at a constant temperature, a sample of a gas in a balloon that originally had a volume of 2.2 l and pressure of 749 torr has a change of pressure to 629 torr. calculate the new volume in liters. group of answer choices 2.62 2.2 1.85 264.00 0.02
Answers
The new volume of the sample of a gas in a balloon is 2.62 L.
To solve this problem, we will use Boyle's Law, which states that at a constant temperature, the pressure and volume of a gas are inversely proportional. The equation for Boyle's Law is P₁V₁ = P₂V₂, where P₁ and V₁ represent the initial pressure and volume, and P₂ and V₂ represent the final pressure and volume.
In our case,
P₁ = 749 torr
V₁ = 2.2 L
P₂ = 629 torr
We need to find V₂. To do this, we will rearrange the Boyle's Law equation to solve for V₂: V₂ = (P₁V₁) / P₂.
Now, we can plug in the given values:
V₂ = (749 torr × 2.2 L) / 629 torr
V₂ ≈ 2.62 L
The new volume of the gas in the balloon is approximately 2.62 liters. So, the correct answer from the provided choices is 2.62.
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Related Questions
How does examining past data help prepare people for feature weather hazards?
Answers
Answer:
It lets people prepare for future weather hazards:
- If, in certain months and on certain dates, the past data shows that there's a history of rain or heat stroke on those days, people can prepare in the future for those events.
- They can also expect wind speeds, temperatures and stuff like that!
Describe and explain the significance of research published by
F.S. Rowland in 1991 titled Stratospheric ozone in the
21st century: the chlorofluorocarbon problem?
Answers
The research titled "Stratospheric Ozone in the 21st Century: The Chlorofluorocarbon Problem" by F.S. Rowland was published in the journal Science in 1991. The study's significance is evident in the way it paved the way for global action on the depletion of the ozone layer.
The study outlined the link between chlorofluorocarbons (CFCs) and the depletion of the ozone layer in the stratosphere. These chemicals have long been utilized in refrigerants, air conditioning systems, foam insulation, and various industrial applications. They have been shown to destroy ozone molecules when they rise to the stratosphere, allowing ultraviolet radiation to penetrate the Earth's atmosphere. Rowland's research proved beyond a doubt that human activity is significantly affecting the ozone layer, resulting in an increased risk of skin cancer, blindness, and other problems associated with exposure to UV radiation.
The research is vital in the sense that it helped to initiate international agreements, such as the Montreal Protocol, aimed at phasing out the use of CFCs. These agreements have been instrumental in lowering the production and use of CFCs, resulting in a reduction in the depletion of the ozone layer. As a result, the world has benefited from a decrease in the risks associated with exposure to UV radiation. In conclusion, Rowland's research was groundbreaking in the sense that it confirmed the link between CFCs and ozone depletion, providing a basis for a global reaction to this critical problem.
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What are the names of the 2 proteins the membrane needs to move necessary molecules passively into the cell?
Answers
Answer:
The lipid bilayer forms the basis of the cell membrane, but it is peppered throughout with various proteins. Two different types of proteins that are commonly associated with the cell membrane are the integral protein and peripheral protein ( Figure 3.1.2 ). As its name suggests, an integral protein is a protein that is embedded in the membrane.
Explanation:
hoped this helped! <3 A brainiest is always appreciated! if this helped give a thanks and rating, i always try to reply to comments! have a nice day :)
Which of the following is true for the equilibrium constant of a reaction? (5 pc
OIts value remains constant at different temperatures.
It is a ratio of coefficients of reactants to products.
It is represented by the symbol K.
Its value is always less than 1.
Answers
The equilibrium constant of the reaction is represented by the symbol K. Thus, option C is the correct and accurate statement about the equilibrium constant.
What is the equilibrium constant?The equilibrium constant is a representation of the concentration of the products and the reactants of the reaction that is raised to the powers through their stoichiometry coefficient.
Its value varies and changes at different temperatures and is not always less than 1. The equilibrium constant is the ratio of the coefficient of the products to reactants.
Therefore, option C. equilibrium constant is represented by K is true.
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Which of the following is the same as 1.30 x 10-5?
