if two substance are moving with same speed ?why chromatography is not suitable?​

Answer:

The answer is

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

From the question

volume of silver = 0.25 cm³

density = 10.5 g/cm³

The mass is

mass = 10.5 × 0.25 = 2.625

We have the final answer as

Hope this helps you

The correct short-hand notation for the cell that will be studied in this experiment depends on the specific experimental setup and the desired electrochemical reaction. In the first given notation, Mg is the anode and Hg2+ is the cathode.

In the second given notation, Mg is still the anode but Cu2+ is the cathode. In the third given notation, Cu is the anode and Mg2+ is the cathode. In the fourth given notation, Hg is the anode and Mg2+ is the cathode. To determine the correct notation, specific experimental conditions must be considered, including the type and concentration of electrolyte solutions, temperature, and the desired direction of electron flow. It is important to note that the short-hand notation is a simplified representation of the electrochemical cell and may not capture all aspects of the reaction. In general, the short-hand notation is written with the anode on the left and the cathode on the right, separated by double vertical bars indicating a salt bridge or other ion-permeable barrier. The electrode materials and their respective ions are written as half-reactions with the anode on the left and the cathode on the right, separated by single vertical bars.

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Answer: I do believe it shows variables.

Explanation:

The energetic advantage of coupling exergonic and endergonic reactions lies in the ability to utilize the energy from exergonic reactions to drive energetically unfavorable processes and maintain the overall energy flow within biological systems.

Coupling exergonic reactions to endergonic reactions is a thermodynamic strategy used by living organisms to drive energetically unfavorable processes. In this coupling, the energy released from an exergonic reaction (which releases energy) is utilized to fuel an endergonic reaction (which requires energy).

The energetic advantage of coupling these reactions lies in the ability to use the energy released by exergonic reactions to power cellular processes that would not occur spontaneously otherwise. By harnessing the energy from exergonic reactions, cells can perform tasks such as active transport, synthesis of macromolecules, and muscle contraction.

To enable this coupling, it is important that the overall change in free energy (ΔG) for the coupled reactions is negative, indicating a spontaneous process. The magnitude of ΔG determines the feasibility and direction of a reaction.

For the coupling to be thermodynamically favorable, the exergonic reaction must have a larger magnitude of energetic release than the endergonic reaction requires. In other words, the exergonic reaction should have a more negative ΔG value compared to the positive ΔG of the endergonic reaction.

By having a larger exergonic reaction driving a smaller endergonic reaction, the overall system maintains a negative ΔG, allowing the coupled reactions to proceed spontaneously. This enables the cell to utilize the energy released from exergonic reactions to fuel essential processes that require energy.

Overall, the energetic advantage of coupling exergonic and endergonic reactions lies in the ability to utilize the energy from exergonic reactions to drive energetically unfavorable processes and maintain the overall energy flow within biological systems.

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1.  Consider the reaction: 5 A + 3 B → 2 C The rate of the reaction is found to be 0.0486 M/s. Then, The rate of change of B is 0.01215 M/min.

2.  For the following zero order reaction, the rate constant is 0.0311.

If [A₀] = 8.68, calculate [A] at 2.9 seconds. Then, [A] = 8.66445 ≈ 8.7.

(1) For Reaction : 5A + 3B → 2C

R₁ : 0.080486 M/s = K[A][B]²          ---------------------- (1)

When half of the B has reacted, then,

⇒ R₂ = k[A][B/2]                   -------------------------- (2)

Dividing (2) and (1), we get:

   R₂÷ R₁ = K[A] [B/2] ÷ K[A] /[B]

⇒  R₂÷ R₁ = B²/4 ÷ B²

⇒ R₂÷ R₁ = 1/4

Therefore,

R₁ /4 = 0.0486/ 4

        = 0.01215 M/minute.

Therefore,

Consider the reaction: 5 A + 3 B → 2 C The rate of the reaction is found to be 0.0486 M/s. Then, The rate of change of B is 0.01215 M/min.

(2) For a Zero Order reaction:

t = K[A₀] [A] ÷ K               ------------------------- (1)

Given that:

t = 2.9 Second

and, k = 0.0311

Converting Seconds into minutes:

t = 2.9 second = 0.048 Minutes ≈ 0.5 Minutes.

