Design a synthesis of m-bromostyrene from benzene. 1284q Part 1: Choose the best option for the immediate precursor to the target molecule. 1284p1 1284p1b 1284p1a 1284p1e 1284p1d 1284p1c Dehydrohalogenation of the benzylic bromine can result in an alkene. Part 2: Choose the best option for the precursor needed to make the dibromide intermediate. 1284p2 1284p2d 1284p2c 1284p2b 1284p2a 1284p2e Bromination of the benzylic position of an ethyl group is easily accomplished and leads to the desired dibromide. Part 3: Choose the best option for the precursor needed to make the aryl bromide. 1284p3 1284p3a 1284p3e 1284p3d 1284p3c 1284p3b There are reductive methods which will convert a ketone carbonyl group to an methylene carbon (CH2) in one step. Part 4: Choose the best option for the precursor needed to make the keto-bromide intermediate. 1284p4 1284p4a 1284p4e 1284p4d 1284p4c 1284p4b An acetyl group is a meta director and will direct electrophilic bromination of the ring to the meta position. Part 5: Choose the best option for the precursor needed to make acetylbenzene (acetophenone). 1284p5 1284p5b 1284p5a 1284p5e 1284p5d 1284p5c Electrophilic acylation of benzene will give rise to the desired compound. Part 6 out of 12 Here is an overview of your retrosynthesis (there is no work, this is just a recap). 1284p6

Answer:

1. 111.54 kJ

2. 944.68 kJ

3. 339 kJ

4. 94.92 kJ

5. 21.0578 kJ

Explanation:

1. The heat required to melt a given quantity of ice is known as the latent heat of fusion, \(L^{\circ}_F\), of ice

\(L^{\circ}_F\), of ice = 330 J/g

The heat required to melt a given mass of ice = Mass of ice, m × latent heat of fusion, \(L^{\circ}_F\), of ice

The heat required to melt 338 grams of ice = 338 g × 330 J/g = 111,540 J = 111.54 kJ

2. The latent heat of vaporization, l, of water = 2260 J/g

The heat required to convert, m grams of water to steam at

The heat required to convert 418 grams of boiling water into steam = 418 g × 2260 J/g = 944680 J = 944.68 kJ

3. To convert 150 grams of boiling water to steam, we have;

Heat required = 150 g × 2260 J/g = 339,000 J = 339 kJ

4. To convert 42.0 grams of boiling water to steam, we have;

Heat required = 42.0 g × 2260 J/g = 94,920 J = 94.92 kJ

5. The specific heat capacity of steam is 1.996 J/(g·°C)

The heat, Q, required to raise a given mass, m, of steam by Δt °C is given as follows;

Q = m × c × Δt

The heat required to raise the temperature of 422 grams of steam from 110.0 °C to 135.0 °C is therefore;

Q = 422 g × 1.996 J/(g·°C) × (135.0 °C - 110.0 °C) = 21057.8 J

The heat required to raise the temperature of 422 grams of steam from 110.0 °C to 135.0 °C = 21057.8 J = 21.0578 kJ

The product at the negative electrode is not always a metal because it will only be produced if it is less reactive than hydrogen.

These are materials which donate electrons in a chemical reaction and have high heat and electrical conductivity.

Metals are more reactive than hydrogen which is why it is not always produced at the cathode.

Read more about Metals here https://brainly.com/question/4701542

#SPJ2

The mass in grams for each compound at STP is as follows:

To find the mass of a gas at STP (Standard Temperature and Pressure), we can use the ideal gas law, which states:

PV = nRT

Where P is pressure (usually 1 atm at STP), V is volume, n is the number of moles, R is the ideal gas constant (0.0821 L·atm/(mol·K)), and T is the temperature (usually 273 K at STP).

By rearranging the equation and plugging in the given values for pressure (1 atm) and temperature (273 K), we can solve for the number of moles. Then, using the molar mass of each gas, we multiply the number of moles by the molar mass to obtain the mass in grams. The molar mass of H₂ is approximately 2 g/mol, CO₂ is 44 g/mol, SO₂ is 64 g/mol, and F₂ is 38 g/mol.

Learn more about STP here https://brainly.com/question/30550516

#SPJ11

Answer:

Carbon

Explanation:

Steel is an alloy of iron and carbon. Stainless steels are steels containing at least 10.5% chromium, less than 1.2% carbon and other alloying elements

Answer: B

Explanation:Steel is an alloy of iron and carbon.

Answer:

In a nonpolar covalent bond, the atoms share electrons equally with one another.

