Answers
Answer: below
Explanation: One possible synthetic pathway for preparing 3-bromoethylbenzene from benzene involves the following steps:
Nitration: Benzene is nitrated using nitric acid and sulfuric acid as the nitrating agent to form nitrobenzene.
Reduction: Nitrobenzene is reduced using zinc and hydrochloric acid to form aniline.
Acylation: Aniline is acylated using acetyl chloride to form N-phenylacetamide.
Bromination: N-phenylacetamide is brominated using bromine and hydrobromic acid to form 3-bromoacetanilide.
Deacylation: 3-bromoacetanilide is deacylated using sodium hydroxide to form 3-bromoaniline.
Alkylation: 3-bromoaniline is alkylated using ethylene oxide and potassium carbonate to form 3-bromoethylamine.
N-alkylation: 3-bromoethylamine is N-alkylated using acetic anhydride to form 3-bromo-N-ethylacetamide.
Hydrolysis: 3-bromo-N-ethylacetamide is hydrolyzed using sodium hydroxide to form 3-bromoethylbenzene.
Note that this is just one possible synthetic pathway and there are multiple variations and alternative routes that can be used to prepare 3-bromoethylbenzene from benzene.
Related Questions
discuss the reason for the presence of large number of organic compounds
Answers
Answer:
Carbon forms the large numbers of compound due to the following reasons
Why was Bohr's atomic model replaced by the
modern atomic model?
New knowledge showed that the electron was a
negatively charged particle.
New knowledge showed that atoms contained smaller
pieces called electrons.
O New knowledge showed that the exact location of
electrons cannot be known.
O New knowledge showed that electrons were located
around the center of the atom.
Answers
answer: c- new knowledge showed that the exact location of electrons can not be known.
Explanation: i just did it ;)
The reactant concentration in a zero-order reaction was 8.00×10−2 M
after 140 s and 4.00×10−2 M after 400 s
. What is the rate constant for this reaction?
Answers
The rate constant for the reaction is either 7.14×10−3 s−1 or 2.50×10−3 s−1, depending on which rate was used to calculate it.
Determining the rate constantThe rate of the reaction is given by the equation:
Rate = -k[A]
where k is the rate constant and [A] is the concentration of the reactant.
Rate at t=140 s:
Rate = (8.00×10−2 M - 0 M) / (140 s - 0 s)
= 5.71×10−4 M/s
Rate at t=400 s:
Rate = (4.00×10−2 M - 0 M) / (400 s - 0 s)
= 1.00×10−4 M/s
Since this is a zero-order reaction, the rate of the reaction is constant, and we can use either rate to calculate the rate constant:
k = Rate / [A]
Using the rate at t=140 s:
k = 5.71×10−4 M/s / 8.00×10−2 M = 7.14×10−3 s−1
Using the rate at t=400 s:
k = 1.00×10−4 M/s / 4.00×10−2 M
= 2.50×10−3 s−1
The rate constant for the reaction is either 7.14×10−3 s−1 or 2.50×10−3 s−1.
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Using the initial concentration and volume values from Trial 1 of Table 1, fill in the following chart of new concentration values (in Molarity) for the following reactants: [BrO3-], [I-], [H+].
Answers
Based on the given concentration and volume of solutions, the molarity of the ions are as follows:
Molarity of [BrO3-] = 0.02 MMolarity of [I-] = = 0.0033 MMolarity of [H+] = 0.05 MWhat is molarity of a solution?The molarity of a solution is the number of moles of the substance in a given volume of solution in litres.
Molarity = moles/volume in LMoles of [BrO3-] = 0.04M × 0.005 L = 0.0002 moles
Moles of [I-] = 0.01 M × 0.005 L = 0.00005 moles
Moles of [H+] = 0.1 M × 0.005 L = 0.0005 moles
Flask A:
total volume = 15 mL = 0.015 L
Molarity of [I-] = 0.00005/0.015
Molarity of [I-] = = 0.0033 M
Flask B:
Total volume = 10 mL = 0.01 L
Molarity of [BrO3-] = 0.0002/0.01
Molarity of [BrO3-] = 0.02 M
Molarity of [H+] = 0.0005/0.01
Molarity of [H+] = 0.05 M
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How many grams of AuCl3 contain 5.0 x 1023 molecules?
Answers
Answer:
approximately 251.55 grams of AuCl3 would contain 5.0 x 10^23 molecules.
Which compound is the conjugate base in the following reaction :H2SO4 + H2O —> HSO4 + H30+
Answers
*☆*――*☆*――*☆*――*☆*――*☆*――*☆*――*☆*――*☆**☆*――*☆*――*☆*――*☆
Answer: HSO4-
Explanation:
I hope this helped!
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which of the following has 54 electrons? group of answer choices 118sn4 128te2- 112cd 132xe 132xe2
Answers
128Te-2 has 54 electrons because it is a negative ion of tellurium, which has an atomic number of 52. The two extra electrons are what give it the negative charge.
Number of electrons present in the given compound = atomic number + negative charge on the atom - positive charge on the atom
(a) Given that For Te-2
The Atomic number of Te = 52
The Charge on Te-2 present is = -2
So, Number of electrons = 52+2 = 54 .
(b) Given that for 132Xe+
The atomic number of Xe = 54
The Charge on Xe+ present is = +1
So, Number of electrons = 54 - 1 = 53
(c) Given that for 118Sn+4
The atomic number of Sn+4 = 50
The Charge on Sn+4 present is = +4
So, Number of electrons = 50 - 4 = 46
(d) Given that for 132Xe+2
The atomic number of Xe = 54
The Charge on Xe+2 present is = +2
So, Number of electrons = 54 - 2 = 52
(e) Given that for 112Cd
The atomic number of Cd = 48
The Charge on Cd present is = 0
So, Number of electrons = 48
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complete question: Which of the following has 54 electrons? Group of answer choices
128Te2-
132Xe+
118Sn4+
132Xe2+
112Cd
How many grams are in 1.25 moles of NaCl
Answers
Answer:
73.05g
Explanation:
1.25 mol NaCl * \(\frac{58.44g}{1 mol NaCl}\) = 73.05g
58.44g = molar mass of NaCl
The image below shows a model of the atom. Which subatomic particle does the arrow in
the image below identify?
?
A. electron
B. neutron
C. orbital
D. proton
Answers
The correct answer is A. Electron
Explanation:
The model of this atom depicts the nucleus of this in the center of the model, this section of the atom contains sub-particles known as protons and neutrons. Moreover, in the atom, the nucleus is surrounded by three sub-particles that orbit or move around the nucleus. These sub-particles are the electrons; these differ from other sub-particles because they have a negative charge and they are not part of the nucleus. Also, these move around the nucleus is orbits, although they move similarly to waves. According to this, the correct answer is A.
In a newspaper, the prosecutor said, “Trace evidence is what was really important in this case. Without it, the suspect would not have been found guilty.” Based on this statement, what MOST likely happened in this case?
A.
The murder weapon was found at the suspect’s home.
B.
Multiple witnesses claimed to have seen the suspect commit the crime.
C.
A piece of the suspect’s hair was found on the victim’s body.
D.
There was video footage of the suspect leaving the victim’s home.
Answers
Trace evidence are things like DNA, fingerprints, or dried blood.
How many snickers will it take to equal 2 guffaws:
3 snickers = 2 giggles
6 giggles = 1 laugh
8 laughs = 3 guffaw
Answers
48 snickers will equal to two guffaws, substitute and simplify
please give brainliest
The answer is 48 snickers.
What is the unitary method?The unitary method is a technique for solving a problem by first finding the value of a single unit, and then finding the necessary value by multiplying the single unit value.
8 laughs = 3 guffaw
1 guffaw = 8÷3 laughs
2 guffaw = (8÷3)×2 laughs
6 giggles = 1 laugh
(8÷3)×2 laughs = (8÷3)×2×6 giggles
3 snickers = 2 giggles
1 giggles = 3÷2 snickers
(8÷3)×2×6 giggles = (8÷3)×2×6×(3÷2) snickers
=48 snickers
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A compound is found to contain 9.227 % boron and 90.77 % chlorine by mass. What is the empirical formula for this compound?
Answers
Assuming a 100 g sample of the compound, we can convert the mass percentages to masses in grams:
- 9.227 g B
- 90.77 g Cl
Next, we need to convert these masses to moles using the atomic masses of the elements:
- B: 10.81 g/mol
- Cl: 35.45 g/mol
- 9.227 g B ÷ 10.81 g/mol = 0.853 mol B
- 90.77 g Cl ÷ 35.45 g/mol = 2.562 mol Cl
Now we need to divide both mole values by the smaller of the two, which is 0.853 mol:
- 0.853 mol B ÷ 0.853 mol = 1.000 mol B
- 2.562 mol Cl ÷ 0.853 mol = 3.000 mol Cl
This gives us a B:Cl ratio of 1:3. The empirical formula for the compound is therefore BCl3.
Answer:
Empirical formula of a compound means that it provides simplest ratio of whole number.
Explanation:
Mass of boron and chlorine is 9.224% and 90.74%
A gas occupies a volume of 50.0 mL at 27°C. At what temperature, in °C, would the pressure be
101.3 kPa if the volume remains constant?
Answers
Answer:
i believe 223
Explanation:
T2 + 500k = 223 C*
Why atoms in our body don’t
eject electrons?
Answers
Answer:
When there are too many protons, some of the outer protons are loosely bound and more free to react with the electron. But most atoms do not have too many protons, so there is nothing for the electron to interact with. As a result, each electron in a stable atom remains in its spread-out wavefunction shape.
In an atom, there is a nucleus made up of neutral charged, neutrons, and positively charged protons. The reason why electrons which are negatively charged, don't fly off is due to its stronger attraction to the protons. ... This, however, still allows the electrons to move around the nucleus of an atom.
Alka was making tea in a kettle. Suddenly she felt intense heat from the puff of steam gushing out of the spout of the kettle. She wondered whether the temperature of the steam was higher than that of the water boiling in the kettle. Comment. (2)
Answers
It is likely that the temperature of the steam is higher than the temperature of the water boiling in the kettle. The intense heat felt by Alka from the puff of steam supports this observation.
In general, the temperature of steam produced from boiling water is higher than the temperature of the water itself. When water boils, it undergoes a phase change from a liquid to a gas, forming steam.
During this phase change, the water absorbs heat energy from the heat source, such as a stove or electric kettle, and converts it into the latent heat of vaporization.
The boiling point of water is 100 degrees Celsius (212 degrees Fahrenheit) at standard atmospheric pressure. At this temperature, the water molecules have enough energy to overcome the intermolecular forces and transition into the gaseous state.
However, steam is hotter than the boiling point of water because it contains additional heat energy in the form of latent heat. The heat energy absorbed during vaporization is stored as latent heat within the steam. As the steam gushes out of the spout of the kettle, it releases this latent heat energy, which can be felt as intense heat.
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A thermally insulated system consists of 1.00 mol of a diatomic gas at 148 K and 2.00 mol of a solid at 178 K that are separated by a rigid insulating wall. Find the equilibrium temperature of the system after the insulating wall is removed, assuming that the gas obeys the ideal-gas law and that the solid obeys the Dulong-Petit law. HINT: the gas does no work during the expansion, so Qgas = AEint = nc', AT. K Submit
Answers
169.2K is the equilibrium temperature of the system after the insulating wall is removed.
What is equilibrium?Generally speaking, a condition of equilibrium is one in which nothing is changing. A body in equilibrium won't undergo any energy exchanges, either positive or negative. Equilibrium is defined significantly differently in biology, physics, and chemistry.
Yet the underlying idea is the same. A body in balance will be least affected by outside influences. Even when external pressures are present, the opposing forces often have a balanced impact on the item under consideration.
for gas, n1=1mol
T1= 148K
for solid,n2=2mol
T2=178K
for conservation of energy, ΔQ= Qgas+ Qsolid=0
Q= CvΔT
0=Cvgas(Teql-148) + Cvsolid(Teq-178)
0= 5/2×1×R(Teql-148) + 3×2×R(Teq-178)
Tequi= 169.2K
Therefore, 169.2K is the equilibrium temperature of the system after the insulating wall is removed.
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What do the sections between the lines on a phase diagram represent? A. The areas in which the kinetic energy of a substance is constant B. The regions in which temperature and pressure change a substance's phase C. The conditions in which a substance exists in a certain phase D. The ranges where temperature and pressure are constant in a substance SUBMIT
Answers
The sections between the lines on a phase diagram represent Option B. The regions in which temperature and pressure change a substance's phase .
A phase diagram is a graphical representation that shows the conditions at which a substance exists as a solid, liquid, or gas.
It is a graph that represents the relationship between pressure and temperature under which a substance exists as a solid, liquid, or gas.
The sections between the lines on a phase diagram represent the regions in which temperature and pressure change a substance's phase.
Answer: B. The regions in which temperature and pressure change a substance's phase.
Explanation:A phase diagram is a graphical representation of the state of matter that exists under certain conditions of pressure and temperature.
A phase diagram is also known as a phase equilibrium diagram, a phase transition diagram, or a P-T diagram (pressure-temperature).
A phase diagram has three regions, solid, liquid, and gas, which are separated by phase boundaries.
Each boundary represents the conditions of temperature and pressure under which a phase change occurs.
The triple point is the point where all three phases coexist.
The critical point is the point at which the gas and liquid phases become indistinguishable.
The sections between the lines on a phase diagram represent the regions in which temperature and pressure change a substance's phase.
These sections are also called phase boundaries or phase transitions.
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A neutral atom of Sodium (Na) has an atomic number of 11 and an atomic mass of 23. Therefore, Na has _________________________ protons.
Answers
Answer:
11
Explanation:
Atomic number is the number of PROTONS an element has .
Ibuprofen can be found in 800 mg doses in over-the-counter analgesics, such as Advil and Motrin. How many grams of iburofen
does such a tablet contain?
800 mg =
g
Answers
The grams of iburofen does such a tablet contain 800 mg = 0.8g Ibuprofen
1 g = 10^-3g = .001g
Ibuprofen has 800 mg doses in over-the-counter analgesic
800g = 800 × .001
= 0.8g
Ibuprofen is Nondteriodal Anti-inflammatory Drug (NSAID)Ibuprofen's Mechanism of Action is Decreases inflammation, pain, and fever through inhibition of cyclooxygenase activity and prostaglandin synthesisnonsteroidal anti-inflammatory medication (NSAID) used for pain relief and to reduce fever by stops inflammation and by blocking formation of cyclo-oxygenase (COX-2) a chemical mediator of inflammatory chemicals. i.e prostaglandinsIt comes under the Class analgesic (reduce pain) and antipyretic (FIRE - reduce fever)e side effects of ibuprofen NSAID are peripheral edema, fluid retention with edema, tinnitus, purpura, petechiae, anorexia, diarrhea, rash, nausea, vomiting, fatigue, dizziness, lightheadedness, anxiety, confusionTo know more about analgesic visit :
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HQ5.40
Homework Answered Due Today, 11:59 PM
The reaction 3H₂(g) + N₂(g) → 2NH3(g) has an enthalpy of reaction of -92.6 kJ/mol. If 1 g of hydrogen and 2 g of nitrogen are
reacted, how much heat is produced (kJ)?
Answers
The amount of heat energy produced when 1 g of hydrogen and 2 g of nitrogen are reacted, is -6.61 KJ
How do i determine the heat energy produced?First, we shall obtain the limiting reactant. Details below:
3H₂ + N₂ -> 2NH₃
Molar mass of N₂ = 28 g/molMass of N₂ from the balanced equation = 1 × 28 = 28 g Molar mass of H₂ = 2 g/molMass of H₂ from the balanced equation = 3 × 2 = 6 gFrom the balanced equation above,
28 g of N₂ reacted with 6 g of H₂
Therefore,
2 g of N₂ will react with = (2 × 6) / 28 = 0.43 g of H₂
We can see that only 0.43 g of H₂ is needed in the reaction.
Thus, the limiting reactant is N₂
Finally, we the amount of heat energy produced. Details below:
3H₂ + N₂ -> 2NH₃ ΔH = -92.6 KJ
Molar mass of N₂ = 28 g/molMass of N₂ from the balanced equation = 1 × 28 = 28 gFrom the balanced equation above,
When 28 grams of N₂ reacted, -92.6 KJ of heat energy were produced.
Therefore,
When 2 grams of N₂ will react to produce = (2 × -92.6) / 28 = -6.61 KJ
Thus the heat energy produced from the reaction is -6.61 KJ
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Matter includes all of the following except
Answers
Not everything is matter. Here's a list of what we call NON-MATTER.
___________________________________________________________
Non matter...
LightHeatSound___________________________________________________________
Hope it helps!
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Which elements are diatomic?
1
H
3
Li
6
с
7
N
8
0
9
F
5
B
13
AI
2
He
10
Ne
18
Ar
15
P
16
S
17
CI
11
Na
19
K
4.
Be
12
Mg
20
Ca
38
Sr
31
Ga
33
As
35
Br
36
Kr
34
Se
52
Te
14
Si
32
Ge
50
Sn
82
Pb
114
FI
51
Sb
53
1
37
Rb
55
Cs
54
Xe
E
86
49
In
81
TI
113
Nh
56
Ba
83
Ві
84
Po
85
At
Rn
87
Fr
88
Ra
115
Mc
116
Lv
118
117
Ts
Og
Answers
Diatomic elements have to atoms of the element in a molecule.
What are diatomic elements?Diatomic elements are those elements whose atoms combine together to form molecules of the element. The elements that are diatomic in the list are;
HNOFClBrSeTeHence, diatomic elements have to atoms of the element in a molecule.
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A gas at 110 °C exerts a pressure
of 225 torr in a sealed container.
