Predict the e structure of the product for the following reaction. Zn(Hg) AICI3 HCI, A 000100,0 IV a. I d. IV e. V 4. Provide the reagent(s) that are necessary to carry out the following conversion. t-butylbenzene-butyl-4-chlorobenzene a. Clh, heat b Cl2, FeCls soch pyridine

Hydrogen bonds occur between neighboring amino acids in a secondary structure in creating alpha helices and beta pleats.

Hydrogen bond is an electrostatic attraction between two polar groups that occurs when a hydrogen atom (H), covalently bound to a highly electronegative atom such as flourine (F), oxygen (O) and nitrogen (N) atoms.

Protein is composed of amino acid linked with peptide bond, secundary structure can be α-helices and beta pleated sheet.

In a beta-pleated sheet, hydrogen bonds are formed between carbonyl and amino groups of backbone.

Fluorine atom has greater electronegativity than oxygen atom in carbony group, so the hydrogen bond with hydrogen atom is shorter and strands are closer.

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Answer:

বোকাচোদা মাণ্ডু খানকির ছেলে চোদাচুদি করে

Answer:

-488.2 kJ/mol

Explanation:

To calculate the enthalpy change of the reaction, we can use the standard molar enthalpies of the formation of the products and reactants, which are given in the problem.

ΔH = Σ(nΔHf° products) - Σ(nΔHf° reactants)

where ΔH is the enthalpy change of the reaction, n is the stoichiometric coefficient, and ΔHf° is the standard molar enthalpy of formation.

Substituting the values given in the problem, we get:

ΔH = [(1 mol)(-393.5 kJ/mol) + (2 mol)(-241.8 kJ/mol)] - [(1 mol)(-238.4 kJ/mol) + (2 mol)(0 kJ/mol)]

= -726.6 kJ/mol + 238.4 kJ/mol

= -488.2 kJ/mol

The negative sign indicates that the reaction is exothermic, which means that it releases heat. Therefore, the enthalpy change of the reaction is -488.2 kJ/mol.

Answer:

The 85 degree F glass will have an accelerated chemical reaction, because the water was warmer.

Explanation:

The glass of water with the higher temperature will have an accelerated chemical reaction because the water is warmer.

The rate of chemical reaction is directly proportional to the temperature changes.

As temperature increases so is the reaction rate.

Answer:

Potential (C).

Explanation:

Stored energy is a synonym for potential energy. I hope this helps! :)

Answer:

All of the above

Explanation:

The reaction which happens inside the beaker is given by

∆represents heat

The reaction is an exothermic reaction and it releases heat to the surroundings

Answer: The economic demands of Plan B were too high.

Explanation: During the selection of any action plan to maintain biodiversity, several factors must be considered. These factors include the cost of the plan, the estimated effectiveness of the plan at protecting the targeted populations, and how the plan will affect both humans and other populations in the area.

The chart shows that the approximate cost of implementing Plan A was $5 billion. The approximate cost of implementing Plan B was $30 billion. While Plan B might have been more effective at reducing habitat destruction, and thus maintaining biodiversity, state officials likely chose Plan A over Plan B because the economic demands of Plan B were too high.

Answer: The economic demands of Plan B were too high.

Explanation:

just did it

Answer:

i think I false bro

like me

Answer:

82.1 kilograms

Explanation:

divide 181 by 2.205 to convert

Answer:

 The correct answer is option A, that is, HCl.  

An acid refers to an ion or molecule possessing the tendency of donating a hydrogen ion or a proton, or alternatively, exhibiting a tendency of producing a covalent bond with a pair of electrons. The aqueous Arrhenius acids exhibit characteristic features that offer a practical illustration of an acid.  

The acids can turn blue litmus paper red, can form aqueous solutions with a sour taste, and reacts with bases and some kind of metals to produce salts. One of the general aqueous acids is HCl (hydrochloric acid) that is found in the stomach and stimulates digestive enzymes.  

Explanation:

Answer:

ver explicacion

Explanation:

El elemento que tiene el número atómico 56 en la tabla periódica del bario. El bario es un elemento del grupo dos.

Se combina con el cloro para formar cloruro de bario. que tiene la fórmula BaCl2 de acuerdo con la valencia de ambos elementos.

El cloruro de bario es un compuesto iónico.

