Chemistry Middle School

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Answer 1

Answer:

False

Explanation:

Tearing a paper is a physical change because when the paper is torn only the appearance of paper is changed.

Related Questions

will give brainliest

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Answer:

800 calories

Explanation:

It takes 80 calories to melt 1 gram of ice. If 1 g of ice (at 0 degrees Celsius) is given 80 calories. Freezing water at 0 degrees Celsius is vis versa.

Answer:

800 calories

Explanation:

hope this helps :)))

Which answer one
(A Carbon dioxide Carbon dioxide enters their leaves from the atmosphere.)
( B Carbon dioxide enters their leaves from the atmosphere.)
(C Carbon dioxide enters their roots from the soil.)
(D Carbon dioxide is produced in a chemical reaction inside their mitochondria.)

Answers

Answer:

B) Carbon dioxide enters their leaves from the atmosphere.

Explanation:

Answer: I think the answer is A

Explanation:

How many elements in this compound: HClO
1
2
3
4

Answers

There are three elements hydrogen, chlorine, and oxygen

Hypochlorous acid has a chemical formula of HClO. It has one hydrogen (H) atom, one chlorine (Cl) atom and one oxygen (O) atom. so 3

1.Write the chemical formula for the ionic compound formed by each pair of ions.

a.Na+and Br−

b.Mg2+and Br−

c.Mg2+and S2−

d.K+and Cl−

e.Mg2+and Cl−

f.Li+and N3−

2. Noel created two binary ionic compounds using sameCation and two different anions -MgO and MgCl2Now ,Can you create two binary ionic compounds withTwo different cations and same anion

PLEASE HELP FAST !!

Answers

Answer: a

Explanation:

Is this right?
...........

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Yes u are very right GOODLUCK!

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Asapp

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Answer:

Agree

Hope this helps

Organisms on earth are
what-based life forms
oxygen
hydrogen
carbon

Answers

I think that the answer is oxygen, oxygen plays a huge role in the evolution of organisms.
Oxygen. You need it to survive.

The chemical symbol for sulfuric acid is H2SO4. How many atoms are contained in each molecule of sulfuric acid?
a.
3
c.
6
b.
5
d.
7

Answers

C.6

Look at it as H2 So4
H2 two atoms of that element
So4 four atoms of that element
And then up and you get six

You know the drill by now-

Answers

Answer:

distance   time

Explanation:

Answer:

First box : Distance

Second Box: Time

Explanation:

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Agree. This is true because you’re technically destroying atoms

Answer:

disagree

lavoisers law of masses

Pls help this is due in 5 mins!!!! Brainlest to the best answer and 20 points

Every Cell in the body requires oxygen for respiration so that sufficient energy can be produced. Carbon dioxide, a waste product, is also produced and needs to be removed.
Therefore, the levels of both gases must be regulated. How does this explain the changes in our pulse rates

Answers

Answer:

Your pulse will go higher or lower, This explains the changes in our pulse rate because, our heart is having to work twice as hard. Our heart is having to work twice as hard because while its producing oxygen its also getting rid of the Carbon Dioxide. while you are jogging or doing any physical activity than your body requires alot of energy and produce a lot of carbon dioxide which causes the heart to beat fast as to remove co2 and take o2 from the blood leading to higher rate of pulse. on the secon hand if you are sedentary , consumption and production of o2 and co2 respectively will decrease leading to the slow beating of heart leading to low pulse

Explanation:

1. Explain what the process of respiration is.
2. List at least 6 of the organs or structures which exist in the
respiratory system.
3. When we exercise, why do we breathe harder?

Answers

Answer:

The process of respiration is breathing

Explanation:

1. The process of respiration is inhaling oxygen and exhaling carbon dioxide.

2. Lungs, Bronchus, Trachea, Larynx, Pharynx, Bronchiole, and Pulmonary Alveolus

3. Our bodies use more oxygen which produces more carbon dioxide. To fulfill the body's needs, your breathing has to increase from about 15 times a minute to about 40–60 times a minute.

It's the drawing axis, this is due in some hours so pls hurry.

Answers

Answer:

What are we supposed to do

Explanation:

Answer:

Ummm... wdym... comment

                                    ↓

Explanation:

Ulay the tiles to the correct boxes to complete the pairs. Not all tiles will be used
The chemical formula for artificial sweetener is CyHgNO35. Match the elements with the numbers found in one molecule of artificial
sweetener
carbon
hydrogen
argon
nitrogen
oxygen
1
7
>
3
5.
Reset
020 Edimentum. All rights reserved
A
12:46
10/13/

Answers

Answer  c-7, h-5,a-0,n-1,0-3. This is the right form of the given context that can be arranged in the proper order. The pairs are completed in this order.

