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Ludmilka [50]
4 years ago
6

10. How do substances change after a chemical reaction?

Chemistry
1 answer:
11Alexandr11 [23.1K]4 years ago
3 0

Answer:

I'm pretty sure the answer is B

Explanation:

Because when a chemical reaction takes place the substances atoms rearrange and turn into a different substance.

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An electrochemical cell is constructed such that on one side a pure lead electrode is in contact with a solution containing Pb2+
Ugo [173]

Answer:

-490.7 K

Explanation:

Given:

[Ni^2+]= 0.4 M

[Pb^2+]=0.002 M

∆V= -0.012 V

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VPb= -0.126V

F= 96500 C

R= 8.314 JK-1 mol-1

n= 2

From

T= -nF/R [∆V-(VNi-VPb)/ln [Pb2+]/[Ni2+]]

T= 2(96500)/8.314[ (-0.012) -(-0.250) - (-0.126))/ln[0.002]/[0.4]

T= 23213.856(0.112/(-5.298))

T= -490.7 K

4 0
3 years ago
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Answer:

The formula of acceleration is final velocity-initial velocity÷time taken

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v-u/t

7 0
3 years ago
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Umnica [9.8K]
Yes, because beryllium is less dense and harder than oxygen.
5 0
3 years ago
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What is the energy of light with a wavelength of 697 nm?
USPshnik [31]

Answer:

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Explanation:

8 0
3 years ago
What is the one thing that happens in every chemical change?
Sedbober [7]

Answer:

Explanation:

Chemical reactions involve combining different substances. The chemical reaction produces a new substance with new and different physical and chemical properties. Matter is never destroyed or created in chemical reactions. The particles of one substance are rearranged to form a new substance.

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