What is the major organic product obtained from the following sequence of reactions? 1. LIAIH 2. H20 1. LDA, -78°C он 2. О CH CHs Ph 3. Hyo

Answer:

C

Explanation:

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When substance B is doubled no change is found in the rate of the reaction because it is not involved in the rate-determining step of the mechanism, but is involved in subsequent steps.

According to the law of mass action,

"The rate of the reaction is directly proportional to the active concentration of the reactant which each have raised powers to the experimentally determined coefficients which are known as orders". The rate of the reaction is determined by the slowest step in the reaction mechanics.

Order of in the mass action law is the coefficient which is raised to the active concentration of the reactants. It is experimentally determined and can be zero, positive, negative or fractional.

The sum of the orders of each reactant which is raised to its power is the order of the whole reaction and the law is known as the rate law.  

The change in the concentration of B does not affect the rate of the reaction as B is the reactant. Hence, the order of B must be zero.

Hence, substance B is not involved in the rate-determining step of the reaction, but is involved in subsequent steps of the reaction.

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Answer:

First Part: branched chain, cycloalkane, straight chain

Second Part: straight chain, branched chain, cycloalkane.

Explanation:

Edg 2021

Answer:

Explanation:

Answer:

30 centimeters

Explanation:

I really hope you meant centimeters or I'm gonna look pretty dumb

Explanation:

Plasma is an ionized gas, a distinct fourth state of matter. “Ionized” means that at least one electron is not bound to an atom or molecule, converting the atoms or molecules into positively charged ions.but plasma is present in human body too in a liquid form.

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If you decide mineral D was the softest mineral of this group  you would place it on line are ;G ___1___, A ___2___, B ___3___, E ___4___, F ___5___, C ___6___,D ___7___.

Mineral is an inorganic naturally occurring substance formed through geological processes that has a characteristic chemical composition, a highly ordered atomic structure, and specific physical properties. Minerals are not created by living organisms and are not biodegradable. There are over 4,000 known minerals on Earth, with new ones being discovered every day. They can be found in rocks, soils, and even in bodies of water. Minerals can be divided into two main categories: metallic and non-metallic. Metallic minerals are characterized by their shiny appearance, while non-metallic minerals are dull in appearance.

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False

complete combustion produces carbon dioxide + water

Answer:

P₂ = 1.5 atm

Explanation:

Given data:

Initial volume = 270 cm³

Initial pressure = 1atm

Final volume = 180 cm³

Final pressure = ?

Solution:

The given problem will be solved through the Boyle's law,

"The volume of given amount of gas is inversely proportional to its pressure by keeping the temperature and number of moles constant"

Mathematical expression:

P₁V₁ = P₂V₂

P₁ = Initial pressure

V₁ = initial volume

P₂ = final pressure

V₂ = final volume  

Now we will put the values in formula,

P₁V₁ = P₂V₂

1 atm × 270 cm³= P₂ × 180cm³

P₂ = 270 atm.  cm³/ 180cm³

P₂ = 1.5 atm

Answer:

Depending on the environment, the more favorable trait will survive while the other dies off. For example, on the light colored tree, the dark moths are easily seen, allowing the birds to eat them. The birds can’t see the light colored moths that well because they can camouflage. The moth populations change, illustrating the effects of natural selection. There will be more light colored moths in a lighter environment. This will increase the population of light colored moths because they are able to reproduce and thrive in the environment. This is the same with dark colored moths in a dark environment.

Explanation:

Pattern: Volcanoes and earthquake zones are often found in close proximity to each other, with earthquake zones appearing as long lines on the globe.

The pattern can be attributed to the tectonic plate boundaries. Volcanoes are typically located along plate boundaries where there is subduction or collision of tectonic plates. These areas experience intense geological activity, leading to volcanic eruptions. Earthquake zones, represented by long lines on the globe, coincide with plate boundaries as well. The lines correspond to the locations where plates interact, resulting in significant stress and release of energy, leading to seismic activity. The long lines represent the interconnectedness of multiple earthquake-prone areas along the plate boundaries, forming seismic belts or zones. Therefore, the close proximity of volcanoes and earthquake zones can be explained by their shared association with tectonic plate boundaries and the geologically active regions that result from plate interactions.

