Chemistry Middle School

Please answer the following essay question with 5-7 sentences.
How is a chemical change different from a physical change?

Answers

Answer 1
Chemical change is different from physical change because physical change is the appearance or form changes. but the matter in the substance does not change. but in chemical change the kind of matter changes and at least one new substance with new properties is formed. *you can add more punctuations to make it 5-7 if you would like:)*
Answer 2
In a physical change the appearance or form of the matter changes but the kind of matter in the substance does not. However in a chemical change, the kind of matter changes and at least one new substance with new properties is formed. The distinction between physical and chemical change is not clear cut.

Related Questions

Which of the following solutions is more dilute?
A.The solution with 10 grams of honey and 100 mL of water.
B.The solution with 5 grams of honey and 100 mL of water.
C.The solution with 15 grams of honey and 100 mL of water.
D.The solution with 20grams of honey and 100 mL of water.

Answers

Answer: the solution with 5 grams of honey and 100 mL of water

Explanation:

Is a,,,,,,,,,,,,,,,??,,,??,,,,,,

please I need a summary about the virus and the anti body

Answers

Answer:

EBV antibodies are directed against (a) EBNA, (b) early antigen (EA), (c) the membrane antigen (MA) expressed on the surface of cells late in the lytic cycle, and (d) the viral capsid antigen (VCA) expressed within cells late in the lytic cycle.

Explanation:


To summarize – an antigen is a disease agent (virus, toxin, bacterium parasite, fungus, chemical, etc) that the body needs to remove, and an antibody is a protein that binds to the antigen to allow our immune system to identify and deal with it.

A hydrogen atom is made of one proton and one electron. Electrons orbit the nucleus in

A squares.
B energy levels.
C Bohr dot models.
D atomic structures.

Answers

Answer:B i think i hope this helps

Explanation:

The answer to your question is B

HELPPPPP!!!!!!!!!!!!!!!!!!!!!!!!!!!! 30 POINTS!!!!!!!!!!!!!!

Answers

Answer:

What is this please send questions properlythen i will answer it properly

Why is using dendroclimatology not always a true measure of a past climate?

Answers

Answer:

Dendrochronology is the study of data from tree ring growth. Due to the sweeping and diverse applications of this data, specialists can come from many academic disciplines. There are no degrees in dendrochronology because though it is useful across the board, the method itself is fairly limited. Most people who enter into studying tree rings typically come from one of several disciplines: 1.

Explanation:

    Along with the advantages of dendroclimatology are some limitations: confounding factors, geographic coverage, annular resolution, and collection difficulties. The field has developed various methods to partially adjust for these challenges.

There are multiple climate and non-climate factors as well as nonlineareffects that impact tree ring width. Methods to isolate single factors (of interest)

How does an atom change if all of its electrons are removed?
p.s. I'll mark the first answer the brainliest if it is correct! ;)

a. The atom’s volume increases.

b. The atom’s mass increases.

c. The atom becomes positively charged.

d. The atom becomes negatively charged.

Answers

c. The atom becomes positively charged

if the electrons are removed it means theres no longer a negative charge to balance the positive charge of the protons in the atom

C the atom becomes positively charged

5. Name five plants and animals that lived in ancient Antarctica

Answers

Answer:

Two hundred million years ago, Antarctica was a lush, temperate rainforest home to crocodile-sized amphibians and rhinoceros-sized dinosaurs.

Explanation:

Animals:

1 ankylosaurs (the armored dinosaurs), mosasaurs and plesiosaurs (both marine reptilian groups).

2 Cry-oloph-os-auru-s was the ap-ex pre-da-tor of its region when it hunted in the lands of Jur-as-sic Period Antarctica.

3 plesiosaurs.

4 mosasaurs.

Plants:

1 palm trees.

2 ferns and Tanglefoot.

3 Evergreen trees

4 Glossopteris

Help?
The question is down below.

Help?The question is down below.

Answers

The first three are T I don’t know about the next two and the last one is T
I believe first one is T. The next one atoms are composed of smaller particles of matter so I think T. The third one is T. The fourth is T. The fifth might be false. And lastly atom is a small part of matter so false maybe. If that makes sense

List 2 evidences for climate change.

This is 6th grade science. Amplify.

Answers

Answer:

Global Tempurature is rising

Sea level is rising

Explanation:

This is evidence of climate change. Depending on where you live it could be different like in florida there was a drought.

two pieces of evidence would be that
1. our sea level is rising my a lot
2. our global temperature has changed a lot over the years as well.

