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Answer: Mass of 1 atom of Cu=63.546 A.M.U

=63.546×1.66×10^(-27) kg

= 105.48636×10^(-27) kg

So,

Mass of 1.2×1038 atoms of Cu

= 1.2×1028×105.48636×10^(-27) kg

= 130127.973696×10^(-27) kg ANS !!!!

Answer:

I think it's 2s^2 2p^4

Explanation:

NOT really sure but, I think its 2s^2 2p^4

Please, someone correct me if im wrong

ANSWER ⬇️⬇️⬇️⬇️⬇️⬇️

Answer:

electronic config. of oxygen = 2,6

The molar concentration of a solution created by decomposing 25 g of Fe(NO₃)₃ in 250.0 ml of water is 0.413M.

We divided the number of mole of solute by both the given quantity of liters of solutions to determine the mole ratio of a solution.

The quantity of a material in a specific volume of solution is known as its molarity (M). The number of moles of something like a solute each liter of a solution is known as molarity.

Briefing:

m= 25,

Molar mass(M) of Fe(NO₃)₃ = 241.86g/mol

V= 0.25dm3,

Molarity(C) = ?

Moles = m/M= C×V

Substitute and Simplify

m/M = C×V

25/241.86= C×0.25

Molarity(C) = 0.413M

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Continue adding salt to the solution until undissolved salt remains on the bottom of the container. this is now a (a)saturated solution because no more sodium chloride can dissolve. The simplest ratio of ions in the solution is (b)1 sodium ion to (c) 1 chloride ion and the simplest ratio of ions bound in the solid is (d) sodium ion to (e) chloride ion.

Water molecules pull the sodium and chloride ions apart, breaking the ionic bond that held them together. After the salt compounds are pulled apart, the sodium and chloride atoms are surrounded by means of water molecules, as this diagram indicates. as soon as this happens, the salt is dissolved, resulting in a homogeneous solution .

Dissolving a solid in liquid, inclusive of desk salt in water, is a bodily exchange because only the country of the matter has changed. A not unusual misconception approximately dissolving is that heating and/or stirring are required for the dissolving process to arise. on this observe, quantitative experimental evidence turned into accrued and analyzed to illustrate that neither heating nor stirring is required for dissolving.

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A resonance structure with formal charges closer to zero on individual atoms is preferred and resonance structure is more stable if a negative charge resides on a more electronegative atom.

Chemistry concept known as the theory of resonance that postulates that a molecule's actual normal state is represented by a combination of several alternative distinct structures rather than by a single valence-bond structure. The molecule is then said to have a structure that is a resonance hybrid of these structures or to resonate among the various valence-bond structures. The molecule is said to be stabilized by resonance when the calculated energy for a resonance hybrid is lower than the energies of any of the alternative structures. Resonance energy is the difference between the energies of any alternative structure and the energies of the resonance hybrid.

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The compound mentioned in option D having structure which is isomer of other three given option. And the rest three compound are same. Hence the correct option is D.

Isomers are substances that have exactly the same number of atoms, i.e., the same empirical formula, but differ from one another by the way in which the atoms are arranged. Several isomers with the formula C₈H₁₀ include ethylbenzene, m-xylene, p-xylene, and o-xylene. Isomers are chemical compounds that have the same chemical formula but have different characteristics and atom arrangements in the molecule. Isotopes are various atoms of a single element. Isomers are distinct substances with the same molecular structure. The number of neutrons distinguishes isotopes from each other, whereas the arrangement of the atoms distinguishes isomers.

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The complete question is as follows:

The pH of the given solution is 5.27.

In chemistry, pH, which was originally denoting as potential of hydrogen, refer to a scale used to specify the acidity or basicity of an aqueous solution. Acidic solutions are measured to have lower pH values than basic or alkaline solutions.

According to the given information,

pKa of acetic acid = 4.75

Concentration of acetic acid = 0.075m

Concentration of acetate salt = 0.25m

The pH of a simple acetate solution is given by:

pH = pKa + log(salt/acid)

Hence,

pH = 4.75 + log(0.25/0.075)

pH = 4.75 + 0.522

pH = 5.27

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1 gramme of calcium carbonate is needed to produce 1. 00 g of caco3(s).

Calcium carbonate does have a molar mass of 100.09 g/mol.

As a result, the number of moles of calcium carbonate = mass/molar mass. =1g/100.09g/mol = 0.01 mol, It is given the reaction of sodium carbonate and calcium chloride. CaCO3 + 2NaCl = Na2CO3 + CaCl2

One mole of calcium chloride reacts with one mole of sodium carbonate to produce one mole of calcium carbonate and two moles of sodium chloride.

one mole CaCl2 = one mole CaCO3

0.01 mol f CaCl2 = 0.01 mol CaCO3.

