Please I would like some help. Will give brainliest for correct answer.

Please I Would Like Some Help. Will Give Brainliest For Correct Answer.

Answers

Answer 1

Answer

D

Explanation

The conservation of mass principle says that whatever you do to a chemical, the mass of the reactants must equal the mass of the products.

There is a loss somewhere that has not been accounted for.The ribbon and oxygen add up to 6.95 which means that the reactants (oxygen and Magnesium ribbon) added up to more than the mass of the product.

The product was only 6.53 grams. Why that  is so is another matter and how they measured the oxygen is still yet something else.

A is wrong. The mass of Mg was measured, it was not calculated.

B is wrong.  The experiment really depends on moles not raw mass (which is measured and then converted to mass.)

C is wrong. They are not equal. The products are a little less than the mass of the reactants added together. They do not differ by much, but they do differ.


Related Questions

what is the job of the kidneys

Answers

Answer:

Top 5 Jobs Kidneys Do:

1. Remove wastes and extra fluid

2. Control blood pressure

3. Make red blood cells

4. Keep bones healthy

5. Control pH Levels.

Explanation:

Pls Brainliest

Why do you think pressurized seeds and spores are beneficial adaptation for these plants and fungi

Answers

The pressurized seeds and spores have the ability to spread, helping the organism reproduce. In plants, it allows them to reduce competition by flinging the seeds far away so that their offspring don’t compete for resources. For the fungus, it allows the parent to fling the spores into the grass so that when the horse eats them, the life cycle of the fungus continues.




If a molecule’s concentration outside the cell is higher than it is inside the cell , that solution is??

Answers

Them the solution is hypertonic. This means that the water within the cell would exit it and go outside and the cell would shrink.

Plants make sugars in the presence of sunlight in a process called photosynthesis. What form of carbon do the plants take in for this process?

Answers

Plants take in Carbon Dioxide during the process of photosynthesis.

Hope this helps!! :)

Plants make sugars in the presence of sunlight in a process called photosynthesis, and plants take in carbon dioxide ([tex]CO_2[/tex]) from the atmosphere for the process of photosynthesis as described in Option A.

What is the role of carbon dioxide in photosynthesis?

During photosynthesis, plants use energy from sunlight to convert carbon dioxide and water into glucose and oxygen, and this process of photosynthesis can be divided into two main stages: the light-dependent reactions and the light-independent reactions. Light-dependent reactions take place in the thylakoid membranes of the chloroplasts and involve the absorption of light, but in light-independent reactions, carbon dioxide is fixed. Later, when carbon dioxide is fixed, glucose is also formed.

Hence, plants take in carbon dioxide ([tex]CO_2[/tex]) from the atmosphere for the process of photosynthesis as described in Option A.

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The question is incomplete, the complete question is below

Plants make sugars in the presence of sunlight in a process called photosynthesis. What form of carbon do the plants take in for this process?

A)Atmospheric carbon dioxide

B)no carbon dioxide is used

DNA replication is an important part of cellular division because correct replication
A) ensures that identical and complete genetic information is passed to both daughter cells.
B) produces mutations that usually are advantageous for the survival of the organism.
C) combines sperm and egg to form a zygote that will develop into a new organism.
D) communicates information about the cellular environment to adjacent cells.

Answers

The answer would be a.ensures that identical and complete genetic information is passed on to both daughter cells

DNA replication is an important part of cellular division because correct replication ensures that identical and complete genetic information is passed to both daughter cells. The correct option is a.

What is DNA replication?

DNA replication is the physiological method that generates two identical replicas of DNA from a single original DNA molecule in molecular biology.

DNA replication occurs in all living life forms and is the most important component of biological inheritance.

Each DNA molecule is made up one strand of the original DNA molecule and one strand that has been synthesized (created). As a result, DNA replication is referred to as semiconservative.

DNA includes the instructions that an organism requires to develop, survive, and reproduce. Before cells can divide, their DNA must be replicated.

This ensures that each daughter cell receives a copy of the genome, resulting in successful genetic trait inheritance. DNA replication is an essential process that is conserved across all organisms.

Thus, the correct option is a.

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A student hypothesizes that placing blood cells in high concentrations of salt water will cause them to grow and eventually lyse, or burst. He performed an experiment in which he submerged blood cells in various concentrations of salt water and recorded his results in the table below.

Answers

No; the cells shrink with increasing salinity.


Hope this helps!

Answer:

No; the cells shrink with increasing salinity.

