When a solution is mixed, the following observations were made:

I. The mass of the solution remained the same.

II. Phase changes were observed.

III. The color of the solution remained clear.

IV. The temperature of the solution increased.

Which observation is a sign that a chemical change has occurred?

Answers

Answer 1

Answer:

IV. the temperature of the solution increased

Explanation:

all chemical change is either exothermic or endothrrmic, temperature is a sign of an exothermic reaction (pretty sure)


Related Questions

Why is school a thing

Answers

Answer:

because it helps us gain knowledge that will help us in the future

Explanation:

Identify the fuel that could be classified as a nonrenewable or renewable resource.

Answers

Answer:

Coal, petroleum, and natural gas are considered nonrenewable because they can not be replenished in a short period of time. These are called fossil fuels.

Explanation:

what are the characteristics of a frog ??​

Answers

They do not have a tail and they have a webbed type of feet that helps them leap, they have smooth skin as well.

Draw a diagram of a cell in anaphase 2

Answers

please mark brainliest

Which type of front most likely signals violent thunderstorms?
A cold front
B. warm front
C. stationary front
D. occluded front

Answers

Answer:
B.) warm front

Explanation:
This is also why hurricanes occur late throughout the year because it’s often hot.

Olfaction and hearing are processed in the ____________.

Answers

Answer: Temporal Lobes

Someone sprays perfume in another room. It can be smelled a few minutes later. Which process is this called?.

Answers

Answer:Diffusion is a much more general term which can apply to all different types of molecules. 

Explanation:

will mark brainliest that has best answer!!!


how can we conserve our natural resources in the environment?

Answers

Answer:

Switching to sustainable energy sources such as solar power, hydroelectric power and wind power can reduce the amount of fossil fuels being used up. Fossil fuels are natural resources from the environment, but when burned the waste product of it is released into the environment and can potentialy affect other natural resources. Switching to a renewable energy source can help conserve natural resources. Renewable energy sources can be used to harness the energy we need without producing harmful products that affect the environment and it's resources.

An advantage of using animals from an established breeding farm over those from a breeding colony is that:

Answers

Answer:

Long division calculator with decimals shows the work step by step. Solve long division with decimal numbers. Calculate the quotient showing long division ...

Explanation:

Long division calculator with decimals shows the work step by step. Solve long division with decimal numbers. Calculate the quotient showing long division ...

Sorry

20. Does facilitated diffusion require energy for the cell?

Answers

Answer: no

Explanation: The solute can move "downhill," from regions of higher to lower concentration, relying on the specificity of the protein carrier to pass through the membrane. This process is called passive transport or facilitated diffusion, and does not require energy.

Which of the following is the non-living part of the cell?
1 point
Cell membrane
Cytoplasm
Cell Wall
Centrosome

Answers

Answer:

As I think the answer is cell wall.

Answer:

cell wall

Explanation:

Cell walls are only found in the plant cells. They are made out of a non-living cellulose so that we say the cell wall is dead.

what are chlamydomonas​

Answers

Chlamydomonas is a genus of green algae consisting of about 150 species all unicellular flagellates, found in stagnant water and on damp soil, in freshwater, seawater, and even in snow as "snow algae"

In California wildfires are very common, how do wildfires affect the carbon cycle? a More sugars will be available for animals to eat b The availability of fossil fuels fo r use by industries in the area will be reduced c Less carbon dioxide would be removed from the atmosphere in the area by plants d More carbon dioxide will be removed from the atmosphere in the area by plants

Answers

Answer:

d. More carbon dioxide will be removed from the atmosphere in the area by plants

Explanation:

Wildfire are defined as an uncontrolled or unplanned fire in an area.

Wildfires are common in California because of combustible vegetation and that affects the carbon cycle. When vegetation burns during wildfire it releases a lot of carbon dioxide. Higher carbon-dioxide increases the rate of  photosynthesis in plants. Plants utilize the higher CO2 concentration at a faster rate and more carbon dioxide will be removed from the atmosphere.