This automatically matches all the elements with its number that is found in one single molecule of C7H5NO3S which is also an artificial sweetener. Each element matches with the right number contained in one molecule of it.

Explanation:

Explanation:

It is written: ‘As surely as I live,’ says the Lord,

‘every knee will bow before me;

every tongue will acknowledge God.’

Romans 14:11

How does the atmosphere make Earth warmer?

Answers

Answer:

Earth's surface warms up in the sunlight. At night, Earth's surface cools, releasing heat back into the air. But some of the heat is trapped by the greenhouse gases in the atmosphere. That's what keeps our Earth a warm and cozy 58 degrees Fahrenheit (14 degrees Celsius), on average.

Explanation:

How do you think the presence of farms will affect the oxygen concentration in the ponds? im in sixth grade so i can't really comprehend to much of words lik algae or my teacher will ask me how i got educated on the topic

Answers

Answer:

The more farms the less the oxygen concentration levels. Farmers use fertilizers to increase crop growth. When algae die, bacteria break down their remains, using up the dissolved oxygen in the water. The rapid loss of oxygen, or eutrophication, can kill fish and other wildlife living in the pond or stream.

Explanation:

Answer:

The more farms the less the oxygen concentration levels. Farmers use fertilizers to increase crop growth. When algae die, bacteria break down their remains, using up the dissolved oxygen in the water. The rapid loss of oxygen, or eutrophication, can kill fish and other wildlife living in the pond or stream.

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I say it is most likely agree

Answer:

OF COURSE I AGREE.A CHEMICAL REACTION REARRANGES THE CONSTITUENT ATOMS OF THE REACTANTS TO CREATE DIFFERENT SUBSTANCES AS PRODUCTS

most of the substances around us are ________

compounds
free atoms
pure elements

Answers

Answer:

free atoms

Explanation:

Answer:

Compounds is the answer i think

Explanation:

A compound consists of two or more kinds of atoms.

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The answer is Agree :)
The answer is agree :)

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THE ANSWER IS AGREEEEE!
......

Answer:

agree

Explanation:

you cannot undo the reaction when you bake the cake

Select all that apply. Wire is typically made out of metal because metal

Question 10 options:

Is malleable


Is ductile


Is brtittle


Conducts electricity

Answers

The correct answer is conducts electricity.

Metal is a really good conductor and is used in different electronics. It is also ductile, meaning it can be pulled into a thin wire.

Hope you have a wonderful day:)

Wire is typically made out of metal because metal is ductile and conducts electricity.

Ductility is the property of metal which makes it easy to be stretched into wire when drawn without breaking. This is a great feature for wires.

Conductor of  electricity : The ability for a material to allow electricity to pass through it with ease shows it is a good conductor of electricity.This is also a great feature for wires.

The transition metal, copper is usually  preferred for the manufacture of electrical wires This is because apart from being thermal resistant and cheap, it is very ductile and a good conductor of  electricity.

See more on the property of metals to make wires :https://brainly.com/question/13854828

Which shows the correct order of steps when using natural gas to generate electricity?

Energy is converted → gas is burned → boiling water makes steam → steam turns turbines
Gas is burned → boiling water makes steam → steam turns turbines → energy is converted
Boiling water makes steam → steam turns turbines → energy is converted → gas is burned
Steam turns turbines → gas is burned → energy is converted → boiling water makes steam i will give brainliest

Answers

The second answer o think
the second one, B.)

Gas is burned → boiling water makes steam → steam turns turbines → energy is converted
Boiling water makes steam → steam turns turbines → energy is converted

Steps of Cellular Respiration:

___ Carbon dioxide molecules form.
___ Sugar molecules are broken down.
___ A flow of electrons produces chemical energy and water.

Answers

so the first one is sugar molecules are broken down then it's carbon dioxide molecules form then a flow of electrons produces chemical energy water

The answer goes 2,1,3

Photosynthesis occurs. How do plants get the carbon dioxide they need for photosynthesis?

