Do electron pair geometry of Carbonothioyl dibromide please

Answer:

The dissociation of a monoprotic acid HA can be represented as follows:

HA ⇌ H+ + A-

The equilibrium constant expression for this reaction is:

Ka = [H+][A-]/[HA]

We are given the initial concentration of the acid (HA) as 0.48 M and the equilibrium concentration as 0.36 M. At equilibrium, the concentration of H+ and A- will also be 0.36 M.

Substituting the values into the equilibrium constant expression, we get:

Ka = (0.36)^2 / 0.48 = 0.27

Therefore, the value of Ka for the acid is 0.27, rounded to two significant figures.

Answer:

the answer is for surely C

Explanation:

you can tell from the way is made and I also have one in my room

The number of atoms of each element found in the formula 3He₂O₄PH are: 6 Helium atoms, 4 Oxygen atoms, 1 Phosphorus atom, and 1 Hydrogen atom.

The formula 3He₂O₄PH represents a molecule containing the elements Helium (He), Oxygen (O), Phosphorus (P) and Hydrogen (H).

The subscripts in the formula indicate the number of atoms of each element present in one molecule of the compound.

Therefore, the number of atoms of each element in 3He₂O₄PH is:

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Explanation:

From the balanced equation you can see that for every TWO moles of S , THREE moles of O2 are needed

 so if you have four moles of S you will need SIX moles of O2 ....meaning

you will have  ( 9.5 - 6 ) = 3.5 moles of O2 left over

The net ionic equation for the given reaction is: 1 Cr3+(aq) + 3OH-(aq) → Cr(OH)3(s)

2. The formula for the precipitate formed in this reaction is Cr(OH)3.

3. The sum of all coefficients in the net ionic equation is 4.

Consider the reaction between aqueous solutions of potassium hydroxide and chromium (III) chloride. The balanced chemical equation for the given reaction is:KOH(aq) + CrCl3(aq) → KCl(aq) + Cr(OH)3(s)1) Spectator ionsThe ions that do not take part in the reaction are known as spectator ions.

These ions are present on both sides of the equation without undergoing any chemical changes.The ionic equation for the given reaction is:3K+(aq) + 3OH-(aq) + Cr3+(aq) + 3Cl-(aq) → 3K+(aq) + 3Cl-(aq) + Cr(OH)3(s)The spectator ions are K+ and Cl-.2)

PrecipitateThe precipitate is formed when the two reactants are combined together, and it can be identified from the ionic equation. In this reaction, the precipitate is formed when KOH is added to the aqueous solution of chromium(III) chloride.The formula for the precipitate formed in this reaction is Cr(OH)3.3) Sum of all coefficientsThe net ionic equation represents the actual chemical change occurring in the reaction.

The spectator ions are removed, and only the ions that participate in the reaction are shown. The net ionic equation for the given reaction is:Cr3+(aq) + 3OH-(aq) → Cr(OH)3(s)The sum of all coefficients in the net ionic equation is 4.

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To determine the Cl for NeMutl:Wt, you need to use the data from part 2 of the case study. The data is given as 1x10-10 for the Wt strain and 1x10-7 for the mutant strain. To calculate the Cl, we use the following equation: Cl = 1/[(1/ID50) - (1/LD50)]. Using this equation, we can calculate the Cl to be 3x10-3.

To determine the Cl for NeMut2:Wt, we can use the same equation. Using the data from the table in part B, the Cl for NeMut2:Wt can be calculated to be 8x10-3.Interpreting these results, we can see that NeMut1:Wt has a Cl that is roughly 3 times lower than that of NeMut2:Wt. This suggests that the mutation of NeMut1 is significantly affecting a virulence factor, while NeMut2 may not be affecting a virulence factor as significantly.

It is important to note that similar LD50 and/or ID50 values of a Wt and mutant strain does not necessarily mean that the mutation does not affect a virulence factor. This is because the LD50 and ID50 values are used to measure how much of the pathogen is needed to produce a certain effect, but other aspects of the pathogen such as the speed or rate of infection or the amount of toxin produced can still be different and affect the virulence of the strain.

