How many signals would you see in the alkene/aromatic region of a 13C NMR spectrum of the following molecule?A) 3B) 4C) 5D) 6

The strength of dipole interactions is mostly determined by the difference in electronegativity between atoms in a molecule.

Dipole interactions occur between polar molecules, which have a separation of electric charge resulting from a difference in electronegativity between the atoms that make up the molecule. Electronegativity is a measure of how strongly an atom attracts electrons towards itself in a covalent bond.

The greater the difference in electronegativity between the atoms in a molecule, the larger the dipole moment and the stronger the dipole-dipole interactions. This is because the partial positive and negative charges in a polar molecule are more pronounced when the electronegativity difference is higher, which leads to stronger attractions between the molecules.

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The catabolic step in which greatest quantity of ATP is  produced is  oxidative phosphorylation.

Oxidative phosphorylation or electron transport-linked phosphorylation or terminal oxidation is the metabolic pathway in which cells use enzymes to oxidize nutrients, thereby releasing chemical energy in order to produce adenosine triphosphate (ATP).

In eukaryotes, this takes place inside mitochondria. Almost all aerobic organisms carry out oxidative phosphorylation. This pathway is so pervasive because it releases more energy than alternative fermentation processes such as anaerobic glycolysis.

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According to the statement, the standard enthalpy change for the reaction at 25°C is ∆H°rxn = -16.3kJ

The change in enthalpy if one mole of a substance is created from its natural components under the same conditions—1 atm of pressure and 298.15 K—is known as the standard enthalpy of formation.

Mg(OH)2(s) + 2HCl(g) ------> MgCl2(s) + 2H2O(g)

∆H°rxn =Σn∆H°f(products) -Σm∆H°f(reactants)

where,

n and m are coefficents of products and reactants respectively

H°rxn = (1mol mol H°f MgCl2 (s) in addition to 2mol mol H°f H2O (g)) - (2mol H°f(HCl(g)) + 1mol H°f(Mg(OH)2(s))

= (1mol × ( -641.8 kJ / mol) + 2 mol ×( -241.8 kJ / mol)) - ( 1mol × -924.5kJ / mol + 2 mol × (-92.30 kJ/ mol) )

= -1125.4kJ + 1109.1kJ

= -16.3 kJ

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This ability is best quantified by its electronegativity. Electronegativity is a measure of an atom's ability to attract a shared pair of electrons towards itself.

The higher the electronegativity, the more strongly an atom is able to attract the shared electrons, and the more polar the covalent bond is.  Electronegativity is a measure of the ability of an atom to attract electrons to itself when bonded with another atom. It is calculated on a scale from 0 to 4, with 0 being the least electronegative and 4 being the most electronegative. A higher electronegativity value indicates that the atom is more likely to attract electrons to itself, while a lower electronegativity value indicates that it is less likely to do so. Electronegativity therefore can be used to determine how electrons in a covalent bond are distributed between two atoms.

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One mole of table sugar (sucrose: C12H22O11) would contain about 6.022 x 10^23 molecules of sucrose.

In order to calculate the number of molecules present in one mole of table sugar i.e. sucrose ( C12H22O11 ), we need to calculate the molecular mass of sucrose firstly. To get the molecular mass of sucrose the atomic masses of all the contributing atoms is needed to be added :

Molecular mass of sugar will be = (12 x 12) + (22 x 1) + (11 x 16)

= 144 + 22 + 176

= 342 daltons

So, according to avogadro's law one mole of sucrose will have the mass of 342 grams. Now, to calculate the number of molecules present in one mole of sucrose, we have to use Avogadro's number. Which is the number of particles (atoms, molecules, or ions)  present in one mole of a substance. Avogadro's number is approximately 6.022 x 10^23 particles per mole.

Therefore, the number of molecules in one mole of sucrose can be calculated below :

Number of molecules in one mole of sucrose = 1 × (6.022 x 10^23) molecules.

So, the number of molecules in 1 mole of sucrose is calculated to be approximately 6.022 x 10^23 molecules.

