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chubhunter [2.5K]
3 years ago
7

Select the correct answer.

Chemistry
1 answer:
lesya [120]3 years ago
4 0
It is 8790.9 hope this helps
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The polar isopropanol molecules are attracted to
Sergio [31]

When water (H2O) is added to liquid isopropanol to form a solution, then polar isopropanol molecules are attracted to polar water molecules at the surface of the water. It forms a solution of rubbing alcohol.

<h3>Isopropanol and water in the solution</h3>

Isopropyl alcohol is water-soluble and forms hydrogen bonds with molecules of water (H2O).

When H2O is added to liquid isopropanol to form a solution, H2O spread in a uniform way in the solution.

These isopropanol molecules can surround H2O molecules, which are carried into the solution.

Learn more about isopropyl alcohol here:

brainly.com/question/799124

3 0
3 years ago
The electron configuration for chromium is 1s22s22p63s23p63d54s1 instead of 1s22s22p63s23p63d44s1. The configuration is an excep
g100num [7]

<u>Answer:</u> The correct answer is Aufbau principle.

<u>Explanation:</u>

Pauli exclusion principle states that no two electrons with in an atom can have all four quantum numbers same.

Heisenberg principle states that it is impossible to measure with high precision the value of momentum and position of an electron.

Aufbau principle states that the electron will occupy the lowest energy level first before occupying the higher energy levels.

Schrodinger equation is used to find the allowed energy levels of quantum mechanical systems of an electron.

Chromium is the 24th element of the periodic table and its electronic configuration must be written as: 1s^22s^22p^63s^23p^63d^44s^2

But the actual configuration for this is 1s^22s^22p^63s^23p^63d^54s^1

This configuration is an exception to Aufbau's principle because half filled sub-levels is more stable than other configurations.

The actual configuration has half filled 'd' and 's' sub-levels but the expected configuration had fully filled 's' orbital and partially filled 'd' orbital.

Thus, actual configuration is accepted for chromium atom.

Hence, the correct answer is Aufbau's principle.

7 0
3 years ago
The element with the smallest iconic radius in the alkaline earth metals is
olya-2409 [2.1K]

Answer:

Metal.

Explanation:

Metal has the smallest iconic radius in the alkaline earth metal.

8 0
4 years ago
What couse the rusting in metals?​
suter [353]

Oxide or too much Oxygen and Moisture

7 0
3 years ago
Read 2 more answers
I need help with chem. How do I know if this is balanced ?
ivanzaharov [21]

https://www.khanacademy.org/science/chemistry/chemical-reactions-stoichiome/balancing-chemical-equations/v/balancing-chemical-equations-introduction

this will help trust me

have a good day

6 0
3 years ago
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