Answers

why wouldn’t that make a difference, hola mi, polo el coron
the get the carbon dioxide they need for photosynthesis from the composition of CO2 in the air

Compound: ________________
. Found in saltpeter in soil; contain nitrogen (N)

Answers

Potassium nitrate

Potassium nitrate is one of several nitrogen-containing compounds collectively referred to as saltpeter or saltpetre. Major uses of potassium nitrate are in fertilizers, tree stump removal, rocket propellants and fireworks. It is one of the major constituents of gunpowder (black powder).

Answer:

Potassium nitrate or KNO3

Explanation:

Why is rain likely when warm, moisture-laden air meets cold air? A) The lighter warm air will rise and cool down, causing condensation and rain. B) The cold air moves faster and pushes the warm air away, causing condensation and rain. Eliminate C) The moisture in the warm air condenses on contact with the cold air, causing rain to fall. D) The cold air mixes with the warm air, reducing its temperature causing moisture to condense.

Answers

Answer:

B) The cold air moves faster and pushes the warm air away, causing condensation and rain.

The answer is most likely B

Explain how getting sick can affect the body’s ability to maintain homeostasis.

Answers

Answer:

If your body manages to maintain homeostasis, then it means everything is in order, and you are in a healthy state. However, getting sick would indicate that your body conditions are not stable. This happens when the homeostasis is disrupted due to the interference of pathogens such as viruses and bacteria; for example, catching a flu virus would cause you to have a fever, cold, sore throat, and muscle aches. These symptoms eventually weaken your body and prevent you from performing your daily life functions.

The homeostasis has been affected while getting sick due to a change in temperature with disturbed electrolyte balance.

Homeostasis has been the ability of the body to maintain the equilibrium balance of the electrolytes, and elements for the proper functioning of the system.

The homeostasis has been maintained with the temperature and balance of the components in the preset limit. However with the change in the homeostasis results in the change in the balance and functioning of the organs.

While getting sick, we have changes in the body temperature along with electrolyte dis-balance. This results in disturbed homeostasis.

For more information about homeostasis, refer to the link:

https://brainly.com/question/9087319

What is radiation?????????????

Answers

Answer:

Radiation is the emission of energy through space in the form of particles and/or waves. Nuclear reactions are very different from chemical reactions. In chemical reactions, atoms become more stable by participating in a transfer of electrons or by sharing electrons with other atoms.

Radiation is said to be the transfer of heat between two objects without any medium between them , that can help them in heat transfer . Hence radiation is said to be the direct transfer of heat between two objects . For example the heat we get from the sun can be said to be from radiation as there is nothing between us and the sun that is helping the sun's heat reach us . The sun's heat reaches Earth directly . This is an example of radiation; which is a type of heat transfer .

Which of the following statements best defines the Law of Conservation of Mass?
Mass cannot be created but it can be destroyed under extreme presures
Mass cannot be conserved during a chemcial reaction: a little bit of mass is always lost
The mass cannot be created nor destroyed
Mass can be created and destroyed

Answers

Answer: mass cannot be created or destroyed.

Explanation:

Energy cannot be created or destroyed and mass is an energy!

Answer choice C

The Law of Conservation of Mass states Mass is neither created or destroyed in chemical reactions. It’s on Google as well.

How do you enter the density into the calculator?

