A student placed a small chip of limestone into a hydrochloric acid solution, and carbon dioxide gas was released. The carbon dioxide provided evidence that
A. The formation of an element occurred.
B. Only a physical change occurred.
C. A chemical change occurred.
D. Only a loss of mass occurred.

Answers

Answer 1

C. A chemical change occurred.


Related Questions

HELP ASAP
Joe is experimenting to determine which liquid will cause bean plants to grow faster. He watered the plants with equal amounts of liquid and measured their height every other day. The plants are in the same pots with different soils and placed in the same location. Will Joe be able to obtain reliable data to write a supported conclusion?
Yes, because he is only observing the height of the plant.
Yes, because he is consistent with watering the plants.
No, because he used different soils.
No, because he uses only one type of plant.

Answers

Answer:

No, because he used different soils.

Explanation:

which liquid will cause bean plants to grow faster.

He watered the plants with equal amounts of liquid and measured their height every other day.

The plants are in the same pots with different soils and placed in the same location.

Ok so last statement made the experiment wrong.

As a constant variable the soil should be the same for all plants only the liquid should change

Plz help me its only 1 question

Answers

Answer:

the first one

Explanation:

the car slowly started and accelerated

Its the second one. Since its continually accelerating.

The division of the cytoplasm, which follows Mitosis, is called...

Answers

Answer:

Cytokinesis,

Explanation:

Cytokinesis, the division of the cytoplasm to form two new cells, overlaps with the final stages of mitosis. It may start in either anaphase or telophase, depending on the cell, and finishes shortly after telophase.

The division of the cytoplasm, which follows Mitosis, is called Cytokinesis. This is further explained below.

What is Mitosis?

Generally, Mitosis is simply defined as a kind of cell division that produces two daughter cells with the same number and type of chromosomes as the parent nucleus, as seen in normal tissue growth.

In conclusion, Cytokinesis is simply defined as the division of the cytoplasm that occurs after mitosis to produce two daughter cells.

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There is a lot of talk about gaps in the fossil record. This means that we do not necessarily have fossils for every organism that has ever lived. What do you think could account for these gaps in the fossil record?

Answers

Answer:

Explanation:

The rate decomposition of dead remains, to a large extent, determines whether there would be fossils left of the organism after it has been long gone or become extinct. Environmental factors (such as harsh weather condition and early insect invasion of dead remains) could increase the rate of decomposition of dead remains which could really make it difficult for fossils to be available for such organisms under these factors (especially if the organism is restricted to a particular region by nature) .

it takes 25 min to cook 10 egg how long does it take to cook 20​

Answers

Answer:

it takes 50 min

Explanation:

20 is twice of ten so if it take 25 min to cook ten then it is 50 min to cook 20.

Work for it:

10 x 2 = 20

10 eggs=10 min

25x2=50

Answer:

it takes 50 minutes to cook 20 eggs

Explanation:

ok first you have to see how long it takes 1 egg to cook so 25/10=2.5minute an egg then u multiply 2.5 x 20=50

hope this helps

help need answer asap !!

Answers

Wet is irrigation Forest is paper preserving aesthetic value is park trapping sediments as water

How do I calculate a heart rate?

Answers

Explanation:

To check your pulse at your wrist, place two fingers between the bone and the tendon over your radial artery — which is located on the thumb side of your wrist. When you feel your pulse, count the number of beats in 15 seconds. Multiply this number by four to calculate your beats per minute.

You should be on the lookout for tornadoes
during___
because the two often occur
together.
х
thunderstorms
winter storms
blizzards
hurricanes

Answers

The answer would be A.thunderstorms

Hope this helps

Have a great day/night

Place the terms into the correct column that describes the reactions of photosynthesis.

Answers

Answer:

In the light-dependent reaction, which occurs in the THYLAKOID MEMBRANE of the chloroplast, energy from SUNLIGHT is used to breakdown WATER to release electrons in order to synthesize ATP and NADPH from ADP and NADP+. In a nutshell, the processes involved in this stage are Electron transport chain, photosystem I, photosystem II, and ATP synthase.

- In the light-independent stage, also called CALVIN CYCLE, the ATP, NADPH, and CO2 are used as reactants to synthesize SUGAR (glucose), NADP+ and ADP (which goes back to the first stage) as products.

Explanation:

In the light-dependent reaction, which occurs in the THYLAKOID MEMBRANE of the chloroplast, energy from SUNLIGHT is used to breakdown WATER to release electrons in order to synthesize ATP and NADPH from ADP and NADP+. In a nutshell, the processes involved in this stage are Electron transport chain, photosystem I, photosystem II, and ATP synthase.

