In each of the following reactions, put a square around the substance that is reduced and a circle around the substance that is oxidized in the forward reaction. Label the oxidizing agent (OA) and the reducing agent (RA) in the forward reaction. If the change does not involve redox, write "no redox" instead. a) Zn + 2H+ - H2 + Zn2+ b) NH + H2O NH3 OH c) Br2 + 2 Agl 12 + 2 AgBr d) Pb + PbO2 + 2 SO42- + 4H 2 PbSO4 + 2 H2O (this is the rxn in your car battery) e) 4H + 2 NO3- + Zn Zn2+ + 2 H2O + 2 NO2 f) 2 OH + 2 MnO2 + 3 H2O2 2 Mn04 + 4 H20

A  layer represents the radiative zone which is at the centre of the cross-sectional diagram.

The layer of a star that lies just outside the core, to which radiant energy is transferred from the core in the form of photons.

In the Sun, the region between the solar core at 0.2 of the Sun's radius and the outer convection zone at 0.71 of the Sun's radius is referred to as the radiation zone, although the core is also a radiative region.

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B

A is inner core B is outer core and there is a few other layers but from what I know looking at this the second layer has always been the radioactive zone.

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Answer:

the explanation of this 20

Explanation:

20 c

Answer:

2 NO2 -> 2 O2 + N2

is a decomposition reaction

The “33 percent more for free” deal is better than the “33 percent off” deal. This is because the “33 percent more for free” deal gives you 13.3 ounces of coffee for $10, while the “33 percent off” deal gives you only 6.7 ounces of coffee for $6.67

For the “33 percent more for free” deal:

10 dollars for 10 ounces of coffee

13.3 ounces of coffee for 10 dollars (33% more)

Price per ounce = 10/13.3 = $0.75 per ounce

For the “33 percent off” deal:

10 dollars for 10 ounces of coffee

6.7 ounces of coffee for $6.67 (33% off)

Price per ounce = 6.67/6.7 = $0.99 per ounce

So, the “33 percent more for free” deal is better than the “33 percent off” deal because you get more coffee for your money.

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The dissolution of gases in water is exothermic therefore oceans will dissolve less CO2 as their temperatures rise.

The term  effervescence refers to the rise of a gas in a system or simply put, it is the evolution of gas. When an  effervescent tablet is placed in the water under each inverted glass, a gas will rise in each glass.

The air space in the hot glass  is greater than the air space in the cold glass  We can see that the gas has a lower solubility in hot water than in cold water. This is because, solubility of gases is exothermic.

The bottle that is left in the hot sun will have more fizzing because the CO2 does not dissolve owing to the higher temperature.

The rise in ocean temperature means that the oceans will dissolve less CO2 in the future and reduce the CO2 holding capacity of the oceans.

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The crystal field splitting energy for the transition metal complex with a maximum absorbance of 610.7 nm is approximately 53.8 kJ/mol.

The absorbance maximum at 610.7 nm corresponds to the energy of the absorbed light, which can be calculated using the equation E = hc/λ, where E is the energy, h is Planck's constant, c is the speed of light, and λ is the wavelength. Rearranging the equation to solve for the crystal field splitting energy (Δ), we get Δ = hc/λ. Plugging in the values, Δ = (6.626 x 10^-34 J·s * 3.00 x 10^8 m/s) / (610.7 x 10^-9 m). The result is approximately 3.23 x 10^-19 J. To convert this to kJ/mol, we need to multiply by Avogadro's number (6.022 x 10^23) and divide by 1000, giving us a crystal field-splitting energy of approximately 53.8 kJ/mol. This value is obtained by calculating the energy of the absorbed light using the equation E = hc/λ, where E is the energy, h is Planck's constant, c is the speed of light, and λ is the wavelength. By rearranging the equation and plugging in the values, we can determine the crystal field splitting energy, which represents the energy difference between the d-orbitals in the complex.

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Answer:

I believe the volume should increase.

Answer:

D.  

cut.

Explanation:

Both the appearance and cooking times of food items are affected by the way a piece of food is cut. Thus option D is correct.

Food has an important role in both culture and cuisine of every country, Different types of food combine to form culinary delights which can bring people together

Food is obtained from both plants and animals where Plants are the primary producers in the food pyramid and all organism directly or indirectly obtain food from plants.

Herbivorous animals get their food from their  plant ecosystem where Some animals, obtain food by hunting other animals while others depend on decaying matter of plants and animals  which are called decomposers like bacteria, fungi.

Food offers  variety forms  depend upon climatic conditions and availability and depend on the different factors like Physical determinants ,Biological determinants, Economical determinants.

Thus option D is correct.