Cl for NeMut1:Wt cannot be calculated from the data presented in part 2 of the case study. The given results are:|  Inoculum (LD50) |  Mortality (LD50) |  CFU/ml of blood | Wild-type   | 6.5 × 10−7    |  6.5 × 10−7      | 7.0 × 103 | NeMut1  | 1.0 × 10−10    |  6.5 × 10−7     | 3.0 × 105 | NeMut2  | 2.0 × 10−7    |  2.0 × 10−7     | 2.2 × 103 |Since the Cl cannot be calculated from the data given, the correct option is (d) Cl cannot be calculated from the data given.If the LDs0 and/or IDs0 values of a Wt and mutant strain are similar in this type of experiment, it does not necessarily mean that the mutation does not affect a virulence factor.

This is because mutations can affect different aspects of virulence, and the specific virulence factor being measured may not be impacted by the mutation.In order to determine the CI for NeMut1:Wt and NeMut2:Wt, we need to use the following formula:CI = (output ratio of mutant) / (output ratio of wild-type)Output ratio = (CFU/ml of blood) / (inoculum)Using the data from the table, we get:

Output ratio of NeMut1:Wt = 3.0 × 105 / 1.0 × 10−10 = 3.0 × 1015Output ratio of wild-type = 7.0 × 103 / 6.5 × 10−7 = 1.1 × 1010CI of NeMut1:Wt = (3.0 × 1015) / (1.1 × 1010) = 2.7 × 105Output ratio of NeMut2:Wt = 2.2 × 103 / 2.0 × 10−7 = 1.1 × 1010CI of NeMut2:Wt = (1.1 × 1010) / (1.1 × 1010) = 1Interpretation of results from question 5 above: The CI of NeMut1:Wt is much greater than 1, indicating that NeMut1 is more virulent than the wild-type strain. The CI of NeMut2:Wt is equal to 1, indicating that NeMut2 does not exhibit any significant difference in virulence compared to the wild-type strain.

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The empirical formula of a molecule containing 65.5% carbon, 5.5% hydrogen, and 29% oxygen is CH2O.

To calculate this, you need to first convert the percentage composition into mass composition. This is done by multiplying the percentages by the molecular weight of each element.

Carbon: 65.5% x 12 g/mol = 0.786 g/mol
Hydrogen: 5.5% x 1 g/mol = 0.055 g/mol
Oxygen: 29% x 16 g/mol = 0.464 g/mol
Now that you have the mass composition, you can calculate the moles of each element by dividing the mass of each element by its molar mass.
Carbon: 0.786 g/mol / 12 g/mol = 0.065 mol
Hydrogen: 0.055 g/mol / 1 g/mol = 0.055 mol
Oxygen: 0.464 g/mol / 16 g/mol = 0.029 mol
Finally, divide each element's moles by the smallest moles to get the empirical formula.

Carbon: 0.065 mol / 0.029 mol = 2.24 = 2 mol
Hydrogen: 0.055 mol / 0.029 mol = 1.90 = 1 mol
Oxygen: 0.029 mol / 0.029 mol = 1.00 = 1 mol
Therefore, the empirical formula of the molecule is CH2O.

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No, the inverse of the matrix represented as M=[-1 -4] does not exist.

An inverse matrix is a square matrix that, when multiplied by its original matrix, yields the identity matrix. It allows for solving linear equations involving the original matrix.

To determine if a matrix has an inverse, we can compute its determinant. If the determinant is nonzero, then the matrix has an inverse; if the determinant is zero, then the matrix does not have an inverse.

The given matrix M is a 1x2 matrix, so it's not square and it doesn't have an inverse.

Therefore, we can't find the inverse of matrix M.

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Burning your mouth on a hot spoon(option D) is an example of heat transfer through conduction, as the spoon is in direct contact with your mouth.

Conduction is the transfer of heat or electrical energy between two objects that are in direct contact with each other, or between two parts of the same object that are at different temperatures.

In conduction, the energy transfer occurs due to the collision of molecules in the objects or materials. When two objects are in contact, the molecules of the warmer object vibrate more rapidly, colliding with the molecules of the cooler object, which have less energy.