Methanol's combustion enthalpy can be calculated at -540 (kJ mol-1).

Methanol, the most basic form of alcohol (CH3OH), serves as the chemical basis for countless items used in daily life, such as paints, plastics, auto parts, and building supplies. Additionally, methanol is a renewable resource that powers fuel cells, boilers, cook stoves, ships, automobiles, trucks, and buses.

Energy required to dissociate the bonds connecting reactants

3 × 413 + 358 + 464 + 1.5 × 498 (kJ mol-1) / 2808 (kJ mol-1);

Total energy released when products form bonds

4 × 464 + 2 × 746 (kJ mol-1) / 3348 (kJ mol-1);

∆H = -540 (kJ mol-1).

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The complete question is -

Methanol is made in large quantities as it is used in the production of polymers and in fuels.

The enthalpy of combustion of methanol can be determined theoretically or experimentally.

CH₃OH(l) + 1 O₂(g) → CO₂(g) + 2H₂O(g)

Using the information from Table 10 of the Data Booklet, determine the theoretical enthalpy of combustion of methanol.

Answer:

fluorine

Explanation:

Fluorine is the most electronegative element on the periodic table.

Emerging scientific ideas are new theories or ideas that are gaining attention in the scientific community, but have not yet been fully accepted or confirmed.

Emerging ideas refer to the new and innovative ideas or theories that have yet to gain full scientific acceptance. While a scientific consensus is a view or theory that has been universally accepted and confirmed by multiple experiments or research, an emerging scientific idea is a new and unproven theory or idea that is gaining attention in the scientific community. These emerging ideas may also be referred to as scientific hypotheses. In contrast to scientific consensus, emerging scientific ideas have not yet been subjected to rigorous testing and confirmation.

They are generally proposed to explain new observations or experimental results, which have not yet been fully understood or explained by established scientific theories. Emerging scientific ideas can have the potential to challenge the current scientific consensus. If an emerging scientific idea is found to be valid, it can ultimately lead to the establishment of a new scientific consensus. For example, the emerging scientific idea of the Higgs boson particle led to the discovery of a new field in particle physics, which is now an established scientific consensus.

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Answer:False. The Bohr model correctly predicts energy levels of hydrogen and hydrogen-like atoms.

Explanation:

Fatty acids are classified according to the number of double bonds they contain in the carbon chain. Saturated fatty acids contain no double bonds, monounsaturated fatty acids contain one double bond, and polyunsaturated fatty acids contain two or more double bonds.

Palmaitic (16:0) is a saturated fatty acid. Linoleic (18:2) is a polyunsaturated fatty acid. Arachidonic (20:4) is a polyunsaturated fatty acid. Palmaitoleic (16:1) is a monounsaturated fatty acid. The double bonds are present in the cis configuration. Saturated fatty acids such as palmaitic (16:0) lack double bonds and are solid at room temperature. Monounsaturated and polyunsaturated fatty acids are liquid at room temperature. Palmaitoleic (16:1) contains one double bond between carbon atoms 9 and 10 and is a monounsaturated fatty acid.

In conclusion, fatty acids are molecules that make up the fats and oils found in food. They are classified into three categories: saturated, monounsaturated, and polyunsaturated fatty acids. Saturated fatty acids contain no double bonds and are typically solid at room temperature. They have been linked to an increased risk of heart disease because they raise levels of LDL cholesterol. Polyunsaturated fatty acids contain two or more double bonds and are typically liquid at room temperature. They are considered heart-healthy because they help to lower LDL cholesterol and reduce inflammation.

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Answer: 0.05 kgm/s

Explanation:

Answer:Transcript A liquid’s vapor pressure is directly related to the intermolecular forces present between its molecules. The stronger these forces, the lower the rate of evaporation and the lower the vapor pressure.

Explanation:

As vapors are produced more from a liquid there will be more cooling effect as vapors are inversely proportional to the boiling point that means lesser the boiling point better will be the evaporation.

Intermolecular forces are the forces present between the molecules and liquid’s vapor pressure is directly related to the intermolecular forces as well . The stronger these forces, the lower the rate of evaporation and the lower the vapor pressure.

Therefore, the relationship between the vapor pressure of a liquid and how well it cools by evaporation is having direct proportionality.

