1. The answer to the research question is the...
A. Claim
B. Evidence
C. Reasoning

2.The scientific data used to prove your point is the...
A. Claim
B. Evidence
C. Reasoning

Answer:

The volume of the solution is 0.305 liters.

Explanation:

Molar mass is the amount of mass that a substance contains in one mole. The molar mass of K₂Cr₂O₇ is 294 g / mole. Then you can apply the following rule of three: if by definition of molar mass 294 grams of the compound are contained in 1 mole, 180 grams are contained in how many moles?

\(moles=\frac{180 grams*1mole}{294 grams}\)

moles= 0.61

Molarity is a measure of the concentration of a substance that is defined as the number of moles contained in a certain volume. So, the molarity of a solution is calculated by dividing the moles of the solute by the volume of the solution:

\(molarity=\frac{number of moles of solute}{volume}\)

Molarity is expressed in units \(\frac{moles}{liter}\).

In this case:

Replacing in the definition of molarity:

\(2 M=\frac{0.61 moles}{volume}\)

Solving:

\(volume=\frac{0.61 moles}{2 M}\)

volume= 0.305 liters

The volume of the solution is 0.305 liters.

Answer:

The fly cells must be compared with human cells

Explanation:

Dr. Gracia's aim is the development of a potential cancer treatment. Remember that the treatment is meant for human beings.

Usually, the pre-clinical trials of the treatment is carried out on other organisms and the success rate is evaluated before trial on humans.

If protein W has been effective on flies, its effect on human cells should also be diligently compared before conclusions are drawn regarding the therapeutic effects of protein W.

For a tetrahedral complex with four different monodentate ligands, there are two possible geometrical isomers: the cis isomer, where the identical ligands are adjacent to each other (i.e., either WX-ZY or WY-XZ), and the trans isomer, where the identical ligands are opposite to each other (i.e., either WX-YZ or WY-XZ).

Therefore, the number of geometric isomers for the [ZnWXYZ]2+ ion is two. It's worth noting that if any of the ligands were bidentate or polydentate, the number of isomers would be higher due to the possibility of different chelating modes.
In a tetrahedral [ZnWXYZ]2+ complex, there are no geometric isomers present. This is because a tetrahedral complex has a single symmetrical arrangement of the four monodentate ligands W, X, Y, and Z around the central metal ion Zn2+. Geometric isomerism arises when there are multiple possible arrangements of ligands around the metal ion, leading to distinct structures. However, in a tetrahedral complex, there is only one possible arrangement, and hence no geometric isomers can be formed.

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Answer:

See explanation

Explanation:

Microwaves work by flipping water molecules upside down, then right side up again, and so on at very high speeds, and the friction generates heat. Some glass or plastic isn't affected by the microwaves, so the molecules don't get flipped, and so no friction occurs and no heat is produced, leading to the dish not being heated up.

The joint in the human body which is similar to the chicken wing joint is elbow joint. There is some similarities in the arm joint movement of chicken and humans.

Joints are the connecting parts for bones. Thus two bones are connected by joints. The skeletal system is a web of different living tissues that gives the human body its structure and protects organs.

Additionally, it is where blood cells are created. Due to their similar evolutionary history as vertebrates, chicken wings are homologous to the upper limb of humans; that is, they share many of the same features.

In order to connect the shape of muscles, bones, and joints to their function, we can analyze a chicken wing. The structure, tissues and some movements of elbow joint of humans is similar to that of chicken wing joint.

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The kinetic molecular theory (KMT) is a model used to explain the behavior of gases based on the motion of their individual particles.

Let's analyze the given statements and determine which ones are not consistent with KMT:

1. "Gases consist of small particles called molecules or atoms that are in constant motion." - This statement is consistent with KMT. According to the theory, gases are made up of small particles (atoms or molecules) that are constantly moving and colliding with each other and the walls of their container.

2. "Gas particles are always attracted to each other." - This statement is not consistent with KMT. The theory assumes that gas particles have negligible attractive forces between them. Instead, it states that they only interact through collisions.

