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Elena-2011 [213]
3 years ago
6

Which of the following is an ionic compound?

Chemistry
2 answers:
Komok [63]3 years ago
6 0
1) Magnesium chloride

gold has a metellic bond

water has a covalent bond
carbon monoxide has a triple covalent bond
mixas84 [53]3 years ago
5 0
<span> Magnesium chloride is the answer to this question


</span>
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Explain why reactivity increases by linking increase in atomic number, number of shells with the shielding of outer most electro
Dmitry_Shevchenko [17]
The higher the atomic number, the more shells an atom has. the electrons in the outer shell are more reactive as they have a weaker attraction to the nucleus as they are furthest away from the nucleus.
5 0
3 years ago
What happens to the electron configuration when you move down a family?
stiv31 [10]

Answer:

The number of energy levels increases as you move down a group as the number of electrons increases.

Explanation:

Each subsequent energy level is further from the nucleus than the last. Therefore, the atomic radius increases as the group and energy levels increase. 2) As you move across a period, atomic radius decreases.

4 0
3 years ago
What amounts of sodium benzoate would be required to prepare 2.5L of 0.35M benzoic buffer solution with a pH of 6.10? Ka of benz
slava [35]

Answer:

Benzoic acid: 1.288g

Sodium benzoate: 124.48g

Explanation:

Benzoic acid, HC7H5O2 is in equilibrium with its conjugate base, C7H5O2⁻ producing a buffer. The pH of the buffer can be determined following H-H equation:

pH = pKa + log [C7H5O2⁻] / [HC7H5O2] (1)

<em>Where pH is desire pH = 6.10 pKa is -log Ka = 4.187 and [] are molar concentrations of the buffer.</em>

As you want to prepare 2.5L of a 0.35M of buffer, moles of buffer are:

2.5L ₓ (0.35mol / L) = 0.875moles of buffer.

And you can write:

0.875 moles = [C7H5O2⁻] + [HC7H5O2] (2)

Replacing (2) in (1)

pH = pKa + log [C7H5O2⁻] / [HC7H5O2]

6.10 = 4.187 + log [C7H5O2⁻] / [HC7H5O2]

1.913 =  log [C7H5O2⁻] / [HC7H5O2]

81.846 = 0.875mol - [HC7H5O2] / [HC7H5O2]

81.846 [HC7H5O2] = 0.875mol - [HC7H5O2]

82.846 [HC7H5O2] = 0.875mol

<h3>[HC7H5O2] = 0.01056 moles</h3>

And moles of the benzoate, [C7H5O2⁻]:

[C7H5O2⁻] = 0.875mol - 0.01056mol =

<h3>[C7H5O2⁻] = 0.8644mol</h3><h3 />

Using molar mass of benzoic acid and sodium benzoate, amount of each compound you must add to prepare 2.5L of the buffer are:

Benzoic acid: 0.01056mol ₓ (122.01g/mol) = 1.288g

Sodium benzoate: 0.8644mol ₓ (144.01g/mol) = 124.482g

3 0
3 years ago
Water intoxication occurs when
jeyben [28]
Water intoxication occurs when:
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4 0
3 years ago
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This is my almost last question plsss help
Morgarella [4.7K]
The third one is correct, not sure abt another one
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