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NeX [460]
3 years ago
9

Please help i am losing motivation and very depressed please look at photo and answer.

Chemistry
1 answer:
iris [78.8K]3 years ago
5 0

Answer:

Solid turns to liquid.

Explanation:

When you freeze water, it turns into ice. When melted it's still water. No chemical changes were made to the piece of ice melted. The only change was ice (solid) to water (liquid)

Conservation of Matter - Matter can change forms through physical and chemical changes, but no matter what, matter is conserved. The same amount of matter exists before and after the change.

<em><u>Hope this helps! Please mark brainliest!</u></em>

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Of the elements calcium, Ca, beryllium, Be, barium, Ba, and strontium, Sr, which has the largest atomic radius? Explain your ans
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The largest atomic radius has Ba,because they are all metals of 2nd group,but as you know when you go down upright in the periodic table the metallic features getting stronger but also orbital layers increasing,and you can say more layers larger atomic radius.Hope I helped,sorry for English
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Explanation:

I makes sense to pick option 2

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Calculate the solubility at 25°c of cubr in pure water and in a 0.0030m cobr2 solution. you'll find ksp data in the aleks data t
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Answer:

the solubility at 25°c of cubr in pure water = 0.011 g/L

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Explanation:

Step 1: Data given

Ksp of CuBr = 6.27 × 10^-9

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Step 2: Calculate the solubility at 25°c of cubr in pure water

Ksp = [Cu+][Br-]

The initial concentration

[Cu+] = 0M

[Br-] = 0M

The concentration at the equilibrium

[Cu+] = X M

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Step 3: Calculate the solubility at 25°c of cubr  in a 0.0030m cobr2 solution.

The balanced equation:

CoBr2(aq) → Co^2+(aq) + 2 Br⁻(aq)

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The initial concentration

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6.27 *10^-9 = 0.0060 X + X²

X = 1.0 * 10^-6 mol/L

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