Putting the values in equation (1)

⇒ 0.5 = 8.68 - [A] ÷ 0.0311

⇒ 0.5 × 0.0311 = 8.68 - [A]

⇒ 0.01565 - 8.68 = - [A]

⇒ [A] = 8.66445

Therefore, [A] = 8.66445 ≈ 8.7

Based on the zero order reaction, the rate constant is 0.0311. If [A]0 = 8.68, calculate [A] at 2.9 seconds. Then, [A] = 8.7

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Half life, as stated, is a measurement of the rate at which radioactive material decays.

This process can be artificially produced by people, such as within a nuclear reactor, but can also occur spontaneously in nature. Depending on the particles or energy generated during the reaction, there are many kinds of radioactivity. Alpha particles, beta particles, and gamma rays are the three categories.

Average and half-life are two characteristics that may be used to describe the decay constant. Moments are used as the measuring unit in both scenarios. The average lifespan of such an element, as indicated by its name, may be expressed in the form of the following affirmation:

Nt=N₀ * e^(−λt).

The duration of time that is defined by how long it takes for half of a material to degrade is known as its half-life (both radioactive and non-radioactive elements). All through process of decay, its rate of decay is constant. It may be seen by:

Nt=N₀* (1/2)^(t/t₁₂).

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Answer:

D. Because they lose electrons

Explanation:

In neutral state the numbers of proton (+) = numbers of electrons (-)

if there are less electrons, there will be more protons than electrons => positive charge

if there are more electrons, there will be more electrons than protons => negative charge

:A 40kg girl is pushing a 40kg boy in a 20kg toy wagon....the wagon is moving at a constant speed of 2.0m/s. Calculate the combined kinetic energy of the boy and wagon.

answer:120J

hope this helped

Answer:

The car has an acceleration of 9.5m/s²

Explanation:

Since:

a= change in velocity / change in time

a= 95m/s / 10s = 9.5 m/s²

Answer:

A. Smaller, Larger

Explanation:

Every object that has mass obeys the Law of Universal Gravitation. Everything attracts everything else. The same gravity that keeps us down on the ground keeps planets in orbit. However, in space, the smaller object will feel the pull of the larger one much more strongly, which is why it will begin to orbit it

Answer

A

Explanation

letter a kase tama

The ideal gas law, which relates the pressure, volume, temperature, and number of moles of an ideal gas, can be applied to real-world situations. By considering a specific scenario and applying the ideal gas law, we can analyze the behavior of gases and make predictions about their properties.

Let's consider a situation where a scuba diver is exploring underwater at a depth of 30 meters. We can apply the ideal gas law, specifically the form known as Boyle's law, which states that the pressure and volume of a gas are inversely proportional at constant temperature.

Question: How does the pressure of the gas in the scuba tank change as the diver descends to a depth of 30 meters, assuming the temperature remains constant?

To answer this question, we can use the ideal gas law equation PV = nRT, where P is the pressure, V is the volume, n is the number of moles of gas, R is the ideal gas constant, and T is the temperature. By keeping the temperature constant, we can observe the relationship between pressure and volume as the diver descends and calculate the change in pressure based on the change in volume.

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Both methods have their own strengths and weaknesses, the FEM is often preferred over the spectral method for its flexibility, accuracy, and efficiency.

The finite element method (FEM) and the spectral method are two commonly used numerical techniques for solving boundary value problems in engineering and science.

The FEM is more flexible than the spectral method, as it can handle complex geometries and boundary conditions. This is because the FEM discretizes the problem domain into small elements, which can be of arbitrary shape, allowing for a more flexible mesh generation.

The FEM is generally more accurate than the spectral method for problems with irregular solutions or non-periodic boundary conditions. This is because the FEM allows for a higher degree of freedom in the representation of the solution, while the spectral method typically has lower accuracy near boundaries or singularities.

The FEM can be more computationally efficient for large problems than the spectral method. This is because the FEM solves the problem locally for each element, allowing for parallel computing and optimized use of resources.