Explanation:

Nonpolar covalent bonds are a type of bond that occurs when two atoms share a pair of electrons with each other. These shared electrons glue two or more atoms together to form a molecule.

Modern atomic theory was formed due to the work of all of the above: Ernest Rutherford, J.J. Thomson, and Robert A. Millikan.

The development of modern atomic theory involved the contributions of several scientists, including Ernest Rutherford, J.J. Thomson, and Robert A. Millikan.

1. Ernest Rutherford: Rutherford is known for his gold foil experiment, conducted in 1911, which provided evidence for the existence of a dense, positively charged nucleus at the center of the atom. This experiment led to the development of the nuclear model of the atom, proposing that the atom is mostly empty space with a small, dense, positively charged nucleus and negatively charged electrons orbiting around it.

2. J.J. Thomson: Thomson's experiments with cathode rays in the late 19th century led to the discovery of electrons. He proposed the "plum pudding" model of the atom, suggesting that atoms consist of a positively charged "pudding" with embedded negatively charged electrons.

3. Robert A. Millikan: Millikan's famous oil drop experiment, conducted in 1909, determined the charge of an electron and provided valuable information about the mass of an electron. His work contributed to the understanding of the fundamental properties of electrons.

The combined efforts of these scientists, along with many others, laid the foundation for modern atomic theory, which describes the structure and behavior of atoms based on the concepts of a nucleus, electrons, and their interactions.

Modern atomic theory was formed due to the work of Ernest Rutherford, J.J. Thomson, and Robert A. Millikan. Their contributions, along with other scientists, played a significant role in advancing our understanding of the structure and properties of atoms.

To know more about atomic theory, visit

https://brainly.com/question/13216011

#SPJ11

To manufacture 100 g of a 6.00% solution of Cupric sulfate - 5H₂O, we would dissolve 6 g in enough water to create a final volume of about 13.16 mL.

Response and justification According to the solubility graph, 170 g of Cupric sulfate/5H₂O are soluble in 100 g of water at a temperature of 100 degrees Celsius. Here, 100 grammes of water totally dissolves 170 grammes of CuSO₄ 5H₂O.

The molecular weight of Cupric sulfate - 5H₂O is 249.68 g/mol (CuSO₄ = 159.61 g/mol, 5H₂O = 90.07 g/mol).

6.00% solution means 6 g of CuSO₄ - 5H₂O in 100 g of solution.

So, we need to use the following formula to calculate the mass of CuSO₄ - 5H₂O needed:

mass of CuSO₄ - 5H₂O = (6/100) x 100 g = 6 g

We can calculate the final volume of the solution using the formula:

final volume of solution = mass of CuSO₄ - 5H₂O / (density of CuSO₄ - 5H₂O x % concentration)

density of CuSO₄ - 5H₂O = 2.284 g/mL

final volume of solution = 6 g / (2.284 g/mL x 0.06) = 13.16 mL

To know more about solution visit:-

brainly.com/question/30665317

#SPJ1

: PM2.5 is defined as the mass concentration of particles in the air less than or equal to 2.5 micrometers in diameter.Question 15: False, carbon dioxide (CO2) is not considered a criteria air pollutant.

Question 16: The closest answer is 50%, but the exact percentage is not provided in the question.Question 17: The term "photochemical smog" is most synonymous with ozone (O3), which is a criteria air pollutant.Question 18: True, attainment of ambient air quality standards requires that measured concentrations at all monitoring stations within an air district are below ambient air standards.

Question 14 asks about the definition of PM2.5. PM2.5 refers to particulate matter with a diameter less than or equal to 2.5 micrometers. It represents the mass concentration of particles suspended in the air, which are small enough to be inhaled into the respiratory system and can have adverse health effects.

Question 15 states whether carbon dioxide (CO2) is a criteria air pollutant. Criteria air pollutants are a set of pollutants regulated by environmental agencies due to their detrimental impact on air quality and human health. However, carbon dioxide is not considered a criteria air pollutant because it does not directly cause harm to human health or the environment in the same way as pollutants like ozone or particulate matter.

Question 16 asks about the percentage of carbon monoxide (CO) emissions from mobile sources in Santa Clara County. While the exact percentage is not provided in the question, the closest answer option is 50%. However, it is important to note that the precise percentage may vary depending on specific local conditions and emissions sources.

Question 17 inquires about the criteria air pollutant most synonymous with the term "photochemical smog." Photochemical smog is primarily associated with high levels of ground-level ozone (O3). Ozone is formed when nitrogen oxides (NOx) and volatile organic compounds (VOCs) react in the presence of sunlight, creating a hazy and polluted atmospheric condition.