0.00130
O 130,000
O 130
0.000013
Answers
Answer:
who's asking?
Explanation:
If you flow a solution of Mg CO3-- in water over a Cation resin, what will be in the outlet stream leaving the bed
Answers
In a a cation-exchange resin, the outlet stream leaving the bed will contain \(H^{+}\) and \(CO_3 ^{2-}\).
What is cation-exchange resin?A resin or polymer that serves as a medium for ion exchange is known as an ion-exchange resin or cation-exchange resin.It is an insoluble matrix (or support structure) made from an organic polymer substrate, typically appearing as tiny (0.25-1.43 mm radius) microbeads that are white or yellowish in color.The process is known as cation-exchange resin because the beads are often porous, providing a wide surface area on and inside them where the trapping of ions takes place along with the concomitant release of other ions.cation-exchange resin comes in many different varieties. Polystyrene sulfonate is the main ingredient in most commercial resins. Many diverse separation, purification, and decontamination techniques use cation-exchange resin.The most typical examples are water filtration and water softening.To learn more about cation-exchange resin with the given link
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two molecules with the same structural formula must have:
Answers
Does water evaporates only from the sea
Answers
no it does not
you have a 3.0 g of solid magnesium metal in 250 ml of 1.0mol/l hydrochloric acid solution that is in the beaker. you place a large gas collecting tube over the magnesium and vollect the product, hydrogen gas. assume all the conditions at the lab are SATP.
a) write a chemical balanced equation
b) calculate the number of theoretical moles of hydrogen that should be reduced in this reaction.
c) calculate the volume of hydrogen gas produced. remember that the gas is collected over water.
d) you now quickly do a burning splint test on the hydrogen. jt reacts with just enough oxygen in the gas collecting tube to produce liquid water. what mass of liquid water is produced? (new balanced equation)
Answers
Answer:
a)Mg(s) + 2HCl(aq) -------> MgCl2(aq) + H2(g)
b) 0.125 moles of hydrogen gas is reduced in the reaction.
C) 3.18 L
d)2.25 g of water
Explanation:
a) the equation of this reaction is;
Mg(s) + 2HCl(aq) -------> MgCl2(aq) + H2(g)
b)
Number of moles= concentration × volume= 1.0 × 250/1000 = 0.25moles of HCl
From the equation;
2 moles of HCl yields 1 mole of hydrogen gas
Hence 0.25 moles of HCl yields 0.25 × 1/2 = 0.125 moles of hydrogen gas
Thus 0.125 moles of hydrogen gas is reduced in the reaction.
c)
P= 760 mmHg (standard pressure)
V= ????
T= 298 K
n= 0.125 moles
R= 0.082 atm dm-3K-1mol-1
Since the gas is collected over water, SVP of hydrogen at 25°c is 28mmHg
Therefore; P=760-28= 732mmHg
But
1 atm =760 mmHg
Therefore 732 mmHg= 732/760= 0.96 atm
PV=nRT
V= nRT/P
V= 0.125 × 0.082 × 298/0.96
V= 3.18 L
Note 1dm-3=1L
d)
2H2(g) + O2(g) ----> 2H2O(g)
From the equation;
2 moles of hydrogen yields 2 moles of water
0.125 moles of hydrogen yields 0.125 moles of water
Mass of water = 0.125 moles × 18gmol-1 = 2.25 g of water
What best describes prototypes that we create as part of interactive system design in HCI? Select all that apply.
Answers
The following options best describe prototypes that we create as part of interactive system design in HCI:
They are simplified versions of the final product that help us understand and communicate design ideas and user requirements.
They are used to test and evaluate design decisions and identify potential problems and issues before the final product is built.
They can take various forms, such as sketches, wireframes, mockups, or working prototypes, depending on the stage of the design process and the goals of the evaluation.
They can be modified and refined based on feedback and testing results, which allows for iterative and incremental design improvements.
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a material that resists a change in ph is called a(n) _____.
Answers
A material that resists a change in pH is called a(n) buffer.
