3. Balance the equation below.
_N, (g) + __H, (g) --> __NH, (g)
a. 1, 1, 1
b. 1, 2, 3
c. 1, 3, 2
d. 3, 3, 2

When an electron in a hydrogen atom at level 1 absorbs 10.2 eV of energy, it becomes excited and moves to level 2. Typically, the electron will then release this energy as a photon and return to its original level (level 1) in a process called spontaneous emission. This transition releases a photon with the same energy as the absorbed one, which is 10.2 eV.

When an electron in a hydrogen atom absorbs 10.2 eV of energy and moves from level 1 to level 2, it becomes excited. Typically, the excited electron will eventually release this energy in the form of a photon, as it returns to its ground state. This process is known as spontaneous emission. The wavelength of the photon emitted will correspond to the energy difference between the two energy levels.

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The outer shell of the given element was determined as illustrated must be a noble gas. Therefore, option D is correct.

Noble gases can be described as the 6 elements that are organized in group 18 of the modern periodic table. The noble gases are Helium, Neon, Argon, Krypton, Xenon, and Radon.

Under standard temperature and pressure, noble gases exist in the gaseous form and possess low reactivity. Therefore, noble gases are also referred to as inert gas.  All the noble gases exhibit stable electronic configurations in their valence shell that are completely filled. Noble gases generally exist as monoatomic.

The general outer configuration of the noble gases can be written as ns²np⁶,  n is the principal quantum number. Therefore, the given electron dot diagram has eight electrons in its valence shell so it is representing a noble gas.

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Part A: The initial cell potential can be calculated using the formula Ecell = Ecathode - Eanode, where Ecathode is the reduction potential of the cathode (Ni2+/Ni) and Eanode is the oxidation potential of the anode (Zn/Zn2+). From the standard reduction potential table, we can find that Ecathode = -0.25V and Eanode = -0.76V. Therefore, Ecell = -0.25 - (-0.76) = 0.51V.

Part B: To calculate the cell potential when the concentration of Ni2+ has fallen to 0.500M, we need to use the Nernst equation: Ecell = E°cell - (RT/nF)ln(Q), where E°cell is the standard cell potential, R is the gas constant, T is the temperature in Kelvin, n is the number of electrons transferred, F is Faraday's constant, and Q is the reaction quotient. At equilibrium, Q = [Ni2+]/[Zn2+]. Plugging in the values, we get Ecell = 0.51 - (0.0257/2)ln(0.500/0.130) = 0.34V.

Part C: To find the concentration of Ni2+ when the cell potential falls to 0.45V, we can rearrange the Nernst equation and solve for [Ni2+]: [Ni2+] = [Zn2+]e^((E°cell - Ecell)nF/RT). Plugging in the values, we get [Ni2+] = 0.130e^((0.51 - 0.45)2(96485)/(8.314*298)) = 0.093M.

Part D: Similarly, to find the concentration of Zn2+ when the cell potential falls to 0.45V, we can rearrange the Nernst equation and solve for [Zn2+]: [Zn2+] = [Ni2+]e^((Ecell - E°cell)nF/RT). Plugging in the values, we get [Zn2+] = 0.093e^((0.45 - 0.51)2(96485)/(8.314*298)) = 0.074M.

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Answer:

4 significant figures.

Explanation:

All non-zero numbers are significant figures.

Answer:

C. size and shape

Explanation:

Physical properties such as size, shape, color, density, magnetism or the

ability to sink or float can be used to separate the substances in a mixture..

Filtration is when matter is passed through a filter and the larger particles

are separated out. Magnets can be used to separate magnetic matter from

non-magnetic matter in a mixture. Objects that float when placed in water

can be separated from those that don’t by placing the mixture in water.