Question 18 addresses the concept of "attainment" of ambient air quality standards. To achieve attainment, measured concentrations of pollutants at all monitoring stations within an air district must be below the established ambient air quality standards. This ensures that the air quality in the given area meets the required standards for protecting human health and the environment.

Learn more about mass concentration  here:- brainly.com/question/23437000

#SPJ11

The StartBracket upper O upper H superscript minus EndBracket equals StartFraction equation [OH-] = 1.0 x \(10^_-14\)/ [H+] is used to calculate [OH-] from [H+]. It is derived from the ion product constant for water.

The condition that accurately demonstrates the way that you could work out [OH-] from [H+] is:

[Goodness ] = 1.0 x \(10^_-14\)/[H+]

This condition is gotten from the particle item consistent for water, which is:

Kw = [H+][OH-] = 1.0 x \(10^_-14\)

At 25°C, the convergence of H+ and Gracious in unadulterated water are equivalent and each is equivalent to 1.0 x\(10^_-7\) mol/L. In this way, the pH of unadulterated water is 7.

On the off chance that the grouping of H+ in an answer is known, the centralization of Goodness can be determined involving the particle item consistent for water and reworking the condition to settle for [OH-]. This is on the grounds that the convergence of H+ and Goodness are conversely relative to one another.

Assuming the pH of the arrangement is known, the grouping of H+ can be determined utilizing the condition:

pH = - log[H+]

and afterward subbed into the situation to ascertain [OH-].

To learn more about StartFraction and StartBracket, refer:

https://brainly.com/question/16938099

#SPJ4

A rigid container holds 2.60 mol of gas at a pressure of 1.00 atm and a temperature of 20.0 °C. The container's volume is 62.4 L.

To find the container's volume, we need to use the ideal gas law which states that PV = nRT where :

P is pressure

V is volume

n is the number of moles of gas

R is the gas constant

T is temperature.

We can rearrange the equation to solve for V as follows : V = (nRT)/P

We are given n = 2.60 mol, P = 1.00 atm, T = 20.0°C = 293 K (remember to convert Celsius to Kelvin by adding 273), and R = 0.0821 L·atm/(mol·K).

Plugging in these values and solving for V, we get :

V = (2.60 mol)(0.0821 L·atm/(mol·K))(293 K)/(1.00 atm) = 62.4 L

Therefore, the container's volume is 62.4 L.

To learn more about pressure :

https://brainly.com/question/28012687

#SPJ11

The pressure of \(N_{2}\) will rise under the given conditions. And, Yes, it is possible to reverse this tendency by adding \(H_{2}\). The minimum pressure of H2 required to reverse the tendency is 0.01 atm.

The reaction involved is: \(N_{2}\)(g) + 3\(H_{2}\)(g) ⇌ 2\(NH_{3}\)(g)  Hence, when \(H_{2}\) is added to the above system, the \(N_{2}\) and  \(H_{2}\)  will react to produce \(NH_{3}\). This reaction will reduce the amount of \(N_{2}\) present in the system, causing the pressure of \(N_{2}\) to decrease. Therefore, by adding \(H_{2}\)  , we can change the tendency of \(N_{2}\) pressure from rise to fall.To calculate the minimum pressure of  \(H_{2}\)  required to reverse the tendency, we have to use the equilibrium constant, Kp. The expression for Kp for the above reaction is: Kp =( \(NH_{3}\)) / p(\(N_{2}\)) p3( \(H_{2}\) )

At equilibrium, Kp = 1.7 × 104 at 1126 °C.Now, we will solve for the minimum pressure of \(H_{2}\)   needed to reverse the tendency. Let's assume that the pressure of \(N_{2}\) has increased by x atm. Therefore, the new pressure of \(N_{2}\) will be (0.0406 + x) atm. At equilibrium, we have:

p2(\(NH_{3}\) ) / p(\(N_{2}\)) p3( \(H_{2}\) ) = 1.7 × 104

On substituting the given values and simplifying, we get:

p2(\(NH_{3}\)) / p(N2) = 6.39 × 10-5

Now, p2(\(NH_{3}\)) = 5.97 atm, and p(\(N_{2}\)) = (0.0406 + x) atm.

On substituting these values, we get:5.97 / (0.0406 + x) = 6.39 × 10-5

Solving for x, we get:x = 0.00579 atm ≈ 0.01 atm (rounded to 2 significant digits)Therefore, the minimum pressure of \(H_{2}\)   required to reverse the tendency is 0.01 atm.