Where is the DNA stored in a cell?

Answers

Answer: nucleus  

Explanation:

The dna cells are in the Nucleus

Pls could help me complete the "standart form" part :(

Pls could help me complete the "standart form" part :(

Answers

Answer:

I don’t know bro

Explanation: WHY DID U REMOVE THIS

A plate of food has both thermal energy (form of kinetic energy) and chemical energy (form of potential energy).

True
False

Answers

I believe it’s true
This statement is True :)

Which of Newton’s Laws of Motion is represented in the following description: The worker complaining because the box was too heavy to move. He could not apply enough force to move it.

1st Law of Motion
2nd Law of Motion
3rd Law of Motion

Answers

Answer:

In the first law, an object will not change its motion unless a force acts on it. In the second law, the force on an object is equal to its mass times its acceleration. In the third law, when two objects interact, they apply forces to each other of equal magnitude and opposite direction.

Explanation:

3rd law of motion is what is represented

1. Using D10W and a vial of NaCl 4 mEq/mL, how many mL of NaCl are needed to prepare 250 mL of a
D10/NS solution?
a. 4.8mL
b. 9.6ml
c. 19.6mL
d. 154mL

Answers

To prepare 250 mL of a D10/NS solution using D10W and a vial of NaCl 4 mEq/mL, you would need 9.6 mL of NaCl. Normal saline (NS) contains 154 mEq/L of sodium chloride (NaCl). To prepare 250 mL of NS, you would need 250 mL * (154 mEq/L) = 38500 mEq of NaCl. Since the vial of NaCl contains 4 mEq/mL, you would need 38500 mEq / (4 mEq/mL) = 9625 mL = 9.6 mL of NaCl. So the correct answer is b. 9.6ml.

the correct answer is A 4.8 mL

I NEED HELP PLS HURRY!
Element “R” has a half-life of 2 minutes. After 6 minutes, how much of a 100 g sample would remain?

Answers

Answer:

12.5 g

Explanation:

If element R's half life is 2 minutes then we need to divide 100 g by 1/2 3 times. 100/2 = 50/2= 25/2= 12.5 g.

Hope this helps!

answer to this question is 12.5kg

Which statement best describes the Sun-Earth-Moon system during a spring
A. The Moon's orbit is perpendicular to Earth's orbit.
B. The Sun, Earth, and the Moon are arranged in a straight line.
O C. The Sun, Earth, and the Moon form a night angle.
D. The Moon's orbit brings it closer to Earth.
(extra points for who ever answers first and the right answer please)

Answers

Answer:

That answer is B

Explanation:

The sun's gravity pulls on earth's water while the moon gravity pulls on water in the same places

It is B ….. the sun earth and the moon are arranged in a straight line

I'll give Brainliest!!!
Which of the following is not a physical change?
A.sublimation of iodine C. tearing a piece of cloth
B. burning of wax in a candle D. dissolving sugar in a tea

Answers

Answer: B. Burning of wax in a candle

Explanation: Burning of wax is a chemical change due to the combustion of fuel in the presence of oxygen to produce carbon dioxide. A physical change part of it is when the wax of candle melts and the shape is lost.

The answer would be B.

What happens to the atoms that make up hydrogen fuel as it burns?

Answers

Answer:

When hydrogen fuel burns, its atoms combine with oxygen atoms in the air, which creates a chemical reaction that releases energy in the form of heat and light. The hydrogen atoms lose their outermost electrons, becoming positively charged ions (protons). These ions combine with the oxygen atoms to form water molecules (H2O), which evaporate into the air as steam. Therefore, the atoms that make up hydrogen fuel ultimately become part of water molecules during the process of combustion.

Explanation:

When hydrogen fuel burns, its atoms combine with oxygen atoms to form water molecules. So the atoms that make up hydrogen fuel become part of the water molecules.

G
A substance occupies one half of an open container. The atoms of the substance are closely packed but are still
able to slide past each other.
What is most likely the phase of the substance?
gas
liquid
solid and gas
O liquid and solid
Mark this and return
Save and Exit
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Submit

Answers

Answer:

Solid and gas

Explanation:

The total answer is solid and gas

What type of person studies and collects data on the weather?

