Explain how the H NMR spectrum of ferrocene supports the assigned sandwich structure, rather than a structure in which the iron atom is bound to only one carbon atom of each ring.

The redox reaction which would most likely occur if silver and zinc metal were added to a solution that contained silver and zinc is Zn + Ag\(^+\) \(\rightarrow\)Zn\(^2+\) + 2 Ag .

Redox reactions comprise of two parts a reduced part and an oxidized part, which occur simultaneously . The part which is reduced gain electrons and hence there is a increase in oxidation state of the species.

While, the part which is oxidized looses electrons and hence there is a decrease in oxidation state of the species.During redox reactions, there is no net change in the number of electrons . Electrons which are given off in oxidation are used up in reduction.

The ion or molecule which accepts electrons is called as oxidizing agent while the ion or molecule which donates electrons is called as a reducing agent.

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The maximum work that could be obtained from 5.35 g of zinc metal is calculated as - 17. 3903 kJ

          Zn(s) + Cu²⁺(aq) ---> Zn²⁺ (aq) + Cu(s)

Δ G ° = Δ G° product - Δ G° reactant

         =   - 147 - 65.52

           =  - 212.52 kJ / mole

molar mass of zinc = 65.38 g/ mole

mole of Zn = \(\frac{gram of Zn}{molar mass}\)

                     = 5.35/ 65.38

W = - 212.52 kJ/ mole × 5.35 / 65.38 mole

           =  - 17. 3903 kJ                    

To put it another way, "G" is the change in a system's free energy as it transitions from one initial state (all reactants) to another, final state (all products). The maximum amount of usable energy that can be released (or absorbed) during the transition from the initial to the final state is shown by this value.

"Mass per mole" can be used to describe molar mass. To put it another way, a substance's molar mass is the total mass of all its atoms in one mole's worth. It is quantified in grams per mole.

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A debate among scientists on how new species form is based on speciation.

Divergence explains how organisms on Earth are related because it shows how species are similar or different.

Genes play the role in diversity of carrying information that results in changes from one generation to the next.

Natural selection is part of evolution because it explains why attributes are either in existence or have gone extinct.

One of the main debates among scientists on how new species form centers around the concept of speciation. There are two main hypotheses for speciation: allopatric speciation and sympatric speciation.

Divergence is the process by which different populations or species of organisms evolve from a common ancestor over time. This process is responsible for the diversity of life on Earth. By studying the similarities and differences between different organisms, scientists can infer evolutionary relationships.

Genes are the basic units of inheritance that carry information from one generation to the next. They play a crucial role in creating diversity among organisms. The genetic diversity of a population is the result of mutations, gene flow, and genetic drift.

The theory of natural selection is one of the most important and widely accepted explanations for the diversity of life on Earth. It is the process by which certain traits become more or less common in a population over time, depending on their impact on the survival and reproduction of the organisms that possess them.

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The ph of the stomach can influence the ionization of drugs such as aspirin (aka acetylsalicylic acid or hasp). given that at equilibrium the ph of a 0.1 m aspirin is 2.24. So the pKa of aspirin is approximately +∞.

The pKa of aspirin can be calculated from the pH of a 0.1 M solution of aspirin at equilibrium using the following equation:

pKa = pH + log([A-]/[HA])

where,

[A-] and [HA] = the concentrations of the aspirin ionized (A-) and non-ionized (HA) forms, respectively.

At a pH of 2.24, the concentration of the ionized form of aspirin is much higher than that of the non-ionized form,

so we can assume that

[A-] ≈ 0.1 M

[HA] ≈ 0.

Substituting these values into the equation, we get:

pKa = 2.24 + log(0.1/0) = 2.24 + log(infinity) = 2.24 + +∞ = +∞

So the pKa of aspirin is approximately +∞.

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Answer:

The Milky Way

Explanation:

Answer:

The Milky Way

Explanation:

The molar mass of calcium hydroxide, Ca(OH)₂ is 74.10 g/mol. The moles of the K₂SO₄ is 0.086 mol . The grams of the glucose is 639 g.

The molar mass of the Calcium oxide , Ca(OH)₂ is :

Ca(OH)₂ = 40 + 2( 15.99 + 1 )

              = 74.10 g/mol

The moles of the  K₂SO₄ in the 15 g of the  K₂SO₄ :

Moles = mass / molar mass

Moles = 15 / 174.25

Moles = 0.086 mol

The moles of the glucose, C₆H₁₂O₆ = 3.55 mol

The mass of the glucose = moles × molar mass

                                         = 3.55 × 180

                                         = 639 g

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By create calibration curve.

What is calibration curve?