Hence, the correct answer is "d".

paper is a plant fibre Yes or No if yes how it become a plant fibre and how it is obtained from plants?​

Answers

Answer:

Yes paper is a plant fibre .

Paper is a dried, compressed mat of plant fibers—nothing more, nothing less. ... Paper is more like the fabric we call felt, made without the weaving stage by pressing together cellulose fibers extracted from plants and trees so they knit and fuse to form a strong, solid, but still very flexible mat.

Why does an energy transfer not always result in phase change? Amplify

Answers

Answer:

These energy exchanges are not changes in kinetic energy. They are changes in bonding energy between the molecules. “If heat is coming into a substance during a phase change, then this energy is used to break the bonds between the molecules of the substance

((◠‿◕)(◠‿◕)

How should “free water” have been administered to the patient?

Answers

Answer: Via ice chips or water, although not appropriate for all patients.

Explanation:

Patient is allowed to drink water btwn meals (beginning a minimum of 30 mins after meals); oral care must be done prior to consuming water; patient should be upright and use appropriate swallowing strategies.

In warm, shallow, marine environments, corals and other marine life typically construct _______. Multiple choice question. Stromatolites tidal flats reefs

Answers

Answer:

reefs

In warm, shallow, marine environments, corals and other marine life typically construct reefs.

how would a plant cell function if it did not contain chloroplasts?​

Answers

Without chloroplasts the plant would probably die

Because chloroplasts are used for photosynthesis, which gives the plant food and energy it needs to survive and without them the plant can't get any food/nutrients

Question 5 of 25 The development of cars has pros and cons. The car has allowed for better transportation, but it is also responsible for a great deal of pollution. Which activity can help reduce pollution through the use of new technology?​

Answers

Answer: C. building cars that can better withstand collisions

Directions: This group of questions consists of five lettered headings followed by a list of phrases or sentences. For each phrase or sentence, select the one heading to which it is most closely related. Each heading may be used once, more than once, or not at all
This group of questions refers to molecules of the following substances.
(A) Cytochrome
(B) FADH2
(C) NAD
(D) NADP
(E) Oxygen

Answers

These molecules involve an intermediate electron acceptor for oxidations that occur during glycolysis and Krebs reactions. It is part of cellular respiration.

What is cellular respiration?

Cellular respiration refers to a series of chemical reactions by which foods can be aerobically converted into energy (ATP) by using oxygen.

Cellular respiration can be divided into Glicolisys, the Krebs cycle and oxidative phosphorylation.

Cellular respiration involves oxide reduction reactions that involve the transfer of electrons (e-) between two or more substances.

Learn more about cellular respiration here:

https://brainly.com/question/2809259

what type of cell is osmosis jones?

Answers

Answer:

white blood cell

Explanation:

What term associated with psychological disorders best describes a thought, feeling, or behavior that is atypical or rare?.

Answers

Answer:

Personality disorders are a group of mental health conditions that are characterized by inflexible and atypical patterns of thinking, feeling, and behaving. These inner experiences and behaviors often differ from the expectations of the culture in which someone lives.

Explanation:

b) Type a second paragraph comparing the accuracy of your model to actual organ systems and
their functions.
i.
Consider how a model is different from an actual human body.
ii.
Describe the limitations of a model.

Answers

Answer:

In comparison to the real thing, a model can help you visualize or picture in your mind something that is difficult to see or grasp, as well as express ideas and understand the process. Models, on the other hand, cannot incorporate all of the features and accuracy of an actual human body part since they must keep it simple enough to understand, which limits the models, despite their value.

Explanation:

The phospholipids of plasma membranes are amphipathic: they have both hydrophilic and hydrophobic regions. The hydrophobic core of the plasma membrane helps some materials move through the membrane, while it blocks the movement of others. How does the structure of the cell membrane help to enable its function?

