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Lady bird [3.3K]
3 years ago
7

QUICK (lots of points) How many lone pairs are present in Xylene?!

Chemistry
2 answers:
Snezhnost [94]3 years ago
7 0

i dont think their are a exact number

Goryan [66]3 years ago
5 0

Oxygen typically has 4 non-bonding electrons (or 2 lone pairs). The full valence shell for oxygen is 8 and the number of electrons in bonds is 4. Therefore, the difference is 4. Table of the typical numbers of bonds and non-bonding electrons.


.....Is this the answer your looking for? kinda confused....If not please delete my answer so somebody can give you what you want! :)

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What is the pH of 0.10 M NaF(aq). The Ka of HF is 6.8 x 10-4
dsp73

<u>Given information:</u>

Concentration of NaF = 0.10 M

Ka of HF = 6.8*10⁻⁴

<u>To determine:</u>

pH of 0.1 M NaF

<u>Explanation:</u>

NaF (aq) ↔ Na+ (aq) + F-(aq)

[Na+] = [F-] = 0.10 M

F- will then react with water in the solution as follows:

F- + H2O ↔ HF + OH-

Kb = [OH-][HF]/[F-]

Kw/Ka = [OH-][HF]/[F-]

At equilibrium: [OH-]=[HF] = x and [F-] = 0.1 - x

10⁻¹⁴/6.8*10⁻⁴ = x²/0.1-x

x = [OH-] = 1.21*10⁻⁶ M

pOH = -log[OH-] = -log[1.21*10⁻⁶] = 5.92

pH = 14 - pOH = 14-5.92 = 8.08

Ans: (b)

pH of 0.10 M NaF is 8.08

6 0
3 years ago
What kind of charge does a neutron have?
Nat2105 [25]
Neutrons actually don't carry an electrical charge, which is why they are called neutrons because they are "Neutral".


6 0
3 years ago
Compound is pure substances of two or more lenient combined by heat
solniwko [45]
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3 years ago
Be sure to answer all parts. Butane gas is compressed and used as a liquid fuel in disposable cigarette lighters and lightweight
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Answer:

The correct answer will be "4.60 g".

Explanation:

The given values are:

Volume of Butane = 7.96 mL

Density = 0.579 g/mL

As we know,

⇒  Mass \ of \ Butane = Density\times Volume

On putting the estimated values, we get

⇒                              =0.579\times 7.96

⇒                              =4.60 \ g

6 0
3 years ago
Why does the moon and the sun have the same mass.
svp [43]

Why does the moon and the sun have the same mass?

Answer: The difference is that, on the moon, you are much lighter than on the Earth, but you still have the same mass

3 0
2 years ago
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