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2 years ago

Particles in solids, liquids and gases move depending on how much energy they have.

2 answers:

6 0

Answer: True

Increased temperature will result in the particles gaining kinetic energy btw. Therefore the more energy the particles have, the faster they move. Hope this helps! :)

In addition: A solid’s particles will always have less energy than a liquid or gas’s particles. So solid particles have the least amount of energy, liquid has the second most amount of energy and gases have the most amount of energy.

mylen [45]2 years ago

5 0

Answer:

Explanation:

they move to create more energy witch keeps them moving

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What neutral element has the electron configuration described by the Aufbau diagram above.

devlian [24]

Answer:

Aluminium.

Explanation:

The above electronic configuration can be written in a simplified form as shown below:

1s² 2s²2p⁶ 3s²3p¹

Next, we shall determine the number of electrons in the atom of the element as follow:

Number electron = 2 + 2 + 6 + 2 + 1

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Next, we shall determine the number of protons.

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The acid dissociation constant Ka of boric acid (H3BO3) is 5.8 times 10^-10. Calculate the pH of a 4.4 M solution of boric acid.

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Explanation:

$H_3BO_3\rightarrow H^+H_2BO_3^-$

at t=0 cM 0 0

at eqm $c-c\alpha$ $c\alpha$ $c\alpha$

So dissociation constant will be:

$K_a=\frac{(c\alpha)^{2}}{c-c\alpha}$

Give c= 4.4 M and $\alpha$ = ?

$K_a=5.8\times 10^{-10}$

Putting in the values we get:

$5.8\times 10^{-10}=\frac{(4.4\times \alpha)^2}{(4.4-4.4\times \alpha)}$

$(\alpha)=0.000011$

$[H^+]=c\times \alpha$

$[H^+]=4.4\times 0.000011=4.8\times 10^{-5}M$

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Thus pH of a 4.4 M $H_3BO_3$ solution is 4.3

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