0.35 - X

So, by substitution:

6.8 x 10^-4 = X^2 / (0.35 - X) by solving for X

∴ X = 0.015 M

∴[H+] = X = 0.015

when PH = -㏒[H+]

∴PH = -㏒0.015

        = 1.8
6 0
3 years ago
If 0.64 mol PCl5 is placed in a 1.0 L flask and allowed to reach equilibrium at a given temperature, what is the final concentra
patriot [66]

Answer: The final concentration of Cl_2 at equilibrium is 0.36 M

Explanation:

Moles of  PCl_5 = 0.64 mole  

Volume of solution = 1.0 L

Initial concentration of PCl_5 = \frac{moles}{Volume}=\frac{0.64mol}{1.0L}=0.64 M

The given balanced equilibrium reaction is,

                     PCl_5(g)\rightleftharpoons PCl_3(g)+Cl_2(g)

Initial conc.       0.64 M         0M        0M  

At eqm. conc.     (0.64-x) M   (x) M      (x) M

The expression for equilibrium constant for this reaction will be,

K_c=\frac{[Cl_2]\times [PCl_3]}{[PCl_5]}  

Now put all the given values in this expression, we get

0.47=\frac{(x)\times (x)}{(0.64-x)}

By solving the term 'x', we get :

x = 0.36

Thus, the final concentration of Cl_2 at equilibrium is x = 0.36 M

6 0
3 years ago
Which is more metallic BE OR B in periodic table?why?​
lesya [120]

boron because the farther down the table you go the stronger the elements get

5 0
3 years ago
Question 2 of 30
icang [17]

Answer: D

Explanation:

Reduction involves the gaining of electrons.

  • This eliminates choices A and C.

However, charge must be balanced, and this is not the case for choice B, but it is the case for choice D

7 0
2 years ago
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