Calcium chloride molarity = 0.1 M

Molarity is characterised as the number of solute moles divided by the amount of solution.

volume of solution = 0.1 L = 100 mL = 0.01 mol/0.1 M

As a result of this, the volume of 0.1 M calcium chloride is 100 mL.

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Answer:

See explanation

Explanation:

The molecular compound name for hydrazine, N₂H₄ is dinitrogen tetrahydride.

Hydrazine, N₂H₄ is an inorganic compound which is also known as diamine or dinitrogen tetrahydride. It is named so because it consists of two nitrogen and four hydride atoms. It is a flammable liquid with a strong pungent smell like ammonia. It also acts as a strong base.

Some uses of hydrazine are:

Thus,  option C, dinitrogen tetrahydride is the correct answer.

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Warm air rises at the equator and cold air sinks at the poles creating is B convection currents.

Convection can be described as the single or multiphase fluid flow which can take place spontaneously  as a result of the combined effects of material property heterogeneity  as well as the body forces on a fluid,  especially with density and gravity.

It should be noted that in case whereby Warm air rises at the equator and cold, there will be a phenonmenon in which the air sinks at the poles which will bring about the convection currents.

Therefore, option B is correct.

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For every mole of calcium chloride you get one mole of Ca2+ and 2 moles of chloride. So the molarity of calcium 2+ is 1.5 M and the molarity of the chloride is 3.0 M

What is Molarity?

Since most reactions take place in solutions, it's critical to comprehend how the substance's concentration is expressed in a solution. The quantity of compounds in solution can be determined in a variety of methods.

The concentration of salts in the alkaline solution is represented by its molarity (M). The amount of fundamental substance needed to prepare the solution rises as molarity does. Molarity is crucial for the growth of strength.

The number of moles of dissolved solute per litre of solution is the definition of molarity, a unit of concentration. Molarity is defined as the number of millimoles per millilitre of solution by dividing the number of moles and the volume by 1000.

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Transport via pipelines is only possible for specialist goods like liquids and gases.

Gas is a state of matter that lacks both a defined shape and volume. Compared to other states pf material, such as liquids and solids, gasses have a lower density. Particles, which have a great deal of kinetic energy but aren't very attracted to one another, are separated by a lot of free space.

The Earth's atmosphere is made up of approximately % ammonia, 21 percent oxygen, 0.93 % argon, 0.04 % carbon dioxide, and small traces of bright blue, helium, methane, krypton, ozone, and hydrogen in the form of water vapor, according to the educational website Vision Starting to learn (opens in new tab).

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The methyl butanoate is the ester. the ester contains C = O, carbonyl stretching  is found about the 1735 cm⁻¹.

The methyl butanoate is from the ester family. it is also called as methyl butyrate. it is colorless liquid the odor of methyl butanoate is like an apple. methyl butanoate is used as solvent. the structure of methyl butanoate can be determine by the IR spectra. it is also used as an flavoring agent.

The methyl butanoate if from the methyl ester of butyric acid. the methyl butanoate is present is several plant product in very small amount. it is formed by the distillation from the essential oils of vegetable.

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in the disorder alters glucose metabolism, Covalent bonds hold carbon, hydrogen, and oxygen atoms together in a glucose molecule.

This glucose molecule is made up of six carbon atoms bonded together in a chain, along with oxygen and hydrogen atoms. C6H12O6 is the chemical formula for glucose. Glucose is an aldehyde-containing monosaccharide (-CHO) Covalent bonds form between nonmetals in general. The formation of ions occurs when one metal and a nonmetal convers. Carbon, hydrogen, and oxygen combine to form glucose. Because they are all nonmetals, they form covalent bonds.

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In the given statement, the reactant that is limiting is BaI₂.

What is BaI₂?

BaI₂ is a chemical compound composed of barium and iodine. It is an ionic compound, meaning that the barium and iodine atoms are held together by electrostatic forces. BaI₂ is a yellow-brown colored solid at room temperature. It is used in the production of certain semiconductor materials and in medicine as a contrast agent for imaging studies.

The reactant is limiting because the amount of BaI₂ that is needed to produce the same amount of precipitate (0.00315 moles) is double the amount of Na₃PO₄ that is needed to produce the same amount of precipitate (0.00283 moles). This means that for the reaction to proceed, there must be twice as much BaI₂ as Na₃PO₄, and since there is only 0.00849 moles of BaI₂, the reaction will be limited by the amount of BaI₂ available.

What is Precipitation reaction?

