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Kryger [21]
3 years ago
9

The noble gas electron configuration for Ca2+ ion is identical with:______.

Chemistry
1 answer:
algol [13]3 years ago
4 0

Answer:

D. Ar.

Explanation:

The<em> </em><em>electron configuration</em><em> of the atom reflects how the electrons are distributed among the various atomic orbitals</em>. Just as for neutral atoms, we use the Pauli exclusion principle and Hund’s rule in writing the ground-state electron configurations of cations and anions.

<u>Ions formed from atoms of most representative elements have the noble-gas outer electron configuration of ns²np⁶.</u> In the formation of a cation from the atom of a representative element, one or more electrons are removed from the highest occupied n shell. The electron configuration of calcium and its ion is as follows:

Ca: [Ar]4s²                           Ca²⁺ : [Ar]

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Jlenok [28]

Answer:

See attached

Explanation:

3 0
3 years ago
A solution of acetic acid has a pH of 3.45. What is the concentration of acetic acid in this solution? Ka for CH3COOH is 1.8×10-
Serjik [45]

Answer:

0.007 M

Explanation:

pH is defined as the negative logarithm of the concentration of hydrogen ions.

Thus,  

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The expression of the pH of the calculation of weak acid is:-

pH=-log(\sqrt{k_a\times C})

Where, C is the concentration = ?

Given, pH = 3.45

So, for CH_3COOH, K_a=1.8\times 10^{-5}

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3 years ago
Which unit is not a measurement of volume?<br><br> cm<br> L<br> ml<br> cm3
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Which unit is not a measurement of volume?

<u>cm </u>

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8 0
4 years ago
Read 2 more answers
Consider the balanced chemical reaction when phosphorus and iodine react to produce phosphorus triodide: 2 P(s) + 3 I2(g) → 2 PI
melamori03 [73]

Answer:

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Explanation:

This is the reaction:

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As we have produced 0.147 moles let's determine the percent yield.

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5 0
3 years ago
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8 0
3 years ago
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