Buffers maintain a stable pH level by neutralizing added acids or bases, thus preventing drastic changes in the pH of a solution. They are essential in many biological systems and laboratory applications. Buffers minimize pH shifts by reacting with extra acids or bases that are introduced to a solution. They do this by conducting chemical processes that absorb or release protons, assisting in the maintenance of the system's overall pH.
A solution's pH resistance is referred to as its buffer capacity. The concentrations of the weak base and its conjugate acid (or weak acid and its conjugate base) in the solution are what determines it. Generally speaking, a higher buffer component concentration yields a larger buffer capacity.
In summary, a material that resists a change in pH is known as a buffer. Buffers are composed of a weak acid and its conjugate base or a weak base and its conjugate acid, and they help maintain the stability of pH in different systems.
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What is the Al3+:Ag+concentration ratio in the cell Al(s) | Al3+(aq) || Ag+(aq) | Ag(s) if the measured cell potential is 2. 34 V? Please show work
A) 0. 0094:1
B) 0. 21:1
C) 4. 7:1
D) 110:1
Answers
To determine the \(Al_3^+:Ag^+\) concentration ratio in the electrochemical cell, the Nernst equation is used. By solving the equation, the ratio is found to be 1/27, which corresponds to option A (0.0094:1).
To determine the \(Al_3^+:Ag^+\) concentration ratio in the given electrochemical cell, we need to use the Nernst equation, which relates the cell potential (Ecell) to the concentrations of the species involved. The Nernst equation is given by:
Ecell = E°cell - (RT/nF) * ln(Q)
In this case, the balanced redox equation is:
\(Al(s) + 3Ag+(aq)\) → \(Al_3+(aq) + 3Ag(s)\)
The number of electrons transferred (n) is 3.
Since the reaction is at standard conditions (25°C), we can assume that E°cell = 0.59 V (retrieved from standard reduction potentials).
Plugging the values into the Nernst equation:
2.34 V = 0.59 V - (8.314 J/(mol·K) * (298 K) / (3 * 96485 C/mol) * ln(Q)
Simplifying the equation:
1.75 V = ln(Q)
Taking the exponential of both sides:
\(Q = e^{(1.75)}\)
Now, Q represents the concentration ratio of products to reactants. The ratio of \(Al_3^+\) to \(Ag^+\) is 1:3, based on the balanced equation. Therefore:
\(Q = [Al_3^+]/[Ag^+]^3 = 1/3^3 = 1/27\)
Comparing this to the options given, the closest ratio is 0.0094:1 (option A).
Therefore, the correct answer is A) 0.0094:1.
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Hypothesis: If a material undergoes a
chemical change, then it will not retain its
original properties because a new substance
is formed.
To test the hypothesis above, you will observe the
changes during the experiment.
To do this, you will use these observations to
compare the___
of the
substances
to the__
substances.
of the
Answers
Answer:
I hate to not answer and have you repost this if you could repost it with the choices by clicking the arrow I can figure it out a lot faster and I'll copy and paste to show you that it's right
Explanation:
I'm good with history biology sum math so if you want to do what I asked and reposted I can give you the answers and I will show that they are correct I won't just guess like some people do just to get points cuz I don't care about points I just get on here to help people
Answer: The answer for the blanks is initial appearance and than final appearance.
Explanation:
What is a paper clip, a colloid? solution? or a suspension?
Answers
Answer:
I'm gonna guess it's a suspension
Explanation:
let me know if I'm wrong
1) List the following sets of quantum numbers in order increasing energy:
I . n=4, / = 1, m/=1, ms = +1/2
II. n=3, /=2, m/= -1, ms = +1/2
III. n=4, / =0, m/ = 0, ms = +1/2
Answers
The increasing energy order of the quantum numbers is III < II < I.
