3 years ago

How can you tell the number of covalent bonds an element can form?

1 answer:

3 0

The number of bonds for a neutral atom is equal to the number of electrons in the full valence shell (2 or 8 electrons) minus the number of valence electrons. This method works because each covalent bond that an atom forms adds another electron to an atoms valence shell without changing its charge.

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A man drove his car through the Nevada desert one day when the temperature was over 100°F. When he started the trip, the gas sta

Slav-nsk [51]

<span>The temperature in the tire increased, causing an increased tire pressure. :D</span>

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3 years ago

10 points

nasty-shy [4]

Answer:

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Explanation:

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3 years ago

A buffer solution is composed of 7.50 mol of acid and 4.75 mol of the conjugate base. If the pKa of the acid is 4.90 , what is t

Mamont248 [21]

Answer:

The correct answer is: pH= 4.70

Explanation:

We use the <em>Henderson-Hasselbach equation</em> in order to calculate the pH of a buffer solution:

$pH= pKa + log \frac{ [conjugate base]}{[acid]}$

Given:

pKa= 4.90

[conjugate base]= 4.75 mol

[acid]= 7.50 mol

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pH = 4.90 + log (4.75 mol/7.50 mol) = 4.90 + (-0.20) = 4.70

7 0

3 years ago

What is the difference between creep and a landslide?

Oksanka [162]

Creep is somthing you might call somone following you. Example, "he was slowly creeping up the stairs behind me". A land slide normally moves faster then that.

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3 years ago

Decide which element probably forms a compound with oxygen that has a chemical formula most and least similar to the chemical fo

aleksley [76]

Answer:

a. magnesium

b. nitrogen

Explanation:

Barium and magnesium are both in 2nd group, so most similar compounds.

Nitrogen - 15 group, so it forms least similar to barium compound.

6 0

3 years ago