Explanation:

I did the study island

Complete the following analogy:

eukaryotic: mitosis: prokaryote:

Answers

Eukaryotic: mitosis: prokaryote: binary fission

Eukaryotic cells reproduce by mitosis while prokaryotes reproduce by binary fission.

Eukaryotes include fungi, plants, and animals and are complex in structure. They have a nucleus, several organelles and more DNA (deoxyribonucleic acid). Eukaryotic cells undergo mitosis; a form of cell division that usually produces two similar daughter cells with the same genetic component as the parent cell. Prokaryotes include bacteria, and archaea, and are quite simple in structure. They do not have organelles or nucleus, but they have only a small amount of DNA. Prokaryotes undergo binary fission; a type of asexual reproduction in which there is replication and segregation of a single DNA molecule.


What happens first when a star begins to run out of fuel
A)The stars core shrinks

B) The star becomes a black hole

C) The star becomes a white dwarf

D) The stars outer layer drifts away

Answers

A) The stars core shrinks
The star will contract under the weight of gravity.
When it contracts it will heat up and expand to a red giant.
When the star runs out completly of helium it would emit gasses and form a star nebula.
It would then become a white dwarf then into a black dwarf.
Final answer:

When a star begins to run out of fuel, the first thing that happens is the shrinking of its core. The core collapses inward due to the lack of energy to counteract gravitational forces. Eventually, this leads to the formation of a white dwarf.

(option c)

Explanation:

The first thing that happens when a star begins to run out of fuel is that the star's core shrinks. As the core runs out of fuel, it can no longer produce enough energy to counteract the gravitational forces, causing it to collapse inward. This collapse leads to the core becoming denser and hotter.

Eventually, the shrinking core may trigger a fusion reaction in the surrounding helium shell, generating a new flow of energy. However, for low-mass stars, the core lacks the mass and temperature to initiate another round of fusion, so the core continues to shrink.

At extreme densities, a new behavior of matter, governed by quantum physics, comes into play. This behavior helps the star achieve a final state of equilibrium, resulting in the formation of a white dwarf.

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When a plant cell is placed in salt water, the cell is affected and changes size. What part of the cell will be unaffected?

A)The Cell Wall
B)The Vacuole
C)The Cytoplasm
D)The Cell Membrane

Answers

Your answer is A~Cell Wall

Final answer:

The part of the cell that will remain unaffected when a plant cell is placed in salt water is the Cell Wall.

Explanation:

When a plant cell is placed in salt water, the part of the cell that will be unaffected is The Cell Wall. The cell wall is a rigid structure made of cellulose and is responsible for providing support and protection to the cell. Salt water doesn't directly affect the cell wall, but it affects other parts of the cell, causing it to shrink or expand.

When a plant cell is placed in salt water, water molecules move out of the cell due to osmosis, causing the cell to shrink. This happens because the concentration of salt outside the cell is higher than inside the cell, creating a hypertonic environment. The cell membrane, cytoplasm, and vacuole are all affected by the movement of water molecules and can change in size.

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Which describe weathering? Check all that apply.
creates sediment
breaks down rock
causes heating and cooling
uses Earth’s natural processes
carries away fragments

Answers

Breaks down rock and carries away fragments

Which describe weathering? Check all that apply.

Weathering means the materials like rocks, soil, woods, etc they break down in due course of time due to certain atmospheric conditions and many other biological factors.

So, according to this definition, we can say that the correct options are -

- creates sediment

- breaks down rock

- carries away fragments

Select all that apply.

Which of the following properties of carbon give it particular importance to life?

It's very cohesive and adhesive.
It can form polymers like carbohydrates, lipids, proteins, and nucleic acids.
It can regulate temperature.
Decomposition of molecules can occur readily, releasing needed energy.

Answers

I believe the answer is it can form polymers like carbs, lipids, proteins, and nucleic acids.

Answer: It can form polymers like carbohydrates, lipids, proteins, and nucleic acids.

Explanation:

The carbon is an important element which forms an important ingredient of the bio molecules like carbohydrates, lipids, proteins these are the important components of the food. The lipids form the main part of the cell membranes which selectively restricts and allow the passage of the molecules and ions in and out of the cells. The proteins are the building blocks of life they perform functions in cell metabolism. The nucleic acid includes the genetic material which is inherited by the offsprings from their parents. All these bio-molecules are necessary for the survival of the living organisms.

roosters have genes that determine feather length. which term describes the form of a gene that produces a specific trait, such as long feathers or short feathers? a. allele. b. dna. c. chromatic. d. gamete

Answers

Allele.  