What are quantum numbers?There are a total of four quantum numbers in atoms: primary quantum number (n)orbital angular momentum quantum number (l), magnetic quantum number (ml), electron spin quantum number (ms). However, other possibilities include angular momentum, spin, etc. Quantum numbers frequently specifically characterize the energy levels of electrons in atoms. Flavour quantum numbers, which are internal quantum numbers that determine a particle's kind and how it interacts with other particles using basic forces, are a significant family of quantum numbers. It is challenging to compile a list of all conceivable quantum numbers because any quantum system can have one or more quantum numbers.Here, the increasing energy order of the sets of quantum numbers is III < II < I.To learn more about quantum numbers, refer:
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Carrie is making a presentation on solar winds. Her notes of the steps that must occur for solar winds to form are below. 1. The stream of electrically charged particles collide with gas atoms, causing the latter to give off light. 2. The electrically charged particles flow outward in all directions as far as Saturn. 3. The stream of electrically charged particles flows outward from the corona. 4. The particles of the solar wind flow along lines of the magnetic field. Which shows the correct sequence in the formation of solar winds? 1, 2, 3, 4 2, 3, 4, 1 3, 2, 4, 1 4, 2, 1, 3
Answers
Answer: 1, 3,4,2
Explanation: Solar Wind is a stream of charged particles, called Plasma, released from the surface of the sun. It is formed by the expansion of plasma from the Sun's outermost surface, known as Corona.
Inside the Sun, 4 atoms of hydrogen transform into Helium by a nuclear reaction called Fusion. This reaction produces energy, which travels to the surface. There, it decomposes into plasma, where it continues to heat up.
When the Sun's gravity can't hold it down, the gas streams along the Sun's magnetic field line. Because of the rotation of the Sun, the lines form huge spiral, creating a constant flow of "wind". They extend so far, it generates an interplanetary magnetic field (IMF), which surrounds all the planets in our solar system.
percent composition by mass of potassium in potassium carbonate
Answers
Answer:
56.58 percent
5.0 g of copper was heated from 20°C to 80°C. How much energy was used to heat Cu? (Specific heat capacity of Cu is 0.38 J/g °C)
Answers
114°
Explanation:
ΔE = mcΔT
ΔE = 5(0.38)(80 - 20)
ΔE = 1.9(60)
ΔE = 114°
43a you are told that you have the option to add activated carbon (charcoal) to your recrystallization solution. why is it used?
Answers
Activated carbon, also known as charcoal, is commonly used in recrystallization because it is highly porous and has a large surface area that can effectively trap impurities.
This makes it an excellent adsorbent for organic contaminants, residual solvents, and other unwanted substances in the recrystallization solution. The addition of activated carbon to the solution prior to recrystallization helps to purify the desired compound and improve the overall yield of the reaction. Additionally, activated carbon is a highly effective filter that can remove any discoloration, odors, or other impurities that may be present in the solution. By improving the purity of the recrystallization solution, activated carbon can help to ensure that the final product is of a higher quality and has more consistent properties.
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Rank the layers of the atmosphere based on the energy of the photons that are typically emitted there, from highest to lowest.
Answers
The layers of the atmosphere can be ranked based on the energy of the photons that are typically emitted there, from highest to lowest as Thermosphere,Mesosphere,Stratosphere and Troposphere respectively.
Based on the energy of the photons typically emitted, the layers of the atmosphere can be ranked as follows:
1. Thermosphere: This layer has the highest energy of photons as it is the region where the sun's radiation is absorbed and ionizes the gas particles. This ionization process releases high-energy photons, including ultraviolet and X-rays.
2. Mesosphere: This layer has a lower energy of photons than the thermosphere. It is the region where meteoroids burn up upon entering the Earth's atmosphere, releasing photons in the form of light.
3. Stratosphere: This layer has a lower energy of photons than the mesosphere. It is the region where ozone is present, which absorbs high-energy ultraviolet radiation from the sun and emits lower energy photons in the form of heat.
4. Troposphere: This layer has the lowest energy of photons as it is the region closest to the Earth's surface and is primarily heated by convection from the ground. The photons emitted here are primarily in the form of infrared radiation.
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1A. All weak acids have _ than _
1B. All weak bases have _ than _
2A. All strong acids have _ than _
2B. All strong bases have _ than _
3. Group all the substances registered as a strong acid, with a ph of 1-2.
4. Group all the substances that registered as a strong base, with a ph of 13-14.
5. Group all the substances that registered as a weak acid, with a ph of 5-6.4
6. Group all the substances that registered as a weak base with a ph of 7.5-9
Answers
1. (A). All weak acids have a pH value that is higher than that of strong acids. Compared to strong acids, which dissociate completely and produce a higher concentration of H+ ions, resulting in a lower pH, weak acids partially dissociate in water, producing hydrogen ions (H+). produce a low concentration of K, leading to a high pH value.