Answers

Answer: The structure of cell membrane is semi-permeable which allows it to pass only certain molecules.

Explanation:

The phospholipid bilayer includes phospholipids that are tightly packed. This membrane is semi-permeable in nature and it can be said that it is selectively permeable. Across this the small, nonpolar materials can pass through as lipid tails of the membrane are nonpolar in nature. Examples of the molecules that can pass through the lipid bilayer are oxygen, carbon dioxide, and others. But the water soluble molecules need assistance of nonpolar molecules to pass through it like glucose, and amino acids as they are oppose by the hydrophobic tails.

Which of these changes to the cell would cause the greatest reduction in the activity of catalase? A. A decrease in the concentration of hydrogen and oxygen B. An increase in the concentration of hydrogen peroxide C. A strong bonds between carbon atoms that cannot be broken D. Ionic bonds between carbon atoms and oxygen atoms

Answers

Answer:

A. A decrease in the concentration of hydrogen and oxygen

Explanation:

Catalase's function is to catalyze the decomposition of hydrogen peroxide (H₂O₂), which is a toxic substance for cells, into oxygen (O) and water (H₂O).

The following chemical reaction can represent the catalase enzymatic action:

2H₂O₂ + Catalase → H₂O + O₂

Due to this, as oxygen and hydrogen (H) are structurally essential for the catalase reaction, the decrease in the concentrations of these substances would also reduce the enzyme's action potential.

What is the most common element found in the human body? Why is it so
common?

Answers

Answer:

Sample Respond: Oxygen is the most abundant element in the human body. It makes up 65 percent of the total weight of a person. For a person with a weight of 155, about 94 pounds of her total weight would be made of the element oxygen. This is due mainly to the body's water content.

Explanation:

I got 100 %

Answer:

Oxygen... Oxygen is the most common element in the human body, comprising approximately 65.0% of body mass. Most of the oxygen present is found in the form of water.

Explanation:

does this help you???

6. In her essay, White discusses how she uses trial-size detergent and orders water instead of wine
If you were in a tough spot financially, are there things you would be willing to give up? What
would you give up and why? How would your life change? Discuss.

Answers

In a difficult financial situation, I would be willing to give up, I wouldn't give up on dreams, I would replan my life.

What is financial stress?

Difficulty dealing with debts, excessive worries and anxiety about interest; excessive fear of losing a source of income; fear of having to lower the standard of living in which one lives; among others.

With this information, we can conclude that in a difficult financial situation, I would be willing to give up, I wouldn't give up on dreams, I would replan my life.

Learn more about financial in brainly.com/question/11555016

Answer: If I was in a bad financial spot, and needed to save money I would do multiple things, such as making my own coffee at home rather than stopping at Starbucks, or getting water instead of a soda at a restaurant. Simple things that can be changed to be cheaper for me. This wouldn’t really change my life because it is small, simple changes.

Explanation:

The coagulation of
plasma and
platelets is what
causes....
A. hemoglobin production
B. blood clotting
C. white blood cell
production
D. gas exchange

Answers

The coagulation of plasma and platelets is what causes blood clotting in organisms.

What is Clotting?

This is the process in which blood changes to gel and helps to stop bleeding when someone gets hurt.

Blood clotting occurs when plasma and platelets coagulates to form a layer  thereby stopping blood flow.

Read more about Clotting here https://brainly.com/question/1501224

What happens to the temperature and density of the material between points D and A

Answers

Answer:

It becomes naturally warm

Explanation:

which structure is present in bacteria but not in a virus?
1) Nucleic Acid
2) Capsid
3) Cell Membrane
4) Envelope

Answers

3) Cell Membrane


Its a structure of the cells in living organisms formed by a double layer of lipids, glycoproteins, and structural proteins.

Hope this helps <3

Answer:

Yes the only structure not present in a virus is C) Cell membrane

correct on edg2021 :)

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