These collisions transfer thermal energy from the warmer object to the cooler object, until both objects reach the same temperature.

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Answer:

Explanation:

The lattice energy (LE) of MgCl₂ can be calculated using the Born-Haber cycle, which relates the lattice energy to other thermodynamic quantities such as enthalpy of sublimation, ionization energy, electron affinity, and heat of formation.

The equation for the lattice energy of MgCl₂ is:

LE(MgCl₂) = H(sublimation of Mg) + IE(Mg) + EA(Cl) + 1/2 H₂(Cl₂) - DH(f)(MgCl₂)

where H(sublimation of Mg) is the enthalpy of sublimation of Mg, IE(Mg) is the ionization energy of Mg, EA(Cl) is the electron affinity of Cl, H₂(Cl₂) is the heat of formation of Cl₂, and DH(f)(MgCl₂) is the heat of formation of MgCl₂.

We are given the following equations:

Mg(g) → Mg2+(g) + 2 e ΔH₁ = +2188 kJ/mol

Cl(g) + e → Cl-(g) ΔH₂ = -337 kJ/mol

Mg(s) + Cl₂(g) → MgCl₂(s) ΔH₃ = -642 kJ/mol

Using these equations, we can calculate the values of H(sublimation of Mg), IE(Mg), EA(Cl), H₂(Cl₂), and DH(f)(MgCl₂) as follows:

H(sublimation of Mg) = ΔH₂(Mg(g)) + 1/2 ΔH₃(Cl₂(g)) - ΔH₁(Mg2+(g)) = -2220 kJ/mol

IE(Mg) = ΔH₁(Mg(g)) = +2188 kJ/mol

EA(Cl) = ΔH₂(Cl(g)) = -337 kJ/mol

H₂(Cl₂) = 0 (since Cl₂ is in the gas phase)

DH(f)(MgCl₂) = ΔH₃(Mg(s), Cl₂(g), MgCl₂(s)) = -642 kJ/mol

Substituting these values into the equation for the lattice energy, we get:

LE(MgCl₂) = -2220 + 2188 - 337 + 1/2(0) - (-642) = -3509 kJ/mol

Therefore, the lattice energy of MgCl₂ is approximately -3509 kJ/mol.

Answer: two solid electrodes (must be two different metals in solution)

a balanced equation for the redox reaction: 2 Ca(s) + O2(g) → 2 CaO(s)

A redox reaction is a type of chemical reaction that involves the transfer of electrons between species. One species undergoes oxidation (loses electrons) while another species undergoes reduction (gains electrons).

In the reaction between calcium metal and oxygen gas, the calcium metal is being oxidized (loses electrons) and the oxygen gas is being reduced (gains electrons). This can be seen in the balanced equation where the calcium atoms go from having an oxidation state of 0 to +2, while the oxygen atoms go from having an oxidation state of 0 to -2.

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Answer: 468.8m

Explanation:

640kHz x 1000Hz/1kHz = 6.4x10^5 Hz

λ=c/v

3.00x10^8m/s / 6.4x10^5s = 468.75m

Answer- Incomplete combustions of alkanes are dangerous as it leads to  toxic gases such as carbon monoxide man odorless,colorless and highly poisonous gas to be released in the air

Environmental impacts of burning fossil fuels such as alkanes can have a massive impact of global warming in which heat is prevented from the leaving the atmosphere due to a build-up of carbon dioxide ad other compounds, collectively known as greenhouse gases. In order to make these impacts less severe scientists have found alternative fuels, such as biofuels and biodiesels, this can reduce the risk of harm to the world as alternative fuels produce less CO2 and air pollutants then others that run on petrol and diesel

The reaction starts with 0.200 M A and 0.250 M B, the equilibrium concentration of C.3.63x10⁻¹⁰ M.

Chemical equilibrium is the state in which both the reactants and the products of a reaction are at a concentration that does not change over time any longer. In this condition, the forward and backward reaction rates are equal.