Answer:

mice

bacteria

fungi

Explanation:

that's the answer

The number of moles of H+ ions present in the given aqueous solutions are: (a) 0.864 moles (b) 0.0893 moles (c) 0.1227 moles

(a) To determine the number of moles of H+ ions present in the 1.8 L of 0.48 M hydrobromic acid solution, we need to use the equation:
moles = concentration x volume
So, moles of H+ ions = 0.48 M x 1.8 L = 0.864 moles
Therefore, there are 0.864 moles of H+ ions present in 1.8 L of 0.48 M hydrobromic acid solution.
(b) For the 47 mL of 1.9 M hydroiodic acid solution, we can use the same equation:
moles of H+ ions = 1.9 M x 0.047 L = 0.0893 moles
So, there are 0.0893 moles of H+ ions present in 47 mL of 1.9 M hydroiodic acid solution.
(c) Finally, for the 454 mL of 0.27 M nitric acid solution:
moles of H+ ions = 0.27 M x 0.454 L = 0.1227 moles
Therefore, there are 0.1227 moles of H+ ions present in 454 mL of 0.27 M nitric acid solution.
In summary, the number of moles of H+ ions present in the given aqueous solutions are:
(a) 0.864 moles
(b) 0.0893 moles
(c) 0.1227 moles
Note that the molarity (M) represents the number of moles of solute per liter of solution. We can use this information along with the volume of the solution to calculate the number of moles of H+ ions present in each case.

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Answer:

1 & 4

Explanation:

just got it right on edge

The pillar of sustainability broken by recycling electronics in India is environmental sustainability. Implementing a law that restricts electronics recycling to the US would not necessarily be the most effective solution, as it overlooks the complex global dynamics of electronic waste management.

Recycling electronics in India often involves improper disposal methods, such as burning or dismantling without proper safety measures. This leads to environmental pollution, including the release of hazardous substances into the air, soil, and water, thus violating the principle of environmental sustainability.

However, simply mandating that electronics can only be recycled in the US may not be the most optimal solution. Electronic waste is a global issue, and restricting recycling to a single country disregards the fact that electronic products are manufactured and consumed worldwide. A more comprehensive approach to addressing electronic waste would involve international cooperation, strict regulations, and monitoring of recycling practices to ensure they meet environmental standards.

Efforts should focus on improving recycling practices globally, including promoting responsible electronic waste management, developing sustainable recycling infrastructure in multiple countries, and encouraging the adoption of safe and environmentally friendly recycling practices. This approach would foster global sustainability and address the challenges associated with electronic waste disposal more effectively than a geographically limited restriction.

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209.8 g CaCl₂ will be produced if you start with 140.0g of Ca(OH)₂ and 115.6g of HCI.

Calculate the moles of each reactant using their respective molar masses:

Moles of Ca(OH)₂ = 140.0 g / 74.09 g/mol

= 1.891 mol

Moles of HCl = 115.6 g / 36.46 g/mol

= 3.172 mol

According to the balanced chemical equation, the stoichiometric ratio between Ca(OH)₂ and HCl is 1:2. This means that for every 1 mole of Ca(OH)₂, 2 moles of HCl react completely.

Moles of HCl (3.172 mol) than required to react with all the Ca(OH)₂ (1.891 mol). This means that HCl is in excess and Ca(OH)₂ is limiting the reaction.

Using the stoichiometric ratio, calculate the theoretical yield of CaCl₂:

Moles of CaCl₂ = 1.891 mol Ca(OH)₂ x (1 mol CaCl₂ / 1 mol Ca(OH)₂)

= 1.891 mol CaCl₂

To convert moles to grams, use the molar mass of CaCl₂:

Mass of CaCl₂ = 1.891 mol x 110.98 g/mol

= 209.8 g

Therefore, the theoretical yield of CaCl₂ is 209.8 g.

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The name of the compound with the formula (NH₄)₂SO₄ is ammonium sulphate.

Ammonium sulphate is a flavourless, white crystalline material that is also known as diammonium sulphate or sulfuric acid diammonium salt. The flavour is salty.

It is an inorganic salt of sulphate made when sulfuric acid and two equivalents of ammonia react.

Ammonium sulphate makes up around half of all sulphur (S) fertilisers used globally. The fact that ammonium-based fertilisers are prone to ammonia (NH3) volatilization in soils with a pH higher than 7 is well known in nitrogen (N) management, but this has not been taken into account when making judgements concerning S fertilisation.