- In the light-independent stage, also called CALVIN CYCLE, the ATP, NADPH, and CO2 are used as reactants to synthesize SUGAR (glucose), NADP+ and ADP (which goes back to the first stage) as products.

The light-dependent reactions involve both photosystems I and II along with the electron transport system. ATP is synthesized in this reaction, so ATP synthase is also included.

What is Photosynthesis?

Photosynthesis may be defined as a process through which green plants and some photosynthetic algae synthesize their own food in the form of glucose with the help of carbon dioxide and water in the presence of sunlight.

The light-dependent reaction of photosynthesis occurs in the thylakoid membrane. Sunlight and water are the reactants of this reaction. The products of this reaction are NADPH, ATP, and oxygen.

Light-independent reaction involves the Calvin cycle. It occurs in the stromal part of the chloroplast. The reactants of this reaction are carbon dioxide, ATP, and NADPH while the products are glucose, NADP+, and water.

Therefore, the difference between light-dependent reaction and light-independent reaction is well described above.

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In what ways is the composition of the sun different from the Earth? Choose all that apply.
The Sun does not have continents.
O The Sun has a thick, solid core.
O The Sun does not have a solid surface
The Sun does not have a solid core.
The Sun has continents known as plasma zones.

Answers

Answer:

1,3,4

that's my answerrrr

Which factor makes enzymes well-suited to the role of catalyst in a biochemical reaction?

A)Enzymes do not affect the energy of a reaction.

B)Enzymes slow down reactions so products can form.

C)Enzymes can be reused because they do not permanently bond with substrate.

D)Enzymes can only bind to other enzymes so the same product is formed each time.

Answers

Answer: C

Explanation: Once an enzyme binds to a substrate and catalyzes the reaction, the enzyme is released, unchanged, and can be used for another reaction.

Enzymes can be reused because they do not permanently bond with substrate.

What are Enzymes?

A biological catalyst called an enzyme is usually always a protein. It accelerates a certain chemical reaction in the cell. The enzyme is continuously employed during the reaction and is not destroyed. Each enzyme molecule found in a cell is unique and tailored to a particular chemical reaction.

Proteins called enzymes assist our bodies' chemical reactions move forward more quickly. For several processes, including digestion and liver function, enzymes are crucial.

Health issues might result from having too much or too little of a specific enzyme. Healthcare professionals can also use the enzymes in our blood to look for injuries and illnesses.

Therefore, Enzymes can be reused because they do not permanently bond with substrate.

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According to the reading, the sun is NOT a typical star.
O True
O False

Answers

Flase


Done !!!!!!!!!!

Helpppppppppppppppppppppppppppppppppp

Answers

Answer:

umm i dont understand your question

Explanation:

How is earth like a system

Answers

Answer:

Earth is a dynamic planet; the continents, atmosphere, oceans, ice, and life ever-changing, ever interacting in myriad ways. These complex and interconnected processes comprise the Earth system, which forms the basis of the scientific research and space observation that we refer to as Earth system science.

Explanation:

Why are viruses considered nonliving but bacteria are considered living? Give two reasons.
Not a long life story but a simple two reasons.

Answers

Answer:

1-Viruses also lack the properties of living things: They have no energy metabolism, they do not grow, they produce no waste products, and they do not respond to stimuli.

2-They also don't reproduce independently but must replicate by invading living cells.

Viruses are considered non living since they are not made out of cells, they can't keep themselves in a stable state, they don't grow, and they can't make their own energy.

HURRY. Why is transcription said to be unidirectional?

Answers

Answer:

Transcription is unidirectional because you are copying only ONE side of the DNA. Remember that DNA is a double stranded helical structure. One strand of DNA is complementary to the other strand.

Explanation:

what is a cell that is the source of other cells

Answers

Answer:

stem cells

Explanation:

What order allows animals to get usable fuel from the sun? multiple chose
1.sun, consumer, producer
2.producer, consumer, sun
3.sun, producers, consumers
4.producers, sun, consumers

Answers

Answer:

3. Sun, producers, consumers

Explanation:

Energy from the sun shines upon a producer. The producer then photosynthesizes and converts the sun's energy into fuel for itself. If a consumer happens to eat the producer, it will absorb its energy.

3. sun, producers, consumers

Consumers eat producers, and producers use the sun to make food. Therefore, the easiest way for consumers to get fuel is through producers.