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The statement which correctly describes the reactants and products of a chemical reaction is: A. The mass of the reactants must be equal to the mass of the products. The total number of moles of the reactants can be more or less than the total number of moles of the products.

LOCOM is an abbreviation for the law of conservation of mass and it states that mass is neither created nor destroyed in any chemical reaction. Thus, the mass of any substance in a balanced chemical equation would remain the same at the end.

According to the law of conservation of mass (LOCOM), the mass of all the reacting chemical elements of any substance (reactants) must be equal to the mass of the product formed during a chemical reaction.

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Answer: Tetonic plates

Explanation: just because

Zoloft (sertraline) comes under Selective serotonin reuptake inhibitor (SSRI) antidepressants

Mellaril (thioridazine) comes under Typical antipsychotics

Thorazine (chlorpromazine)comes under Typical antipsychotics

Valium (diazepam)comes under Anti-anxiety agents

By raising serotonin levels in the brain, SSRIs alleviate depression. One of the chemical messengers, or neurotransmitters, that communicate between brain nerve cells is serotonin (neurons). Serotonin reabsorption (reuptake) into neurons is inhibited by SSRIs.

Typical antipsychotics can be used to treat conditions like extreme agitation or schizophrenia.

a medication used to alleviate anxiety symptoms such the fear, dread, unease, and tightness in the muscles that can happen when under stress. The majority of anti-anxiety medications prevent particular nervous system molecules from acting. Additionally known as anxiolytic and anxiolytic agent.

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Answer:

94.4 Psi

Explanation:

Given that;

P1 = 105 psi

T1 = 25˚C + 273 =  298 K

P2 = ?

T2 = – 5˚C + 273 = 268 K

P1/T1 = P2/T2

P1 T2 = P2T1

P2 = P1T2/T1

P2 = 105 * 268/298

P2= 94.4 Psi

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A statement would be issued to Westfield residents stating the findings of the Reddish-Brown Substance as well as addressing the various claims.

Dear residents of Westfield,

We are writing to inform you about the recent discovery of a reddish-brown substance found in the water supply. After conducting a series of tests and observations, we have determined the identity of the substance.

Firstly, we examined the pipes in the water supply system and found that the reddish-brown substance was present in the pipes. Through analysis of the atomic-scale models, we were able to confirm that the substance found in the pipes is identical to the substance found in the water. Therefore, we make the claim that the reddish-brown substance is the same as the substance that makes up the pipes.

We also investigated whether the reddish-brown substance could be related to the fertilizer used in local agricultural practices. However, after conducting chemical analysis, we found that the reddish-brown substance does not match the composition of the fertilizer. This leads us to conclude that the reddish-brown substance is not the same as the fertilizer.

In conclusion, the reddish-brown substance found in the water supply is not the same as the substance that makes up the pipes or the fertilizer used in local agricultural practices. We apologize for any concern this may have caused and assure you that steps are being taken to address the issue.

Thank you for your attention,

Dr. Yung and team.

That is how the letter should be addressed.

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The balanced chemical equation is:

0.5C7H16 + O2 → 0.5CO2 + H2O

For balancing the chemical equation C7H16 + O2 → CO2 + H2O, we can use linear algebraic techniques. We need to determine the coefficients that balance the number of atoms on both sides of the equation.

Let's denote the coefficients for C7H16, O2, CO2, and H2O as a, b, c, and d, respectively.

The balanced chemical equation can be written as:

aC7H16 + bO2 → cCO2 + dH2O

To balance the carbon (C) atoms, we have:

7a = c (Equation 1)

To balance the hydrogen (H) atoms, we have:

16a = 2d (Equation 2)

To balance the oxygen (O) atoms, we have:

2b = 2c + d (Equation 3)

We have three equations (Equations 1, 2, and 3) and four unknowns (a, b, c, d). To solve this system of equations, we can write it in matrix form and find the solution using linear algebraic techniques.