3. "Gas particles have definite shapes and volumes." - This statement is not consistent with KMT. According to KMT, gas particles do not have definite shapes or volumes. They take on the shape and volume of their container, as they are highly compressible and can fill the available space.

4. "The average kinetic energy of gas particles is directly proportional to their temperature." - This statement is consistent with KMT. KMT states that the average kinetic energy of gas particles is directly proportional to their temperature. As the temperature increases, the particles move faster and have higher kinetic energy.

In summary, the statements that are not consistent with KMT are:
2. "Gas particles are always attracted to each other."
3. "Gas particles have definite shapes and volumes."

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Answer: C

Explanation: none of the others make sense if you think about it

Concentration of Hydronium ions in the Acetic acid is \(1.58\times10^{-5}\)

Calculation of concentration of acid:

pH of a solution is defined by the concentration of Hydronium ions in the solution.

Also, pH is defined as the negative of logarithm of \(log[H^+]\)

\(pH= -log[H^+]\)

pH of Acetic acid= 4.8

Therefore,

\(4.8= -log[H^+]\)

Taking antilog, we get

\([H^+] = 0.0000158M= 1.58\times10^{-5}M\)

The Hydronium concentration of the acetic acid is \(1.58\times 10^{-5}\)M.

As Acetic acid is a weak acid which means that ionization of acid is not complete, ie. 100%

That is why the concentration of Hydronium ions are less in the solution.

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Explanation:

CH4 + 4S ---> CS2 + 2H2S

4) 0.75 mol S × (1 mol CS2/4 mol S) = 0.19 mol CS2

5) 3 mol H2S × (1 mol CH4/2 mol H2S) = 1.5 mol CH4

Fe2O3 + 2Al ---> 2Fe + Al2O3

6) 25 g FeO3 × (1 mol Fe2O3/159.69 g Fe2O3) = 0.16 mol Fe2O3

0.16 mol Fe2O3 × (2 mol Al/1 mol Fe2O3) = 0.32 mol Al

0.32 mol Al × (26.98 g Al/1 mol Al) = 8.6 g Al

7) Given:

45 g Al × (1 mol Al/26.98 g Al) = 1.6 mol Al

85 g Fe2O3 ×(1 mol Fe2O3/159.69 g Fe2O3)

= 0.53 mol Fe2O3

Let's look at how much Fe each reactant will produce:

1.6 mol Al × (2 mol Fe/2 mol Al) = 1.6 mol Fe

0.53 mol Fe2O3 × (2 mol Fe/1 mol Fe2O3) = 1.1 mol Fe

Note that the given amount of Fe2O3 will give us fewer Fe. Therefore, Fe2O3 is the limiting reactant.

8) Al will produce 1.6 mol Fe × (55.845 g Fe/1 mol Fe)

= 89 g Fe

Fe2O3 will produce 1.1 mol Fe × (55.845 Fr/1 mol Fe)

= 61 g Fe

9) Since Fe2O3 is the limiting reactant, the ideal yield of Fe for the reaction is 61 g. If the actual reaction only gave us 25 g Fe. then the percent yield of Fe is

%yield = (25 g Fe/61 g Fe) × 100% = 41%

10) If we only got 25 g Fe, then the amount of Al actually used in the reaction is

25 g Fe × (1 mol Fe/55.845 g Fe) = 0.45 mol Fe

0.45 mol Fe × (2 mol Al/2 mol Fe) = 0.45 mol Al

0.45 mol Al × (26.98 g Al/1 mol Al) = 12 g

Therefore, the leftover amount of Al is

25 g Al - 12 g Al = 13 g Al

Answer:

Explanation:

it should be more electro-negative  

than hydrogen and  it should be small sized atom  

The molecules who fulfill these needs are  

oxygen, nitrogen and fluorine.

The best that Genetic evidence can do is suggest that a certain person is more likely to have committed a crime than a stranger off the street. DNA results should not be the only piece of evidence used to prove guilt.