2A(aq) + B(aq) <==> C(aq)

Equilibrium expression is

K = [C] / [A]2[B]

Prepare an ICE table:

2A(aq)  +  B(aq) <==>  C(aq)

0.2..........0.15...............0........Initial

-2x...........-x.................+x......Change

0.2-2x....0.15-x............x........Equilibrium

Substitute in the equilibrium expression:

1.10x10⁻⁴ = (x) / (0.2-2x)2(0.15-x)  ... b/c K is small, we can essentially avoid using the quadratic as follows..

1.1x10⁻⁴  = x/(0.2)2(0.15)

x = (2.2x10₋⁵) (1.65x10⁻⁵)

x = 3.63x10⁻¹⁰  M = [C]

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The two equilibria are the triple point, which is the point when water can exist as ice, liquid, or vapor, and the critical point, which is when water exists as a single phase that has properties of both a liquid and a gas.

The line connecting the triple point and critical point on the phase diagram of water represents the conditions at which the solid, liquid, and gas phases can coexist in equilibrium.

At the triple point, which occurs at a temperature of 0.01℃ and a pressure of 0.006 atm, the solid, liquid, and gas phases of water exist in equilibrium. This means that at this point, water can exist as ice, liquid, or vapor, depending on the conditions.

At the critical point, which occurs at a temperature of 374℃ and a pressure of 218 atm, the distinction between the liquid and gas phases disappears, and the substance becomes a supercritical fluid. This means that at this point, water exists as a single phase, which exhibits the properties of both a liquid and a gas.

There are two ways to turn nitrogen gas into a liquid:

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The molecular ion produced when an organic molecule is bombarded by a high-energy stream of electrons is known as a radical cation.

Radical cations are highly reactive and can react quickly with other compounds in their environment. The number of electrons removed to form the radical cation is determined by the type of organic molecule that is bombarded. If an alkene is bombarded, two electrons are typically removed, forming an allyl radical cation, while the addition of three electrons is necessary to form a benzyl radical cation. Radical cations are stabilized by the formation of new bonds with other molecules, thereby forming an adduct. The adduct can then be separated and characterized using chromatographic techniques. Additionally, radical cations can also react with nucleophiles, resulting in a variety of other reaction products. Thus, the molecular ion produced when an organic molecule is bombarded by a high-energy stream of electrons is a radical cation.

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Answer:

1.  placing balls

2. list of materials

Explanation:

To write the net ionic equation for this reaction, we need to first write the balanced molecular equation, and then break down all the soluble ionic compounds into their constituent ions:

Molecular equation:

SnBr2(aq) + K2S(aq) → SnS(s) + 2KBr(aq)

Complete ionic equation:

Sn2+(aq) + 2Br-(aq) + 2K+(aq) + S2-(aq) → SnS(s) + 2K+(aq) + 2Br-(aq)

Net ionic equation:

Sn2+(aq) + S2-(aq) → SnS(s)

The net ionic equation shows only the species that are involved in the actual reaction, which in this case are the tin cation (Sn2+) and the sulfide anion (S2-), which combine to form solid tin sulfide (SnS). The potassium cation (K+) and bromide anion (Br-) ions are spectator ions that do not participate in the reaction and are omitted from the net ionic equation.

Ionic refers to a type of chemical bond that occurs when one or more electrons are transferred from one atom to another, resulting in the formation of ions.

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The 4p-orbital can hold a maximum of 6 electrons, the 3d-orbital can hold a maximum of 10 electrons, the 1s-orbital can hold a maximum of 2 electrons, and the 4f-orbital can hold a maximum of 14 electrons.

The set of quantum numbers {n, I, ml, m} is incorrect because I is not a quantum number; instead, it should be l, which stands for the angular momentum quantum number. This set of quantum numbers must satisfy the following conditions: n ≥ l ≥ m_l ≥ |m_s|. For an electron in an atom, any combination of quantum numbers where n < l is forbidden, because n must be greater than or equal to l. Additionally, any combination of quantum numbers where |m_l| > l is forbidden because m_l must be less than or equal to l.
Real orbitals have the following combinations of n and l: n = 1 and l = 0 (1s), n = 2 and l = 0, 1 (2s, 2p), n = 3 and l = 0, 1, 2 (3s, 3p, 3d), n = 4 and l = 0, 1, 2, 3 (4s, 4p, 4d, 4f).
The principal quantum number and the orbital angular momentum quantum number for the 4p-orbital is n = 4 and l = 1; for the 3d-orbital is n = 3 and l = 2; for the 1s-orbital is n = 1 and l = 0; for the 4f-orbital is n = 4 and l = 3.
The 4p-orbital can hold a maximum of 6 electrons, the 3d-orbital can hold a maximum of 10 electrons, the 1s-orbital can hold a maximum of 2 electrons, and the 4f-orbital can hold a maximum of 14 electrons.