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Answer:

petroleum

Explanation:

usually found sedimentary rock.

definition: a liquid mixture of hydrocarbons that is present in certain rock strata and can be extracted and refined to produce fuels including gasoline, kerosene, and diesel oil, oil

Compact Bone is composed of mineralized matrix and bone cells. whereas, Spongy Bone consists of a network of trabeculae, which are thin bony spicules or plates interconnected to create a porous framework.

Compact Bone:

Compact bone, also known as cortical bone, forms the outer layer of bone and provides strength and support. It is composed of mineralized matrix and bone cells.The main minerals found in compact bone include hydroxyapatite, which is a crystalline form of calcium phosphate, and calcium carbonate. These minerals contribute to the hardness and rigidity of the bone tissue.

In addition to minerals, compact bone contains several proteins that contribute to its structure and function. Collagen is the predominant protein found in the bone matrix. It provides flexibility and tensile strength to the bone, allowing it to resist breaking under stress. Other proteins, such as osteocalcin and osteopontin, are involved in mineralization processes and regulate bone remodeling.

Spongy Bone:

Spongy bone, also called trabecular or cancellous bone, is found at the inner layer of bone and forms a lattice-like structure. It consists of a network of trabeculae, which are thin bony spicules or plates interconnected to create a porous framework. This arrangement provides strength to the bone while keeping it lightweight.

Similar to compact bone, spongy bone contains mineralized matrix and bone cells. The minerals present in spongy bone are also hydroxyapatite and calcium carbonate. However, spongy bone has a higher proportion of spaces within its structure compared to compact bone.

Proteins found in spongy bone include collagen, which provides structural support, and other non-collagenous proteins involved in bone development, remodeling, and mineralization.

Overall, both compact and spongy bone consist of mineralized matrix containing hydroxyapatite and calcium carbonate, along with collagen and other proteins that contribute to the structure, strength, and function of the bone tissue. The specific arrangement and density of these components differ between compact and spongy bone, allowing them to fulfill different roles within the skeletal system.

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Bones are made up of two types of tissue: compact and spongy bone. Compact bone (cortical) forms the hard external layer of all bones while spongy (cancellous) bone forms the inner layer of all bones. Both types of bones are composed of specialized cells, mineral salts, and collagen fibers.

Our bones are made up of two types of tissue: compact bone and spongy bone. Compact bone, also known as cortical bone, forms the hard external layer of all bones and surrounds the medullary cavity, or bone marrow. This bone tissue consists of units called osteons or Haversian systems, featuring mineral matrix and living osteocytes connected by canaliculi, which transport blood.

Spongy bone, on the other hand, or cancellous bone, forms the inner layer of all bones. Unlike compact bone tissue, spongy bone tissue does not contain osteons. It consists of trabeculae: lamellae that are arranged like rods or plates. In between these trabeculae, we'll find the red bone marrow that is responsible for forming blood cells.

Both types of bone tissues contain specialized cells, mineral salts (mainly calcium and phosphorus), and collagen fibers. The integration of these minerals and proteins is critical for the robust structure and resilience of the skeletal system.

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ANSWER

the volume of the solution is 2.05 liters

EXPLANATION

Given that;

The concentration of Ca(OH)2 is 0.420M

The grams of Ca(OH)2 is 64.0 grams

Follow the steps below to find the volume of the solution

Step 1; Calculate the number of moles of Ca(OH)2 using the below formula

Recall, that the molar mass of Ca(OH)2 is 74.093 g/mol

Step 2; Find the volume of the solution in liters using the below formula

Therefore, the volume of the solution is 2.05 liters

The overall heat transfer coefficient, U, is the sum of the individual heat transfer coefficients on the inner and outer surfaces of the pipe. To find U, we need to calculate the individual heat transfer coefficients and then sum them.

First, let's calculate the individual heat transfer coefficient on the inner surface of the pipe. We can use the convective heat transfer coefficient formula:

h_inner = 5680 W/m^2 K

Next, let's calculate the individual heat transfer coefficient on the outer surface of the pipe. Again, we can use the convective heat transfer coefficient formula:

h_outer = 22.7 W/m^2 K

Now, let's find the overall heat transfer coefficient, U:

U = (1 / h_inner + 1 / h_outer)^-1

Substituting the values we have:

U = (1 / 5680 + 1 / 22.7)^-1

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Answer:

Synthesis

Explanation:

 The reaction:

                 2Mg + O₂   →   2MgO

This reaction above is a synthesis or combination reaction. In such reaction, several products combines to give a single product.