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The concentration of the HBr solution is 0.125 M.

The given solution is a 53.65 ml solution of HBr that is completely titrated by 33.50 ml of a 0.200 M NaOH solution.

This implies that all of the HBr present in the solution is neutralized by NaOH, and therefore, the number of moles of HBr is equal to the number of moles of NaOH.

The balanced chemical equation for the reaction:HBr(aq) + NaOH(aq) → NaBr(aq) + H2O(l)The stoichiometric ratio of HBr to NaOH in this reaction is 1:1.

This means that one mole of HBr reacts with one mole of NaOH to form one mole of NaBr and one mole of water.

We can use the given information to determine the number of moles of NaOH that were required to neutralize the HBr. The molarity of the NaOH solution is given as 0.200 M.

This means that there are 0.200 moles of NaOH in every liter of solution.

Therefore, the number of moles of NaOH used in the titration is:moles of NaOH = molarity × volume in liters= 0.200 M × (33.50/1000) L= 0.0067 mol

Since the stoichiometric ratio of HBr to NaOH is 1:1, the number of moles of HBr that were neutralized by the NaOH is also 0.0067 mol.

This means that the concentration of the HBr solution can be calculated as follows:concentration of HBr = moles of HBr / volume of HBr solution in liters= 0.0067 mol / (53.65/1000) L= 0.125 M

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Polymers are large molecules made up of many smaller molecules, known as monomers, linked together in a chain. The intermolecular forces between the molecules in a polymer can have a significant impact on its properties. The most commonly encountered intermolecular forces in polymers are London dispersion forces, dipole-dipole interactions, and hydrogen bonding.

London dispersion forces are the weakest of the three, but are still important for many polymers. Dipole-dipole interactions occur when the partial charges of the molecules line up and create a dipole. Hydrogen bonding occurs when hydrogen atoms form a strong bond with another atom, usually oxygen, nitrogen, or fluorine. These forces are responsible for the strength and flexibility of the polymer and play a role in how the polymer behaves in different situations.

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We can say about the reaction that ()The system is spontaneous as written.

To calculate ΔG, we can use the formula ΔG = ΔH - TΔS, where T is the temperature in Kelvin.

First, we need to convert ΔS from J/K to kJ/K, so ΔS = -25.0 J/K = -0.025 kJ/K.

Then, we can plug in the values:

ΔG = -111.4 kJ - (298 K)(-0.025 kJ/K)

ΔG = -111.4 kJ + 7.45 kJ

ΔG = -103.95 kJ

Since ΔG is negative, the reaction is spontaneous as written.

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Explanation:

solution 1) homogeneous

2) do not scatter light

3) cannot be separated by filtration

Colloids 1) heterogeneous

2) scatter light

3) cannot be separated by filtration

suspension 1) heterogeneous

2) may either scatter light or be opaque

3) can be separated by filtration

Gasohol is a blend of gasoline and ethanol. To determine the maximum work that can be obtained by burning 1.003 mol of C2H5OH at 25°C and 1 atm, the Gibbs free energy equation can be utilized. What is Gibbs free energy equation? Gibbs free energy equation is a thermodynamic equation that quantifies the maximum quantity of work that may be obtained during a chemical reaction. T

he equation is as follows: ΔG = ΔH - TΔSThe values of ΔH and ΔS are calculated from thermodynamic tables or by calculating the enthalpy and entropy of the products and reactants, and the temperature, T, is usually specified in Kelvin. The change in Gibbs free energy, ΔG, is the maximum amount of energy that can be obtained from the reaction in the form of useful work if the reaction takes place at constant pressure and temperature. The reaction will proceed spontaneously if ΔG is negative. And if ΔG is positive, the reaction will not take place spontaneously. The solution to this problem is shown below:

