The VSEPR theory allows us to determine the Select one: A. charge on an ion B. color of a compound C. bond type for a molecule D. shape of a molecule E. formula for a compound

The number of moles is  0.5 moles.

The number of moles is a measure of the amount of a chemical substance. It is defined as the ratio of the number of entities (such as atoms, molecules, or ions) in a substance to Avogadro's number (approximately 6.022 x 10^23 entities).

The mole is a convenient way to express very large or very small amounts of substances in a compact form, making it an essential tool in the field of chemistry. It is used in chemical calculations and in the determination of the mass or volume of a substance.

We have that;

8 moles of CO2 produced 6 moles of water from the reaction equation

0.7209 moles of CO2 will also produce; 0.7209  * 6/8

= 0.5 moles

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The name of the compound feO is Iron(II) oxide

A byproduct of the removal of sulfides from gases using iron oxide. In this procedure, gases are passed over a mixture of wood shavings and iron(III) oxide. spontaneous heating is a possibility. This heat could ignite something. easily started by sparks or heat coming from outside. used in electric furnace steel operations as well as for precipitating copper or lead from solutions of their salts.

FeO can be prepared by the thermal decomposition of iron(II) oxalate.

[tex]FeC_{2} O_{4}[/tex] → FeO + [tex]CO_{2}[/tex]+ CO

The procedure is conducted under an inert atmosphere to avoid the formation of iron(III) oxide [tex](Fe_{2} O_{3} ).[/tex] A similar procedure can also be used for the synthesis of manganous oxide and stannous oxide.

Stoichiometric FeO can be prepared by heating Fe0.95O with metallic iron at 770 °C and 36 kbar

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The James Webb Space Telescope (JWST) is designed to take observations in the infrared part of the electromagnetic spectrum.

In physics, an energy band is a range of allowed energies that electrons in a solid material can have. In a solid material, the electrons are confined to specific energy levels, which depend on the properties of the atoms and the arrangement of the atoms in the crystal lattice. These energy levels are often referred to as "bands," because they form continuous bands of allowed energies rather than discrete energy levels. The most important energy bands in solid materials are the valence band and the conduction band. The valence band is the range of energy levels that the electrons occupy when the material is in its ground state, while the conduction band is the range of energy levels that the electrons can occupy when they are excited to a higher energy state. In an insulator, there is a large energy gap between the valence band and the conduction band, so it is difficult for electrons to move from the valence band to the conduction band and conduct electricity. In a conductor, there is only a small energy gap between the valence band and the conduction band, so electrons can move freely from the valence band to the conduction band and conduct electricity. In a semiconductor, the energy gap is intermediate, so the conductivity can be controlled by doping or applying a voltage.

Here,

Specifically, it will operate in the wavelength range of 0.6 to 28.5 micrometers, which is longer than the visible light range that the Hubble Space Telescope observes. The infrared band is particularly useful for studying the formation of galaxies and stars, the evolution of the universe, and the properties of exoplanets, among other things.

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Option d is the correct answer to this question. The amino acid Ser performs the nucleophilic attack during the chymotrypsin mechanism.

An amino acid involved in the production of proteins is ser or serine. It is a polar amino acid because it has a -amino group, a carboxyl group, and a side chain made up of a hydroxymethyl group.

Serine is essential for the synthesis of muscle tissue, proteins, and enzymes in the body. For the correct metabolism of lipids and fatty acids, serine is required. Moreover, it aids in the creation of antibodies. Several cosmetics and skin care products use serin as a natural moisturizing agent.

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Atomic radius  decrease going from left to right across a period because atomic number of element increases, atomic number and atomic radius are inversely proportional to each other.

The atomic radius of a chemical element is a proportion of the size of its particle, normally the mean or common separation from the focal point of the core to the furthest segregated electron

Atomic radius decreases across a period since valence electrons are being added to a similar energy level simultaneously the core is expanding in protons. The expansion in atomic charge draws in the electrons all the more unequivocally, pulling them nearer to the core.

