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kherson [118]
3 years ago
10

Please help asappp‍♀️!

Chemistry
2 answers:
solniwko [45]3 years ago
6 0
Can you show me the passage?
Vaselesa [24]3 years ago
4 0
Although I don’t have a passage to fall back on completely, I can help out.

The answer to question 2 I believe Is D.
And I believe the answer to question 3 is A.

Hope this helps! :))
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The reaction is exothermic.

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If an isotope of uranium, uranium-235, has 92 protons, how many protons does the isotope uranium-28 have?
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4 0
3 years ago
0.023 M solution of perchloric acid
kogti [31]
The original question is to find the pH and the pOH of 0.023 M of perchloric acid.

Answer:
pH = 1.638
pOH = 12.362

Explanation:
1- getting the pH:
pH can be calculated using the following rule:
pH = -log[H+]
Since the given solution is an acid, this means that [H+] is the same as the concentration of the solution.
This means that:
[H+] = 0.023
Substitute in the above equation to get the pH as follows:
pH = -log[0.023]
pH = 1.638

2- getting the pOH:
We know that:
pH + pOH = 14
We have calculated that pH = 1.638.
Substitute in the above equation to get the pOH as follows:
pOH + 1.638 = 14
pOH = 14 - 1.638
pOH = 12.362

Hope this helps :)
5 0
3 years ago
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