-An allele is a form of a gene that determines a specific trait.  

-dd.  

-Traits are passed in discrete units from parent to offspring.  

-He collected detailed information on inherited traits of pea plants.

Hope this helps

The operative unit of hereditary is called genes. Genes are made of DNA and they act as a messenger to make protein for cell structure and functioning.

The correct answer is:

Option A.  Allele

This can be explained as:

An alternative form of a gene is called an allele it defines a specific trait.

These traits get carried from parents to their offspring in a discrete assemblage.

DNA is biochemical carrying the genetic data to be coded.

While gametes are the reproductive cells of the female and males.

Therefore, alleles are the form of genes that determines a specific type of trait.

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how does your body respond to loud noises? is this an internal or external stimulus?

Answers

Answer:

I know this is really late but loud noises are an external stimulus and your body responds by usually covering your ears or if it is sudden you react by jumping or something.

Explanation:

Final answer:

In response to loud noises, an external stimulus, the body's auditory system processes sound waves which results in auditory neural signals being sent to the brain. The intensity of the sound affects the magnitude of this response. If the sound is too intense, it can potentially harm the auditory system and lead to hearing loss.

Explanation:

When your body responds to loud noises, it's reacting to an external stimulus. Sound waves or auditory stimuli act on the outer ear (pinna, canal, tympanum). These waves cause vibrations, and the tympanum then sends that energy to the middle ear. From there, the middle ear bones shift, and the stapes transfers the mechanical energy to the oval window of the inner ear (cochlea). Once inside the cochlea, the energy creates a shift in the basilar membrane, thereby bending the stereocilia on the receptor hair cells. This process activates the receptors, which transmit auditory neural signals to the brain, producing the perception of sound. It's clear to see this process is affected by the sound intensity; if the intensity is too high, it could lead to disruptions in hearing, or even hearing loss.

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what happens after transcription ends

Answers

This is a description of the notations that appear at the end of the official transcript.

Which of these are sources of lake water ? select the three correct answers

A. Ocean waves
B. Groundwater
C. Rain runoff
D. Melting snow

Answers

Answer:

B. C. and D.

Explanation:

apex

The sources of lake water include ocean waves, ground water, and rain runoff. Thus, the correct options are A, B, and C.

What is lake water?

A lake is a water body which is surrounded by land from all the sides. They are found in mountains, deserts, plain areas and in seashores. The water in the lakes comes from rain, snow, melting ice, streams, and groundwater. Mostly lakes contain freshwater.

Water from the rain runoff flows through various paths and collects into lakes. It carries various types of small leaves or soil particles which along with it enters into the lake.

The ground water can also form lakes and is the main source of freshwater. The melting snow is also a source of fresh water that flows and enters the nearby ponds and lakes that are present in the nearby areas.

Therefore, the correct options are A, B, and C.

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which is an example of artificial selection

-two male wild turkeys fight. The weaker one is killed. The winner mates with all the females

- A farmer crosses two kinds of corn. He produces a new, better tasting type of corn

-a flood drowns most of the lizards in an area. Only lizards that can swim live to reproduce

Answers

A because artificial means man made kinda like say "artificial honey" is in this drink

A farmer crosses two kinds of corn. He produces a new, better tasting type of corn       is the answer

A solution at a pH of 10 contains how many times more hydrogen ions than a solution at a pH of 7?​



Answers

Each one pH increase is 10x less hydrogen ions and 10x more hydroxide ion, so a pH of 10 is 10^3 = 1000x less hydrogen atoms and 1000x more hydroxide ions than a pH of 7.

An organism that uses energy to produce its own food supply from inorganic compounds is called

Answers

issa AUTOTROPH

____________________________________________________________________

Sometimes u should look up the question u might find the answer that wayu you could save some point 4 when u really need em on  a hard question

Final answer:

An autotroph is an organism that can produce its own food from inorganic compounds using energy from sunlight or chemical reactions.

Explanation:

An organism that uses energy to produce its own food supply from inorganic compounds is called an autotroph. These producers are essential to ecosystems because they create organic molecules that all other organisms depend on for survival. There are two types of autotrophs: photoautotrophs, which use sunlight for energy, and chemoautotrophs, which gain energy from chemical reactions.

Name three characteristics of gas giants that make them different from terrestrial planets.