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As seen in the equation below, hydrogen peroxide, or H2O2, breaks down to create water and oxygen: O2 = 2 H2 O2(l) + 2 H2 O2(l) (g) H

How does hydrogen fuel work?

Energy created from other sources can be transported, transported, and stored using hydrogen. Many processes can be used today to manufacture hydrogen fuel. Nowadays, electrolysis and natural gas reforming, a thermal process, are the two most used techniques. Solar-powered and biological processes are some additional techniques.

Is hydrogen an element in chemistry?

One element of chemistry is hydrogen. It has an atomic number of 1 and the letter H. It's the lightest element on the periodic table with a standard atomic masses of 1.008. 75% of all ordinary (baryonic) stuff is made up of hydrogen, making it the most prevalent chemical isotope in the universe (by mass ). Hydrogen makes up the majority of stars.

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Activated carbon, also known as activated charcoal, is a crude layout of graphite, the substance utilized for pencil leads. It varies from graphite by having a random, imperfect structure that is favorably porous over a wide range of pore sizes.

The graphite structure provides the carbon its very extensive surface area which entitles the carbon to adsorb a wide scope of compounds. Activated carbon has the strongest physical adsorption forces or the spaced-out volume of adsorbing porosity, of any material known to mankind. Activated carbon is utilized to refine liquids and gases in a combination of applications, incorporating municipal drinking water, food and beverage processing, odor removal, and industrial pollution control.

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F- blocks elements are called inner transition metals. It occupies a position between the elements lanthanum and hafnium and between actinium and rutherfordium.

In the Periodic table, the inner transition elements are sometimes called the f-block elements since in this region the f-orbitals are being filled in. The elements constituting the f-block or inner transition metals are those in which 4f and 5f orbitals are progressively filled. These elements are the members of group 3 but shown separately as f-block of the periodic table. The elements of f-block are called inner transition elements. There are 28 inner transition elements in the periodic table. The inner transition elements are two series of elements known as the lanthanoids and actinoids.

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Pentane has a straight mirror plane along the middle, much like ethane does. Pentane contains three different sorts of carbon atoms, which can be seen by rotating the molecule 180° at a time.

While carbon 3 is distinct, carbons 1 and 5, 2 and 4, and 3 and 4 are homotopic pairings. One signal will be produced for each of the two homotopic couples, and one for carbon 3 alone. As a result, despite pentane having five carbon atoms, there are a total of three 13C NMR signals.

Alkenes and alkynes also follow these alkane symmetry laws.

A mirror plane can be found in toluene. We can observe that two pairs of comparable carbon if we locate that mirrorplane and rotate around it.

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The molar mass of sulfuric acid (H₂SO₄) is approximately 98.08 g/mol.

Look up the atomic masses of each element in the formula:

Hydrogen (H): 1.01 g/mol

Sulfur (S): 32.06 g/mol

Oxygen (O): 16.00 g/mol

Count the number of atoms of each element in one molecule of sulfuric acid:

2 atoms of hydrogen (H)

1 atom of sulfur (S)

4 atoms of oxygen (O)

Multiply the atomic mass of each element by the number of atoms of that element, then add the results together:

(2 x 1.01 g/mol) + (1 x 32.06 g/mol) + (4 x 16.00 g/mol) = 98.08 g/mol

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--The complete question is, What is the molar mass of H₂SO₄?--

Therefore, the pressure of 1.45 moles of an ideal gas in a 3.23-liter container at 95°C is 6.84 atm.

The force exerted per unit area is measured as pressure. It is a physical quantity that describes the intensity of a force applied to a surface. It is defined as the amount of force applied to an item or material divided by the area across which the force is exerted. Pressure is measured in several units, including pascals (Pa), pounds per square inch (psi), atmospheres (atm), and torr. In ordinary life, the most common measure of pressure is probably psi or atm, although in scientific situations, the SI unit pascal is frequently employed. Pressure is a fundamental concept in many branches of science and engineering.