A precipitation reaction is a type of chemical reaction in which two solutions are mixed together to form an insoluble salt, which is referred to as the precipitate. This type of reaction is often used to identify the presence of certain ions in solution, as the formation of a precipitate indicates that the ions in question are present.

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The mass of O₂ in grams required to completely react with 0.025 g of C₃H₈ is 0.091 g.

The reaction is given as :

C₃H₈  +  5O₂  ----->   3CO₂   +   4H₂O

The mass of C₃H₈ = 0.025 g

mola mass of C₃H₈ = 44.1 g/mol

moles of C₃H₈ = mass / molar mass

                         = 0.025 / 44.1

                         = 0.00056 mol

moles of O₂  = 5 × 0.000567

                     = 0.00284 mol

molar mass of O₂  = 32 g/mol

mass of O₂  = moles × molar mass

                    = 0.00248 × 32

                    = 0.091 g

The mass of Oxygen required is 0.091 g to react with 0.025 g of C₃H₈ .

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In response to the question, 48.2 gram of CH4 contain 1.81*10²⁴ molecules of CH4.

A molecule is the simplest unit of any material that is composed of one or more elements and is capable of existing independently while maintaining all of the material's physical and chemical characteristics. Further atom division occurs within molecules. For instance, the symbols for the atom and molecule are O and O2, respectively.

Large biomolecules can be divided into four categories: lipids, proteins, nucleic acids, and carbohydrates. Monomers called oligosaccharides, which comprise oxygen, oxygen, or hydrogen, are the building blocks of carbs.

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The complete question is-

How many molecules of ch4 are in 48.2 g of this compound?

(a). 3.00

(b). 4.00

(c). 2.90*10²⁵

(d). 5.00*10²⁴

(e). 1.81*10²⁴

The oxygen of water molecule being electron rich abstracts the proton from the oxonium ion to form hydronium ion.

What is neutral organic?

The microbial decay of dead plant and animal matter is what causes NOM to exist in the environment. The Chemistry of Silica and Zeolite-Based Materials

What is hydrogen atom?

The chemical element hydrogen is represented by the atom known as hydrogen. The Coulomb force holds one negatively charged electron and one positively charged proton to the nucleus of the electrically neutral atom, which has one proton that is positively charged. Of the universe's total baryonic mass, atomic hydrogen accounts for about 75%.

The given reaction is an acid catalyzed hydration of alkenes. The hydration reaction converts an alkene to an alcohol.

Hydration of alkenes involves the conversion of alkenes to alcohols via the addition of water. Acid catalyzed hydration involves the presence of an acid such as sulphury acid.

Since, a carbocation is formed in the acid catalyzed hydration of alkenes, hence carbocation rearrangement occurs to form a more stable carbocation.

In the above step, the attack of double bond on the hydronium ion takes place to form a 2° carbocation. The direction of electrons is from the electron rich π bond to proton.

In the above step, the nucleophilic attack of water takes place on the secondary 2° carbocation to form the oxonium ion. The direction of movement is from the electron rich water molecule to the electron deficient carbocation species.

Finally, in the above step, the deprotonation of the oxonium ion takes place to form cyclooctane. The oxygen of water molecule being electron rich abstracts the proton from the oxonium ion to form hydronium ion.

Therefore,  the oxygen of water molecule being electron rich abstracts the proton from the oxonium ion to form hydronium ion.

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Your base titrant volume reading was 1.18 mL at the start of the titration. The base titrant volume was 23.00 mL when the titration was finished and the endpoint was reached.

When just enough titrant is added to completely neutralize the analyte solution during titration, this is known as the equivalence point. Molecules of base equal molecular weights of acid at the equivalence point in an acid-base titration and the solution is made up entirely of salt and water.

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Hydrochloric acid + sodium hydroxide -> sodium chloride + water

Sulphuric acid + copper hydroxide -> copper sulphate + water

Nitric acid + sodium hydroxide -> sodium nitrate + water

Hydrochloric acid + calcium hydroxide -> calcium chloride + water

Sulphuric acid + potassium hydroxide -> potassium sulphate + water

Hydrochloric acid + lithium hydroxide -> lithium chloride + water

Nitric acid + magnesium hydroxide -> magnesium nitrate + water

A strong acid is an acid that ionizes in water to give all its hydrogen ion. Weak acid only ionize to a certain degree. Acetic acid (CH3COOH) only ionize to give one hydrogen ion despite having other hydrogen atom.

A strong base is a base that ionizes in water to give all it hydroxide ion. Sodium hydroxide(NaOH) ionizes to give all its hydroxide ions.

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When conduct electricity an ion from this excited state, 54.4 eV of energy must be provided.