Answers

The answer would be a Meteorologist
Meteorologist is a person who studies and collects data

Which of the following was a major focus of the Mississippian belief system?

physical connection
an anointed leader
a single deity
spiritual connection

Answers

Answer:

i think answer is spiritual connection

spiritual connection

Which object has the most kinetic energy?

A. a train that is stopped
B. a car moving at a slow speed
C. ​​a train moving at a slow speed
D. a car that is stopped at the top of a hill

Answers

C

Explanation: kinetic energy means that the object is moving, automatically eliminating A and D since they are both stopped. The formula for kinetic energy is KE=1/2m(v^2) (m= mass and v= velocity). Since the train has more mass than the car, the train has more kinetic energy.
C is the right answer because train has more mass than car

Drag the words to complete the paragraph.
Put responses in the correct input to answer the question. Select a response, navigate to the desired input and insert the response. Responses can be selected and inserted using the space bar, enter key, left mouse button or touchpad. Responses can also be moved by dragging with a mouse.
A Response area must be applied to get an object moving because an object at rest will remain at rest unless acted upon by a(n) Response area force. Balanced forces result in Response area velocity; unbalanced forces result in a(n) Response area in velocity. Response area is an object Response area that allows it to Response area a change in motion or a change in resting state. The Response area of an object is a measure of an object's inertia- the Response area the mass, the Response area it is to change its motion

Answers

Answer:

I don't understand the question

A net external force must be applied to get an object moving because an object at rest will remain at rest unless acted upon by a net external force.

What is newtons law ?

Newton's laws of motion are three fundamental classical mechanics laws that describe the relationship between an object's motion and the forces acting on it. These laws are summarized as follows: Unless acted upon by a force, a body remains at rest or in motion at a constant speed in a straight line.

Balanced forces result in zero velocity; unbalanced forces result in constant velocity.

An acceleration of an object depends on the mass that allows it to unbalance a change in motion or a change in resting state.

Mass of an object is a measure of an object's inertia-the motion the mass, the force it is to change its motion.

Thus, To move an object, a net external force must be applied because an object at rest will remain at rest unless acted upon by a net external force.

To learn more about the Newton's laws, follow the link;

https://brainly.com/question/15280051

#SPJ2

At what pressure, in atm, will 1.8 mol O₂ occupy a volume of 56.0 L at 35°C? Round your answer to the nearest hundredths. Don't forget to label your units.

Answers

Answer:

1,088.888888888889

Explanation:

Using the word bank below label the wave.

A Trough. B Crest. C Amplitude. D Wavelength.

3). 4). 5). 6).

Using the word bank below label the wave.A Trough. B Crest. C Amplitude. D Wavelength.3). 4). 5). 6).

Answers

Answer: crest I don’t really know how to explain it but yea it’s crest

Crest B it’s the 2 humps which is called the crest

Only answer if you know 100% its correct. this means if your not sure, don't answer.

Only answer if you know 100% its correct. this means if your not sure, don't answer.

Answers

Answer:

D

Explanation:

The last one on there

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The statement which best describes solar electric energy is ~

Sunlight is converted to electricity in a photovoltaic cell.

In this process, the photovoltaic cell converts all the Sola energy derived from Sunlight into electricity.

How many times are you testing your prototype? Question 3 options:
10 3 0

Answers

All the time depending on the angle

In an electrical wire, if instead of copper, plastic wire is used. Would it conduct electricity?Justify your answer.

Answers

Answer:

No, a plastic wire would not conduct electricity. This is because plastic is an insulator that does not allow electric current to flow through it. In a wire, electrical conductivity is provided by the movement of charged particles - typically, electrons. Copper is an excellent conductor of electricity because it has a high number of free electrons that are not bound to atoms and can move through the wire very easily. However, in a plastic wire, the tightly bound electrons of its atoms do not allow for the free flow of charges, thus preventing the passage of electric current.

No it would not conduct electricity as it is a insulator

help pls i will give brainlest

help pls i will give brainlest

Answers

Answer: its 5ft tall and 12 inches

Explanation:

The answer is 5 foot 12 inches

HELP ASAP!! An experiment is performed in which a crystalline substance is added to a beaker filled with room-temperature water. The following observations were made:
1. The crystals dissolve.
2. A precipitate forms.
3. The bottom of the beaker feels warm to the touch.
4. Bubbles begin to form in the water.
Which observations are evidence that a chemical reaction took place?

Answers

Answer:

observations (2), (3), and (4) provide strong evidence that a chemical reaction occurred.