Answers

Unlike terrestrial planets whose composition is rocky, gas giants have a mostly gaseous composition, such as hydrogen and helium. They do have some rocky material, although this is most often found in the planet core. Terrestrial planets are generally relatively small while gas giants are instead very large. (Historical researcher, D. Vogt stated that the lightest gas giant in the solar system is fourteen times the mass of the heaviest terrestrial planet, Earth.)

Gas giants are different from terrestrial planets in terms of composition, size and mass, and atmosphere characteristics.

Gas giants differ from terrestrial planets in several key ways:

Composition: Gas giants are primarily made of hydrogen and helium gases, while terrestrial planets have rocky cores surrounded by mantles of rock and metal.Size and Mass: Gas giants are significantly larger and more massive than terrestrial planets, with over 1,000 Earths being able to fit inside Jupiter.Atmosphere and Surface: Gas giants lack solid surfaces and have thick atmospheres with strong winds, creating storms and distinct features like Jupiter's Great Red Spot and Neptune's Great Dark Spot.

Therefore, gas giants differ from terrestrial planets by composition (mostly hydrogen and helium), lack of solid surfaces, and being significantly larger and more massive.

hey can some one give me information about the guy that discovered carbon

Answers

Joseph Black, born in 16 April 1728 in Bordeaux, France.

Known for his discoveries of magnesium, latent heat, specific heat, and carbon dioxide.

Where does the sea-floor spreading take place? A. Convergent boundaries B. Transform boundaries C. Oceanic volcanoes D. Mid-ocean ridges

Answers

Its Mid-ocean ridges so D

The correct option is D. mid-ocean ridges. Sea-floor spreading occurs at mid-ocean ridges, where two tectonic plates are moving apart.

These are underwater mountain ranges formed by divergent plate boundaries, where two tectonic plates are moving apart. As the plates separate, magma rises from beneath the Earth's crust to create new oceanic crust, which gradually pushes the older crust away from the ridge, leading to the expansion of the ocean floor.

When one DNA molecule is replicated, the result is two DNA molecules. What is true of the second DNA molecule? A. It is identical or nearly identical to the first DNA molecule. B. The sequence of bases, from top to bottom, is opposite the sequence in the first DNA molecule. C. It is half the size of the first DNA molecule. D. It is twice the size of the first DNA molecule.

Answers

It is identical or nearly identical to the first DNA molecule.

Answer: it is identical or nearly identical to the first DNA molecule.

Explanation: The process of DNA replication results in an exact copy of the original DNA molecule. This process occurs once in the life-cycle of a cell, allowing the cell to divide into two cells with identical DNA copies. Rarely, a mistake occurs during some part of the process. These mistakes are called mutations, and will result in a slightly different strand of DNA.

"Nodes of Ranvier" in a sentence.

Definition: Gaps between the myelin sheath where sodium and potassium ions pass through during an action potential. Location where “electrical” conduction takes place.

(pls make it not sound like a googled sentence)

Answers

a hole happening at consistent interims between portions of myelin sheath along a nerve axon.

The Nodes of Ranvier are gaps in the myelin sheath that contain ion channels, allowing for rapid nerve impulse transmission via saltatory conduction.

The Nodes of Ranvier are essential anatomical features in the nervous system of many animals, including humans. They are regularly spaced gaps between sections of the myelin sheath that encase axons. Within these gaps, voltage-gated sodium (Na+) and potassium (K+) channels are found, which are crucial for the propagation of action potentials. As a result, nerve impulses can 'jump' from one node to the next along the axon, which expedites the transmission of electrical signals. This process is known as saltatory conduction and it greatly increases the speed at which nerve impulses travel.

Thyroid gland and prostate gland are located at?

Answers

The anterior part of the lower neck, below the larynx (voice box).

Thyroid gland in the neck region at the base if larynx.
Prostate glass is located at the base of urinary bladder.

what is a community of organisms and their enviornment

Answers

A community of organisms and their environment is called an ecosystem.

it is called ecosystem

ddt is stored in body fat and remains toxic for many years. explain why these characteristics are undesirable in a pesticide. what characteristics would you want in a pesticide to make it less harmful to non pest organisms?

Answers

The application of DDT as a pesticide result in the storage of the substance in the fats of an organism's body and thus remains toxic for several years. This may cause issues in animals and may ultimately reach all the other species in the food chain.  

So, in order to make a less harmful pesticide, one would need the features, which would make the pesticide to only influence the pests, and would also want it to function more promptly. A pesticide is less harmful if it monitors what one wants to control and does not affect other organisms in the surrounding.  

