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Hitman42 [59]
3 years ago
12

How many ions does each of these symbols have, I need answer and my science teacher doesn’t tell us or explain it to us

Chemistry
1 answer:
seropon [69]3 years ago
6 0

Answer: about 14

Explanation:

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An unknown triprotic acid (H3A) is titrated with NaOH. After the titration Ka1 is determined to be 0.0013 and Ka2 is determined
e-lub [12.9K]

Answer:

6.68 X 10^-11

Explanation:

From the second Ka, you can calculate pKa = -log (Ka2) = 6.187

The pH at the second equivalence point (8.181) will be the average of pKa2  and pKa3. So,

8.181 = (6.187 + pKa3) / 2

Solving gives pKa3 = 10.175, and Ka3 = 10^-pKa3 = 6.68 X 10^-11

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3 years ago
What characteristics do the elements in a group share? In a period, share?
Katyanochek1 [597]

Answer:

The elements in same period have same principle quantum number or energy shell.

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Explanation:

Inn group:

The elements in same group i.e present in vertical column shows similar chemical properties.

The elements in same group having same number of valance electrons. while in chemical reaction bonds are break and formed and valance electrons are involved. That's why elements in same group having same number of valance electrons and shows similar chemical properties.

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While as we move from left to right the number of valance electron increase by one in every element. But the electron is added in same shell which means that their physical and chemical properties are different but principal quantum number is same.

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3 years ago
Write the electronic configuration of the Na +, Mg2 +, Ca2 + and Rb + ions.
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combustion is a chemical change

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Theories are built upon testing many ________?<br>A).laws.<br>B).Hypothese.<br>C).Facts.​
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B. Hypothese

Explanation:

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3 years ago
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