Chemistry Middle School

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Answers

Answer 1
Agree. This is true because you’re technically destroying atoms
Answer 2

Answer:

disagree

lavoisers law of masses

Related Questions

Leandra is baking cookies, and they are ready to come out of the oven. Before she takes them out of the oven, she puts oven mitts on. Why does Leandra do this?

A Heat energy moves from warmer objects to cooler ones.
B Heat energy moves from cooler objects to warmer ones.
C The light energy from her hands will transfer to the cookies.
D The coolness of her hands will transfer to the cookies and will make them cold.

Answers

Answer:

A.

Explanation:

Heat can't come from a cold object but can from a warm of hot one.

Answer: A

Heat moves from the hotter object out and distributes into colder objects. Also heat can’t come from a cold object. You can apply this to a real life scenario as you put oven mitts on so you don’t burn yourself.

An object with a mass of 24g and a volume 6mL has a density of?
a. 0.25 g/mL
b. 6 g/mL
c. 144 g/mL

Answers

A. 0.25 g/mL
Because 6/24 is 0.25

Answer:

4

Explanation:

No matter how you look at it none of those answers are correct because Density = Mass ÷ Volume, which is tehcnically 24 ÷ 6 = ?

? = 4

Which of the following descriptions matches the motion shown in the graph.



A person leaves home and slows down for a pedestrian.


A person leaves home, picks up speed, and then stops at a red light.


A person is parked at parking lot and then speeds off.


A person walks down the block at a steady speed.


If I already asked this but please help ;v;

Answers

Answer:

A person leaves home, picks up speed, and then stops at a red light.

Explanation:

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:

I need it done assap

Answers

chemical reactions cannot be reversed and are visible
Chemical reaction, a process in which one or more substances, the reactants, are converted to one or more different substances, the products. Substances are either chemical elements or compounds. A chemical reaction rearranges the constituent atoms of the reactants to create different substances as products.

match each force abbreviation to the correct description.

Answers

Answer:

Fp- force exerted by a push or pull

Fn- support force at a right angle to a surface

Fg also known as an object's weight

Ff- force that comes from a resistance to motion

Explanation:

Correct on EDGE 2020

The force abbreviation to the correct description is describe below;

Fp- force exerted by a push or pull.

Fn- support force at a right angle to a surface.

Fg- also known as an object's weight.

Ff- force that comes from a resistance to motion.

What is force ?

A force is an influence that can cause an object's motion to change. A force can cause a mass object to change its velocity, or accelerate. Intuitively, force can be described as a push or a pull. A force is a vector quantity because it has both magnitude and direction.

The term "force" has a specific meaning in science. At this level, it is perfectly acceptable to refer to a force as a push or a pull. A force is not something that an object possesses or possesses. Another object applies a force to another. The concept of a force is not restricted to living or non-living things.

Thus, Fp- force exerted by a push or pull.

To learn more about the force, follow the link;

https://brainly.com/question/13191643

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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

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)

When a log burns in a fire, a a physical change has occurred. b mass is gained. c new substances are formed.

Answers

Answer: technically it is chemical and physical change

Explanation: chemical bc it’s burning and physical bc it’s going from a log to ashes

Answer:

C! New substances are formed.

Explanation:

The burning log will release carbon dioxide, which is a new substance that was never there in the first place.

Compound: ________________
. Found in apatite soil, contain phosphorus (P)

Answers

Answer:

Ca5 or Apatite

Explanation:

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:

I have 7 more questions left :’)

Answers

A, B for the first two
The 3rd question ranks: XZYW

Heather is investigating the properties of light and how it travels. She places a glass on the windowsill and waits for the sun to shine on the glass and observes what happens. Next, she places a piece of cardboard in front of the glass. Which statement describes the results of her observations?

A Since glass is translucent, most of the light energy was reflected from the glass.
B When the cardboard was placed in front of it, the cardboard absorbed some of the light energy.
C The light from the sun was able to travel through the glass. When the cardboard was placed in front of the glass, it absorbed the light energy from the sun and converted it into heat energy.
D The glass absorbed the light and converted the light energy into heat energy. When the cardboard was placed in front of the glass, the heat was transferred from the glass to the cardboard.
When the sun hit the glass, the light energy was absorbed. When the cardboard was placed in front of the glass, it absorbed the light energy from the sun and converted it into heat energy.

Answers

Answer: C

Since glass is translucent meaning you can see through it, heat energy from the sun will easily pass through it. If you were to conduct this test with a piece of metal the heat would be absorbed by the metal making it extremely hot. In this instance when they put a piece of cardboard in front of the glass it would absorb the heat energy since it is not translucent.

Answer:

nope it is not c

Explanation:

How many atoms are in (NH4)2SO4

Answers

Answer:

15

Explanation:

1N

4H

2S

(2*4=8)O

Ammonium sulfate has 15 atoms

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Answers

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

In which direction does heat energy move?

A From cold objects to colder objects
B From colder objects to warmer ones
C From warmer objects to colder ones
D From warm objects to warmer objects

Answers

Answer:

B

Explanation:

Because when a cold object is cold it start to get warm because Of the air.

and it start to warm and it gets warm.

C



Heat usually flows to colder objects in order to make them both the same temperature and when the colder object finally gets hot and is the same temperature as the hotter object it stops flowing hope this helps:)

What two gases in the atmosphere do animals and plants need to breathe and grow?