The atomic radius continues decreasing while at the same time going from left to right in a period on the grounds that the atomic(nuclear) number of the element increments which implies the quantity of protons and electrons in the molecules expands (the additional electrons being added to a similar shell).

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The neutrons are sub atomic particles. The particles which are smaller in size than an atom is known as sub atomic particles. The isotope of beryllium with mass number 9, i.e., ⁹Be has 5 neutrons.

The isotopes are defined as the chemical elements which have the same atomic numbers but different mass numbers. In isotopes, the number of neutrons differ from the number of protons. The physical properties of the elements are different.

'Be' has 3 isotopes, they are ⁷Be, ⁹Be and ¹⁰Be. Among these isotopes, ⁹Be is found to have 5 neutrons and 4 protons or electrons.

Thus ⁹Be is the most common isotope with 5 neutrons.

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The pH of the solution after the addition of 344.5 mL of the NaOH solution is 2.09.

What is Titration Reaction?

Titration is a chemical technique used to determine the concentration of a specific substance in a sample. In a titration, a solution of known concentration (the titrant) is slowly added to a solution of unknown concentration (the analyte) until the reaction between the two is complete. The reaction that takes place during the titration is called the titration reaction.

This is a problem of a weak acid titrated with a strong base. We can use the Henderson-Hasselbalch equation to solve it.

First, we need to calculate the amount of nitrous acid that is present in the initial solution before any NaOH is added. We can use the formula:

moles of HNO2 = 1.000 mol/L x 0.1221 L = 0.1221 moles

The balanced chemical equation for the reaction between nitrous acid and sodium hydroxide is:

HNO2 + NaOH -> NaNO2 + H2O

Since the molar ratio between nitrous acid and sodium hydroxide is 1:1, the amount of sodium hydroxide added is also 0.1221 moles.

Now, we can calculate the concentration of nitrous acid and its conjugate base, nitrite (NO2-), after the addition of NaOH. The volume of the final solution is the sum of the initial volumes of the two solutions:

Vfinal = 122.1 mL + 344.5 mL = 466.6 mL = 0.4666 L

The amount of nitrous acid remaining after the addition of NaOH is:

moles of HNO2 remaining = moles of HNO2 initial - moles of NaOH added

moles of HNO2 remaining = 0.1221 moles - 0.1221 moles = 0 moles

All the nitrous acid has been neutralized by the sodium hydroxide. The amount of nitrite formed is equal to the amount of NaOH added:

moles of NO2- = moles of NaOH added = 0.4000 mol/L x 0.3445 L = 0.1378 moles

The total concentration of nitrite is the sum of the initial concentration and the concentration formed by the reaction:

[NO2-]total = [NO2-]initial + [NO2-]formed

[NO2-]total = 0 + 0.1378 moles / 0.4666 L = 0.2956 M

The concentration of nitrous acid can be calculated using the equilibrium expression for the acid dissociation constant, Ka:

Ka = [H+][NO2-] / [HNO2]

We can assume that the concentration of H+ is negligible compared to the concentration of NO2-, so we can simplify the equation to:

Ka = [NO2-]^2 / [HNO2]

Rearranging the equation and substituting the values, we get:

[HNO2] = [NO2-]^2 / Ka

[HNO2] = (0.2956 M)^2 / 4.5 x 10^-4

[HNO2] = 19.43 M

The pH can be calculated using the Henderson-Hasselbalch equation:

pH = pKa + log([A-]/[HA])b

where pKa = 3.35 is the negative logarithm of the acid dissociation constant, [A-] is the concentration of nitrite (the conjugate base), and [HA] is the concentration of nitrous acid (the weak acid).

Substituting the values, we get:

pH = 3.35 + log(0.2956/19.43)

pH = 3.35 - 1.26

pH = 2.09

Therefore, the pH of the solution after the addition of 344.5 mL of the NaOH solution is 2.09.