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--The given question is incorrect, the correct question is

"Discuss the advantages of the finite element method over the spectral method for solving boundary value problems."--

The chemical symbol is carbon, \(ZnO\) and the oxidizing agent and reducing agent \(\mathrm{Cr}(\mathrm{OH})_3\) in the given reactions.

The reaction is \(\mathrm{ZnO}+\mathrm{C}-\mathrm{Zn}+\mathrm{CO}_2\)

Here the oxidation state of carbon changes from zero to +4. So the element is carbon.

Oxidation means increase in the  oxidation state of the element.

The reaction is \(2 \mathrm{Cr}(\mathrm{OH}) _3+3 \mathrm{OCl}^{-}+4 \mathrm{OH}^{-} \rightarrow 2 \mathrm{CrO}_2^{-}+3 \mathrm{Cl}^{-}+5 \mathrm{H} _2 \mathrm{O}_2\)

Here the oxidation state of oxygen decreases from +2 to +1 so it is reduced in the reaction.

The reaction is as follows;

\(\mathrm{ZnO}+\mathrm{C} \rightarrow \mathrm{Zn}+\mathrm{CO} _4\)

An oxidising agent is the one which reduces itself and oxidizes others in a reaction.

Here \(ZnO\) acts as an oxidising agent

A reducing agent is the one which oxidizes itself and reduces others in a reaction.

The reaction is as follows;

\($2 \mathrm{Cr}(\mathrm{OH}) _3+3 \mathrm{OCl}^{-}+4 \mathrm{OH}^{-} \rightarrow 2 \mathrm{CrO}_{2}^{-}^{-}+3 \mathrm{Cl}^{-}+5 \mathrm{H} _2 \mathrm{O}$\)

Here \(\mathrm{Cr}(\mathrm{OH})_3\) acts as a reducing agent

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B:Fluid Flow because fluid flow is how convection heat is transfered

Photochemical oxidants are examples of secondary pollutants.

Photochemical oxidants are secondary pollutants as they are formed in the atmosphere due to the combination of primary pollutants, such as nitrogen oxides and volatile organic compounds, with sunlight. These oxidants can cause smog, respiratory problems, and other environmental issues.

The other options mentioned in the question are: Aerosols, volatile organic compounds, combustion gases, and dust from soil erosion are examples of primary pollutants.Aerosols are solid or liquid particles that are suspended in the air. They can come from natural sources like dust or volcanic ash, or human-made sources like industrial emissions.

Volatile organic compounds (VOCs) are organic chemicals that easily evaporate into the air. They are emitted by many sources such as motor vehicles, industrial processes, and household products.Combustion gases are produced by the burning of fossil fuels or biomass. They can contribute to smog and other environmental problems.Dust from soil erosion is also a primary pollutant, which can cause respiratory problems and contribute to air pollution.

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Answer:

12cm^3

Explanation:

Just multiply each of the given dimension.

= 3.0 × 4.0 × 1.0

= 3 × 4 × 1

= 12

Answer:

12cm cubed

Just multiply 3, 4, and 1

Answer:

the red one

Explanation:

you can see in the picture

Noble gases in Group VIII have electron affinities that are close to zero because each atom has a stable octet and does not readily accept an electron.

Both electron affinity and electron negativity have a downward trend over time. The electron affinity is also 0 if the electron negativity is 0. Helium (He), Neon (Ne), Argon (Ar), Krypton (Kr), Xenon (Xe), Radon (Rn), and Oganesson are the elements with no affinity for electrons (Og). Affinities for electrons can be zero, negative, or positive. Noble gases in Group VIII have electron affinities that are close to zero because each atom has a stable octet and does not readily accept an electron. There is no tendency for noble or inert gases to gain an electron. Its electron affinity is therefore zero.

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Answer:

I think A and B

Explanation:

Answer:

A. & B.

Explanation:

Neither can be broken down into something besides an atom, the "purest" form matter can exist in. For example, if you were to break down C6H12O6 (glucose), you wouldn't be able to break down a singular atom of carbon into something different.

