Chemistry Middle School

1) what causes the magnetic fields on the sun?
2) describe sunspots.
3) describe solar flares.
4) describe solar prominence's.
5) describe coronal holes.

Answers

Answer 1
1) flows of hot plasma in the convection zone 
2) dark spots that appear sometimes because of concentrations of magnetic field flux
3) "a brief eruption of intense high-energy radiation from the sun's surface"
4) gas extended out from the corona but is attached to the sun and can reach great distances
5) large area in cocrona which is less dense and has cooler temperature they occur when "the Sun's magnetic field is open to interplanetary space"
Answer 2
What causes magnetic field on the sun is the nuclear fusion that occurs at the centre of the sun as a result of the inward flow of plasma at the sun.

    2. Sunspots can be defined as the cooler part of the sun which appears dark at the sun's surface.

    3. flares can be defined as those sudden flash of light generated by the sun which contains high energy photons and particles.

    4. Solar prominence is defined as a phenomena that occurs in the sun which are glowing clouds that contain hot ionized gases.

    5. Coronal hole is defined as a region located at the Corona of the sun which is characterized to be less dense and is cooler than its surrounding.

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Related Questions

What evidence do scientists have that Earth has been hit by large objects, like asteroids, in the past? Check all that apply.

Answers

I have attached a screenshot of the question and its options.

Answer:
layer of burned organic matter
change in average global temperature
mass extinctions

Explanation:
Asteroids are external rocks/objects that hit the surface of the earth.
Let's check the options:
1- layer of volcanic ash: This option is rejected as volcanoes are caused as a result of the internal heat and combustion in the layers of the earth. Therefore, volcanoes are independent of external bodies as asteroids.

2- layer of burned organic matter: This option is accepted. When bodies , as asteroids, hit the earth, their clash with the earth's surface usually lead to burns and/or fires leading to layers of burnt organic matter that is found on the surface of the earth and its underlying layers.

3- change in average global temperature: This option is accepted as these bodies usually have different temperatures than that of the earth's climate. Therefore, when they penetrate the earth's atmosphere, they can lead to a change in the global temperature.

4- mass extinctions: This option is accepted as the collision of these bodies with the earth's surface can lead to destruction of creatures/objects which may lead to mass extinctions.

5- earthquake activity: This option is rejected as earthquakes are formed as a result of the motion of plates within the layer's of the earth and not as a result of external bodies.

Hope this helps :) 

What is the source of energy that is released in an exothermic reaction? what absorbs the energy that is released ?

Answers

Hello,

Here are your answers:

The proper answers to your questions are....

1. "Chemical bond energy is converted to kinetic energy"...... which causes it to release energy around its surroundings!

2. "Endothermic reactions"...... Endothermic reactions are the things that absorb the energy!

If you need anymore help feel free to ask me!

Hope this helps!

An electromagnetic wave that has a lower frequency than infrared radiation will have ____ than the infrared radiation. longer wavelength and higher energy longer wavelength and lower energy shorter wavelength and higher energy shorter wavelength and lower energy

Answers

Answer: longer wavelength and lower energy.

Explanation:

1) The wavelength is inversely related to the frequency. So, an electromagnetic wave with lower frequency will have longer wavelength.

This is the formula for electromagnetic waves:

λ = c / ν

where λ is the wavelength, c is the speed of light, and ν is the frequency.

2) Energy is directly related to the frequency.

This is the formula E = hν,

where E is the energy, h is Planck constant, and ν is the frequency.

So, the lower the frequency the lower the energy.

3) Conclusion:
An electromagnetic wave that has a lower frequency than infrared radiation will have longer wavelength and lower energy than the infrared radiation

The answer is longer wavelength and lower energy.

How hot or cold is Mercury

Answers

in the day it's -279 Fahrenheit ( -173 Celsius) and at night it's 801 Fahrenheit ( 427 Celsius)   
Well it all depends on the time of day, where it varies from very cold
(-279F or -173C)at night to very hot (800F or 430C) during the day. This is due to the lack of atmosphere this planet has. And although it is the closest planet to the sun it is only the 2nd hottest planet

What is a type of mineral

Answers

Hello,

Here is your answer:

The proper answer to this question is a type is "sedimentary ".

Here is how:

 For example: Pumice is known as the lighter rock that can be found its a sedimentary rock that is form but deposition on bottom of rivers.

Your answer is sedimentary.