B. All weak bases have a lower pH than strong bases. Compared to strong bases, which dissociate completely and form a higher concentration of OH- ions, weak bases receive fewer hydrogen ions from water, resulting in a lower concentration of hydroxide ions (OH-), As a result of which the pH value is reduced.
2. A. All strong acids are more acidic than weak acids in terms of pH. Compared to weak acids that only partially dissociate in water, strong acids dissociate completely, resulting in a larger concentration of H+ ions and a lower pH value.
B. All strong bases have pH values that are higher than those of weak bases. Compared to weak bases that only partially take up hydrogen ions, strong bases dissociate completely in water, producing a greater concentration of OH-ions and a higher pH value.
3. Hydrochloric acid (HCl), sulfuric acid (H2SO4), and nitric acid (HNO3) are some examples of substances that are listed as strong acids with a pH of 1-2.
4. Among others, sodium hydroxide (NaOH), potassium hydroxide (KOH), and calcium hydroxide (Ca(OH)2) are examples of substances classified as strong bases with a pH of 13–14.
5. Acetic acid (CH3COOH), formic acid (HCOOH), and carbonic acid (H2CO3), among others, can be classified as weak acids with a pH range of 5–6.4.
6. Ammonia (NH3), ammonium hydroxide (NH4OH), and methylamine (CH3NH2), among other substances, can be classified as weak bases with a pH range of 7.5 to 9.
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in what phase does crossing over occur
prophase 1 of meiosis
Answers
Crossing over occurs during prophase 1 of meiosis, the first stage of the two-part meiotic process in sexually reproducing organisms.
During prophase 1, homologous chromosome chromatids, which are identical copies of each other, come close to each other. Crossing over occurs when a small segment of one chromatid swaps places with a corresponding segment of the other. This process shuffles genetic information between homologous chromosomes, resulting in genetic variation and offspring diversity. Crossing over is an important step in the formation of gametes because it contributes to the generation of new gene combinations. The genetic variation that results is an important factor in evolution, allowing for adaptation to changing environmental conditions.
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Who was the first to recognize that the observations and experimental results
regarding matter could be explained by the existence of atoms?
a. Grookes
b. Rutherford
c. Ballen
d. Chadwick
Answers
It is important to allow each spot added to the chromatography paper to dry completely before adding another spot. Why is this so important?.
Answers
It is important to allow each spot added to the chromatography paper to dry completely before adding another spot in order to allow even separation of the solutes.
What is chromatography:Chromatography is the biological technique used to separate the constituent solutes of a solution using a stationary medium and a moving phase.
There are different types of chromatographic procedure including;
Paper chromatographyColumn chromatographyThin layer chromatographyIn paper chromatography, paper is used as the stationary medium. It is however, important to allow each spot added to the chromatography paper to dry completely before adding another spot in order to allow even separation of the solutes.
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What is the common size for beakers and flasks?
Answers
Answer:
the average size for a flask is 8 ounces.
Explanation:
i found this info on beaker:
Beaker Capacity Diameter Height
50 ml beaker 4 cm 5.5 cm
100 ml beaker 5 cm 7.2 cm
150 ml beaker 6 cm 8.5 cm
250 ml beaker 7 cm 9 cm
Calculate the wavelength (in nm) of light with a frequency of 5.98 x 1014 s 1. What is the energy of a photon of light that has a frequency of 9.89 x 1013 Hz?
Answers
The wavelength of the light is approximately 500 nm. The energy of the photon of light is approximately 6.56 x 10-20 J.
Answer: Question 1:The formula relating wavelength, frequency, and the speed of light is given by:c = fλHere,λ = wavelength, f = frequency, c = speed of lightI. n the problem, frequency is given as 5.98 x 1014 s-1. Therefore, using the formula, the wavelength of light can be calculated as follows:λ = c/f= (3 x 108 m/s)/(5.98 x 1014 s-1)≈ 500 nm
Therefore, the wavelength of the light is approximately 500 nm.