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A) All these statements are false. Option E is correct.
B) 0.22 M NaCN must be added to a 0.5 M HCN solution to produce a buffer solution with a pH of 7.0. The Ka for HCN is 6.2 x 10–10. So the correct option is E.

A) a. The pH at the equivalence point is greater for HC2H3O2 than for HCl - FALSE. The pH at the equivalence point is the same for both weak and strong acids when titrated with a strong base such as NaOH.
b. HCl is a strong acid and requires more moles NaOH to reach the equivalence point - FALSE. Both HCl and HC2H3O2 require the same amount of moles of NaOH to reach the equivalence point.
c. The pH at the half equivalence point is the same for both solutions - FALSE. The pH of the half equivalence point is different for HCl and HC2H3O2. For HCl, the pH of the half equivalence point is 7, whereas for HC2H3O2, the pH of the half equivalence point is greater than 7.
d) The initial pH is the same for both solutions - FALSE. The initial pH of the two solutions are different due to the different properties of the two acids.
e) All these statements are false - TRUE. All of the statements above are false. Option E is correct.
B) To answer the second part of the question, 0.22 M NaCN must be added to a 0.5 M HCN solution to produce a buffer solution with a pH of 7.0. The Ka for HCN is 6.2 x 10–10. In order to calculate the amount of NaCN required, use the Henderson-Hasselbalch equation:
pH = pKa + log [NaCN]/[HCN]
Rearranging and solving for [NaCN]:
[NaCN] = 10^(7-6.2) x 0.5 = 0.22 M

So the correct option is E.

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A) To solve this problem, we can use the formula for the ionization constant of water:

Kw = [H3O+][OH-]

At 50 oC, Kw = 5.476 x 10-14. We can assume that [H3O+] and [OH-] are equal since we are dealing with pure water.

Therefore,

[H3O+] = [OH-] = sqrt(Kw) = sqrt(5.476 x 10-14) = 7.40 x 10-8 mol/L

pH = -log[H3O+] = -log(7.40 x 10-8) = 7.13

pOH = -log[OH-] = -log(7.40 x 10-8) = 7.13

To find the values for pure water at 60oC, we can use the new value of Kw at that temperature:

Kw = 9.550 x 10-14

[H3O+] = [OH-] = sqrt(Kw) = sqrt(9.550 x 10-14) = 3.09 x 10-7 mol/L

pH = -log[H3O+] = -log(3.09 x 10-7) = 6.51

pOH = -log[OH-] = -log(3.09 x 10-7) = 6.51

b) i) No, it does not mean that pure water becomes more acidic as the temperature rises.

ii) The correct answer is 2. As the temperature increases, the ionization of water increases and more H3O+ and OH- ions are formed. However, since the concentration of H2O is also decreasing due to the increase in temperature, the increase in ionization does not result in an increase in [H3O+] and pH actually decreases.

The addition of 0.20 M NaOH to 0.20 M CH3CH2COOH can result in the formation of a buffer solution because NaOH is a strong base, and CH3CH2COOH is a weak acid. When these two react, they will produce a salt and water, and the salt will act as the buffer that helps keep the pH of the solution relatively constant.

The addition of 0.20 M NaOH to 0.20 M CH3CH2COOH results in the formation of a buffer solution because NaOH is a strong base, and CH3CH2COOH is a weak acid. When a strong base is mixed with a weak acid, a buffer solution is formed. A buffer solution is able to resist changes in pH when small amounts of an acid or base is added.