Answer:

diffusion is the movement of gases from a higher concentration area to a lower concentration area

osmosis is the movement of water molecules from a higher concentration area to a lower concentration area

According to the rule of conservation of mass, no atoms are created or destroyed during a chemical process. Instead, the atoms combine in a variety of ways to create goods.

According to the law of conservation of mass or principle of mass conservation, any system that is closed to all transfers of matter and energy must maintain a constant mass over time since the system's mass cannot vary and neither more nor less amount can be added or subtracted.

The law of conservation of mass, no atoms are created or destroyed during a chemical process. Instead, the atoms combine in a variety of ways to create goods. This is why each element has the same amount of atoms on both sides of an equation with balanced symbols.

Thus, According to the law of conservation of mass, mass is neither generated nor destroyed during a chemical process.

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Answer:

\(C{3}Cl{3}N{3}O{3}\\\)

Explanation:

Isocyanuric acid is C3H3N3O3.  The "trichloro" means that there are also 3 Cl atoms attached.  They likely replace the hydrogens, especially since the H's also form a single bond.  So replace the 3 H's with 3 Cl's:

              Isocyanuric Acid:  C3H3N3O3

Trichlioroisocyanuric acid:  C3Cl3N3O3

3C = 3*12 = 36

3Cl = 3*35.45 = 106.4

3N = 3*14 = 42

3O = 3*16 = 48

Total is 232.40 g/mole.  This matches the provided molar mass figure of 232.41 g/mole.

Answer:

b

Explanation:

Answer: OPTION B

Explanation:

Cells are generated from nonliving materials. Muscles in a kangaroo's legs work because of the cells that make up the muscle. The component of cell theory this best illustrate is: Cells are the basic unit of structure and function of all living things

Neomycin and Polymyxin B Sulfates and Hydrocortisone Otic Solution USP are a combination medicine. It is a prescription medication used to treat ear infections. It contains three active ingredients namely neomycin, polymyxin B sulfates, and hydrocortisone. The combination of these ingredients works together to relieve pain and treat the infection.

The antibiotic neomycin and polymyxin B work by destroying the bacteria that cause ear infections. Neomycin belongs to the class of antibiotics called aminoglycosides, and Polymyxin B belongs to the class of antibiotics called polymyxins. Hydrocortisone, on the other hand, is a corticosteroid used to reduce inflammation and pain in the ear.Neomycin, Polymyxin B Sulfates, and Hydrocortisone Otic Solution USP is used to treat bacterial infections that occur in the outer ear and ear canal. It is a prescription medication that is prescribed for adults and children who are above 6 years of age. The medication should not be used to treat viral or fungal infections. It should also not be used in patients with a perforated eardrum or those who are allergic to any of its ingredients.The medication should be used exactly as directed by the healthcare provider. The affected ear should be cleaned and dried before administering the medication. Then, gently shake the bottle and instill the drops into the ear canal. It is recommended to lie down for a few minutes to allow the medication to reach the infected area. Follow the healthcare provider's instructions for the duration of the medication. The medication should not be stopped early, even if the symptoms improve.

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Answer:

1.26666.....

Explanation:

Density is = to mass/volume

Answer: 19/15 in decimal form 1.267

Explanation:

when solving for density you divide mass by volume, when solving vor volume divide density and mass, finding mass multiply density and volume

Answer:

30 g

Explanation:

According to Mendeleev's theory, the total mass of the reactants and products are the same.

Answer:

5 g/cm3

Explanation:

Density = mass/volume

density = 15g / 3 cm3 = 5g/cm3

Answer:

3.34 g/cm3

Explanation:

density of water = mass/volume

d = 25 g/25cm3

d = 1g/cm3

Density of water is the same for all 3 values = 1g/cm3.

Average density of water = (1g/cm3 + 1g/cm3 + 1g/cm3)/3

= 1g/cm3

Standard deviation:

where symbol a is the standard deviation, xi is each value from the population, u is the mean and N is the size of population.

values are all = 1g/cm3

mean = average = 1g/cm3

N = 3 values

standard deviation = [(1g/cm3-1g/cm3)^2 + (1g/cm3-1g/cm3)^2 + (1g/cm3-1g/cm3)^2]/3

standard deviation = 0

%error = 0%