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Answer:

A) 122 atm

Explanation:

PV = nRT

Solve for P --> P = nRT/V

n = 10.0 mol + 5.0 mol = 15.0 mol

R = 0.08206 L atm / mol K

T = 25 + 273 = 298 K

V = 3.0

P = (15.0)(0.08206)(298) / (3.0) = 122 atm

It is important to keep the stopcock open after adding hydrochloric acid to the marble chips in an Erlenmeyer flask for gas collection and accurate measurement of the carbon dioxide produced during the reaction.

By allowing the gas to escape into the syringe or collection apparatus, the experiment can obtain precise gas volume measurements. Additionally, immediately replacing the stopper and syringe assembly helps prevent gas loss and maintains safety by avoiding the build-up of excessive pressure inside the flask.

These measures ensure the reliable and controlled execution of the experiment while obtaining accurate data.

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The correct answer is D) H2C=O < CH3OH < CH3CH3Explanation:Viscosity is the measure of the resistance of a liquid to flow.

It is the ratio of shear stress to shear rate, which is a measure of how fast the fluid is moving between the plates. It can be measured in different units such as poise or centipoise.The viscosity of a liquid is affected by the attractive forces between the molecules, which depend on the type of molecules and their intermolecular forces. The stronger the intermolecular forces, the more viscous the liquid.In this case, CH3OH (methanol), CH3CH3 (ethane), and H2C=O (acetone) are the compounds to be ranked. Methanol is a polar molecule with hydrogen bonding and has a higher viscosity than ethane, which is nonpolar and has weak van der Waals forces. Acetone is a polar molecule with dipole-dipole interactions that are intermediate between methanol and ethane. The order of increasing viscosity is therefore H2C=O < CH3OH < CH3CH3.

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Answer:

The limiting reactant is the covers.

We are left with 3750 sheets of lined paper, 1125 sheets of graph paper and 25 staples.

Explanation:

the reaction is:

B - book

C - cover

Sl = sheet of lined paper

Sg - sheet of graph paper

St - staple

1B = 2C + 50Sl + 25Sg + 3St

We have covers for 150/2 = 75 books

We have lined paper for 7500/50 = 150 books

We have graph paper for 3000/25 = 120books

We have Staples for 250/3 = 83.(3) books, so for 83 books as we cannot make 1/3 of a book.

Because we only have covers for 75 books, covers are the limiting reactant.

After making 75 books we are left with:

0 covers

7500 - 75*50 = 3750 sheets of lined paper

3000 - 75*25 = 1125 sheets of graph paper

250 - 75*3 = 25 staples

The limiting reactant should be the covers.

We are left with 3750 sheets of lined paper, 1125 sheets of graph paper, and 25 staples.

The reaction should be like:

B - book

C - cover

Sl = sheet of lined paper

Sg - sheet of graph paper

St - staple

Now the equation should be

1B = 2C + 50Sl + 25Sg + 3St

We have covers for 150/2 = 75 books

We have lined paper for 7500/50 = 150 books

We have graph paper for 3000/25 = 120books

We have Staples for 250/3 = 83.(3) books, so for 83 books as we cannot make 1/3 of a book.

Now the left should be

7500 - 75*50 = 3750 sheets of lined paper

3000 - 75*25 = 1125 sheets of graph paper

250 - 75*3 = 25 staples

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Answer: Do you have an image so I can solve it?

Answer:

Kinetic energy, form of energy that an object or a particle has by reason of its motion. If work, which transfers energy, is done on an object by applying a net force, the object speeds up and thereby gains kinetic energy.

Answer:

A. inverse

Explanation:

Boyle's Law is a relationship between pressure and volume. In this relationship, pressure and volume have an inverse relationship when temperature is held constant. If there is a decrease in the volume there is less space for molecules to move and therefore they collide more often, increasing the pressure.

Answer:

first one is right.

there are 117 elements, so 2nd option is wrong.

elements are made up of one type of atoms, so 3rd is also wrong.

most elements are metal. so 3rd is wrong

Answer: I don’t think the answer is A or C. Maybe B.

The word chemosynthesis means

the synthesis of organic compounds by bacteria or other living organisms using energy derived from reactions involving inorganic chemicals, typically in the absence of sunlight.

Explanation:

Answer:

Because water conducts electricity, so if an electrical current were to meet the water while you're in there taking a bath, you would essentially be surrounded by a huge conductor.

Answer:

I think A I hope it's A

Explanation:

hsjsjakkska

I think producer

option is A

Answer:

B. Producer

Explanation:

A producer is normally a type of plant which is food for the animals. Decomposers are things that decompose dead living things into nutrients and etc. Consumers are the ones who normally feed on producers in the food web and are small animals.