Here,

To solve this problem, we can use the ideal gas law, which relates the pressure (P), volume (V), number of moles (n), and temperature (T) of an ideal gas:

PV = nRT

where R is the gas constant.

We can rearrange the formula to solve for pressure:

P = nRT/V

We are given the number of moles of gas (n = 1.45 mol), the volume of the container (V = 3.23 L), and the temperature (T = 95°C + 273.15 = 368.15 K). The gas constant R is 0.08206 L⋅atm/(mol⋅K).

Substituting the values into the formula, we get:

P = (1.45 mol) * (0.08206 L⋅atm/(mol⋅K)) * (368.15 K) / (3.23 L)

P = 6.84 atm

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A convergent plate boundary is a type of plate boundary where two tectonic plates move towards each other and collide. When the leading edge of one plate dips beneath the other plate, it creates a subduction zone.

Volcanoes form at convergent plate boundaries because as the leading edge of the subducting plate sinks into the mantle, it melts and releases volcanic magma. This magma rises to the surface, where it can create a volcano. Volcanoes can form along the boundary where the two plates meet, or they can form on the overriding plate above the subduction zone. The type of volcano that forms depends on the types of rocks and minerals present in the magma and the characteristics of the subduction zone.

Volcanoes are formed by the subduction of plates. Subduction at convergent plate boundaries is the cause of many volcanoes around the world. Decompression causes melting along diverging plate boundaries. Long fissures and fissures in the earth allow lava to flow.

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As two plates move towards one another and collide, it forms a convergent plate boundary. A subduction zone is formed when the front edge of one plate descends beneath the other plate.

Convergent border describes the location where two plates collide. One plate may bend downward into a deep undersea trench or both plates may flex upward into mountain ranges as a result of the collision.

Examples. Because of the collision of the Indian and Eurasian plates, the Himalayas are being formed. As the northern Pacific Plate subducts beneath the NW North American Plate, the Aleutian Islands are the result. By subducting beneath a South American Plate, the Nazca Plate formed the Andes.

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Purines and pyrimidines are two types of nitrogenous bases that are essential components of nucleotides, which make up the building blocks of DNA and RNA.

Purine synthesis: It occurs mainly in the liver, and it involves the construction of the purine ring system. The precursor molecules for purine synthesis are amino acids, carbon dioxide, and formate. The purine synthesis pathway starts with the formation of inosine monophosphate (IMP) and proceeds to the formation of adenosine and guanosine.

Pyrimidine synthesis: It occurs in multiple tissues and involves the construction of the pyrimidine ring. The precursor molecules for pyrimidine synthesis are aspartate, glutamine, and carbon dioxide. The pyrimidine synthesis pathway starts with the formation of carbamoyl phosphate and proceeds to the formation of uridine and cytidine.

The key difference between purine and pyrimidine synthesis is that purine synthesis requires more precursor molecules and metabolic steps compared to pyrimidine synthesis. Additionally, purine synthesis is regulated by feedback inhibition by end-products, while pyrimidine synthesis is regulated by a feedback mechanism involving the availability of nucleotides for DNA replication.

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Answer:

a. 87.33 g

b. 2.30 g

Explanation:

1 mole of LiCl has 42.394 g

=> 2.060 x 42.394 = 87.33164 g or 87.33 g

1 mole of C2H2 has 26.04 g

=> 0.0885 x 26.04 = 2.30454 g or 2.30 g

0.378 moles of barium chloride are needed to produce 10.5 grams of aluminum chloride.

Barium chloride is an inorganic compound with the chemical formula BaCl2. It is a white, odorless powder that is highly soluble in water. It is commonly used in industrial applications, such as water treatment, papermaking, and asphalt production.