The formation of a single product from two or more reactants is classified under this type of reaction

The driving force for this reaction type is the large and negative heat of formation of the product.

The balanced equation for the reaction of two moles of sulfur dioxide with oxygen to produce two moles of sulfur trioxide is:

2 SO2(g) + O2(g) → 2 SO3(g)

To determine the enthalpy change (ΔH) for this reaction, we can use Hess's law, which states that the overall enthalpy change for a reaction is equal to the sum of the enthalpy changes for a series of reactions that add up to the overall reaction. In other words, if we can find the enthalpy changes for a series of reactions that include the same reactants and products as the overall reaction, we can add them up to find the enthalpy change for the overall reaction.

To use Hess's law in this case, we can start with the given standard heats of formation and write the equation for the formation of sulfur trioxide from its constituent elements:

S(s) + 3/2 O2(g) → SO3(g) ΔHf° = R kJ/mol

Note that the enthalpy change for this reaction is equal to the standard heat of formation of sulfur trioxide (ΔHf°). Next, we can write the equation for the decomposition of sulfur dioxide into sulfur and oxygen:

2 SO2(g) → 2 S(s) + 2 O2(g) ΔH1

Note that this reaction is the reverse of the formation of sulfur dioxide from its constituent elements, so we need to reverse the sign of the enthalpy change (ΔH1) for that reaction. Finally, we can write the equation for the reaction we are interested in, which is the sum of the formation of sulfur trioxide and the decomposition of sulfur dioxide:

2 SO2(g) + O2(g) → 2 SO3(g) ΔH2

Using Hess's law, we can express the enthalpy change for the overall reaction (ΔH2) in terms of the enthalpy changes for the two component reactions:

ΔH2 = ΔHf° - ΔH1

Substituting the given values, we get:

ΔH2 = R kJ/mol - (-Q kJ/mol) = R + Q kJ/mol

Therefore, the enthalpy change for the reaction of two moles of sulfur dioxide with oxygen to produce two moles of sulfur trioxide is equal to the sum of the standard heats of formation of sulfur trioxide and sulfur dioxide, which is R + Q kJ/mol.

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The balanced equation for the reaction of two moles of sulfur dioxide with oxygen to produce two moles of sulfur trioxide is:

2 SO2(g) + O2(g) → 2 SO3(g)

To determine the enthalpy change (ΔH) for this reaction, we can use Hess's law, which states that the overall enthalpy change for a reaction is equal to the sum of the enthalpy changes for a series of reactions that add up to the overall reaction. In other words, if we can find the enthalpy changes for a series of reactions that include the same reactants and products as the overall reaction, we can add them up to find the enthalpy change for the overall reaction.

To use Hess's law in this case, we can start with the given standard heats of formation and write the equation for the formation of sulfur trioxide from its constituent elements:

S(s) + 3/2 O2(g) → SO3(g) ΔHf° = R kJ/mol

Note that the enthalpy change for this reaction is equal to the standard heat of formation of sulfur trioxide (ΔHf°). Next, we can write the equation for the decomposition of sulfur dioxide into sulfur and oxygen:

2 SO2(g) → 2 S(s) + 2 O2(g) ΔH1

Note that this reaction is the reverse of the formation of sulfur dioxide from its constituent elements, so we need to reverse the sign of the enthalpy change (ΔH1) for that reaction. Finally, we can write the equation for the reaction we are interested in, which is the sum of the formation of sulfur trioxide and the decomposition of sulfur dioxide:

2 SO2(g) + O2(g) → 2 SO3(g) ΔH2

Using Hess's law, we can express the enthalpy change for the overall reaction (ΔH2) in terms of the enthalpy changes for the two component reactions:

ΔH2 = ΔHf° - ΔH1

Substituting the given values, we get:

ΔH2 = R kJ/mol - (-Q kJ/mol) = R + Q kJ/mol

Therefore, the enthalpy change for the reaction of two moles of sulfur dioxide with oxygen to produce two moles of sulfur trioxide is equal to the sum of the standard heats of formation of sulfur trioxide and sulfur dioxide, which is R + Q kJ/mol.