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Acid catalyzed hydration is a reaction that involves the addition of water to an alkene in the presence of an acid catalyst. The reaction is typically carried out using a strong acid, such as sulfuric acid, which allows the reaction to proceed more quickly and efficiently.

The general reaction is as follows:

R-CH=CH-R + H₂O → R-CH(OH)-CH-R

In this reaction, the alkene undergoes an addition reaction, in which the double bond is broken and two new bonds are formed. One of the new bonds is formed between the alkene and a hydrogen atom from the water molecule, while the other is formed between the alkene and a hydroxyl group from the water molecule.

The acid catalyst plays an important role in this reaction by increasing the electrophilicity of the alkene, which allows it to react more readily with the water molecule. The acid catalyst also helps to stabilize the intermediate species that are formed during the reaction, which helps to drive the reaction forward.

Overall, acid catalyzed hydration is an important reaction in organic chemistry, and is used to produce a variety of different compounds, including alcohols and other functionalized molecules.

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Ferrous sulfate is just one of many forms of the metallic element iron. FeSO4

In its natural state, the solid mineral resembles small crystals. The crystals are usually yellow, brown, or blue-green, which is why ferrous sulfate is sometimes called green vitriol (1).

Supplement manufacturers use several types of iron in their supplements. In addition to ferrous sulfate, the most common are ferrous gluconate, ferrous citrate, and ferrous sulfate.

Most  iron in dietary supplements comes in  two forms, ferric or ferrous. It depends on the chemical state of the iron atoms.

The body absorbs iron forms  better than iron forms. Therefore, health care providers often consider iron-rich forms, including ferrous sulfate, to be the best choice for iron supplementation

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In carbon nuclear magnetic resonance (NMR) spectroscopy, the signal observed at 0 ppm corresponds to the chemical shift of the carbon atom in tetramethylsilane (TMS) used as a reference standard.

Parts per million (ppm) of the NMR spectrometer frequency are used to describe the chemical shifts of additional carbon atoms in a sample relative to the TMS signal. The electron density around the carbon atom, the hybridization of the carbon atom, and the makeup of the nearby atoms or functional groups are only a few of the variables that have an impact on chemical changes. As a result, the chemical shift of a particular carbon atom can provide details about the surroundings and structure of the molecule it is a part of.

The "residual peak" or "residual solvent peak" is another name for the signal seen in carbon NMR spectroscopy at 0 ppm.

Any leftover solvent molecules in the NMR sample might cause a signal to appear.

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The correct answer is (D) Bohr. In 1913, Niels Bohr proposed the Bohr model of the atom, which introduced the idea that electrons occupy certain energy levels are located at specific distances from the nucleus of the atom.

Niels Bohr proposed the Bohr model of the atom, which introduced the idea that electrons occupy certain energy levels, or shells, that are located at specific distances from the nucleus of the atom. He proposed that electrons can only exist in these specific energy levels, and that they can transition between levels by absorbing or emitting energy in the form of photons. The Bohr model of the atom was significant because it provided a theoretical explanation for the atomic spectra that were observed in experiments, and it represented a significant advancement in our understanding of the structure of the atom. However, it was later refined with the development of quantum mechanics, which provided a more accurate description of atomic structure.

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When the silver carbonate dissolves in the water, the ions are produced are Ag⁺  and CO₃²⁻.

The chemical compound ,silver carbonate with the chemical formula that is Ag₂CO₃ is very poorly soluble in the water. The color of the compound silver carbonate is yellow color. It is the transition metal carbonate that is the reason it will not dissolve properly in the water. The very small amount of the silver carbonate is soluble in the water. The silver carbonate is sparingly dissolves in the water.

Thus, Ag⁺  and CO₃²⁻ ion are are produce if we dissolve the solid silver carbonate in to the water.

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The net force would be 10 N.

Net force, also known as the resultant force, is the total force acting on an object after considering all individual forces acting on it. In other words, it's the sum of all forces that an object is subjected to.

The net force is calculated by adding up all the forces acting on an object in a particular direction and determining the single force that would produce the same effect as all those forces.