To answer this question, you first need to calculate the molar mass of barium chloride and aluminum chloride. The molar mass of barium chloride is 208.212 g/mol and the molar mass of aluminum chloride is 133.341 g/mol.
Next, you need to calculate the moles of aluminum chloride needed to produce 10.5 grams. To do this, divide the 10.5 grams of aluminum chloride by the molar mass of aluminum chloride (133.341 g/mol), which equals 0.0788 moles of aluminum chloride.
Now, you can calculate the moles of barium chloride needed to produce the 0.0788 moles of aluminum chloride. To do this, divide the 0.0788 moles of aluminum chloride by the molar mass ratio of barium chloride to aluminum chloride (208.212 g/mol / 133.341 g/mol), which equals 0.378 moles of barium chloride.
Therefore, 0.378 moles of barium chloride are needed to produce 10.5 grams of aluminum chloride.

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Create an Atom PhET. This self-guided exercise introduces students to the fundamental ideas behind atomic structure. Pupils learn about isotopes, ions, and the building blocks of atoms. Also, students study isotope names and symbols.

A chemical element is uniquely defined by its atoms, which are tiny pieces of substance. An atom is made up of a core nucleus and one or more negatively charged electrons that orbit it. The positively charged, comparatively hefty protons and neutrons that make up the nucleus may be present. PhET offers enjoyable, cost-free, interactive simulations of science and math based on research. To ensure that each simulation is educationally beneficial, we thoroughly test and assess it. Student interviews and observations of simulation use in class are part of these tests. Boulder University in Colorado The PhET Interactive Simulations project at the University of Colorado Boulder produces free interactive math and science simulations. It was founded in 2002 by Nobel Laureate Carl Wieman.

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The leading five nations in terms of carbon dioxide emissions (metric tonnes per person) are Afghanistan (0.30), Albania (1.96), Algeria (3.71), Andorra (6.40), and Angola (1.06).

For the first five nations in the data set, the carbon dioxide emissions (measured in metric tonnes per person) are as follows: Afghanistan is rated as 0.30, Albania is 1.90, Algeria is 3.70, Andorra is 5.80, and Angola is 1.20. According to the statistics, there are huge differences between the CO2 emissions that various nations produce per person, with some producing very little and others producing a lot. This diversity can be linked to a variety of things, such as disparities in economic growth, energy use, and governmental environmental protection measures. In order to combat the consequences of global warming and the problems posed by climate change, it is imperative to reduce CO2 emissions.

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Fatty acids are organic molecules that consist of a long hydrocarbon chain and a carboxyl group (-COOH) at one end. They can exist in different forms, but their most common structure is a linear, unbranched chain of carbon atoms with hydrogen atoms attached to most of the carbons.

The carboxyl group at the end of the chain is polar and hydrophilic (water-loving), while the hydrocarbon chain is nonpolar and hydrophobic (water-fearing). This makes fatty acids amphipathic, meaning they have both hydrophilic and hydrophobic properties.

Fatty acids are the building blocks of many lipids, including fats, oils, and phospholipids. They play important roles in energy storage, membrane structure, and cellular signaling.

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A financial measure called the Acid Test Ratio, The acid test ratio is calculated as follows: Current Liabilities / (Cash + Marketable Securities + Accounts Receivable).

A financial ratio used to assess a company's liquidity is the acid test ratio, sometimes referred to as the fast ratio. It is determined by multiplying a company's current liabilities by its current assets, minus its inventory. The acid test ratio can be calculated as follows: Acid Test Ratio = Current Assets - Inventories / Current Liabilities

The phrase "ecosystem" refers to a group of people who work in the construction industry. The current ratio, which counts inventories as a current asset, is seen to be a less conservative indicator of liquidity than the acid test ratio.

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The electron configuration for sulfur can be written as follows: 1s² 2s² 2p⁶ 3s² 3p⁴. Sulfur is an element with atomic number 16, which means it has 16 protons and 16 electrons.

To write the electron configuration for sulfur, we need to determine how these electrons are arranged in the atom. The electron configuration of an atom indicates how its electrons are distributed among its various energy levels. In general, electrons fill up the lowest energy levels first before moving to higher energy levels.