A less harmful pesticide would only monitor aphids, gypsy moths, or nuisance wasps, but would not kill honey bees, butterflies, praying mantis, or ladybugs. The pesticides, which would not remain in the environment are generally less harmful, in comparison to those that remain in the water, soil, or air for a longer duration.  


Final answer:

DDT's fat solubility and persistence in the environment cause bioaccumulation and biomagnification, harming non-pest organisms. A harmless pesticide should be biodegradable, non-toxic to non-target organisms, and pest-specific. Fungal insecticides can be a good alternative.

Explanation:

The attributes of DDT (Dichloro-diphenyl-trichloroethane) being fat soluble and long-lasting are undesirable in a pesticide because they lead to bioaccumulation and biomagnification in the ecosystem, causing harm to non-pest organisms. This happens as DDT is absorbed and stored in the fat tissues of organisms, and its concentration increases up the food chain causing harmful effects on top predators such as eagles, which experienced thinning of eggshells that led to population decreases.

Ideally, a less harmful pesticide should be biodegradable, non-toxic to non-target organisms, and specific to the pest it is meant to control. It should also not accumulate in the bodies of organisms or in the environment.

Alternative solutions such as fungal insecticides can be considered. Fungal insecticides are usually non-toxic to humans and can kill a wider variety of insects than a chemical pesticide, and even eliminate plant pathogens.

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Natural selection is an example of a mechanism of ed evolution. Does this mechanism produce a change in individuals or populations? Explain !

Answers

Allele frequencies in a population may change due to four fundamental forces of evolution: Natural Selection, Genetic Drift, Mutations and Gene Flow. ... Two of the most relevant mechanisms of evolutionary change are: Natural Selection and Genetic Drift.

Approximately 60% of human genes are also found in fruit flies. About 97.5% of human genes are also found in mice. What does this evidence suggest? A. Fruit flies have had more mutations and recombinations during their evolution than mice. B. Mice have had more mutations and recombinations during their evolution than fruit flies. C. Humans and mice share a more recent common ancestor than do humans and fruit flies. D. Mice and fruit flies share a more recent common ancestor with each other than with humans.

Answers

The correct answer is option C. Humans and mice share a more recent common ancestor than do humans and fruit flies.

The molecular basis of the evolution says that the organisms, which have more similar genes and genetic sequence are more likely to have same most common ancestor. In this case, the similarity between the mice and the humans are more common as compared to the humans and the fruit flies. So, the human and the mice share more recent common ancestors.

Answer:

C

Explanation:

Based on this isotherm map in what direction would you head from New York State to find warmer temperatures

Answers

An isotherm refers to a line associating locations with equivalent temperatures. The isotherm maps demonstrate that where the temperatures are comparatively low and high, and also where temperature modifications are dramatic or gradual over a distance. The isotherms are demonstrated with curved lines or in colored bands associating the temperatures.  

In the given case, one should go towards the South-West direction of the map to find a warmer temperature as the isothermal line of the highest temperature, that is, of 68 degree F directs towards the South-West.  


Final answer:

In the US, you would generally head south from New York State to find warmer temperatures, due to the Earth's tilt causing the sun's rays to heat the equatorial regions more intensely.

Explanation:

Without an actual isotherm map provided for reference, it's difficult to give a precise direction. However, generally, greater warm temperatures in the United States are found as you head southwards. This is based on the idea that temperature tends to rise as we move towards the equator. For example, moving from New York State towards Florida would generally involve encountering progressively warmer temperatures. This is due to the earth's tilt creating a direct path for the sun's rays to the equator than the poles, heating these areas more intensely.

The direction of heat transfer from hot to cold also supports this concept, mirroring the general tendency of warm air to rise and move towards cooler regions. These concepts of heat transfer and geographic temperature distributions are fundamental elements of thermodynamics and climatology. Secondly, other physical factors could affect the temperature such as altitude, ocean currents, and topography.

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The information from messenger RNA is used to create polypeptide sequences during what process?

Answers

Answer

The translation process activates to create polypeptide sequences.

Explanation

When the messenger RNA gets information (codon) from the DNA, it comes toward the ribosomes where transfer RNA also attached. At the ribosomes, the transfer RNA decodes the information of messenger RNA as match its anticodons with codons of messenger RNA. (Nucleotides as A with U and C with G). This process of decoding at the ribosomes with the help of transfer RNA called the translation process which ultimately leads the process toward releasing of long chain peptide.

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