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3 years ago

Compared with Earth, the Moon has a surface that is geologically less active. For example

Chemistry

2 answers:

AveGali [126]3 years ago

6 0

The answer is C. The earth does have volcanos, so it isn’t B. Earth has continents so it’s not D

antoniya [11.8K]3 years ago

3 0

Have you tried using quizlet but tbh I would say C

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Which types of electron orbitals will have higher energy than a 4d orbital?

alexdok [17]

Answer:

D) 4f

Explanation:

To determine which electron orbital that will have higher energy than a 4d orbital, we write the electron configuration starting with s-orbital.

2s 2p

3s 3p 3d 3f

4s 4p 4d 4f

5s 5p 5d 5f

6s 6p 6d 6f

7s 7p 7d 7f

In ascending order, 1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 3f, <u>4d</u><em>,</em> 5p, 6s, 4f, 5d, 6p, 7s, 5f, 6d, 7p, 6f, 7d, 7f.

From the electronic configuration formula above, the electron orbitals that have higher energy than a 4d orbital are 5p, 6s, 4f, 5d, 6p, 7s, 5f, 6d, 7p, 6f, 7d, 7f.

Therefore, 4f is the correct answer.

8 0

3 years ago

Why is it necessary for the spins of two electrons that occupy one orbital, to be in the opposite directions? What is that law c

Mars2501 [29]

Answer:

Since electrons cannot have the same set of quantum numbers, a maximum of two can be in the n = 1 level, and a third electron must reside in the higher-energy n = 2 level. If there are two electrons in the n = 1 level, their spins must be in opposite directions.

8 0

3 years ago

A 1.59 mol sample of Kr has a volume of 641 mL. How many moles of Kr are in a 4.41 L sample at the same temperature and pressure

Marina86 [1]

Answer:

The correct answer is 10.939 mol ≅ 10.94 mol

Explanation:

According to Avogadro's gases law, the number of moles of an ideal gas (n) at constant pressure and temperature, is directly proportional to the volume (V).

For the initial gas (1), we have:

n₁= 1.59 mol

V₁= 641 mL= 0.641 L

For the final gas (2), we have:

V₂: 4.41 L

The relation between 1 and 2 is given by:

n₁/V₁ = n₂/V₂

We calculate n₂ as follows:

n₂= (n₁/V₁) x V₂ = (1.59 mol/0.641 L) x 4.41 L = 10.939 mol ≅ 10.94 mol

5 0

2 years ago

Does sound travel best through solids, liquids, or gases?

IRISSAK [1]

In gas the speed of sound is 343.2 meters per second, in liquid the speed of sound is 1,484 meters per second and in solids like steel it travels 5,120 meters per second.

8 0

3 years ago

Read 2 more answers

What is a group of specialized cells called when they work together to perform a specific function?

Nadya [2.5K]

Answer: Tissue

Explanation:

group of organized cells doing specific function is tissue group of organized tissues doing a specific function is an organ a group of organized organs doing a specific function is organ system and a group of organized organ systems doing a specific function would be an organism.

3 0

3 years ago