Answers

Answer: Plants and animals make the gases that the other needs to live. Plants need carbon dioxide and animals exhale carbon dioxide as a waste product. People and other animals need oxygen and plants produce oxygen during photosynthesis.

animals need oxygen to inhale, and exhale carbon dioxide. while plants on the other hand need carbon dioxide from the air to be able to photosynthesize

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:

Jessica is traveling from Miami, Florida, to Chicago, Illinois. Using the map, tell what the land will be like during the first half of her trip.



The elevation will be high.
The elevation will be low.
The land will be mountainous.
The land will stay below sea level.

Answers

The land will be high

Explanation:
The elevation would be high

Carlos listed some advantages and disadvantages of using nonrenewable resources.



Which best describes Carlos’s error?

Answers

Answer:

The answer is ores must be processed to make useful products!

Explanation:

What is the difference between force and velocity?

Answers

Answer:

A force pushes or pulls on an object, but velocity is simply something an object has

Explanation:

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.

Use the terms carbon dioxide, nitrates, phosphates, sulfates, and water to complete the chart that describes the inorganic compounds that provide most of the main elements of life to plants.

Answers

Answer: hi imi i new

Explanation:

You know the drill by now-

Answers

Answer:

distance   time

Explanation:

Answer:

First box : Distance

Second Box: Time

Explanation:

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Answers

Answer:

False

Explanation:

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

How many atoms are in Fe(OH)2

Answers

there's a total of five atoms

Answer:

There are 5 atoms

Explanation:

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And done! :)))))))))

Answers

The answer is 2456774 becaue i just know teehee

What can the student conclude about the experiments? (Attachment)
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A. Experiments 1 and 2 show chemical changes because bubbles were produced.

B. Experiment 1 shows a physical change because no new substances were produced, and experiment 2 shows a chemical change because a new substance was produced.

C. Experiment 1 shows a chemical change because bubbles were produced, and experiment 2 shows a physical change because a liquid turned into a solid.

D. Experiments 1 and 2 show physical changes because no new substances were produced.

Answers

Answer: B. Experiment 1 shows a physical change because no new substances were produced, and experiment 2 shows a chemical change because a new substance was produced.

Explanation: a physical change is reversible

chemical is 2 or more substances combined to make a reaction such as bubbling, change of color or temperature

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

The shallowest part of the ocean is the
a. Continental slope
b. Continental shelf
c. Trench
d. Mid-Oceanic Ridge

Answers

c. Trench................

B. Continental shelf
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Which of the following describes the ethnic communities that were created byimmigrants who settled in big American cities in the late 1800s?A. Most of the people spoke the same native language.B. There were many public parks and libraries.C. There were many private homes and private gardens.D. People from many different countries lived together. what is the importance of opportunity cost to the governmentk Select the correct answer.Read the following excerpt from the Declaration of Independence.We hold these truths to be self-evident that all men are created equal, that they are endowed by their Creator with certain unalienableRights, that among these are Life, Liberty and the pursuit of Happiness.--That to secure these rights, Governments are instituted amongMen, deriving their just powers from the consent of the governed. - That whenever any form of Government becomes destructive of theseends, it is the right of the People to alter or to abolish it, and to institute new Government, laying its foundation on such principles andorganizing its powers in such form, as to them shall seem most likely to effect their Safety and Happiness.Based on the excerpt, what was a major factor that led the colonists to rebel against the British government?OAOBThe government had failed to protect the colonists' basic rights,The government was exploiting the colonies natural resources,The government used colonial money to benefit the monarch.The government imposed unjust tax rates on rebelling colonists .OD When youre diving fractions what does the change In keep, change, flip tell you to do? Make this sentence more descriptive.Jillian had a fight with her best friend. help with this hard task please brainly guys It is important to keep the three parts of the health triangleSelect two responses.A. working togetherB. apartC. balancedD. working independently Can you help me find abcd please Pregunta 2George took his puppy to a dog park and unleashed her once they entered the gate. The puppy accelerated Northward, from rest, to 15 meters per second in 10seconds. What was China's displacement in this time interval? Find f'(a). f(x)=[tex]\sqrt{2-2x}[/tex] using (f(a+h)-f(a))/h Which equation represents the model below A) 2x - 2 = -6B) 4x = 6C) 2x + 2 = -6 D) 4x = -6 Mi madre prohibe que yo (almorzar) en la cafeteria. Prefiere (prepararme) sndwiches y fruta. El recepcionista quiere (llamar) al jefe para quejarse del botones Es mejor que el botones (bellhop) (llevar) el equipaje a las habitaciones. Nuestros padres permiten que (asistir) a sus conciertos y mi hermana siempre insiste en que nosotras (bailar). Alberto prefiere Insiste en que yo (cocinar). (lavar) los platos what fractions are equivalent to 3.375 Omar chose a book that explains the process of building a box car. What was most likely his purpose for choosingthis text?O to be entertained by a storyO to learn new facts about a topicO to find out how people feel about a topicO to get directions on how to do something L'vier est plein (full) de tasses et de verres sales. easy math - lots of points I have 10 red smarties five blue smarties four yellow smarties and two green smarties what is the probability of pulling three red smarties helppp please its due today I need help with this fast plzzz Find the slope.of the line that passes through (7,5) and (3,12) simplify it