In many different disciplines, such as analytical chemistry and biochemistry, calibration curves are frequently utilized. A calibration curve is used to calculate the limit of detection and the limit of quantitation, as well as the concentration of an unknown material. The instrument response to a series of standard samples at various concentrations is used to produce the curve. To enable the prediction of unknown concentrations, the data are then fitted with a function.

A calibration curve can be used to figure out the concentration of an unidentified medication. By comparing these curves to data from known medications at different doses, researchers and developers can utilise them to establish where an unfamiliar compound plots. A spectrophotometer is used to collect absorbance for varied concentrations.

This method of identifying unknown substances can be advantageous to numerous industries. For instance, coffee roasting might make use of a calibration curve. A plot can be used by roasters to estimate a bean's caffeine spectrum. Gelatin's food colour content could be displayed on a calibration curve for the food industry.

Additional applications include

production of chemicals, plastics, paints, and cosmetics

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Explanation:

the intensity of a He-Ne laser (633 nm ,5 mW) transmitted by different Gase samples is observed to change in correlation with the Nd-yttrium-aluminium-garnet laser pulse (532 nm, 7.8ns ,3mJ) which excites them

Answer:

Explanation:

A) As temperature is increased, Kinetic energy increases. As KE ∝ velocity, velocity increases, and thus, there will be more frequent collisions.

B) As temperature increases, heat energy applied is converted into kinetic energy. Thus, a greater proportion of particles will have sufficient energy to react, upon colliding.

C) Mass remains constant

Answer:

If the temperature increases, temperature reflects the speed of the molecules, so if the molecules are at a higher temperature, they are faster and they start to break bonds and new things react.

Explanation:

Answer:

B

Explanation:

sight, hearing, smell, taste and touch

Answer:

Most easiest answer..

There are 5 senses in human body.☺️

Answer:

Earth is in the solar system.

Explanation:

Earth is our home and it is in the solar system.

Earth is the fifth-largest of the planets in the solar system and the third planet from the sun. Earth is the only planet having oxygen and water that supports life. Till now according to the research Earth is the only planet having life.

Planets are in the solar system, the solar system is in the milky way and the milky way is present in the universe. The astronomer identifies our home in the universe as "Earth is in the solar system" as Earth is our home.

Hence, the correct answer is "Earth is in the solar system."

Answer:

The Milky Way is in the universe. The solar system is in the Milky Way. Earth is in the solar system.

Explanation:

If the Milky Way Is in the universe and solar system you would know earth is also In the solar system, so "Our home planet is the third planet from the Sun, and the only place we know of so far that's inhabited by living things. While Earth is only the fifth largest planet in the solar system, it is the only world in our solar system with liquid water on the surface."

Answer:

Scientists were unsure about the last common ancestor between apes and humans because fossils are so scarce, researchers do not know what the last common ancestors of living apes and humans looked like or where they originated.

Explanation:

Answer: a. 65.37 mL
b. 5.3 cm
c. 2.08 km (plus) or 1.64 km (minus)
d. 18°C (plus) or 16°C (minus)

Explanation:

The way significant figures work when you're adding or subtracting, is you go to the answer with the least amount of decimal places. Take a. for example; you have 65.316 (3 places after the decimal) and 0.05 (2 places after the decimal place). Based off of this, you would round your answer to two places after the decimal. And when you have a whole number, like in d. you round to the nearest whole number, since there aren't any decimal places to round your answer to.

Answer: Single Displacement

Explanation:

A bit confused about the set-up but if we're given Al + Fe3O4 -> Al₂O3 + Fe, Aluminum swaps places with Iron, giving us a Single Displacement reaction.

Iodine is the most likely candidate since, first of all, it is included in the list of halogens together with all of the other elements.

Iodine is used orally to prevent and cure iodine deficiency and also its effects, such as goiter but some thyroid problems. The US FDA has also approved potassium iodide, a particular kind of iodine, to protect thyroid damage following a radioactive mishap.

Inflammation of the thyroid gland and thyroid cancer can also result from high iodine consumption. A very high amount of iodine (several grams, for instance) can result in a coma, fever, stomach pain, nausea, vomiting, diarrhea, and burning in the mouth, throat, and stomach.

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150g•1moles/189.36g= 0.792moles

\(C6H_14\)is the molecular formula for Hexane, a hydrocarbon. The correct model for \(C6H_14\) is D. Option D is correct answer.

/\/\/\/:Hexane (\(C6H_14\)) is an alkane with a chain of six carbon atoms, having 14 hydrogen atoms. The bond angles of carbon atoms in hexane are 109.5 degrees, and carbon atoms in hexane have a tetrahedral geometry. The representation of a molecule in a model helps to visualize the 3D structure of the molecule. A simple way to represent the 3D structure of hexane is by using the wedge-and-dash notation. In this notation, solid wedges represent bonds coming out of the plane of the paper towards us, and dashed lines represent bonds going back into the plane of the paper away from us. Using this notation, the correct model of hexane (\(C6H_14\)) would be D. /\/\/\/.