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Answer:

I didn't KNOW WHAT IS THE ANSWWR OF YOUR QUISTION IM SO SORRY

Explanation:

I WANT TO INTRODUCE SELF TO YOU CAN I

The  reaction would a decrease in container volume cause the equilibrium to shift to the left is  N₂(g) + 3H(g) ? 2 NH₃(g).

The equilibrium constant (K) expresses the ratio of the concentrations of the products to the concentrations of the reactants at equilibrium. If K is greater than 1, then the equilibrium lies toward the products; if K is less than 1, then the equilibrium lies toward the reactants. Therefore, the reaction that would shift to the left upon a decrease in container volume is the one with K less than 1.

In this case, the reaction with K less than 1 is N₂(g) + 3H₂(g) ? 2 NH₃(g). This is because there are four moles of gas on the left-hand side and only two on the right-hand side. When the container volume is decreased, the pressure increases, which favors the side with fewer moles of gas.

Therefore, the equilibrium shifts to the left to decrease the pressure.

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Approximately 2.7 liters of liquid diluent would be needed to make a 1:10 solution when added to 300 mL of a 30% solution.

To calculate the volume of the liquid diluent needed, we can set up a proportion based on the volume of the solute:

(30 grams / 100 mL) = (x grams / 3000 mL)

Cross-multiplying and solving for x:

30 grams * 3000 mL = 100 mL * x grams

90,000 grams * mL = 100 mL * x grams

x = (90,000 grams * mL) / (100 mL)

x ≈ 900 grams

Since the diluent is added to reach a total volume of 3000 mL, the volume of the diluent needed would be 3000 mL - 300 mL = 2700 mL.

Converting 2700 mL to liters:

2700 mL * (1 L / 1000 mL) = 2.7 liters

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The given sample of matter has the lowest average kinetic energy is 50g at -55°C and 2.0 atm option - A is correct answer.

The force an object experiences as a result of motion is known as kinetic energy. An object can only accelerate if a force is applied to it. We have to put in the effort to use force. Once the work is done, energy is transferred to the object, which then moves at a new, constant speed.

Kinetic energy, which can be seen in the motion of an object or subatomic particle, is the energy of motion.

The average kinetic energy is the subject of the query. Thus, the only connection is to temperature. Kinetic energy increases with increasing temperature and decreases with decreasing temperature.

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2.8×10−2 M will the cyclopropane concentration be after 235. 0 min.

The cycloalkane cyclopropane has the chemical formula (CH2)3, and it is made up of three methylene groups (CH2) that are joined together to create a ring. The structure experiences significant ring strain as a result of the ring's modest size.

\(k=3.36*{10^{-5}}{s^{-1}}\\\\K=\frac {2.303 }{t} log \frac{a}{a-x}\\\\3.36*{10^{-5}}=\frac {2.303 }{235min} log \frac{0.445}{a-x}\\\\\\3.36*{10^{-5}}=\frac {2.303 }{235*60} log \frac{0.445}{a-x}\\\\\\20.571*{10^{-2}}=log \frac{0.445}{a-x}\\\\\\1.58=\frac{0.445}{a-x}\\\\\\(a-x)=0.281\\\\(a-x)=2.8*{10^{-2}}M\)

This meant that the quick and painless induction of anaesthesia using cyclopropane and oxygen was possible Ralph Waters, an American anaesthetist, developed cyclopropane and put it to use in medicine. To save this then-expensive substance, he devised a closed system with carbon dioxide absorption. With a blood/gas partition value of 0.55 and a minimum alveolar concentration of 17.5%, cyclopropane is a reasonably strong, non-irritating, and sweet-smelling substance. .8×10−2 M will the cyclopropane concentration be after 235. 0 min.

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Science is a unique discipline that sets it apart from other fields of study. One of the key characteristics that distinguish science from other disciplines is its emphasis on reproducibility.

