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Eddi Din [679]
3 years ago
6

What negative impact did chemistry have on society through the production and use of chlorofluorocarbons (CFCs)?

Chemistry
2 answers:
andrey2020 [161]3 years ago
6 0
<span>The answer to your question is the 3rd option </span>
DENIUS [597]3 years ago
3 0
Da answer is C. hope it helps sir

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What is the radius of a hydrogen atom whose electron is bound by 0.544 ev? express your answer with the appropriate units?
insens350 [35]
First, we need to calculate the principal quantum number n for this electron, using the equation:
E = (-13.60 eV) / (n x n)
where E is the energy that is used to bound the electron (here, E = - 0.544 eV).
- 0.544 eV = (-13.60 eV) / (n x n)
n x n = (- 13.60 eV) / (- 0.544 eV)
n x n = 25
n = 5

The orbital radius that is equal to the radius of a hydrogen atom is calculated using the equation:
r = 0.053 nm x n x n
r = 0.053 nm x 5 x 5
r = 0.053 nm x 25
r = 1.325 nm
6 0
3 years ago
The steps in an investigation between two negatively charged objects are listed below.
dezoksy [38]

Answer:

Explanation:

step 2

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3 years ago
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The change in speed that could occur in 4 seconds in an object with an acceleration of 6 m/s/s.
bazaltina [42]

Answer:

24m/s

Explanation:

a=change of v/change of t

6m/s^2=v/4s

multiply both sides by 4s

v=24m/s

4 0
3 years ago
I will mark brainliest<br> What are dams? How do they help conserve water?
Gre4nikov [31]

Answer: what are dams?

A dam is a barrier that stops or restricts the flow of water or underground streams. Reservoirs created by dams not only suppress floods but also provide water for activities such as irrigation.

how does it conserve water?

well there could be many ways it can conserve water but I will tell you the most important.

When the water level increases they open gates in order to send out water. These dams allow us to store and not to drain water into oceans soon. A DAM is a barrier constructed to hold back water and raise its level

Explanation:

I hope this helps plz click the heart and mark me braines!

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7 0
3 years ago
Which element has the highest ionization energy<br> A. Calcium<br> B. Bromine<br> C. Astatine
inessss [21]

Answer:

bromine

Explanation:

4 0
3 years ago
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