The augmented matrix for the system of equations is:

[ 7 0 -1 0 | 0 ]

[ 0 0 0 -2 | 0 ]

[ 0 -2 2 -1 | 0 ]

By performing row operations to row-reduce the augmented matrix, we can obtain the solution:

[ 1 0 -0.5 0 ]

[ 0 1 -1 -0.5 ]

[ 0 0 0 0 ]

The solution to the system of equations is:

a = 0.5

b = 1

c = 0.5

d = 1

Putting the values of a,b,c, and d we get the balanced chemical equation as:

0.5C7H16 + O2 → 0.5CO2 + H2O

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Answer:

54.72 g

Explanation:

Mass = ?

Volume = 5.61 L

Pressure = 5.66 atm

Temperature = 311 K

The relationship between these equations is given by the ideal gas equation;

PV = nRT

where R = gas constant = 0.0821 atm L K-1 mol-1

n = PV / RT

n = 5.66 * 5.61 / (0.0821 * 311 )

n = 1.2436 mol

Number of moles = Mass / Molar mass

Mass = Number of moles * Molar mass = 1.2436 * 44 = 54.72 g

The correct order of decreasing acid strength for the acids lactic acid (LA), oxalic acid (OA), and malic acid (MA) is option B: LA > MA > OA.

The acid strength of an acid is determined by its tendency to donate a proton (H+ ion). The pKa value is a measure of the acidity of an acid, with lower pKa values indicating stronger acids.

In this case, the given pKa values for lactic acid (LA), oxalic acid (OA), and malic acid (MA) are LA = 3.88, OA = 1.23, and MA = 3.40.

Comparing the pKa values, we see that OA has the lowest pKa value (1.23), indicating that it is the strongest acid among the three. LA has a higher pKa value (3.88), making it weaker than OA but stronger than MA. Finally, MA has the highest pKa value (3.40), making it the weakest acid among the three.

Therefore, the correct order of decreasing acid strength is LA > MA > OA, as stated in option B.

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When holding food without temperature control, it is essential to mark the food to indicate its time of preparation or removal from temperature control. This practice is crucial for food safety and helps prevent the growth of harmful bacteria that can cause foodborne illnesses.

Marking the food provides a clear visual indication of how long it has been held at room temperature or in a potentially unsafe temperature range. The marking typically includes the date and time of preparation or removal from temperature control. This information allows food handlers and consumers to assess the freshness and safety of the food.

By implementing a clear marking system, it becomes easier to identify when the food should be discarded if it has exceeded the recommended time for holding without temperature control. This helps to prevent the consumption of potentially hazardous food that may have become contaminated or spoiled due to prolonged exposure to unsafe temperatures.

The marking also aids in proper rotation and inventory management. By indicating the time of preparation or removal from temperature control, food handlers can ensure that older items are used or discarded first, reducing the risk of serving expired or unsafe food to customers.

Additionally, marking the food provides a level of accountability and traceability. In the event of a foodborne illness outbreak or food safety inspection, having clear and accurate markings can assist in identifying the source of the issue and implementing corrective actions.

Overall, marking food that is held without temperature control is a crucial practice for maintaining food safety. It helps prevent the consumption of potentially hazardous food, aids in inventory management, and provides accountability and traceability in the event of food safety incidents.

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Answer:

Zero-Nine

Explanation:

this is becasue these numbers are rather small and if you plug these numbers into an equation you will most likely get 0.

Good Conductors ;

copper, gold, aluminum, steel

Poor Conductors ;

glass ,rubber, wood, plastic,

Steel and bronze have the lowest heat conductivity, while metals like copper and aluminum have the highest. Copper is a good material for heat exchangers because it is a good heat conductor. Examples of effective electrical and heat conductors are gold, silver, and iron.

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Answer:

A decomposition reaction occurs when one reactant breaks down into two or more products. This can be represented by the general equation: AB → A + B. Examples of decomposition reactions include the breakdown of hydrogen peroxide to water and oxygen, and the breakdown of water to hydrogen and oxygen.