In this case, pushing force = 39 N, pulling force = 29 N

Net force = 39 N pushing force - 29 N pulling force

                = 10 N pushing force.

In other words, the net force is 10 N pushing.

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The molality of the solution that is formed by dissolving 27. 8 g of lii in 500. 0 ml of water is 5.56 moles/kg.

Molality is defined as the number of moles of solute per kilogram of solvent. To calculate the molality of a solution, we first need to determine the number of moles of solute in the solution and then divide that number by the mass of the solvent. In this case, the solute is LiI (lithium iodide) and the solvent is water.

The number of moles of LiI can be calculated using its molar mass:

The mass of the water can be calculated using its density:

The molality of the solution is then calculated as follows:

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The composition of homogeneous mixtures is differ. A salty-water solution, The mixture of water and sugar is an example of a homogenous mixture because both mixtures contain the same proportions of their constituents throughout.

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Players have to first entire the Gourmet Supremos: Breakthrough Thinking every day fee quest first earlier than The Importance Of Eating Well will display up as available.

As quickly as you have finished Breakthrough Thinking, Parvaneh will display up in Inazuma City. She may be discovered close to Inazuma's Adventurers' Guild. The Gourmet Supremos is a sequence of World Quests and Commissions in Inazuma and Sumeru. It revolves across the titular Gourmet Supremos, a collection of 3 human beings from round Teyvat with an hobby in nearby cuisines. For the cutting-edge first-rate revival meals in Genshin Impact, not anything can beat the Crab, Ham & Veggie Bake (forget about the lacking Oxford comma). It's additionally referred to as the Baked Vegetable Pie. This cute morsel revives any downed man or woman and heals them.

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NCl₃ has the greatest surface tension in the liquid phase. Option c is correct answer.

The compound with the greatest surface tension in the liquid phase is the one that has the strongest intermolecular forces of attraction.

Among the given options, NBr₃ and NCl₃ are both polar molecules with a trigonal pyramidal molecular geometry. The N-F bond in NF₃ is more polar than the N-Br and N-Cl bonds, but the molecule has a trigonal pyramidal molecular geometry.

Therefore, NCl₃ has the strongest intermolecular forces of attraction, and thus the greatest surface tension in the liquid phase, due to the greater size of the chlorine atom compared to the bromine and nitrogen atoms, which results in a larger surface area and stronger intermolecular forces of attraction.

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The scientist who proposed that electrons travel in paths called energy levels was Niels Bohr.

In 1913, Bohr introduced the idea of a quantized electron energy in his model of the hydrogen atom. He suggested that electrons occupy specific, discrete energy levels around the nucleus, and that they can jump between these levels by absorbing or emitting energy. The energy levels are sometimes referred to as electron shells, and the further an electron is from the nucleus, the higher its energy level. This model helped to explain the spectral lines observed in hydrogen emission spectra and became a key concept in the development of quantum mechanics. The Bohr model was later refined by subsequent research and theories, but his insight and discovery still play a key role in our understanding of atomic structure.

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The symbol of microliter is μL. It is defined as a unit of volume in the metric system.

Microliter is defined as a unit of volume in the Metric System. The symbol for microliter is μL. The base unit for this is liter and the prefix is micro. The prefix micro is derived from the Greek "mikrós" meaning small and it is symbolized as μ. It denotes a factor of one millionth (10-6) which means that there are 1,000,000 microliters in a liter. The symbol of microliter is μL.

  1 μL = [tex]10^{-3}[/tex] μL.

It is a small volume and that is measurable in a typical laboratory. The use  of microliter volumes would be in preparation of an electrophoresis sample when isolating DNA or during chemical purification. This is measured and dispensed using micropipettes.

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Option b , represents the second ionization energy of magnesium.

Ionization energy is often measured in electronvolts (eV) or joules in physics (J). The energy required to ionise a mole of atoms or molecules is given in chemistry as kilojoules per mole (kJ/mol) or kilocalories per mole (kcal/mol), respectively.