First, let's figure out how much heat is produced when one mole of C2H5OH is burnt.ΔHrxn = [2(moles of CO2)(-393.5 kJ/mol) + 3(moles of H2O)(-285.8 kJ/mol)] - [(moles of C2H5OH)(-277.7 kJ/mol)]ΔHrxn = [2(2.006 mol)(-393.5 kJ/mol) + 3(3.009 mol)(-285.8 kJ/mol)] - [1.003 mol(-277.7 kJ/mol)]ΔHrxn = -2043.5 kJ/mol. Now, we'll figure out the entropy change for the reaction.ΔSrxn = [2(moles of CO2)(213.8 J/mol-K) + 3(moles of H2O)(69.9 J/mol-K)] - [(moles of C2H5OH)(160.7 J/mol-K)]ΔSrxn = [2(2.006 mol)(213.8 J/mol-K) + 3(3.009 mol)(69.9 J/mol-K)] - [1.003 mol(160.7 J/mol-K)]ΔSrxn = -104.3 J/mol-KThe temperature in Kelvin is 25°C.273 + 25 = 298 KΔG = ΔH - TΔSΔG = -2043.5 kJ/mol - (298 K)(-104.3 J/mol-K)/1000ΔG = -2032.6 kJ/mol. Therefore, the maximum work that can be obtained by burning 1.003 mol of C2H5OH is 2032.6 kJ/mol, which is the value of ΔG.

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Answer:

it's volume also decrease

The ions that is most likely to be leached from the soil is the correct option is B) chlorine ions.

The Chlorine ions are the negatively charged ions and are this is the reason it is not likely to be bound to the negatively charged soil particles. The Chlorine kills most of the microbes in the soil. Making the worm tea with the chlorinated water that defeats the purpose of the worm tea.

The Leaching occurs as the excess water removes the water - soluble nutrients out of the soil, by the runoff or the drainage. The Leaching is the environmental problem for the agricultural professionals.

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Answer:

its viscosity will decrease.

Explanation:

Corn syrup has high viscosity and used as a sweetener in foods. Corn syrup is formed by the hydrolysis of cornstarch that includes glucose, maltose and other substances.

Viscosity and temperature are inversely proportional to each other. it means if the Corn syrup having high viscosity will be heated up, its viscosity will decrease because when a liquid is heated up, its molecules start moving faster and break the forces that bind the molecules together and loses its viscosity.

Hence, the correct answer is "its viscosity will decrease."

Answer:

B. Lu

Explanation:

If you look at the small number under each abbreviation Lu has the largest number

There are various kind of elements that are present in periodic table. Some elements are harmful, some are radioactive, some are noble gases. The correct option is option B.

Periodic table is a table in which we find elements with properties like metals, non metals, metalloids and radioactive element arranges in increasing atomic number.

Periodic table help a scientist to know what are the different types of elements are present in periodic table so that they can discover the new elements that are not being discovered yet.

The order of  lanthanide elements in increasing order of atomic number Ce, Eu, Dy, Lu. So Lu is the element whose atomic number is the highest. Atomic number is equals to the number of protons.

Therefore, Lu is the lanthanide elements that has the highest number

of protons. The correct option is option B.

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Mineral resources can play a significant role in determining the success or failure of a town will boom or become a ghost town is important because the presence or absence of valuable minerals can significantly impact the town's economic growth and sustainability.

Mineral resources are valuable commodities that can bring economic growth and development to a town. Towns that are rich in mineral resources, such as gold, silver, copper, and coal, often experience a boom in their economy as mining companies invest in the area and provide job opportunities for the local population. This influx of income can lead to increased business activity, higher property values, and improved infrastructure, all of which contribute to the overall prosperity of the town.

If a town has abundant and easily accessible mineral resources, it can attract mining industries, creating job opportunities and stimulating the local economy. This can lead to a population increase, more businesses, and overall economic growth, resulting in a booming town. On the other hand, if mineral resources are scarce or depleted, mining industries may leave, leading to job loss and economic decline. This can cause people to move away in search of better opportunities, leaving behind abandoned buildings and infrastructure, ultimately turning the town into a ghost town.

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The required force is 280 N.

We must subtract our individual forces in order to calculate the net force.

In general, whenever forces act on an object in opposite directions-the net force is equal to the difference between the two forces.

To calculate the net force, one force is subtracted from the other. therefore, here

325 N is force 1 to the right.

45 N is force 2 to the left.

Force 1 - Force 2 is the net force.

net force= 325N - 45N

net force= 280 N

So the required force is 280 N.

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The net force of the runner would be 280 N.

Hope this helps! Also, if you need help with the other questions regarding this assignment, feel free to check out the study set I made on Quizlet. Thanks and good luck!

Quizlet - "Unit 6: Lesson 2 Newton's First Law QC"

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