More on equilibrium: https://brainly.com/question/30188799

#SPJ11

The dot and cross diagram is a way of representing a molecule along with its valence electrons and respective bonds. Valence electrons are drawn as a dot or a cross, each element will have a different connotation. Around the atoms, circles are drawn that indicate the bonds and how the electrons are shared.

Carbon has 4 valence electrons and oxygen has 6, the dot-and-cross diagram of CO2 will be:

Answer:

It's compound? It's chemical compound would be represented my letters or numbers

Answer:

The letters in a chemical formula are the symbols for the specific elements. So for example, H means hydrogen, O means oxygen, S means sul fur, C u means copper, F means fluorine, Fe means iron and Au means gold.

Explanation:

Yea, Hope I helped

Brainly appreciated

Answer:

8.28 MPa

Explanation:

From the question given above, the following data were obtained:

Radius (r) = 2×10¯³ m

Force applied (F) = 104 N

Pressure (P) =?

Next, we shall determine the area of the nail (i.e circle). This can be obtained as follow:

Radius (r) = 2×10¯³ m

Area (A) of circle =?

Pi (π) = 3.14

A = πr²

A = 3.14 × (2×10¯³)²

A = 3.14 × 4×10¯⁶

A = 1.256×10¯⁵ m²

Next, we shall determine the pressure. This can be obtained as follow:

Force applied (F) = 104 N

Area (A) = 1.256×10¯⁵ m²

Pressure (P) =?

P = F / A

P = 104 / 1.256×10¯⁵

P = 8280254.78 Nm¯²

Finally, we shall convert 8280254.78 Nm¯² to MPa. This can be obtained as follow:

1 Nm¯² = 1×10¯⁶ MPa

Therefore,

8280254.78 Nm¯² = 8280254.78 Nm¯² × 1×10¯⁶ MPa / 1 Nm¯²

8280254.78 Nm¯² = 8.28 MPa

Thus, the pressure exerted on the wall is 8.28 MPa

Answer:

Endothermic reactions are chemical reactions in which the reactants absorb heat energy from the surroundings to form products.

Answer:

Chemical reactions that absorb (or use) energy overall are called endothermic. In endothermic reactions, more energy is absorbed when the bonds in the reactants are broken than is released when new bonds are formed in the products.

Answer: Increasing the concentration of a base will cause the pH level of the solution to increase. Increasing the concentration of an acid will cause the pH level of the solution to decrease.

Explanation:

The graph shows that as mass increases, kinetic energy increases exponentially. This means that as the mass of an object increases, the kinetic energy increases by a larger and larger amount.

This can be seen by the upward sloping line on the graph. This can be seen in the graph by the steepness of the line, which shows that the increase in kinetic energy is growing faster and faster as the mass increases. Additionally, the graph shows that the rate of increase in kinetic energy is greater for lower masses than for higher masses, which indicates an exponential increase. This can be seen by the upward sloping line on the graph.

To learn more about kinetic energy click here https://brainly.com/question/28207341

#SPJ1

5.3 g each of ar, ne, and an unidentified diatomic gas are combined to form a gas mixture. The mixture takes up 12.57 l of space at stp. Consequently, the unknown gas has a molar mass of 0.3192 102 g/mol.

n = PV/RT

n=12.57mol/22.41 n=0.561 mol

The total number of moles of all the gases in the mixture is 0.561.

Find out how many moles of each gas there are now.

Moles = mass9(g)/molar mass(g/mol)

nAr is equal to 5.3g/39.98g/mol (0.132 mol)

nNe = 5.3g/20.18g/mol, or 0.263 mol

n total = nAr + nNe + n unidentified

0.561 = 0.132 mol, 0.264 mol, and n unknown, where n unknown = 0.561 mol, 0.264 mol, and 0.166 mol, respectively.

Currently, n unknown = mass of unknown/molar mass of unknown, where molar mass = mass/mole and mass/mole = 5.3g/0.166mol = 3/.92g/mol, respectively.

Therefore molar mass =  0.3192 × 102 g/mol

Learn more about molar mass here:

https://brainly.com/question/12127540

#SPJ4

The nucleus contains protons and neutrons.

A electrons

B neutrons

Answer:

A.A

Explanation:

I took the quiz and I got that answer

The statement "if you know the number of electron groups then you can predict the hybridization" is True.

This means that if you know the number of electron groups, then you can predict the hybridization. Let us understand what hybridization is.

Hybridization is a theory that explains the concept of the mixing of atomic orbitals to form new hybrid orbitals. These hybrid orbitals arrange themselves in a specific manner so that the valence electrons of the atoms involved can pair up with another atom to form a chemical bond.