If the food on the island is small seeds, what finch is best adapted? Explain why

Answers

Answer:Adaptation in Darwins Finches. Beak depth, which is correlated with body size and the ability to crack larger seeds, varies according to drought conditions: plants produce fewer, harder seeds in dry years and more, softer seeds in wet years. Only larger birds with deeper depths survive in drought years.

Explanation:

How does evolution result in reproductive success?

Answers

Answer:

Often when species evolve, they receive a trait that may make them live longer or make it where their survival chances are significantly increased. Which in turn can make their offspring stronger and able to live longer, therefore increasing their population.

The simplest structures that can carry out all of the activities characteristic of life are:
A. cells.
B. atoms.
C. molecules.
D. crystals.

Answers

atoms as they are the simplest

Most stars seem to move across the night sky because
a. the universe is expanding
b.the universe is getting smaller
c. Earth is orbiting the Sun
d. Earth is spinning on its axis

Answers

I think it is C but uh if its not D Hope this helps-

Explanation: because

Which statement accurately describes runners?

A runner is a small underground stem that sprouts new buds.
A runner is a series of underground leaves that contain stored food.
A runner is a horizontal stem that grows along the ground.
A runner is a horizontal stem that grows underground.

Answers

Answer:

C✌

A runner is a small underground stem that sprouts new buds.

A runner is a series of underground leaves that contain stored food.

A runner is a horizontal stem that grows along the ground.<--THIS ONE

A runner is a horizontal stem that grows underground.

8. What is one similarity between human skeletal muscles and some bacteria?
A. Both carry out autotrophic nutrition when food becomes scarce in the environment,
B. Both produce lactic acid when oxygen is not available for respiration.
C. Both reproduce asexually, using binary fission and regeneration.
D. Both lack a nuclear membrane surrounding the chromosomes.

Answers

Answer: B

Explanation:

Human skeletal muscles and some bacteria both produce lactic acid when oxygen is not available for respiration, which is similar. The best choice is B.

What are skeletal muscles?

Skeletal muscles enable humans to move and perform daily activities. They are essential to breathing mechanics and help preserve balance and posture. They also protect the vital organs of the body.

Skeletal muscle fibers can be found in muscles that are attached to bones. They are consciously regulated and have a striated appearance.

Lack of oxygen causes both skeletal muscle and bacteria to produce lactic acid through respiration.

Since both produce lactic acid when oxygen isn't available for respiration, option B is the proper response.

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Sodium chloride can most likely be used successfully to melt ice in which
Canadian city?
A. Regina
B. Winnipeg
C. Toronto
D. Fort McMurray

Answers

Answer is C. Toronto

please help me!!!!!!!!!!!!!!!!!!!!!!​

Answers

Answer:Fungi are called saprophytes because they are the ones that depends on dead and debries for nutrition .

1. What is the function of the Circulatory/Cardiovascular System?

2. Why do you need to have blood circulate to all the parts of the body?

Answers

Answer:

1. Attires carry blood away from the heart and veins carry blood back to the heart. The circulatory system Carrie's oxygen, nutrients and hormones to cells, and removes waste products like carbon dioxide. These roadways travel in one direction only, to keep things going where they should

Answer:

Explanation:

So your body can function properly. Its what make our bodies work. It also supplies oxygen to the brain and other organs and promotes healthier skin

Which is held constant when a gas obeys Boyle's law?

A. motion
B. pressure
C. temperature
D. volume

Answers

Answer:

B

Explanation:

ganyan rin sagot ko sa module ko

When a gas obeys Boyle's law, the temperature is held constant. The correct option is C.

What is Boyle's law?

Boyle's law is given by Charles Boyle. It is a gas law that states the pressure decrease with the increase in the volume and the temperature remain constant. In other words, the pressure exerted on gas is inversely proportional to the volume of the gas.

The law shows the relationship between pressure and volume, with the temperature remaining constant. There are three gas laws which are given by different scientists. These laws show the relationship between two variables and the third remains constant. These variables are temperature, volume, and pressure.

Thus, the correct option is C. temperature regarding the gas obeys Boyle's law, and it remains constant.

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Can you tell me which go where?

Answers

Answer:

heredity goes to the first one

phenotype at the second one

Explanation:

Which objects have the most eccentric orbits?
A. Uranus and Neptune
B. Jupiter and Earth
C Saturn and Venus
D. Mercury and Pluto

Answers

Pluto and mercury is the correct answer
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