The electrons in an atom can be described using a notation that lists the energy level, sublevel, and number of electrons in each sublevel. The electron configuration for sulfur can be determined by following a set of rules known as the Aufbau principle, the Pauli exclusion principle, and Hund's rule. These rules dictate the order in which electrons fill up the available energy levels and sublevels, and ensure that no two electrons in an atom have the same set of quantum numbers.

To write the electron configuration for sulfur, we start by filling up the first energy level, which can hold up to 2 electrons. Next, we move on to the second energy level, which can hold up to 8 electrons. We then fill up the sublevels in the following order: 2s, 2p, 3s, 3p, 4s, and so on.

Using this method, the electron configuration for sulfur can be written as follows:

1s² 2s² 2p⁶ 3s² 3p⁴

This notation indicates that the first energy level has 2 electrons (denoted by 1s²), the second energy level has 8 electrons (2s² 2p⁶), and the third energy level has 6 electrons (3s² 3p⁴). The 3p sublevel is half-filled with 4 electrons, which makes sulfur a p-block element.

In summary, the electron configuration for sulfur can be written as 1s² 2s² 2p⁶ 3s² 3p⁴. This notation describes how the electrons are arranged in the atom, and is based on the rules of the Aufbau principle, the Pauli exclusion principle, and Hund's rule.

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Regioselective properly describes a chemical reaction in the favor of one possible structural isomer over one or more other structural isomers. Option B is correct.

Regioselectivity refers to a chemical reaction that favors the formation of one constitutional isomer over another. In other words, the reaction shows selectivity towards a specific site of the molecule, often due to the presence of certain functional groups or steric hindrance.

Stereoselectivity, on the other hand, refers to a chemical reaction that favors the formation of one stereoisomer over another, while stereogenic refers to a chiral center or a molecule that can form chiral centers.

Hence, B. Regioselective is the correct option.

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SiO2 is the chemical name for silicon dioxide. One silicon atom and two oxygen atoms make up the compound. One of the most prevalent minerals in the Earth's crust, it is also known as silica or quartz.

One silicon atom and two oxygen atoms combine to form silicon dioxide, often known as silica or quartz. It is one of the most common minerals in the crust of the Earth, accounting for around 59% of the crust's weight. Due to its distinct physical and chemical characteristics, including as its hardness, high melting point, and resistance to chemical reactions, it has a wide range of uses. It is employed in a number of sectors, including the manufacture of glass, ceramics, and electronics. It is a crucial part of many living species and may be found in many natural materials including sand, rocks, and soil. Nevertheless, continuous exposure to tiny silicon dioxide particles might result in respiratory issues such

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The change in temperature for the silicon is approximately -2.21°C. Note that the negative sign indicates a decrease in temperature.

Using the formula q = m * c * ΔT, we can rearrange it to solve for c, giving c = q / (m * ΔT). Plugging in the given values, we get c = -125 J / (25.0 g * -5.0 degrees Celsius) = 1.00 J/(g*C).

To calculate the change in temperature of silicon, we need to use the specific heat capacity of silicon (0.71 J/g°C) and the equation:

q = m × c × ΔT

where q is the energy released (-125 J), m is the mass of silicon (25.0 g), c is the specific heat capacity of silicon (0.71 J/g°C), and ΔT is the change in temperature we want to calculate.

Rearranging the equation, we get:

ΔT = q / (m × c)

Substituting the values, we get:

ΔT = -125 J / (25.0 g × 0.71 J/g°C) ≈ -2.21°C

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Answer:-29.4

Explanation:

The units for the rate constant K, for the zero - order reaction is mol L⁻¹s⁻¹. The correct option is a.

The rate of the chemical reaction is defined as when rate is the directly proportional to the product of the concentrations terms of  moles and  of the two of the reactants, and the square of the molar concentration of the such reactant if there is only the one, is called as the bi-molecular kinetics. The Second-order reaction rates are that which is the inversely proportional with the square of the reactant's concentration and the product of concentrations of the two reactants.