Tommie Lee Andrews became the first person in the United States to be convicted as a consequence of DNA evidence when he was found guilty in November 1987 and given a 22-year jail sentence based on both fingerprint analysis and DNA typing.

Because each person's DNA is unique and distinct from everyone else's, DNA is a significant tool for law enforcement investigations (except for identical twins). A crime lab can create a profile to be used in identifying a suspect by studying specific DNA sequences, or loci.

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Answer:

yes acid can nuetralize bases

Answer:

Yes!

Explanation:

Strong Acids neutralize Strong bases.

When they react, water is formed. Whatever ions are left over, they become salt.

There must be an equal moles of strong acid and strong base.

Answer:

B. A substance that is good at reducing another atom

Explanation:

Reducing agents:

Reducing agents reduced the other element are it self gets oxidized.  They have very low ionization energy and easily lose the electron.

Consider the following reactions.

4KI + 2CuCl₂  →   2CuI  + I₂  + 4KCl

the oxidation state of copper is changed from +2 to +1 so copper get reduced.  It means it gain one more electron.

CO + H₂O   →  CO₂ + H₂

the oxidation state of carbon is +2 on reactant  side and on product side it becomes  +4 so carbon get oxidized.  Carbon loses it two more electron and act as reducing agent.

Oxidizing agents:

Oxidizing agents oxidize the other elements and itself gets reduced.

Oxidation:

Oxidation involve the removal of electrons and oxidation state of atom of an element is increased.

Reduction:

Reduction involve the gain of electron and oxidation number is decreased.

Answer:

It is not a legitimate chemical name because the methyl group on carbon 1 increases the length of the carbon chain to seven carbon atoms thus making the parent compound heptane

Explanation:

Chemical compounds are named according to rules in the IUPAC nomenclature.

In naming organic compounds, parts of rules is to find out the parent or root compound. This is determined by finding out the longest carbon chain and then checking if it contains single or multiple bonds.  (that is if it is an alkane- with single bonds, alkene-with double bonds or an alkyne- with triple bonds)

From the question the parent or root name is an alkane containing 6 (Hex-) carbon atoms, while the methyl group is  substituent

(CH₃)-CH₂-CH₂-CH₂-CH₂-CH-CH₃

However the alkyl substituent on carbon 1 increases the the length of the carbon chain to 7 (Hept-) instead of 6. Hence the correct IUPAC nomenclature is heptane and not 1-methylhexane.

The three alkenes using systematic names are:Ethene ,Propene,Butene

1. Ethene (also known as ethylene) - with the molecular formula C2H4, it has a double bond between the two carbon atoms and is commonly used in the production of plastics, fibers, and chemicals.
2. Propene (also known as propylene) - with the molecular formula C3H6, it has a double bond between the second and third carbon atoms and is used in the production of plastics, synthetic rubber, and gasoline.
3. Butene - with the molecular formula C4H8, there are four isomers of butene that differ in the placement of the double bond. The three alkenes using systematic names are:Ethene ,Propene,Butene They are named 1-butene, 2-butene, cis-2-butene, and trans-2-butene. Butenes are used in the production of plastics, synthetic rubber, and solvents.

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Propanal will form silver mirror upon heating with Tollen's reagent while propanoic acid will not respond.

Answer:

air, water, sunlight

Explanation:

A limiting factor may be defined as a environmental condition or a resource that can limit the plant growth as well as distribution or the abundance of an organism or its population within the ecosystem. The ability  of any plant species to grow and spread throughout any geographic area is the direct result of the adaption to its biotic  and abiotic components of that region.

Some of the factor that affect the plant growth are : sunlight, air, proper temperature, moisture, nutrients, wind,etc.

The lack of the any one of the above essential component will determine the health of the  plant.

Answer:

it is always being pulled toward the sun by gravity.

Explanation:

Answer:

it is always being pulled by the sun

Explanation:

Answer:

chemical

Explanation:

I believe it is a chemical property. Mark brainliest if this helps!