If you need anymore help feel free to ask me!

Hope this helps!

Sunlight is energy that comes from the sun. How is that energy produced?

A. Molecules break down, releasing chemical energy.

B. Uranium atoms split apart, releasing nuclear energy.

C. Hydrogen atoms fuse together into Helium, releasing nuclear energy

D. Molecules are created, releasing chemical energy

I'm pretty sure its C but I want to get a second opinion.

Answers

The answer is C. Correct

Answer:

the answer is C

Explanation:

this is the reaction that happens inside the sun: every four Hydrogen Ions fuse together forming on Helium Ione and the difference in mass between the four Hydrogen Ions and the one Helium Ione is converted into nuclear energy.

A (n) blank is a vent or fissure in the earths surface through which magma and gases are expelled

Answers

Volcano is the answer I believe

Answer:

Volcanoes

Explanation:

The volcanoes are the features on the earth's surface through which the magma comes out along with other gases.

The formation of the volcano is associated with the divergent and the convergent type of plate boundary. Due to this motion and subduction of heavier plates, the plates at greater depth melts and mixes up with the uprising magma. This magma then rises up towards the surface in the over-riding plate, forming volcanoes, from where the magma erupts on the surface forming lava along with the emission of various gases such as carbon dioxide, sulfuric acid, and hydrogen sulfate.

Why are sound recordings needed to preserve sound information

Answers

Original instantaneous sound recordings are in need of special preservation care. Today many of these historical sound recordings are reaching the end of their life span.
I am not sure if you have any answer choices or not, but I will just try to give my own answer. Sound recordings are needed to preserve important info such as historical events. This is because audio is what I like to call "key evidence" or just proof that something happened. An example would be Martin Luther's speech. Someone could say that he said something completely different from what he actually said, and without a recording, we wouldn't actually know. Another reason for sound recordings would be songs and music. Without sound recordings, we wouldn't have songs to listen to all day and night. We would have to go to concerts in order to hear music. I am not sure if any of this helped or not. If it did, please let me know. If it did not, then I am truly sorry, for at this exact moment in time, I can think of no other answers for this question.

A piece of copper at 10 °C is dropped into a glass of water at 35 °C. Which statement is correct?

A. Heat will flow from the copper to the water in the glass until both reach the same temperature.

B. Heat will flow from the water in the glass to the copper until both reach the same temperature.

C. The final temperature of the water in the glass and the copper will be 10 °C.

D. The final temperature of the water in the glass and the copper will be 35 °C.

Answers

I say B. Why? because the heat will keep on moving in molecules until it reaches same temperature

Answer:

The correct answer is option B, that is, heat will flow from the water in the glass to the copper until both reach the same temperature.

Explanation:

Let us see a perfectly thermal insulation system with a glass of water at higher temperatures and a piece of copper at a lower temperature, and when both encounters each other than water will lose some of the heat and that heat will be gained by the copper. The procedure will take place until and unless both attain a similar temperature. After attaining a similar temperature, there will be no change in temperature or heat between the two.  The change in heat is a function of temperature difference.

Carbohydrates are made up of three of the six major molecules found in living things. The general chemical formula for a carbohydrate is CH2O. Which elements combine to make a carbohydrate? Explain why the answer is correct. A. copper and colbat B. chlorine and oxigen C. carbon, helium and oxygen D. carbon, hydrogen and oxygen. Please answer ASAP

Answers

The answer i think is D
D.Carbon,Hydrogen and oxygen.

In carbohydrates, six atoms of carbohydrates, twelve atoms of hydrogen and six atoms of oxygen combine to get a typical formula C6H12O6..
But here you just made it easier so here 1 atom of carbon ,2 atoms of hydrogen and 1 atom of oxygen combine to form a general formula CH2O.....

HOPE IT HELPS YOU '_'

When an electron moves to another orbital farther from the nucleus, does it gain or lose energy?

Answers

I believe that it loses energy, as it is moving away from the main power/control source.

HQ5.49 Use standard enthalpies of formation to calculate the standard enthalpy of reaction for the following reaction: 2 H 2 ​ S(g) + 3 O 2 ​ (g) → 2 H 2 ​ O(l) + 2 SO 2 ​ (g) ΔH ∘ rxn ​

Answers

Answer is: the standard enthalpy of reaction is -1124,2 kJ/mol.
ΔHf(H₂S) = -20.5 kJ/mol
ΔHf(O₂)=0 kJ/mol.
ΔHf(H₂O) = -285.8 kJ/mol.
ΔHf(SO₂) = -296.8 kJ/mol.
ΔHrxn = ∑ΔHf (products of reaction) - ∑ΔHf (reactants).
ΔHrxn - enthalpy change of chemical reaction.
ΔHf - enthalpy of formation of reactants or products.
ΔHrxn = (2 · (-285,8) + 2 · (-296,8)) - (2 · (-20,5)) · kJ/mol.
ΔHrxn = -1124,2 kJ/mol.

how many liters of laughing gas are in 0.98 moles stp

Answers

3H2   +   N2 ===>   2NH3

GIVEN: 44.8 L of H2 at STP.

answer: mols of N2.

By applying ideal gas equation,

[tex]P\times V=n\times R\times T[\tex]

Where, P= pressure of gas

V=volume of gas

R=Gas constant

n=Number of moles of gas

T=Temperature

At STP, each gas has a defined value of pressure, volume and temperature.

P= 1 atm

R=0.0821 L atm mol⁻¹ K⁻¹

T= 0°C or 273 K

Putting all the values in the equation will give:

[tex]1\times V=0.98\times 0.0821\times 273[\tex]

V = 22 L

So the answer is 22 L.

Through which of the following processes is carbon directly transferred between living organisms and the environment?

Answers

Answer:

The answer is carbon cycle.

Explanation:

The carbon cycle is an important process for living organisms. As plants prepare their food through photosynthesis and is also an important source of fossil fuels for human activities.

Therefore carbon atoms are regenerated again and again in the carbon cycle process. This recycling process takes place between livings and nonliving things in the environment and also within the earth biosphere.

Abundance supply of carbon is necessary to carry out the biological processes. The entire carbon cycle is actually made up of sourced and sinks elements.

How many moles of BaSO4 are formed if 0.5 moles of Na2 SO4 react with 60 g of BaCl2? Na2 SO4 + BaCl2 → BaSO4 + 2NaCl

Answers

the balanced equation for the reaction is as follows
Na₂SO₄ + BaCl₂ ----> 2NaCl + BaSO₄ 
stoichiometry of Na₂SO₄ to BaCl₂ is 1:1
first we need to find out which the limiting reactant is
limiting reactant is fully used up in the reaction.
                                                                           
number of Na2So4 moles - 0.5 mol number of BaCl2 moles - 60 g / 208 g/mol = 0.288 mol
since molar ratio is 1:1 equal number of moles of both reactants should react with each other
                                                                         
therefore BaCl2 is the limiting reactant and Na2SO4 is in excess. amount of product formed depends on number of limiting reactant present.
stoichiometry of BaCl₂ to BaSO₄ is 1:1.
                                                                           
therefore number of BaSO4 moles formed - 0.288 mol

Answer: 0.29

Explanation:

[tex]Na_2SO_4+BaCl_2\rightarrow BaSO_4+2NaCl[/tex]

To calculate the moles, we use the equation:

[tex]\text{Number of moles}=\frac{\text{Given mass}}{\textMolar mass}}[/tex]

Putting values in above equation, we get:

[tex]\text{Moles of}BaCl_2}=\frac{60g}{208g/mol}=0.29mol[/tex]

Moles of [tex]Na_2SO_4[/tex] = 0.5 moles

According to stochiometry, 1 mole of [tex]BaCl_2[/tex] reacts with 1 mole of [tex]Na_2SO_4[/tex]

Thus 0.29 moles of [tex]BaCl_2[/tex] will react with 0.29 moles of [tex]Na_2SO_4[/tex]

Thus [tex]BaCl_2[/tex] is the limiting reagent as it limits the formation of products and [tex]Na_2SO_4[/tex] is the excess reagent.

1 mole of [tex]BaCl_2[/tex] produces = 1 mole of [tex]BaSO_4[/tex]

0.29 moles of [tex]BaCl_2[/tex] will produce= 0.29 moles of [tex]BaSO_4[/tex]

How will the arrangement of salt particles most likely change?

Answers

Answer:

Salt particles will diffuse and towards where it is less that is left !!

so your answer is A !! left through diffusion !!

Explanation:

An air mass of volume 6.5 x 10 to the fifth L starts at sea level, where the pressure is 775 mm HG. It rises up a mountain where the pressure is 622 mm HG. Assuming no change in temperature, what is the volume of the air mass?

Answers

From Boyle's law the volume of a fixed mass of a gas is inversely proportional to temperature at constant absolute temperature.
Thus, Vα1/P
    = V = k/P where k is a constant
P1V1=P2V2
Therefore; V2 = P1V1/P2
                       = ( 6.0 ×10^-5 × 775) /622
                       = 7.476 × 10^-5 L
Hence, the new volume of the air mass is 7.476 × 10^-5 L

Earth's path around the sun is _____.


a) eliptical
b) circular
c)random
d) triangular

Answers

The answer is A

Hope this helps

~ Jordan ~

As part of a science experiment, Jose did a test for starch on a slice of apple and a slice of potato. The yellow-orange iodine solution stayed the same color when it was put on the apple, but it became black on the potato. Why did the iodine solution change color on the potato? A. The iodine evaporated into a gas. B. The iodine mixed with the colors of the potato so it looked black. C. The iodine burned the potato and turned it to ash. D. The iodine reacted with the potato to form a new substance.

Answers

D. I know this because i did the project 3 weeks ago.

Answer:

The iodine reacted with the potato to form a new substance.

Explanation:

HELP FAST PLZ!!!!
which statement describes the role of decomposers in the carbon cycle?
A they release the carbon that remains in the bodies of dead organisms.
B they prevent carbon from escaping into the atmosphere
C they absorb carbon dioxide in the atmosphere
D they change carbon dioxide into a form that organisms can use.

Answers

b is the correct answer i hope this helps good luck on test.

Answer:

Your answer would be A.

Explanation:

I took a quiz with the same exact question

Both algae and amoeba are in the domain Eukarya. Which of the following characteristics do they most likely share?

They both belong to the plant kingdom.

They both have cells with no nucleus.

They both have cells with membrane-bound organelles.

They both belong to the animal kingdom.

Answers

Answer: They both have cells with membrane- bound organelles.

Explanation:

The domain eukarya includes the eukaryotic organisms, which range in diversity from single celled to multicellular. These organisms have cells that have membrane bound organelles, nucleus is present in them. These organisms range from simple to complex life cycles.

Hence, both algae and amoeba which belong to domain eukarya have membrane bound organelles in their cells.

Answer:

C, They both have cells with membrane-bound organelles.

Explanation:

I did the module exam

HEELLP PLEEASEE I GIVE 30 POINTS + BRAINLIEST!!!!!! HELPP PLEEAASEE

Answers

You should be able to get the freezing water question. It is very important to know the difference between a chemical and a physical reaction. I'm going to ask that you try this one yourself.

Are you male or female? It won't help for this question. It would have if I'd known before hand. It will help me to answer you later on. Do you cook is the point? If you do, you should know something about what happens when you bake a cake. But you may not be able to guess, even if you do cook. How about dough rising (for bread or buns?) Is that chemical or physical? This time I'll tell you. It's chemical. 
To make a cake you need to blend a whole bunch of things together, sugar flour, eggs (most of the time). What happens? Do the look the same when you've finished baking?

That's right. Something new results especially to the egg. Chemical.

Burning a log is another common example. What are you left with after you've burned a log? Can you get the log back. Is there anything you can do to get the log back? If it was physical, you could. So what's left? And what do you see when you burn a log? Do you live where it snows? If you do, you must have seen a log burn. 

What is a physical property of water?
A) liquid at room temperature
B) not flammable
C) pH of 7
D) reacts with sodium

Answers

A is the only physical property.  A physical property is one that does not involve another chemical or element.
a) liquid at room temperature

How many milliliters are in 22 mm3?

Answers

fuf9chlbcoc cpchchlccpj hl hl hlxypcoyohcohchho. lh ohcgl vk .

Which equation shows conservation of mass? A.  H2O → H2 + O2 B.  PCl5 → PCl3 + Cl2 C.  Na + Cl2 → NaCl D.  Al + Br2 → AlBr3

Answers

Answer:

B. PCl₅ → PCl₃ + Cl₂.

Explanation:

The conservation of mass is a phenomena that is applicable and found in chemical reaction but only balance chemical reactions.Balanced chemical reaction means that: The number of atoms of the reactants = the number of atoms in the products.In balanced chemical reaction; the atoms that enter and participate in the reaction will result from it and maintain the mass of each atom.The first choice (A) is wrong that it is unbalanced chemical reaction,

H₂O → H₂ + O₂, the oxygen has 1 atom in the reactants side while has 2 atoms in the products side.

to be balanced and apply conservation of the mass it should be: H₂O → H₂ + 1/2O₂.