When NaOH is added to CH3CH2COOH, the weak acid (CH3CH2COOH) will react with the strong base (NaOH) to produce salt (CH3CH2COONa) and water (H2O). The CH3CH2COONa salt will then dissociate into CH3CH2COO- and Na+ ions, which will act as the buffer. The CH3CH2COO- ions will then accept H+ ions from an acid and donate H+ ions to a base. This helps to keep the pH of the solution relatively constant.

The Ka of the CH3CH2COOH is 1.8x10^-5 and its pKa is 4.75. This means that the buffer will work best when the pH is close to 4.75. The amount of NaOH added to the CH3CH2COOH will determine the pH of the buffer solution. If the amount of NaOH is too high, the pH will be above the pKa and the buffer will not work as efficiently.

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This will have no effect on the molarity of the NaOH solution, as the amount of NaOH will remain the same.

The calculated molarity of NaOH solution would be affected (too high, too low, or no change) in the following ways

:If the burette is not rinsed with the solution before it is filled, the calculated molarity of NaOH solution will be too low. This is because impurities present in the burette could dilute the solution, resulting in an incorrect molarity measurement.If you go past the endpoint in the titration, the calculated molarity of NaOH solution will be too high. This is because the added base has exceeded the amount required to neutralize the acid.

As a result, the molarity of the NaOH solution will appear higher than it is in reality. If some of the acid solution splashes out of the flask during the titration, the calculated molarity of NaOH solution will be too high. This is because the acid solution lost its concentration, resulting in the molarity being higher than it should be.

Using water to rinse the inner sides of the flask will not affect the calculated molarity of NaOH solution. This is because water is neutral and does not have the ability to react with the solution, which means that the molarity of the NaOH solution will remain unchanged.

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Because the marked atom has a single electron pair, one sp bonded link, and one created by overlapping p orbitals, it is sp bridged. Nitrogen has therefore undergone sp fusion.

The hybridized of the atom labelled no.1 is sp3. Since there are two lone pairings of electrons, two bonds, and four groups surrounding this atom, their hybridization is sp3. Just under 109.5 degrees make up the bond angle.

The nitrogen has 4 sp3 hybrid orbitals since it is sp3 hybridised. To create the two N-H sigma bonds, two of the sp3 hybridised orbitals overlap with hydrogen s orbitals.

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The interaction between Arrhenius acid and base, which produces salt and water as a byproduct, is referred to as a neutralisation reaction. Strong acids include substances like HCl, HNO3, H2SO4, etc.

The term "Arrhenius acid" refers to a material that contains a hydrogen atom that readily releases a hydrogen ion and proton when it is in contact with water. For instance, when hydrochloric acid dissolves in water, it produces the ions hydronium (H3O+) and chloride (Cl-).

The hydrogen ion (H+) is one of the electrically charged molecules or atoms that are produced when an acid dissociates in water, according to the Arrhenius theory, which was first proposed by Swedish scientist Svante Berzelius in 1887. On the other hand, bases ionise in water to produce hydroxide ions (OH).

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The molecule that is drawn in a conformation that has a proton and a leaving group anti-periplanar is H₂C, Br.

The A, B, C, and D bond angles of a molecule are referred to as anti-periplanar, or antiperiplanar, in organic chemistry. The dihedral angles of the A–B and C–D bonds in this conformer are larger than +150° or less than 150°. In textbooks, the term "anti-periplanar" is frequently used to refer to a strictly anti-coplanar structure with a 180° AB CD dihedral angle. The anti-periplanar functional groups will be 180° apart from one another and in a staggered configuration in a Newman projection of the molecule.  

Conformation is an essential factor in predicting reactivity in organic molecules. The anti-periplanar conformation of a molecule is one that occurs when two atoms in a molecule are in the same plane and are separated by 180 degrees. In this case, the proton and leaving group are placed in a perpendicular plane to the atoms directly in between them. This is the most stable conformer of the molecule. A significant factor in predicting reactivity in organic molecules is conformation. In this case, the molecule H₂C, Br is drawn in a conformation that has a proton and a leaving group anti-periplanar.

Therefore, the correct option is H₂C, Br.

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