In other words, scientific findings and results should be consistent and repeatable under similar conditions. This helps to ensure that the data and conclusions drawn from it are valid and reliable. The scientific method requires that experiments and observations are conducted in a systematic and controlled manner, and that the results are subject to peer review and scrutiny. By emphasizing reproducibility, science helps to establish a firm foundation of knowledge that can be built upon and refined over time. This allows researchers to develop theories and explanations that are supported by empirical evidence and can be used to make accurate predictions about the natural world. In summary, reproducibility is a critical characteristic of science that helps to ensure the validity and reliability of its findings and conclusions.

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Answer:

Atoms often get electrons or lose. The atom lacks or earns a "negative" load. Then these electrons are known as ions. Positive ion - If the molecule lacks an electron, it gets more protons than ions.

Explanation:

In the single-displacement reaction between zinc and hydrochloric acid solution, the temperature typically increases, and the pressure may also increase.

When zinc (Zn) is added to a hydrochloric acid (HCl) solution, a chemical reaction takes place. The zinc reacts with the hydrochloric acid to form zinc chloride (ZnCl2) and hydrogen gas (H2). This reaction is exothermic, meaning it releases heat energy.

The release of heat energy during the reaction causes an increase in temperature in the immediate vicinity of the reaction mixture. The temperature rise can be observed by measuring the temperature of the solution or feeling the container if it is not insulated.

As the reaction proceeds, hydrogen gas is produced. If the reaction takes place in a closed container, such as a sealed flask or test tube, the production of gas can lead to an increase in pressure within the container. The pressure increase is a result of the accumulation of gas molecules in a confined space.

It is important to note that the magnitude of the temperature and pressure changes depends on the specific conditions of the reaction, such as the concentration of the acid and the amount of zinc used. The reaction rate and extent of temperature and pressure changes can be influenced by various factors, including the reaction vessel size, presence of catalysts, and reaction stoichiometry.

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\(\huge\purple{Hi!}\)

An atom is a complex arrangement of negatively charged electrons arranged in defined shells about a positively charged nucleus. This nucleus contains most of the atom's mass and is composed of protons and neutrons (except for common hydrogen which has only one proton). All atoms are roughly the same size. A convenient unit of length for measuring atomic sizes is the angstrom (Å), which is defined as 1 x 10-10 meters. The diameter of an atom is approximately 2-3 Å.

In 1897, J. J. Thomson discovered the existence of the electron, marking the beginning of modern atomic physics. The negatively charged electrons follow a random pattern within defined energy shells around the nucleus. Most properties of atoms are based on the number and arrangement of their electrons. The mass of an electron is 9.1 x 10-31 kilograms.

One of the two types of particles found in the nucleus is the proton. The existence of a positively charged particle, a proton, in the nucleus was proved by Sir Ernest Rutherford in 1919. The proton's charge is equal but opposite to the negative charge of the electron. The number of protons in the nucleus of an atom determines what kind of chemical element it is. A proton has a mass of 1.67 x 10-27 kilograms.

The neutron is the other type of particle found in the nucleus. It was discovered by a British physicist, Sir James Chadwick. The neutron carries no electrical charge and has the same mass as the proton. With a lack of electrical charge, the neutron is not repelled by the cloud of electrons or by the nucleus, making it a useful tool for probing the structure of the atom.

Even the individual protons and neutrons have internal structure, called quarks. Six types of quarks exist. These subatomic particles cannot be freed and studied in isolation. Current research continues into the structure of the atom.

Electron and molecular geometries, respectively, for hydrogen sulfide H₂S is electron geometry is linear and molecular geometry is bent

Molecular geometry is the three dimensional arrangement of atom that constitute a molecule and there are two lone pair present on the sulfur central atom in the H₂S molecule hence it will contract the bond pair and this make its shape appear like a bent structure and therefore the molecular geometry or shape of H₂S is bent while its electron geometry is tetrahedral because of four electron group around the sulfur

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Answer: 3, 2

Explanation: right on edge 2020

Answer:

The answer are 3 and 2

Explanation:

just took it