The second choice (B) is the right answer: PCl₅ → PCl₃ + Cl₂.

The number of atoms of P (1 atom) and Cl (5 atoms) are the same in both sides of reactants and products.

The third choice (C) is wrong that it is unbalanced chemical reaction,

Na + Cl₂ → NaCl, the Cl has 2 atoms in the in the reactants side while has 1 atom in the products side.

to be balanced and apply conservation of the mass it should be: Na + 1/2Cl₂ → NaCl.

The fourth choice (D) is wrong that it is unbalanced chemical reaction,

Al + Br₂ → AlBr₃, the Br has 2 atoms in the in the reactants side while has 3 atoms in the products side.

to be balanced and apply conservation of the mass it should be: 2Al + 3Br₂ → 2AlBr₃.

Final answer:

The law of conservation of mass states that matter cannot be created nor destroyed. In chemical equations, this is demonstrated by having an equal number of atoms for each element on both sides of the equation. Thus, the balanced chemical equation PCl5 → PCl3 + Cl2 shows the conservation of mass.

Explanation:

The principle of the conservation of mass is demonstrated by a balanced chemical equation, which has an equal number of each element's atoms on both sides. In the options given, the correct equation demonstrating mass conservation is PCl5 → PCl3 + Cl2. This equation rightly represents the law of conservation of mass as the number of atoms for each element is equal on both the reactant and the product side.

Out of the other options, H2O → H2 + O2 is incorrect because there is only 1 oxygen atom in the reactant side (in H2O) but 2 in the product side (in O2). Both Na + Cl2 → NaCl and Al + Br2 → AlBr3 do not conserve mass, as they don't have equal number of atoms for each element on both sides of the equation.

Remember, to show conservation of mass in a chemical reaction, the equation must be balanced, meaning it must contain equal atoms of each element on the reactant side and the product side, highlighting the fact that in any process, matter is neither created nor destroyed.

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Will mark as Brainliest.

Which of the following is an exothermic reaction?

melting ice

dissolving ammonium nitrate in water to cool the water

dissolving sugar in water

condensation

Answers

It is condensation, it is the answer.

If the wavelength of one wave is 0.25 or ¼ meters, how many waves will be formed in one meter?

Answers

4 waves will be formed.

Helpp pleaseeeeeeeee

Answers

5 pm because she has to go 30 miles and she is only going -10 miles oer hour, which means in three hours she will het there

Answer:

The Sarah will arrive at 5.00 P.M..

Explanation:

Distance covered by Sarah = D = 30 miles

Time taken by Sarah to travel 30 miles = T

Speed by which Sarah cycling = S = 10 mile/hr

[tex]Speed=\frac{Distance}{Time}[/tex]

[tex]Time = \frac{Distance}{Speed}[/tex]

[tex]T=\frac{30 mile}{10 mile/hr}=3 hr[/tex]

Sarah will reach her grandmother's house in 3 hours.

If she leaves the home at 2.00 P.M. ,then she will reach at her grandmother's house by 5.00 P.M..

The equation Mg(s) + 2HCl(aq) → MgCl2(aq) + H2(g) is an example of which type of reaction?

Answers

single-replacement reaction. hope it helped <3

Answer : This is an example of single-displacement reaction.

Explanation :

Single-displacement reaction : It is a type of reaction in which the more reactive metal displaces the least reactive metal from its solution.

It is represented as :

[tex]A+BC\rightarrow AC+B[/tex]

where A is the most reactive metal and BC is the compound in which the B is the least reactive metal which is displaced by the most reactive metal A.

The given balanced reaction is,

[tex]Mg(s)+2HCl(aq)\rightarrow MgCl_2(aq)+H_2(g)[/tex]

This reaction is an example of single-displacement reaction in which the magnesium metal displaces the hydrogen metal from its solution to give magnesium chloride and hydrogen gas as a product.

Hence, the given reaction is an example of single-displacement reaction.

The reactant Zn is an

element
an ionic compound
a molecule
an oxide.

Answers

Zn is an element. It can be found in the periodic table of elements.
This is just an element.  Since there is no chemical or charge with the Zn it is just an element
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