Lone pair electrons and bond pair electrons are collectively referred to as electron groups. These groups are used to determine the shape and geometry of the molecule. A single, double, or triple bond counts as a single electron group, and each lone pair also counts as a single electron group. Hence, the total number of electron groups in a molecule is the sum of the number of bonding and lone pairs.

To predict hybridization, you need to count the total number of electron groups around the central atom. The number of hybrid orbitals required is the same as the number of electron groups. For example, if there are four electron groups around the central atom, the hybridization will be \(sp^3\).

Therefore the given statement is true.

To learn more about hybridization refer to: https://brainly.com/question/14140731

#SPJ11

In the core of the sun, where temperatures and pressures are extremely high, the dominant atoms are hydrogen. Due to these extreme conditions, the intense heat causes the nuclei and electrons of hydrogen atoms to become stripped from each other.

This process is known as ionization and leads to the separation of positively charged atomic nuclei, called protons, and negatively charged electrons. The core of the sun is an incredibly hot and dense region where nuclear fusion reactions occur. The primary element in the sun's core is hydrogen, which consists of a single proton and a single electron. Under the extreme temperatures and pressures in the core, the kinetic energy of the particles is exceptionally high. As a result, collisions between particles are frequent and energetic.

The intense heat causes hydrogen atoms to undergo ionization. Ionization is the process in which atoms lose or gain electrons, resulting in the formation of ions. In the case of the sun's core, the heat is sufficient to strip the electrons away from the hydrogen nuclei, separating them from each other. This leads to the formation of a plasma, which is a state of matter consisting of positively charged atomic nuclei (protons) and negatively charged electrons that move independently of each other.

In summary, because hydrogen is the dominant element in the core of the sun and the temperatures are extremely high, the intense heat causes the nuclei and electrons of hydrogen atoms to become stripped from each other through ionization. This process results in the formation of a plasma, which is the state of matter in the sun's core.

To learn more about nuclear fusion reactions visit: brainly.com/question/13090058

#SPJ11

Answer:

Yes

Explanation:

The compounds have both hydrogen and carbon only which are atoms that make up the hydrocarbons and they are also gases at room temperature

Answer:

lanthanum

Explanation:

lanthanum is an inner transition metal

This isn't mine, but this is an urgent question so writing my own answer would be time consuming, so here's a non-plagiarised answer :

Community is much more than belonging to something. It's about doing something together that makes belonging matter. We also talk about being in community and having a sense of community or community spirit. This is what it means to be in a genuine community — a feeling of belonging, of togetherness.

This is a different perspective from someone else :

A community is a group of people who share something in common. You can define a community by the shared attributes of the people in it and/or by the strength of the connections among them. You need a bunch of people who are alike in some way, who feel some sense of belonging or interpersonal connection.

Answer:

bbbbbbbbbbbbb bbee been been been been been bbeen been been hereafter idskdhjsjahdh#इ ह्ज!उकालो ज्वाला

Chlorine, ultraviolet (UV) radiation, and ozone are all commonly used in the disinfection of wastewater.

Chlorine is a chemical disinfectant that is effective against a wide range of microorganisms, including bacteria, viruses, and protozoa. Chlorine can be added to wastewater in the form of gas, liquid, or solid, and it works by reacting with the cell walls and other structures of microorganisms, ultimately leading to their destruction.

UV radiation is a physical disinfection method that uses ultraviolet light to inactivate microorganisms in wastewater. UV radiation works by damaging the DNA of microorganisms, preventing them from reproducing and causing infection.

Ozone is a powerful oxidizing agent that can be used to disinfect wastewater by destroying microorganisms and organic matter. Ozone works by breaking down the cell walls of microorganisms, disrupting their metabolic processes and causing their destruction.

To know more about UV radiation here

https://brainly.com/question/13849635

#SPJ4

The redox couple with the highest (most positive) redox potential is d. plastocyanin-Cu2+/plastocyanin-Cu.

The redox couple plastocyanin-Cu2+/plastocyanin-Cu does indeed have the highest (most positive) redox potential among the options provided.

Plastocyanin is a copper-containing protein involved in electron transfer within the photosynthetic electron transport chain. Its redox potential is relatively high due to the strong oxidizing properties of copper and its ability to accept and donate electrons during the electron transfer process.

Compared to the other redox couples mentioned in the options, plastocyanin-Cu2+/plastocyanin-Cu has the highest redox potential, making it an essential component in the electron transfer process and contributing to the efficient functioning of photosynthesis.

You can learn more about redox couple at: https://brainly.com/question/30000070

#SPJ11