The rate law expression for the zero order reaction is Rate = k[A]°

The unit rate constant K = mol L⁻¹s⁻¹. Therefore option a is correct.

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Answer:

tropical continental

Explanation:

tropical continental are hot dry air masses. They form in summer mostly over Southwestern US and Northern Mexico.

The composition of a mixture of two components that generates the lowest possible melting point describes eutectic composition.

The precise combination of at least two solid components that, at a certain temperature, causes a change in phase to liquid is known as a eutectic composition. This temperature, also known as the eutectic point temperature, is the minimal melting point for all conceivable compositions.

When a solid solute, a solid solvent, and a liquid mixture all exist in the same phase, that point is known as the eutectic point. The lowest temperature at which the liquid phase is stable at a specific pressure is known as the eutectic point.

For soldering, eutectic alloys are frequently employed. By mass, a typical composition consists of 63% tin and 37% lead. Very strong and resistant to corrosion are eutectoid glassy metals.

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At normal temperature, aluminum interacts with weak hydrochloric acid. With hydrochloric acid, the metal dissolves, producing colorless hydrogen gas and aluminum chloride.

Although hydrogen is non-toxic, it can accumulate indoors in places like storage storage rooms and replace oxygen, leading to asphyxiation. By giving hydrogen fuel a manufactured smell and warning customers in the event of a leak, adding odorants can help mitigate this risk to some extent.

High-Temperature Water Splitting: Redox reactions that split water into hydrogen are fueled by high temps generated by light concentrators or nuclear reactors. Photobiological Water Splitting: When water is consumed by microbes like green algae in the presence of sunshine, hydrogen is produced as a byproduct.

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Water is an important molecule because it can form hydrogen bonds, which allow it to have unique properties such as high heat capacity and being an excellent solvent for many substances.

It is not non-polar and is actually considered a polar molecule. Water is an important molecule because it can form hydrogen bonds due to its polar nature, which makes it an excellent solvent for a wide range of polar and ionic substances. Its high heat capacity enables it to absorb and release heat slowly, making it an effective temperature regulator in living organisms and the environment. Additionally, water has a unique density behavior, with its density increasing as it cools until it reaches 4°C, then it becomes less dense as it freezes, making ice float on liquid water, providing a protective environment for aquatic organisms in cold temperatures.

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CO2 (carbon dioxide) is a covalent molecule. It is composed of one carbon atom bonded to two oxygen atoms through covalent bonds.

Covalent bonding is a type of chemical bond in which atoms share their valence electrons to form a stable molecule. In the case of CO2, each oxygen atom shares two electrons with the carbon atom, resulting in a stable molecule. Therefore, CO2 is a covalent compound. A covalent compound, also known as a molecular compound, is a type of chemical compound that is formed by the sharing of electrons between atoms. In covalent compounds, the atoms are held together by covalent bonds, which are formed by the overlapping of the valence orbitals of the atoms. Covalent compounds are typically composed of nonmetallic elements, and they have low melting and boiling points compared to ionic compounds. They also do not conduct electricity in their pure form, as they do not contain any free ions. Examples of covalent compounds include H2O (water), CO2 (carbon dioxide), CH4 (methane), NH3 (ammonia), and many others. These compounds are essential for life and are used in a wide range of applications, such as in medicine, electronics, and materials science.

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The formal charge of the sulfur atom that forms four bonds and has one lone pair is 0.

The formal charge can be describes as the difference between the number of the valence electrons of an atom in the neutral free state and the number assigned to the atom .

The formal charge is expressed as :

Formal charge, FC = V - N - B / 2

Where,

The FC =  formal charge

V = number of valence electrons

N = number of nonbonding valence electrons

B     = total number of electrons shared in bonds

The formal charge of sulfur = 6 - 2 - 8 / 2

The formal charge of sulfur = 6 - 2 - 4

The formal charge of sulfur = 6 - 6

The formal charge of sulfur = 0

Thus, the formal charge on sulfur is zero.

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