Explanation:

Observations (2), (3), and (4) are evidence of a chemical reaction because a precipitate formed, energy was released (the bottom of the beaker felt warm), and bubbles were formed in the water. Observation (1) indicates a physical change, not a chemical reaction.

observations 2, 3, and 4 indicate that a chemical reaction has occurred.
Other Questions
Rte me..................................................... Help me please please please A ball is dropped from a height of 20 feet above the ground. The velocity v(s) of the ball after it has travelled a distance of s feet is modeled by the function v(s) = 60s. What is the domain of the function v(s) in terms of the context? (A) All positive integers (B) All positive real numbers (C) All integer greater than or equal to 0 and less than or equal to 20(D) All real numbers greater than or equal to 0 and less than or equal to 20 sharing the financial consequences associated with risk in the insurance industry is sometimes called (a) Consider the differential equation -u"(x) = x in (0,1), (0) = u(1) = 0. (1) = (x-x), show that u(x) is a solution to (1).(ii) Derive the weak formulation of problem (1) and show it is well posed, specify any forms and spaces introduced.[You may use without proof the ld inequalities proved in lectures but must indicate clearly which inequality you are using when doing so.] Imagine you are in Buenos Aires' largest shopping mall, Abasto shopping.During your visit to the mall, you decide to buy a few things for a family member before returning back home. Write a 10 to 15 sentence journal entry in Spanish in which you detail some of the things that you purchased at the Abasto mall. You may choose to include some of the gift and clothing accessory vocabulary words that you learned earlier in this unit.Your journal entry should include:* A description of what you bought* Details about where you bought it* Name and relation of the person for whom you bought the giftIn your journal entry, make sure to use expressions that signal the past tense, and the preterite tense of regular -ar verbs. Remember to add an opinion to your portfolio. #2 Due to the many deaths of people working to build the Great Wall, what other name is the Great Wall known as? Answer 2: Assuming that the minimum wage is above the market clearing wage in the economy; an exogenous increase in labour demand, will.a. raise the market clearing wage and increase both dis-equilibrium and equilibrium unemployment.b. lower the market clearing wage, but increase both dis-equilibrium and equilibrium unemployment.c. lower the market clearing wage, decrease dis-equilibrium unemployment and increase equilibrium unemployment.d. raise the market clearing wage, decrease dis-equilibrium unemployment and increase equilibrium unemployment.e. raise the market clearing wage, but decrease both dis-equilibrium and equilibrium unemployment. Y=5+6x Y=6x+5 how many solutions In its first year of operations, Sunland Company recognized $33,800 in service revenue, $6,700 of which was on account and still outstanding at year-end. The remaining $27,100 was received in cash from customers. The company incurred operating expenses of $19,600. Of these expenses, $12,640 were paid in cash; $6,960 was still owed on account at year-end. In addition, Sunland prepaid $3,250 for insurance coverage that would not be used until the second year of operations.(a) Calculate the first year's net earnings under the cash basis of accounting, and calculate the first year's net earnings under the accrual basis of accounting. Cash Basis Accrual Basis Net Income $ GA (b) Which basis of accounting (cash or accrual) provides more useful information for decision-makers? Accrual basis Cash basis Media . Determine the monthly payments of principal and interest for a 20 year loane. Determine their total monthly payment, including homeowners' insurance and taxesf. Determine whether the couple will qualify for the 20 year loang. Determine how much of the first payment on the loan is applies to the principal. Which function has a greater speed, and what is the greater speed? Which of the following items should be in italics?(1 point)ResponsesAn article in a newspaper titled Who Is Rin-Tin-Tin?A short story titled An Ode to Rin-Tin-TinA country music song titled Me and Rin-Tin-TinThe television series titled Adventures of Rin-Tin-Tin PLEASE HELP ME Challenge In a company, 85 % of the workers are woman . If 585 people work for the company who aren't woman , how many workers are there in all? there are ___ workers in all what term is given to medieval books that contained prayers to be read at specific times during the day? find the dimensions of a cone of maximum volume that can be inscribed in a sphere of aradius 10cm What additional information is obtained by measuring two individuals on an ordinal scale compared to a nominal scale Review the following quantitative research question. Identify the independent and dependent variables. What is the association between education level and HIV status among Black women in the Deep South? Find the circumference of the given circle list and explain at least one of the scientific advance of the cold wasr era be sure to include the impact on societies?