Question 2:The formula relating energy and frequency of light is given by:E = hfwhereE = energy of photonh = Planck's constant = 6.626 x 10-34 J s (Joule seconds)f = frequency of lightIn the problem, the frequency of light is given as 9.89 x 1013 Hz. Therefore, using the formula, the energy of the photon of light can be calculated as follows:E = hf= (6.626 x 10-34 J s) x (9.89 x 1013 Hz)≈ 6.56 x 10-20 J
Therefore, the energy of the photon of light is approximately 6.56 x 10-20 J.
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What started universe (Science)
Answers
Answer:
Big bang theory
Explanation:
Our universe began with an explosion of space itself - the Big Bang. Starting from extremely high density and temperature, space expanded, the universe cooled, and the simplest elements formed. Gravity gradually drew matter together to form the first stars and the first galaxies.
Answer:
The Big Bang
Explanation:
The Big Bang was the moment 13.8 billion years ago when the universe began as a tiny, dense, fireball that exploded. Most astronomers use the Big Bang theory to explain how the universe began.
The taste sensation umami is most likely to attract us to foods that are:.
Answers
The taste sensation umami is most likely to attract us to foods that are savory or rich in proteins, such as meats, cheeses, and mushrooms.
Umami is a Japanese word that translates to "pleasant savory taste" in English. It is one of the five basic tastes that humans can detect, alongside sweet, sour, bitter, and salty. Umami is typically associated with foods that are rich in proteins, particularly those that contain the amino acid glutamate.
In addition to meats and cheeses, other examples of foods that are high in umami include soy sauce, fish sauce, mushrooms, and tomatoes. The taste of umami can enhance the flavors of other ingredients in a dish and can create a more complex and satisfying taste experience for the eater. Because of this, umami is often used as a seasoning in cooking and can be found in many different types of cuisine.
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Question 11
Which formula represents a hydrocarbon?
C₂H6
C₂H5OH
C₂H5Cl
C₂H6O
Answers
Answer:
C₂H6
Explanation:
Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). Option A
A hydrocarbon is a compound that consists of only carbon and hydrogen atoms. It is important to identify the formula that represents a hydrocarbon among the given options:
A) C₂H6: This formula represents ethane, which is a hydrocarbon. Ethane consists of two carbon atoms bonded together with single bonds and six hydrogen atoms.
B) C₂H5OH: This formula represents ethanol, which is not a hydrocarbon. Ethanol contains a hydroxyl group (-OH), indicating the presence of oxygen in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.
C) C₂H5Cl: This formula represents ethyl chloride, which is not a hydrocarbon. Ethyl chloride contains a chlorine atom (Cl) in addition to carbon and hydrogen atoms. It is a haloalkane, not a hydrocarbon.
D) C₂H6O: This formula represents ethanol, which, as mentioned before, is not a hydrocarbon. Ethanol contains an oxygen atom (O) in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.
Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). It consists only of carbon and hydrogen atoms, making it a suitable representation of a hydrocarbon.
In summary, the formula C₂H6 (option A) represents a hydrocarbon, while the other options contain additional elements (oxygen or chlorine) that make them non-hydrocarbon compounds. Option A
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What is a major problem with Friedel-Crafts alkylation? A) It requires high temperatures. B) The conditions are too acidic. C) The starting material is frequently over-alkylated. D) The products coordinate with the aluminum chloride.
Answers
The major problem with Friedel-Crafts alkylation is that the starting material is frequently over-alkylated. Therefore, the correct answer is C.
Friedel-Crafts alkylation is a type of electrophilic aromatic substitution reaction that involves the formation of a carbon-carbon bond between an aromatic compound and an alkyl group. One of the major problems with this reaction is that the starting material is frequently over-alkylated, which can lead to the formation of multiple alkyl groups on the aromatic ring. This can result in a mixture of products, which can make it difficult to isolate the desired product.
Additionally, over-alkylation can lead to the formation of poly alkylated products, which are typically less reactive and more difficult to further functionalize.
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