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charle [14.2K]
3 years ago
15

Calculate the acceleration of a car that slows from 50 m/s to 30 m/s in 10 seconds

Chemistry
1 answer:
olasank [31]3 years ago
5 0
The answer is 2 m/s^2
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Which compound forms a saturated solution at 40 degrees C that contains 46 grams per 100 grams of water?
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Can matter exist at a temperature below absolute zero? Why or why not?
Ivenika [448]

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A temperature below absolute zero: Atoms at negative absolute temperature are the hottest systems in the world. Summary: On the absolute temperature scale, which is used by physicists and is also called the Kelvin scale, it is not possible to go below zero – at least not in the sense of getting colder than zero kelvin.

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3 years ago
Read 2 more answers
At first glance, we expect the Zeff of sodium (Z = 11) to be _____, but in reality, it is closer to 2.667 because _____.
miv72 [106K]

This problem is asking for the theoretical effective nuclear charge for sodium and a reason behind its difference with the actual one. At the end, the answers are 1+ and because the 3s¹ electron has a small probability of being closer to the nucleus.

<h3>Effective nuclear charges</h3>

In chemistry, the effective nuclear charge is defined as the net positive charge valence electrons experience. In addition, one can approximate it with the equation:

Zeff = Z – S

Where Z is the atomic number or number of electrons and S the core electrons.

In such a way, since sodium has 11 electrons and 10 core electrons due to its electron configuration (1s²2s²2p⁶3s¹), one concludes its effective nuclear charge is:

Zeff = 11 - 10 = +1

On the other hand, since the actual effective nuclear charge has a value of about 2.667, one concludes this difference is due to the fact that the 3s¹ electron has a small tendency of being closer to the nucleus and therefore, there is a likelihood that this electron undergoes a greater attraction in comparison to the proposed in the theoretical model.

Learn more about effective nuclear charges: brainly.com/question/6965287

6 0
3 years ago
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