A. volume (cm3) / mass (g) =
B.mass (cm3) / volume (g) =
C.mass (g) / volume (cm3) =
D.mass (g) X volume (cm3) =

Answers

Mass (cm3)/Volume (g)
Other Questions
STORIES OF USEFUL INVENTIONS, excerptBy S. E. Forman1911THE MATCHThere never was a time when the world was without fire, but there was a time when men did not know how to kindle fire; and after they learned how to kindle one, it was a long, long time before they learned how to kindle one easily. In these days we can kindle a fire without any trouble, because we can easily get a match; but we must remember that the match is one of the most wonderful things in the world, and that it took men thousands of years to learn how to make one. Let us learn the history of this familiar little object, the match.Fire was first given to man by nature itself. When a forest is set on fire by cinders from a neighboring volcano, or when a tree is set ablaze by a thunderbolt, we may say that nature strikes a match. In the early history of the world, nature had to kindle all the fires, for man by his own effort was unable to produce a spark. The first method, then, of getting fire for use was to light sticks of wood at a flame kindled by natureby a volcano, perhaps, or by a stroke of lightning. These firebrands were carried to the home and used in kindling the fires there. The fire secured in this way was carefully guarded and was kept burning as long as possible. But the flame, however faithfully watched, would sometimes be extinguished. A sudden gust of wind or a sudden shower would put it out. Then a new firebrand would have to be secured, and this often meant a long journey and a deal of trouble.In 1827, John Walker, a druggist in a small English town, tipped a splint with sulphur, chlorate of potash, and sulphid of antimony, and rubbed it on sandpaper, and it burst into flame. The druggist had discovered the first friction-chemical match, the kind we use to-day. It is called friction-chemical because it is made by mixing certain chemicals together and rubbing them. Although Walker's match did not require the bottle of acid, nevertheless it was not a good one. It could be lighted only by hard rubbing, and it sputtered and threw fire in all directions. In a few years, however, phosphorus was substituted on the tip for antimony, and the change worked wonders. The match could now be lighted with very little rubbing, and it was no longer necessary to have sandpaper upon which to rub it. It would ignite when rubbed on any dry surface, and there was no longer any sputtering. This was the phosphorus match, the match with which we are so familiar.Read the first sentence of the text:There never was a time when the world was without fire, but there was a time when men did not know how to kindle fire; and after they learned how to kindle one, it was a long, long time before they learned how to kindle one easily.What is the main purpose of this sentence in the essay? To describe the misery of early human existence To explain how early fires were started To suggest humans have an easier life than we once did To support the idea that matches really changed human life find the measure of angle J .will mark brainiest h(x) = 3x-4 g(x) = x + 3+ x Find h(n-2)+ g(n-2) Fill in the blank with the word that best completes the sentence.Les bananes sont __________que les brocolis.mieuxmeilleuremeilleurmeilleuresIF YOU ARE GOOD AT FRENCH, please head over to my profile and look at the questions- and answer questions starting from the one marked 14)best answers get marked 'brainliest'Thank you! HELP HELP HELP Why do minerals look the way they do Reread this excerpt from The Call of the Wild.An oath from Perrault, the resounding impact of a club upon a bony frame, and a shrill yelp of pain, heralded the breaking forth of pandemonium. The camp was suddenly discovered to be alive with skulking furry forms,starving huskies, four or five score of them, who had scented the camp from some Indian village. They had crept in while Buck and Spitz were fighting, and when the two men sprang among them with stout clubs they showed their teeth and fought back. They were crazed by the smell of the food. Perrault found one with head buried in the grub-box.What is the meaning of this excerpt?A. Perrault is fighting stray dogs that have invaded the campsite looking for food.B. Perrault is punishing members of his dogsled team for their aggressive acts.C. Perrault is reprimanding his dogsled team for stealing scraps of food.D. Perrault is feeding wild dogs and training them for work on his team. if a rock is soft and the color blue is red then my is a car driving a fish then why are my shoes untied? PLEASE HELP WITH THIS LAST ONE ASAP!!!!!!!!! A circular crop field has an irrigation system in which a pipe, with one end attached to a tower at the center of the field, turns continuously to deliver water. The horizontal distance, in meters, from the tip of the pipe to the farmhouse is represented by y = Equals 400 sine (StartFraction pi Over 8 EndFraction x + pi) + 500, where x represents time in hours.What does the amplitude of this function represent?A.the length of the pipeB.the distance between the tower and the farmhouseC.the time it takes for the pipe to complete one full circleD.the difference between the maximum and minimum distances from the tip of the pipe to the farmhouse conflict mean:A)Difference of opinin.B)Medical prognosis.C)Chance event.D)Ocean trip. Find the polynomial function of degree 3 such that f(2)=24 and x-1, x and x+2 are factors of the polynomial What are the relationships between the different wave properties (frequency, wavelength, wave speed, period, amplitude)Ex) As ___ increases, ___ increases/decreases/remains the same. Summary of silent spring does anyone know how to do the alien periodic table im stuck and cant go furhter I need help with this math problem plz help What is a result of a mixture? What is illegal for young people but legal for adults in other cultures? How does Iggys behavior around Kenny Kane contrast his behavior earlier in the novel? What can you infer about Iggys feelings towards Killer Kane?FREAK THE MIGHTY! PLEASE HELP! Sam is a graphic designer. Which option describes his job?O A. He uses illustrations, photographs, and text to improve the conditions of society.OB.He uses illustrations, photographs, and text to show his artistic skills.. .He uses illustrations, photographs, and text to solve visual problems for clients.OD.He uses illustrations, photographs, and text to solve business problems. 2.9030 has 4 significant digits.TRUE OR FALSE