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Leto [7]
2 years ago
15

* will mark you brainliest + 18 points *

Chemistry
1 answer:
irakobra [83]2 years ago
5 0

Answer:

A. It has a partial negative charge on oxygen and a partial positive charge on hydrogen.

Explanation:

There is an electronegativity difference between O and H atoms. The electronegativity value of   O and H are 3.5 and 2.1 respectively. So the electronegativity different of the O-H bond is 3.5- 2.1 = 1.4 thus making the O-H bond polar.  O being the more electronegative bond acquires a partial negative charge and H acquires a partial positive charge.  

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the energy to break 1 mol of C-C bonds is 348 kj/mol. what would be the minimum frequency of a single photon that would break a
mr_godi [17]

Answer:

f = 5.25 x 10³⁸ s⁻¹

Explanation:

Energy = 348KJ = 348,000 J

Frequency = ?

Energy and frequency are related by the equation below;

E = hf

where h = Planck's constant =  (6.626 x 10-34 J · s),

Upon making f subject of formular;

f = E / h

substituting the values, we have;

f = 348,000 / 6.626 x 10-34

f = 52,520 x 10 ³⁴ s⁻¹

f = 5.25 x 10³⁸ s⁻¹

4 0
2 years ago
Catherine has some seawater. She wants to separate pure water from the seawater.
Flura [38]

Answer:

the change is evaporation

Explanation:

the water heats up at the surface of the water and evaporates

4 0
2 years ago
Read 2 more answers
Draw a second resonance structure for the following ion (be sure to include the charges and all lone pairs)... + ..N=N=N <---
joja [24]

Answer:

Explanation:

Resonance structure occurs in an organic compound that undergoes resonance effects. This resonance effect is sometimes called the mesomeric effect helps to increases the stability of organic compounds that have alternating single bonds and double bonds.

The second resonance structure diagram for the ion given in the question can be found in the attached diagram below.

8 0
2 years ago
A 1.0 x 102- gram sample is found to be pure alanine, an amino acid found in proteins. How many moles of alanine are in the samp
Romashka-Z-Leto [24]

Answer:

1.123x10⁻⁴ moles of alanine

Explanation:

In order to convert grams of alanine into moles, <em>we need to know its molecular weight</em>:

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  • 12*3 + 7*1 + 14 + 16*2 = 89 g/mol

Then we <u>divide the sample mass by the molecular weight</u>, to do the conversion:

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4 0
1 year ago
The lewis structure of n2h2 shows __________.
Ghella [55]
The Lewis structure of Diimide (N₂H₂) is shown below.

In this molecule two Nitrogen atoms attached to each other through a double bond are further attached to one one Hydrogen atom. Also, each Nitrogen atom carries one non-binding electron pair (Lone Pair) (Highlighted RED).

Result:
          Option-C (<span>each nitrogen has one nonbinding electron pair) is the correct answer.</span>

5 0
2 years ago
Read 2 more answers
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