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ValentinkaMS [17]

3 years ago

13

What will most likely cause a sudden wind to start blowing?

2 answers:

nydimaria [60]3 years ago

7 0

Answer:

wind is just high and low pressure of air, when a high pressure comes and crashes into a low pressure air pocket than it can form a wind storm.

Explanation:

Vesnalui [34]3 years ago

4 0

The Uneven heating of the Earth's surface. Earth's rotation and unequal heating of the Earth's surface. air pressure towards regions of lower air pressure. ... air moving from areas of high pressure to areas of low pressure.

This is what will most likely cause a sudden wind to start blowing.

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Maddie is testing different kinds of soil to see which one is the best for growing plants. She fills one cup with a mixture of s

Oliga [24]

Answer:

Observation is a good thing on Maddie’s experiment because it helps you understand better.The variable is the radish seeds.

Explanation:

Hope this helps!

8 0

4 years ago

Help!!!!!!!!!<br> I'm using plato

Mekhanik [1.2K]

Answer:

- Two black balls: they represent a diatomic molecule composed by two atoms of the same element.

- One black ball and two black balls: they represent a compound formed by two different elements.

- One gray ball and two black balls: they represent a compound formed by two different elements.

- Two black-dotted balls: they represent a diatomic molecule composed by two atoms of the same element.

Explanation:

Hey there!

In this case, according to the given information, we can firstly bear to mind the fact that each ball color represents a different element, for that reason we can tell the following:

- Two black balls: they represent a diatomic molecule composed by two atoms of the same element.

- One black ball and two black balls: they represent a compound formed by two different elements.

- One gray ball and two black balls: they represent a compound formed by two different elements.

- Two black-dotted balls: they represent a diatomic molecule composed by two atoms of the same element.

Regards!

8 0

3 years ago

two kilogram of nasialo4 zeolites are used in a water filter to remove calcium. after complete ion exchange the zeolite is remov

defon

After ion exchange with zeolite in water filter to remove calcium by substitute natrium ion with calcium ion, the weight of zeolite become 1.9578 kg.

ion exchange calculation can be done by using basic stoichiometry if we know how the reaction of the ion exchange. In this case where zeolite with natrium ion will be exchanged with calcium. The reaction of exchange will be like this:

$2NaSiAlO_{4} + Ca^{2+}$ ⇒ $Ca(SiAlO_{4}) _{2} + 2Na^{+}$

Calculate the molecule weight of both zeolite
Atomic weight data:
Na = 23 gram/mole

Si = 28 gram/mole

Al = 27 gram/mole

O = 16 gram/mole

Ca = 40 gram/mole

Molecule weight

$NaSiAlO_{4}$ = 142 gram/mole

$Ca(SiAlO_{4}) _{2}$ = 278 gram/mole

Calculate mole from 2kg of zeolite with natrium :

2000 gram/ 142 = 14.0845 mole

Based on the stoichiometry, we got the mole of zeolite with calcium:

14.0845 mole x 1/2 = 7.0423 mole

Weight of zeolite after the ion exchanged with calcium:

7.0423 mole x 278 = 1957.8 gram = 1.9578 kg

Learn more about ion exchange here: brainly.com/question/28203551

#SPJ4

6 0

1 year ago

Example of POTENTIAL ENERGY: <br><br> and <br><br> Example of KINETIC ENERGY:

Degger [83]

Potential : a yoyo before it’s been released
Kinetic : skateboarding

4 0

3 years ago

Read 2 more answers

Two electrons are found in the same atom. One has the quantum number set (3, 2, 0, +?), and the other has the quantum number set

Vilka [71]

D. Same energy level but different sublevel.

<h3>Explanation</h3>

There are four quantum numbers [1]:

<em>n</em><em>, </em>the principal quantum number,
<em>l</em>, the orbital angular momentum quantum number,
<em> $m_l$ </em>, the magnetic quantum number, and
<em> $m_s$ </em>, the electron spin quantum number.

As their names might suggest:

<em>n </em>determines the main energy level of an electron.
<em>l</em> determines the type of sublevel of an electron.
Each sublevel might contain more than one orbital. <em> $m_l$ </em> gives the orbital of an electron.
Each orbital contains up to two electrons. <em> $m_s$ </em> tells two electrons in the same orbital apart.<em> </em>

The two electrons in question come from the same atom. The question suggests that they have the same <em>n</em>, <em> $m_l$ </em>, and <em> $m_s$ </em>. As a result, both electrons are in main energy level <em>n</em> = 3. They share the same spin.

However, the two electrons differ in their value of <em>l</em>.

<em>l </em>= 2 for the first electron. It belongs to a <em>d</em> sublevel.
<em>l </em>= 1 for the second electron. It belongs to a <em>p</em> sublevel.

<h3>Reference</h3>

[1] Kamenko, Anastasiya, et. al, "Quantum Numbers", Physical & Theoretical Chemistry, Chemistry Libretexts, 24 Mar 2017.

7 0

4 years ago