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Keith_Richards [23]
3 years ago
7

PWEAS HELP ME ASAP THIS WAS SUPPOSED TO BE DONE LAST MONTH

Chemistry
2 answers:
liq [111]3 years ago
8 0

Answer:

Scientific models are used to explain and predict the behavior of real objects or systems.

Explanation:

They are used in a variety of scientific disciplines, ranging from physics and chemistry to ecology and the Earth sciences. Drawings help people visualize as well as see the concepts that are trying to be seen.

Dennis_Churaev [7]3 years ago
7 0

Answer:

Scientific modeling, Is the generation of a physical, conceptual, or mathematical representation of a real phenomenon that is difficult to observe directly. Scientific models are used to explain and predict the behavior of real objects or systems and are used in a variety of scientific disciplines, ranging from physics and chemistry to ecology and the Earth sciences. Although modeling is a central component of modern science, scientific models at best are approximations of the objects and systems that they represent—they are not exact replicas. Thus, scientists constantly are working to improve and refine models.

Drawings help people visualize as well as see the concepts that are trying to be seen.

I don't know how to figure out the other things.

Explanation:

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Electron configuration of Phosphorus
Aleks [24]
1s^2 2s^2 2p^6 3s^2 2p^3 or the shortcut way is [Ne] 3s^2 2p^3
3 0
4 years ago
How are valance electrons related to nuclear reactions?
Harrizon [31]

Explanation:

Valence electrons are not related in anyways to nuclear reactions.

They do not take part in nuclear reactions. Only some inner orbital electrons have the tendency of taking part in nuclear reactions.

The valence electrons are the outermost electrons in an atom.

Nuclear reactions takes place in the nucleus of an atom.

Valence electrons are exchanged and shared for chemical reactions to take place in between atoms.

We can conclude that valence electrons have no relevance in nuclear reactions

learn more:

Chemical reactions brainly.com/question/3953793

#learnwithBrainly

6 0
3 years ago
6. The pOH of a solution of NaOH is 11.30. What is the [H+<br><br> ] for this solution?
sashaice [31]

Answer:

The [H⁺] for this soluton is 2*10⁻³ M

Explanation:

pH, short for Hydrogen Potential and pOH, or OH potential, are parameters used to measure the degree of acidity or alkalinity of substances.

The values ​​that compose them vary from 0 to 14 and the pH value can be directly related to that of pOH by means of:

pH + pOH= 14

In this case, pOH=11.30, so

pH + 11.30= 14

Solving:

pH= 14 - 11.30

pH= 2.7

Mathematically the pH is the negative logarithm of the molar concentration of the hydrogen or proton ions (H⁺) or hydronium ions (H₃O):

´pH= - log [H⁺] = -log [H₃O]

Being pH=2.7:

2.7= - log [H⁺]

[H⁺]= 10⁻² ⁷

[H⁺]=1.995*10⁻³ M≅ 2*10⁻³ M

<u><em>The [H⁺] for this soluton is 2*10⁻³ M</em></u>

8 0
4 years ago
Which of Earth's Spheres take up most of the Earth's surface?
sasho [114]
Answer is: hydrosphere
8 0
3 years ago
HELP!!! 30 POINTS!!!
maria [59]

Explanation:

<em><u>periodic \: law</u></em>

<h2><em><u>It's </u></em><em><u>cor</u></em><em><u>rect</u></em></h2>

5 0
3 years ago
Read 2 more answers
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