What is an definition of energy?

Energy is referred to and by scientists as the capacity for work. People have figured out how to transform energy from one type to another and then use it to accomplish tasks, making modern civilization possible. Chemical, electrical, radiant, mechanical, thermal, and nuclear energy are the six main types of energy. Additional forms including electrochemical, acoustic, electromagnetic, and others might be addressed in other studies.

Briefing:

Since this electron has an energy of,

E₂=-Z²*13.6/n² eV

=-4²*13.6/2² eV

=-54.4eV

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These numbers show that the highest mean O3 concentration occurs during the daytime and is higher than it is at night. While there is a greater mean NO concentration at night.

The NO, NO2 and NOx diurnal cycles resemble double waves. The morning peak is larger than the evening peak in size. The morning peak of NO2 arrives 1-2 hours after the NO peak, while the morning peaks of O3 appear roughly 6 hours, 5 hours, and 2 hours after the NO2 peak, respectively.

The higher levels of NOx coincide with the peak hours for vehicular emissions, which are in the morning and evening.

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The half-life of 55cr is about 2. 0 hours. The delivery of a sample of this isotope from the reactor to a certain laboratory requires 12 hours. The bare minimum of such material that should be shipped is 63.9 mg= 64 mg.

Given Information: 1.8 hours is the half-life. Formula: 0.693/k is the half-life.Where: k is the rate constant.k=0.693/1.8 =0.385 hr^-1

To determine the initial concentration, use the following formula: In the A/Ao=-kt

Where: A represents the final concentration.

A o stands for initial concentration.

It is now time

Using the exponential function on both sides:

A A。 A。 -kt = e A -kt = e A = 63.9mg

The bare minimum of such material that should be shipped is 63.9 mg= 64 mg.

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The electronic configuration of iodine is [Kr] 4d10 5s2 5p5.

During chemical bonding, two 5p electrons of iodine get excited and shift to two separate empty 5d atomic orbitals. The 5s, three 5p, and two 5d atomic orbitals of iodine hybridize to yield six sp3d2 hybrid orbitals.

One of these six hybrid orbitals contains paired electrons. These paired electrons are situated as a lone pair on the central I atom in IF5. The remaining five  sp3d2 hybrid orbitals contain a single electron each which they use for sigma bond formation with the p orbitals of fluorine atoms in IF5, one on each side of the molecule, as shown below.

The F-I-F bond angle in the IF5 molecule is 81.9°. Electronic repulsions present in the molecule distort the geometry or shape of the molecule and decrease the bond angle.

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The chemical created determines the oxidation state of sulfur. Sulphur can widen its valances because it has an empty d orbital because of its larger size. As a result, it displays oxidation states of 2, 2, 4, and 6, respectively.

The sulfur atom's oxidation number drops from 0 to -2. The following are the guidelines for determining oxidation numbers: Ions have an oxidation number of 4, while elements have an oxidation number of 5, more electronegative elements have an oxidation number of 6, and less electronegative elements have an oxidation number of 7.

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Answer: Actual Yield

When sports trainers transfer cold packs, which have temperatures dropped when ammonium nitrate dissolves in water when ice cannot be transported, the process is endothermic (Î"H > 0).

For the growth of plants in particular, and therefore for other species that get their nourishment from plants, they serve as a significant supply of nitrogen. Nitrates are used for a number of things, such as fertilizers, food preservatives, drugs, and explosives.

Nitrate poisoning may be dangerous, especially for infants. Methemoglobinemia may result from excessive nitrate consumption, which can alter how blood delivers oxygen (also known as blue baby syndrome). The risk of developing methemoglobinemia is higher in infants who are bottle-fed and under six months old.

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HClO₄(l)  → H⁺ (aq) + ClO₄⁻ (aq) for HClO4(aq) , HBr(aq)→H+(aq)+Br−(aq) for HBr(aq) and Ca(OH)₂ → Ca²⁺ + 2OH⁻ for Ca(OH)2(aq) are the equation showing how it is an acid or a base according to Arrhenius definition.

A material is referred to as an Arrhenius acid if it contains a hydrogen atom and readily emits hydrogen ions or protons in water, in accordance with the Arrhenius theory. The quantity of replaceable hydrogen ions in an Arrhenius acid is referred to as its basicity. Chloride (Cl-) and hydronium (H3O+) ions are created when hydrochloric acid is dissolved in water.

A Lewis acid is a molecule or ion that can make a covalent bond with an electron pair or donate a proton, depending on its Brnsted-Lowry or Brnsted-Lowry acid properties. The proton donors, also referred to as Brnsted-Lowry acids, make up the first group of acids.

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