The correct option is D.

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Answer:

A.) 0.43 g

Explanation:

Before you can calculate the mass, you need to find the moles. You can do this by using Avogadro's Law:

V₁ / n₁ = V₂ / n₂

In this equation, "V₁" and "n₁" represent the first balloon's volume and mole value. "V₂" and "n₂" represent the second balloon's volume and mole value. Since you are searching for the first balloon's mole value, you can plug the other values into the equation and simplify to find n₁.

V₁ = 1.54 L                         V₂ = 0.72 L

n₁ = ? moles                      n₂ = 0.100 moles

V₁ / n₁ = V₂ / n₂                                               <----- Avogadro's Law

1.54 L / n₁ = 0.72 L / 0.100 moles                 <----- Insert values

1.54 L / n₁ = 7.2                                              <----- Simplify right side

1.54 L = 7.2 x n₁                                              <----- Multiply both sides by n₁

0.214 = n₁                                                       <----- Divide both sides by 7.2

Now, you can find the mass using the molar mass of the gas. Remember, hydrogen exists as a diatomic molecule.

Atomic Mass (H₂): 2(1.008 g/mol)

Molar Mass (H₂): 2.016 g/mol

0.214 moles He            2.016 g
--------------------------  x  -----------------  =  0.43 g H₂
                                       1 mole

nswerllo

Explanation:

Answer:

e

Explanation:

and e

The concentration equilibrium constant for the decomposition of ammonia at the final temperature of the mixture is approximately 0.12 (rounded to 2 significant digits).

To calculate the concentration equilibrium constant for the decomposition of ammonia, we can use the equation:

NH3(g) ⇌ N2(g) + 3H2(g)

From the question above,

Initial moles of NH3(g) = 22.0 mol

Moles of N2(g) at equilibrium = 8.8 mol

To find the moles of H2(g) at equilibrium, we can use stoichiometry:

From the balanced equation, we can see that 1 mole of NH3 decomposes to form 1 mole of N2 and 3 moles of H2.

Therefore, the moles of H2(g) at equilibrium would be 3 times the moles of N2(g):

Moles of H2(g) at equilibrium = 3 * 8.8 mol = 26.4 mol

Now, we can calculate the concentrations at equilibrium:

Concentration of NH3(g) = 22.0 mol / 50.0 L = 0.44 M

Concentration of N2(g) = 8.8 mol / 50.0 L = 0.176 M

Concentration of H2(g) = 26.4 mol / 50.0 L = 0.528 M

The equilibrium constant expression for the reaction is: Kc = [N2][H2]^3 / [NH3]

Substituting the given values, we get: Kc = (0.176)(0.528)^3 / (0.44)

Calculating this expression, we find: Kc ≈ 0.115 Therefore, the concentration equilibrium constant for the decomposition of ammonia at the final temperature of the mixture is approximately 0.12 (rounded to 2 significant digits).

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Answer:

4

Explanation:

Oxygen, Sulfur, Selenium

Answer:

Teflon

Explanation:

Answer:

false tjytyjiy

Explanation:

cnruujrkyrryyrkkurk

Answer:

True

Explanation:

If you were to change up the order the answer may be incorrect

The scientific process is linear and most commonly follows the same sequence of steps in the same order. However, it need to follow all the steps for all scientific process. Hence, the statement is false.

A scientific process is a well designed approach to investigate or analyze the problem and to test a relevant hypothesis. The steps included in the scientific process starts from a scientific question.

The question then generates a hypothesis based on the observations and standard data. The testing is conducted with well designed experiment with all practical tools available.

The experimental results are thoroughly evaluated and the reaches with a conclusion. The results are communicated through various journals. This is the general way of a scientific process. But not every scientific strictly need to follow this. Hence, the statement is false.

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Explanation:

done.....................

Answer:

I believe it is Gasoline

Explanation:

This problem is asking for the structural formula of an aldehyde whose molecular formula is C₃H₆O and shown on the attached file:

In chemistry, molecular formulas show the actual number of atoms in a chemical compound; thus, in this case, we need to draw three carbon atoms together, arranged with six hydrogen atoms in which one of them contributes to the carbonyl group as an aldehyde is required.

In addition to the molecular formulas, structural formulas show the number and types of bonds that are formed in an organic compound; thus, in C₃H₆O, we see three single bonds between the carbon atoms, three hydrogen atoms bonded to the third carbon, two to the second one, a double-bonded oxygen with the first carbon and the last hydrogen atom in order to complete the octets on each atom.

In such a way, we draw the required structure as shown on the attached file.

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