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2 years ago

12. Draw the lewis structure for the element to help you answer the question *

Chemistry

1 answer:

lorasvet [3.4K]2 years ago

5 0

Answer:hope it helps

Explanation:

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Element whose atoms have completed their outer energy level are the ____

umka21 [38]

Answer:

Noble gases

Explanation:

nobles gases have their outer energy level complete

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2 years ago

Which of these is most likely to create large areas of land subsidence?

Mumz [18]

I think it is Global warming

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2 years ago

3. Challenge: Select Distance again from the Conversion menu. Use the conversion factors on the tiles to

Gnom [1K]

Answer: 1 liter

Explanation:

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2 years ago

When adding or subtracting deelmals, how many digits should the answer contain?

Alexus [3.1K]

Answer:

Depends, but in most cases, 2.

It's best to use as many digits as possible to keep it accurate.

Explanation:

This varies between teachers, as most schools go with 2 decimal places.

This is something that depends in your situation.

You technically want as many decimals as possible to keep it as accurate, but most people stick with 2.

I personally do 3, and commonly do 5 sometimes.

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2 years ago

CdF2(s)⇄Cd2+(aq)+2F−(aq)A saturated aqueous solution of CdF2 is prepared. The equilibrium in the solution is represented above.

kupik [55]

Answer:

The correct answer is option a.

Explanation:

$CdF_2(s)\rightleftharpoons Cd^{2+}(aq)+2F^-(aq)$

Equilibrium concentration cadmium ions = $[Cd^{2+}]=0.0585 M$

Equilibrium concentration fluoride ions = $[F^{-}]=0.117 M$

Molar solubility is the maximum concentration of salt present in water in ionic form beyond that no more salt will exist in its ionic form and will settle down in bottom of the solution.

The molar solubility of the solid cadmium fluoride = 0.0585 M

$CdF_2(s)\rightleftharpoons Cd^{2+}(aq)+2F^-(aq)$ ..[1]

$NaF(s)\rightleftharpoons Na^{+}(aq)+F^-(aq)$

Due to addition of sodium fluoride will increase concentration of fluoride in the solution.And due to common ion effect the equilibrium will shift in backward direction in [1], that is precipitation of more cadmium fluoride.

Hence, decrease in solubility will be observed.

8 0

2 years ago