Yeast is a type of fungus that can ferment certain substances, meaning it breaks down sugars and converts them into alcohol and carbon dioxide. The ease with which a substance is fermented by yeast depends on a few factors, including the type of yeast being used and the composition of the substance itself.

Generally speaking, substances that contain a high amount of simple sugars are more easily fermented by yeast. This is because yeast is able to quickly and efficiently break down these sugars into alcohol and carbon dioxide. Examples of substances that are easily fermented by yeast include fruit juices, honey, and molasses.

On the other hand, substances that are more complex or contain less sugar may be more difficult for yeast to ferment. For example, yeast may have a harder time breaking down starches, such as those found in grains, without additional processing steps.

It's worth noting that different strains of yeast may also have varying levels of ability to ferment certain substances. Some strains may be better suited for fermenting certain types of beer or wine, for example, while others may be more effective at fermenting bread dough.

Overall, the ease with which a substance is fermented by yeast depends on a variety of factors, and may require some trial and error to determine the best approach for a particular substance.

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It is true that 1,3-butadiene has the chemical formula C4H6 and is a conjugated diene. A popular monomer in the creation of synthetic rubber, polymers, and resins, it is a colourless, flammable gas.

A conjugated diene with the chemical formula C4H6 is 1,3-butadiene. A popular monomer in the creation of synthetic rubber, polymers, and resins, it is a colourless, flammable gas. Because of the butadiene's conjugated double bond system, pi-electrons are delocalized over the whole molecule, giving it special characteristics including high reactivity, a low boiling point, and a propensity for addition reactions. Butadiene is a crucial industrial chemical that is created by the catalytic dehydrogenation of butene or butane. It finds usage in a variety of petrochemical, polymer, and automotive applications.

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Answer:

True

Explanation:

Heat is the transfer of thermal energy from a system to its surroundings or from one object to another. This transfer of energy is from the object at a higher temperature to the object at a lower temperature.

Ketoses such as fructose are expected to give a positive Tollens test because of their ability to reduce Tollens' reagent.

The Tollens test is a chemical reaction used to test for the presence of aldehydes. The test is named after the German chemist Bernhard Tollens. The Tollens reagent is a solution of ammoniacal silver nitrate, Ag(NH3)2NO3. The test is based on the fact that aldehydes are readily oxidized to carboxylic acids by a solution of silver nitrate in ammonia.

This reaction is exothermic and produces a silver mirror on the inside of the test tube.The test solution is prepared by adding a few drops of a solution of Tollens' reagent to the substance being tested. The test solution is then heated in a water bath for a few minutes.

If the substance being tested is an aldehyde, it will reduce the silver ions in the Tollens' reagent to metallic silver. The metallic silver will form a mirror on the inside of the test tube. If the substance being tested is not an aldehyde, no mirror will form.The aldehydes are more easily oxidized than the ketoses.

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Answer:

dense

Explanation:

Answer: dense

Explanation:

Large particles usually get smaller as a result of surface reactions. Both heating and freezing effects of tiny particles on the climate are seen.

Weathering can be classified as either physical or chemical. There is a wide variety in soil particle size due to variations in weathering processes.The overall surface area increases when the size is reduced more. This is significant since most chemical changes start at an object's surface.

The Earth's materials are the four major elements that make up the earth's crust. The earth is made up of minerals, rocks, soil, and water. Earth materials include the necessary building components for life, agriculture, and industry.

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Van der Waals forces. Van der Waals forces are very weak forces between two very close surfaces.

Forces of van der Waals. When two surfaces are very close to one another, van der Waals forces are very weak.

In gases, liquefied and solidified gases, and nearly all organic liquids and solids, neutral molecules are drawn to one another by van der Waals forces, which are relatively weak electric forces.

Van der Waals interactions are nonionic forces that have a comparatively low energy of 0.5 to 1 kcal/mol.

The covalent link from its less electronegative Neighbour atom tends to drive the electron cloud toward neutral molecules with electronegative atoms like oxygen and nitrogen.

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Answer:

A

Explanation: