Which of the following reacts at the fastest rate when heated with N-bromosuccinimide (NBS) and benzoyl peroxide in carbon tetrachloride at 80 degree C? A. toluene B. Ethylbenzene C. isopropylbenzene (cumene) D. tert-butylbenzene

Options b) and d) are correct . In these two cases equilibrium constant is greater than 1.

What hard and soft acids?

Hard acid means which are Small, highly charged (the charge criterion mostly applies to acids, to a lesser extent to bases), and poorly polarizable. Soft applies to species which are big ,have low charge states and are strongly polarizable.

a)  In case of first reaction BF3 is harder acid than BBr3 , so K<1

b) HOC(CH3)3 is harder acid ,so K>1

c) reaction will shift towards reactants side ,so K<1

d) Reaction will shift towards right ,so K>1

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The Magnesium atom with very little electron density attracts the Oxygen side of the water which has a partial negative charge.

What is oxygen?

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The concentration of chloride ion in the sample of seawater in ppm is 1940 ppm.

The concentration of a substance in ppm means concentration in parts per million.

Concentration in parts per million, ppm, is equivalent to a concentration of mg/L.

The concentration of chloride ion in the sample of seawater = 1.94 %

A percentage w/v concentration of 1.94 % = 1.94 g/L of solution.

To convert this concentration in grams per liter to mg per liter, we do the following:

1 g = 1000 mg

Hence, 1.94 g = 1940 mg

Hence, the concentration in parts per million = 1940 mg/L or ppm.

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The formal charge of (CH3)3NO by considering its resonance Oxygen, -1; Nitrogen, +1.

How to calculation formal charge?

The hypothetical charge that an atom in a molecule would have if the electrons in the bonds were distributed uniformly among the atoms is known as the formal charge. Another way to state this is that formal charge is created by subtracting the nonbonding electrons from the amount of valence electrons on a neutral atom, followed by the number of bonds that connect that atom to other atoms in the Lewis structure.

As a result, we determine formal charge as follows:

Formal charge:= # electrons in the free valence shell of the atom,- # lone pair electrons, -1/2 # bonding electrons.

By calculating the formal charges for the entire structure, we can double-check our results. The total formal charge of every atom in a molecule must be zero, and the total formal charge of an ion must be equal to the ion's charge.

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The pressure of the gas is now obtained as 32.7 atm.

We know that the reaction has been shown in the question and we have been asked to be able to obtain the final pressure of the system. We need to obtain the limiting reactant so that we can be able to get the amount of the product that is formed.

If 1 mole of phosphorus reacts with 6 moles of chlorine

0.351 moles of  phosphorus reacts with 0.351 moles * 6 moles/1 mole

= 2.1 moles

Thus chlorine is the limiting reactant.

6 moles of chlorine produces 4 moles of phosphorus trichloride

1.17 moles of chlorine produces 1.17 moles * 4 moles/6 moles

= 0.78 moles

We would now apply the ideal gas equation;

PV = nRT

P = pressure

V = volume

n = Number of moles

R = gas constant

T = temperature

Then

P = nRT/V

P = 0.78 * 0.082 * 572/1.12

P = 32.7 atm

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He must do to these two numbers to find number of iron atoms in the  sample by multiplying them.

Avogadro's number can be multiplied or divided to convert between molecules and moles: Adding 6.02 x 10²³ o the number of moles will convert it to molecules. Divide the number of molecules by 6.02 x 10²³ to get the equivalent number of moles.

One of the basic constants in chemistry is the Avogadro's number. When the same number of atoms or molecules are being compared, it allows comparison of the various atoms or molecules of the given substances.

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4.78 × 10^-19 J.

To find the energy of the emitted photon, we can use the formula E = hc÷λ. where E is the energy, h is the Planck constant, c is the speed of light, and λ is the wavelength of the radiation. Plugging in the given values ​​gives:

E = (6.626 × 10^-34 Js)(2.998 × 10^8 m/s)/(5.40 × 10^2 nm)

= 4.78 × 10^-19 J

So the energy of the photon being emitted is 4.78 × 10^-19 J.

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Option D is correct. DNA contains the bases adenine (A), cytosine (C), guanine (G), and thymine (T) (T). These bases come in particular pairs (A with T, and G with C).

Deoxyribose sugar, a phospate molecule, and one nitrogenous base from adenine, guanine, thymine, and cytosine are all components of the nucleotides that make up DNA strands. Uracil never makes up a DNA nucleotide. A sugar (deoxyribose or ribose), a phosphate, and a nitrogen base make up a nucleotide (uracil, adenine, thymine, guanine, or cytosine). In eukaryotes, histones are utilized to structure DNA; they are not a part of nucleotides. The main form of linkage found in nucleic acids, such as DNA and RNA, is phosphodiesterase linkage. With no phosphodiester connections tying the phosphate to the nearby 3'OH sugar molecule.

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The molar mass of phenyl alanine is 165 g/mol and the mas of the phenyl alanine is 211.2 g /mol

We know that the statement in the question has told that from the reaction equation. It is one mole of the aspartame that is required to be able to obtain one mole of the phenylamine.

Now we know that the number of moles of the aspartame that is required can be obtained by the use of;

Number of moles =  mass/molar mass

=  378g/294.3 g/mol

= 1.28 moles

Molar mass of phenylalanine = 9(12) + 11(1) + 14 + 2(16)

=108 + 11 + 14 + 32

= 165 g/mol

Hence mass of the phenylamine = 1.28 moles * 165 g/mol

= 211.2g

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There are sixteen lone pairs in the molecule and two bond pairs in the molecule. The compound has a tetrahedral  electron geometry but the shape is bent. The compound is polar.

The compound that is under consideration is selenium dichloride. In this compound, we have one atom of selenium and then two atoms of chlorine. The accurate and correct Lewis structure of the compound have been shown in the image that is attached to this answer.

In that structure, we can see the number of valence electrons that can be found in the compound and some of the electrons are lone pairs while the other valence electrons can be seen to be bond pairs.

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The balance the equation below in acidic medium are :

6Fe²⁺  +  2Cr₂O₇²⁻   +  14H⁺  ---->  6Fe³⁺  +  2Cr³⁺   +   7H₂O

1) The equation is given as :

Fe²⁺  +  Cr₂O₇²⁻   ----->   Fe³⁺  +  Cr³⁺

oxidation half : Fe²⁺  --->     Fe³⁺

reduction half : Cr₂O₇²⁻  --->  Cr³⁺

2) first balance the oxidation half :

Fe²⁺  --->     Fe³⁺ +  e⁻

this equation is balanced.

3) balanced reduction half :

Cr₂O₇²⁻  --->  2Cr³⁺

add seven H₂O molecule on the right side to balance the O atoms.

Cr₂O₇²⁻  --->  2Cr³⁺   +  7 H₂O

to balance 14 H atom add 14 H⁺ on the left side :

Cr₂O₇²⁻  +  14H⁺  --->  2Cr³⁺   +  7 H₂O

now, balance the charge :

Cr₂O₇²⁻  +  14H⁺  + 6e⁻ --->  2Cr³⁺   +  7 H₂O

6 electrons are gained by the reduction half , so multiply 6 in oxidation equation

6Fe²⁺  --->     6Fe³⁺ +  6e⁻

add both the equation we get :

6Fe²⁺  +  2Cr₂O₇²⁻   +  14H⁺ 6e⁻  ---->  6Fe³⁺  +  2Cr³⁺   +   7H₂O + 6e⁻

The final balanced equation is given as :

6Fe²⁺  +  2Cr₂O₇²⁻   +  14H⁺  ---->  6Fe³⁺  +  2Cr³⁺   +   7H₂O

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[tex]K_{p} =\frac{K_{c} }{[RT]^{2} }[/tex]

The equilibrium constants for a perfect gaseous mixture are[tex]K_{p} \:and\:K_{c}[/tex]When equilibrium concentrations are stated in atmospheric pressure, the equilibrium constant is [tex]K_{p}[/tex], and when they are expressed in molarity, the equilibrium constant is [tex]K_{c}[/tex]

[tex]N_{2}(g)\rightarrow+3H_{2} (g)\Longleftrightarrow2NH_{3}(g)[/tex]

we need to find the relation between [tex]K_{p} \:and\:K_{c}[/tex] for this balanced equation:

[tex]K_{p} =\frac{[P_{NH_{3} }]^2}{[P_{N_{2} }][P_{H_{2} }]^3}\:\rightarrow(1)[/tex]

where[tex]P_{x}[/tex]  means partial pressure of gas [tex]x[/tex].

By ideal gas equation

[tex]PV=NRT\\P=\frac{N}{V} RT[/tex]

And  [tex]\frac{N}{V}=\frac{moles}{volume} \\[/tex] denotes concentration

[tex]P=[C]RT \rightarrow[/tex] where C means the (1)

[tex]K_{p} =\frac{[NH_{3}] ^{2}.[RT]^{2} }{[N_{2} ] ^{2}.[RT]^{}\times[H_{2} ]^{3} [RT ]^{3} }[/tex]

[tex]K_{p} =\frac{[NH_{3}] ^{2}. }{[N_{2} ] ^{}.[^{}\[H_{2} ]^{3} } \:[/tex][tex]\times\frac{1}{RT} \rightarrow(2)[/tex]

we know for the reaction equilibrium constant in terms of concentration-

[tex]K_{p} =\frac{[NH_{3}] ^{2}. }{[N_{2} ] ^{}.[^{}\[H_{2} ]^{3} } \:[/tex]

Replacing this in equation no (2),

[tex]K_{p} =\frac{K_{c} }{[RT]^{2} }[/tex]

[tex]K_{p} ={K_{c} }{[RT]^{\triangle n} }\\\triangle n=(moles\:of \:gaseous\: products)-(moles \:of \:gaseous\:reactant)[/tex]

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The mass of the oxygen gas produced If this reaction produced 94.7 g KCl is equal to 61 g.

A balanced chemical equation represents the number of atoms of every type of element that is same on the either side of the reaction. The law of conservation of mass is obeyed by every balanced chemical equation.

The total mass on the reactant side is equal to the total mass on the product side in a balanced chemical equation according to this law.

Given a balanced chemical equation of the decomposition of KClO₃:

[tex]2KClO_3 \longrightarrow 2KCl +3O_2[/tex]

The mass of KCl produced = 94.7 g

The number of moles of KCl = 94.7/74.5 = 1.27 mol

Therefore, 1.27 moles of KClO₃ will be decomposed.

2 moles of KClO₃ produces oxygen gas = 3 mol

Then 1.27 mol of KClO₃ will produce oxygen = (3/2) ×1.27 = 1.91 mol

The mass of oxygen gas produced = 1.91 ×32 =  61 g

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Due to the gas within cooling off due to the low temperature, the balloon's volume shrinks.Because helium is lighter than the same volume of air at room temperature, the helium balloon rises.

Boyle's Law: The Relationship Between Pressure and VolumeThe volume of a gas reduces as pressure increases because the gas particles are pushed closer together. The ability of a gas to spread its particles farther apart causes its volume to increase as pressure decreases, in contrast.

The air within the balloon contracts because liquid nitrogen, which is -196 degrees Celsius, cools so quickly.

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To calculate the Molar Concentration, we will find the molar concentration by dividing the moles by liters of water used in the solution. The concentration of the initial CaCl2 solution of Ca2+ in CaCl2 solution is 42 mEq/L.

What is molar concentration?

Molarity is a measure of the concentration of a chemical species, especially a solute, in solution and is expressed as the amount of substance per unit volume of solution.

Therefore, To calculate the Molar Concentration, we will find the molar concentration by dividing the moles by liters of water used in the solution. The concentration of the initial CaCl2 solution of Ca2+ in CaCl2 solution is 42 mEq/L.

equation:-

[tex]1:1 stoichiometry,.36.8 mL of 1.69M EDTA solution[/tex]

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Cyclohexane (C6H12C6H12), a cyclic chemical utilized in the production of nylon and discovered during the distillation of petroleum, is shown in three dimensions.

Cyclic structure is defined as a substance where at least some of the atoms are linked together to form rings. The number of atoms in a ring can range from three to hundreds. The VSEPR shape of the caffeine molecule is trigonal planar. There is a 120 degree angle between each atom.

Both pyrimidinedione and imidazole rings are heterocyclic rings; pyrimidinedione rings have a 6-member structure and two nitrogen atoms, whilst imidazole rings have a 5-member structure.

Thus, cyclohexane (C6H12C6H12), a cyclic chemical utilized in the production of nylon and discovered during the distillation of petroleum, is shown in three dimensions.

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The correct order is: Revolution> Solar day> Rotation> Period of daylight or darkness.

Revolution:

According to the stars, the Earth orbits the sun in 365 days, 6 hours, and 9 minutes, rotating at a speed between 29.29 and 30.29 km/s. Every fourth year, which is known as a leap year, the 6 hours, 9 minutes add up to roughly one extra day. The extra day added is February 29th.

Solar Day:

A solar day lasts roughly 24 hours on Earth. The Earth's orbit is not a perfect circle because it is elliptical. This implies that certain solar days on Earth are somewhat longer than 24 hours and some are slightly shorter.

Rotation:

The Earth has an inclination of 23.45 degrees from the plane of its orbit around the sun, and revolves on its axis in relation to the sun every 24.0 hours mean solar time. The differences brought on by the non-circular orbit of the Earth are averaged out to create mean solar time.

Period of daylight:

At the equator, day and night are always twelve hours long, with the exception of two tiny effects that lengthen day by roughly eight minutes.

Hence the order is Revolution> Solar day> Rotation> Period of daylight or darkness.

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The transition metal coordination complexes [NiCl4]2- and [Co(H2O)]3+ have the highest and lowest d electron counts, respectively. [Fe(OH2)] 3+, [MnO4]-.

An electron is a subatomic particle with a negative charge that can be either free or bonded to an atom (not bound). An atom has three different sorts of constituents, two of which are particles and one of which is an electron that is bound to it.

The parts of an atom with negative charges are referred to as electrons. The charge of an atom's proton in the nucleus is balanced by the total negative charge of the atom's electrons.

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A radical is a reactive intermediate with a single unpaired electron, formed by homolysis of a covalent bond.

Most organic transformations involve the movement of electron pairs (heterolytic reactions). There are a few important addition reactions, however, in which the electron reconfiguration involves the movement of singleelectrons.

Whereas heterolytic bond cleavage leads to ion pairs,  homolytic bond cleavage results in unpaired electrons – or free radicals.

Some weak bonds have a tendency to fragment homolytically (e.g., peroxides, halogens). Chemists use a slight variation of curved arrow notation to show the movement of single electrons. For single electron  movement, “fishhook” arrows, i.e., single headed arrows are drawn.

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The pattern here is Non-symmetrical or bimodal.

How can you see patterns in data?

How do you define "identifying patterns in data"?

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Answer:

To determine the final temperature (in °C) of a vessel that is calibrated to initially read 1.00 atm at 0.00 °C if the pressure changes to 1.25 atm, we can use the ideal gas law equation:

PV = nRT

where P is the pressure, V is the volume, n is the number of moles of gas, R is the ideal gas constant, and T is the temperature.

Since the volume, number of moles of gas, and the ideal gas constant are all held constant in this problem, we can rearrange the equation to solve for T:

T = (PV)/(nR)

Substituting the given values into the equation, we get:

T = (1.25 atm * V)/(nR)

= (1.25 atm * V)/(1R)

Since the initial pressure and temperature of the vessel are 1.00 atm and 0.00 °C, respectively, we can use the ideal gas law equation to solve for the initial volume of the vessel:

V = (nRT)/P

= (1 * R * 0.00 °C)/(1.00 atm)

= 0

Since the volume of the vessel is 0, the final temperature of the vessel cannot be determined using the ideal gas law equation.

Therefore, it is not possible to determine the final temperature of the vessel in this situation.

To solve this problem, we can use the equilibrium constant expression for the water-gas shift reaction:

K = [CO][H2O] / [CO2][H2]

where [CO], [H2O], [CO2], and [H2] are the equilibrium concentrations of the respective species.

We are given the value of K and the initial concentrations of CO2 and H2. We can use these values to solve for the equilibrium concentration of CO.

First, we need to set up the equilibrium constant expression:

K = [CO][H2O] / [CO2][H2]

We are given that K = 0.106 and [CO2] = 0.632 M. We can substitute these values into the equation:

0.106 = [CO][H2O] / (0.632 M)(0.570 M)

We can then solve for [CO] by multiplying both sides of the equation by (0.632 M)(0.570 M) and rearranging:

[CO] = (0.106)(0.632 M)(0.570 M) / (0.632 M)(0.570 M)

[CO] = 0.106

Thus, the final concentration of CO is 0.106 M.

Answer:5

Explanation:

By dividing the specified mass by the molar mass of NaCl N a C l, which is: =58.44 g/mol, we may accomplish this.

Molecules per liter, or mol/L, are used to measure molarity. A 0.30 M NaCl solution has 0.30 mol of sodium chloride per liter of fluid. Making solutions is a common task for chemists, thus performing the calculations required to create a specific volume of solution is instinctive. Sodium chloride has a molar mass of 58.5 grams. 0.085 moles of sodium chloride make up one mole. The solution is thought to have a volume of 100mL, or 0.1L. Hence, the 5% saline molarity. Therefore, we must ascertain the NaCl N a C l's equivalent number of moles in order to obtain the molarity.

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All listed options are valid exceptions to the octet rule.

Some elements, such as boron (B) and beryllium (Be), may have incomplete octets.

Some elements, such as aluminum (Al) and chlorine (Cl), can have extended octets if they are in the third period or below in the periodic table.

Hydrogen (H) usually don't follow the octet rule because they usually only want to have two valence electrons.

Carbon (C) can have up to 12 valence electrons under certain circumstances. For instance, When forming aromatic compounds or forming covalent bonds with other elements with high electron demand.

Overall, the octet convention is a general guideline and not strictly followed by all elements. There are many exceptions to this rule, and some elements may deviate from the octet rule to achieve more stable electronic configurations.

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The mass of the hydrogen gas produced if 3.9 moles of tin react is equal to 7.9 g.

A balanced chemical equation in which the number of atoms of every type of element is same on the both sides of the reaction. The law of conservation of mass is followed by every balanced chemical equation.

The total mass of the elements on the reactant side is equal to the total mass of elements on the product side in a balanced chemical equation according to this law.

Given a balanced chemical equation of the reaction of the tin and HF:

[tex]Sn (s) + 2 HF (g) \longrightarrow SnF_2 (s) + H_2(g)[/tex]

One mole of tin produces hydrogen gas = 1 mol

Then 3.9 mol of tin produces hydrogen gas = 3.9 mol

The mass of 3.9 mol of hydrogen gas = 3.9 ×2 = 7.8 g

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Avoid contact with eyes, skin, and mucous membranes as both copper (II) chloride and barium chloride are extremely poisonous when consumed.

The potassium ion (K+) emits light in two different colours. By removing the main colour as the potassium burns, you can see the "underlying" hue by using the cobalt glass.

Avoid contact with eyes, skin, and mucous membranes as copper(II) chloride is mildly poisonous. Body tissue is sensitive to lithium chloride. Before throwing the wooden splints in the trash, rinse them to prevent trashcan fires. Put on chemical splash goggles, gloves, and an apron to protect your skin.

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Answer:

If it is elemental gas, the oxidation number is $$0$$.

Explanation:

The oxidation number of an atom in a chemical bond, is the charge left on the atom