The element for the given electron configuration 1s²2s²2p⁶3s²3p⁶3d¹⁰4s²4p⁰ is Chromium (Cr).

An element's electron configuration is a numeric representation of how the electrons are distributed among the various energy levels and orbitals. It may provide valuable insights into an element's chemical properties and reactions. To comprehend this electron configuration, we'll go through each sublevel from the lowest to the highest energy level: 1s², 2s², 2p⁶, 3s², 3p⁶, 3d¹⁰, 4s², and 4p⁰.

The 1s sublevel contains two electrons (1s²). In the second energy level, the 2s sublevel contains two electrons (2s²), and the 2p sublevel contains six electrons (2p⁶). The 2p sublevel has three orbitals, each of which may accommodate two electrons. As a result, the 2p sublevel contains six electrons. The third energy level contains 3s² and 3p⁶ sub levels. The 3s sublevel contains two electrons, while the 3p sublevel contains six electrons.

Both sublevels' orbitals may accommodate two electrons. The 3d sublevel is also in the third energy level. It contains ten electrons (3d¹⁰). The 3d sublevel has five orbitals, each of which may hold two electrons. As a result, the 3d sublevel has ten electrons. The 4s sublevel is in the fourth energy level. It contains two electrons (4s²). Finally, the 4p sublevel contains zero electrons. As a result, the electronic configuration 1s²2s²2p⁶3s²3p⁶3d¹⁰4s²4p⁰ is that of Chromium (Cr).

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The given question is incomplete. The complete question is:

Consider the spontaneous dissolution of NaCl in water: NaCl(s) → Na+(aq) + Cl −(aq) Predict whether the entropy change for this process is positive or negative and explain your answer. Then, predict whether the free energy change for the process is positive or negative and explain your answer.

Answer: The entropy change is positive. The free energy change for the process is negative and reaction is spontaneous.

Explanation:

Entropy is defined as the degree of randomness of a system. For a system in which randomness increses , the enetropy is said to increase and [tex]\Delta S[/tex] is positive.

As in the given reaction : [tex]NaCl(s)\rightarrow Na^+(aq)+Cl^-(aq)[/tex] , the solid is dissociating to give ions , randomness increases and thus entropy is positive.

Also the dissociation of a molecule requires energy , thus the enthalpy [tex]\Delta H[/tex] is also positive as heat is absorbed by the system.

[tex]\Delta G=\Delta H-T\Delta S[/tex]

[tex]\Delta G=(+ve)-T(+ve)[/tex]

[tex]\Delta G=-ve[/tex] when Temperature is high.

Consider the spontaneous dissolution of NaCl in water: NaCl(s) → Na+(aq) + Cl −(aq)

Predict whether the entropy change for this process is positive or negative and explain your answer. Then, predict whether the free energy change for the process is positive or negative and explain your answer.

The given question is incomplete. The complete question is:

Consider the spontaneous dissolution of NaCl in water: NaCl(s) → Na(aq)  Cl −(aq) Predict whether the entropy change for this process is positive or negative and explain your answer. Then, predict whether the free energy change for the process is positive or negative and explain your answer.

Answer: The entropy change is positive. The free energy change for the process is negative and reaction is spontaneous.

Explanation:

Entropy is defined as the degree of randomness of a system. For a system in which randomness increses , the enetropy is said to increase and  is positive.

As in the given reaction :  , the solid is dissociating to give ions , randomness increases and thus entropy is positive.

Also the dissociation of a molecule requires energy , thus the enthalpy  is also positive as heat is absorbed by the system.

when Temperature is high.

Which of these ideas did you include in your answer?

Have a Nice Day .

Answer:

i think its 62.50 :) hope this helped you out

Answer: If one mole of carbon monoxide has a mass of 28.01 g and one mole of carbon dioxide has a mass of 44.01 g , it follows that the reaction produces 44.01 g of carbon dioxide for every 28.01 g of carbon monoxide.

Explanation: (May Be Unrelated?)

61.9 grams

2.33x10^23 molecules (159.7 g Fe2O3/6.02x10^23 molecules) = 61.9 g

The required correct answer is D) 2.70 M

The final concentration of a solution prepared by using 75.0 mL of 18.0 M H2SO4 to prepare 500. mL of solution is 2.70 M. Here's how to calculate it:We will use the formula:M1V1 = M2V2where:M1 = initial molarityV1 = initial volumeM2 = final molarityV2 = final volumeGiven that M1 = 18.0 M, V1 = 75.0 mL, and V2 = 500. mL. We can find M2 as follows:M1V1 = M2V218.0 M x 75.0 mL = M2 x 500. mLM2 = (18.0 M x 75.0 mL)/500. mL= 2.70 MTherefore, the final concentration of the solution is 2.70 M. The correct option is D.

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