The temperature drops to 65 °C.
What is the pressure of the gas at
the cooler temperature?
Answers
The pressure of the gas at the cooler temperature, given that the gas at 110 °C exerts a pressure of 225 torr, is 198.6 torr
How do i determine the pressure at the cooler temperature?The following data were obtained from the question:
Initial temperature (T₁) = 110 °C = 110 + 273 = 383 KInitial pressure (P₁) = 225 torrNew temperature (T₂) = 65 °C = 65 + 273 = 338 KNew pressure (P₂) = ?The new pressure of the gas can be obtained as shown below:
P₁ / T₁ = P₂/ T₂
225 / 383 = P₂ / 338
Cross multipl
383 × P₂ = 225 × 338
383 × P₂ = 76050
Divide both sides by 383
P₂ = 76050 / 383
P₂ = 198.6 torr
Thus, we can conclude the pressure at the cooler temperature is 198.6 torr
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Calculate the pH of the solutions, given the following [H+], and then identify the solution as acidic, basic, or neutral.
[H+] = 1.2 x 10^-2 M
[H+] = 5.8 x 10^-9 M
[H+] = 3.92 x 10^-12 M
[H+] = 4.52 x 10^-5 M
Answers
pH = 1.92, acidic
pH = 8.24, basic
pH = 11.41, basic
pH = 4.34, acidic
To calculate the pH of a solution, we use the formula:
pH = -log[H+]
where [H+] is the concentration of hydrogen ions in moles per liter.
For [H+] = 1.2 x 10^-2 M:
pH = -log(1.2 x 10^-2) = 1.92
This solution is acidic.
For [H+] = 5.8 x 10^-9 M:
pH = -log(5.8 x 10^-9) = 8.24
This solution is basic.
For [H+] = 3.92 x 10^-12 M:
pH = -log(3.92 x 10^-12) = 11.41
This solution is basic.
For [H+] = 4.52 x 10^-5 M:
pH = -log(4.52 x 10^-5) = 4.34
This solution is acidic.
So, the pH and nature of the solutions are:
pH = 1.92, acidic
pH = 8.24, basic
pH = 11.41, basic
pH = 4.34, acidic
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Which types of particles are involved in a fission reaction?
A neutral neutron strikes a large neutral nucleus.
A positive proton strikes a large positive nucleus.
A neutral neutron strikes a large positive nucleus.
A positive proton strikes a large neutral nucleus.
Answers
How do ampullae help sharks find prey in murky water
Answers
Pick the correct answer!
1. Why does the octet rule apply primarily to main-group elements, not to transition metals?
a. The octet rule states that main-group elements tend to react so that they attain a halogen electron configuration.
b. The octet rule states that transition metal-group elements tend to react so that they attain a noble gas electron configuration.
c. The octet rule states that main-group elements tend to react so that they attain a ionic electron configuration. d. The octet rule states that main-group elements tend to react so that they attain a noble gas electron configuration.
Answers
Answer:
I think it would be b. The octet rule states that transition metal group elements tend to react so that they attain a noble gas electron configuration.
(objectives & conclusion) why it is necessary to know the different apparatus in the laboratory and how to do it
Answers
It is important to know the different apparatus in the laboratory and how to do it because these apparatus are handled carefully, and the experiment is done very carefully to avoid any mistakes.
What is a laboratory?A laboratory is a place where all scientific apparatus and instruments are put and experiments are done. These places are kept safe and hygienic and all experiment is done precisely to get results.
Thus, knowing the various lab equipment and how to utilize it is crucial because errors might happen during experiments because of how carefully this equipment must be handled.
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PLEASE HELPPPPPP 100 POINTS!!!!!!!
Answers
This isn't a Chemistry question. You might have better luck getting an answer if you posted under Geography.
Platinum -186 would have how many protons and how many neutrons
Answers
Platinum (Pt) has six naturally occurring isotopes (190Pt, 192Pt, 194Pt, 195Pt, 196Pt and 198Pt). Platinum -186 would have 78 number of protons and 117 number of neutron.
What is Platinum ?Platinum is a chemical element represented by the symbol Pt and the atomic number is 78. It is malleable, ductile, highly unreactive, precious, silverish-white transition metal. Platinum (Pt) has six naturally occurring isotopes (190Pt, 192Pt, 194Pt, 195Pt, 196Pt and 198Pt).
Platinum is classified as a transition metal. Platinum atoms have 78 electrons and 78 protons with 117 neutrons in the most abundant isotope of platinum.
Thus, Platinum -186 would have 78 number of protons and 117 number of neutron.
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