Explanation:

decomposition reaction occurs when one reactant breaks down into two or more products. This can be represented by the general equation: AB → A + B. Examples of decomposition reactions include the breakdown of hydrogen peroxide to water and oxygen, and the breakdown of water to hydrogen and oxygen

The basic steps of the Carbon Cycle involve carbon dioxide uptake by plants through photosynthesis, transfer of carbon through the food chain, release of carbon back into the atmosphere through respiration and decomposition, and long-term storage of carbon in fossil fuels and other geological formations.

Concentrations of atmospheric and terrestrial carbon can fluctuate due to natural processes and human activities, such as deforestation and burning of fossil fuels. The Carbon Cycle begins with plants absorbing carbon dioxide from the atmosphere through photosynthesis. This carbon is converted into organic compounds and transferred through the food chain as organisms consume plants or other organisms. The carbon is released back into the atmosphere through respiration and decomposition.

Terrestrial carbon can be stored for varying lengths of time. Some carbon returns to the atmosphere relatively quickly, while some may be stored in plant material, soils, or detritus for longer periods. Additionally, carbon can be sequestered in geological formations over millions of years, forming fossil fuels like coal, oil, and natural gas.

Fluctuations in atmospheric and terrestrial carbon concentrations can occur due to natural processes and human activities. Natural factors such as volcanic eruptions and wildfires release carbon into the atmosphere, while the growth of forests and other plant life can remove carbon dioxide from the air.

Human activities, particularly the burning of fossil fuels and deforestation, have significantly increased carbon dioxide levels in the atmosphere, leading to climate change. These activities disrupt the natural balance of the Carbon Cycle, causing an accumulation of carbon dioxide and contributing to global warming.

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Answer:

B

Explanation:

Economic principles has nothing to do with biome determination.

If the threshold energy of the reaction 2016O(n, γ) 170 is 15.6 MeV, then the atomic mass of 170Ol can be calculated.

Given:Atomic mass of Ol (15.996415 amu)Atomic mass of neutron (1.008665 amu)M (Ol) = 15.996415 amuM (neutron) = 1.008665 amu Threshold energy of the reaction, E = 15.6 MeV The threshold energy (E) is the minimum amount of energy that an incoming neutron must have to trigger the nuclear reaction or the amount of energy that is needed to supply for the reaction to proceed.

The atomic mass of 170Ol can be calculated as follows:E = [M (n) + M (2016O) - M (170O)] x c²Where c = speed of light, M (n) = mass of neutron, M (2016O) = mass of oxygen-16M (170O) = mass of the oxygen-17, the product of the reaction.Rearranging the above equation:  M (170O) = [M (n) + M (2016O) - E/c²]Thus, M (170O) = [1.008665 + 15.994915 - (15.6 x 10⁶ eV/ (3.0 x 10⁸ m/s)²)] amuM (170O) = 16.98803 amuTherefore, the atomic mass of 170Ol is 16.98803 amu.

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In the context of studying the impact of training on salesperson performance, salesperson sales would be the dependent variable, and the salesperson exam score would be the independent variable.

The correct option is D. dependent, independent

The dependent variable is the variable that is being measured or observed to assess the outcome or effect of an intervention or treatment. In this case, the impact of training on salesperson performance is being studied, and salesperson sales would be the outcome or dependent variable. It is the variable that is expected to change as a result of the training.

On the other hand, the independent variable is the variable that is manipulated or controlled by the researcher. It is the variable that is believed to have an effect on the dependent variable. In this scenario, the salesperson exam score is the independent variable. It is the variable that is used as a measure of salesperson performance before or after the training intervention.

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The element that is most likely to pair with beryllium in a 1:1 relationship based on valence electron trends would be Se ( 6 valence electrons ). That is option A.

Valence electron is defined as the electron of an atom that is located at the outermost shell which takes part in formation of chemical bonding during a chemical reaction.

The number of Valence electron of the element beryllium = 2

The number of Valence electron of the selenium = 6

Therefore, both beryllium and selenium can form a chemical bond in a 1:1 relationship based on valence electron trends as both will complete their outer most shell into 8 electrons.

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