Two periodic trends that adhere to the laws of Coulombic attraction are revealed by comparing the ionisation energy of atoms in the periodic table. In a given time, ionisation energy typically increases from left to right (that is, row). In a particular group, ionisation energy typically decreases from top to bottom (that is, column).

The latter pattern is caused by the outer electron shell moving away from the nucleus more and farther, with an additional inner electron shell being added every row as one proceeds down the column.

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Anion is defined as an ion which contains negative charge.

An anion may be defined as an atom or molecule that is negatively charged. A cation is usually defined as an atom or molecule that is positively charged and carries a + charge with it.

Some of the properties of anion are given below:

Anions generally play an vital role in a wide variety of chemical and biological processes that takes place in our body. Let's consider an example, chloride ion, which is an ubiquitous ion that present in our body fluid is an anion.

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The following have thickest layer of peptidoglycan in the cell wall : gram-positive bacteria

Thickened peptidoglycan layer in Gram positive cells allows them to retain the stain ( and hence remaining 'stain positive' or 'Gram positive) where as thin layer seen in Gram negative cells cannot prevent the stain from leeching out (and hence stain and Gram negative).

Gram-positive organisms have thicker peptidoglycan cell wall as compared to gram-negative bacteria. It is 20 to 80 nm thick polymer whereas peptidoglycan layer of the gram-negative cell wall is 2 to 3 nm thick and covered with outer lipid bilayer membrane.

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The maximum solubility of Ag2CO3 in 0.02 M Na2CO3 is 2 x 10^-5 M.

The solubility of a salt can be calculated using its Ksp (solubility product constant) value and the concentration of the ions present in the solution.

The equation for the solubility of silver carbonate (Ag2CO3) in a 0.02 M sodium carbonate (Na2CO3) solution can be written as:

Ag2CO3 (s) → 2Ag+ (aq) + CO3^2- (aq)

Ksp = [Ag+]^2 [CO3^2-]

Since we know the concentration of Na2CO3 (0.02 M),

we can calculate the concentration of CO3^2- ions in the solution:

Na2CO3 (aq) → 2Na+ (aq) + CO3^2- (aq)

[CO3^2-] = 0.02 M

Plugging these values into the Ksp equation:

Ksp = [Ag+]^2 [CO3^2-]

=> [Ag+]^2 * 0.02

[Ag+]^2 = Ksp / [CO3^2-]

=> 8 x 10^-12 / 0.02

=> 4 x 10^-10

[Ag+] = 2 x 10^-5 M

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Yes  NaCl is soluble in water.

A chemical compound with a chemical formula NaCl is sodium chloride. Strong sodium ions paired to un favourable chloride ions make form  salt (Sodium chloride).

Solubility:

Water may dissolve salt because the positive part of its molecules attracts the negative chloride ions and the negative part of its molecules attracts the positive sodium ions.

The lattice of sodium chloride (NaCl), on the other hand, dissociates into individual ions when it dissolves in water, and these ions are then solved (wrapped) in a layer of water molecules.

NaCl is still thought to dissolve in water because crystalline NaCl can be recovered via solvent evaporation.

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Crude oil separation is a process that involves separating the different components of crude oil into individual fractions.

This process is usually done at an oil refinery using several different methods, including distillation and fractional distillation. Through the separation of crude oil, individual fractions such as gasoline, diesel, and kerosene are produced, which are then used for various purposes.

The first step in crude oil separation is distillation.

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Option D, II-I-III.The acidic nature of carboxylic acids can be estimated by their dissociation constant, Ka. The larger the Ka value, the stronger the acid.

Malonic acid (II) is a stronger acid than succinic acid (III) due to the presence of two COOH groups in its molecular structure. Oxalic acid (I) is the weakest acid of the three due to its small molecular size.

Carboxylic acids are organic acids that contain a carboxyl group (-COOH) in their molecular structure. The acidic nature of carboxylic acids can be estimated by their dissociation constant, Ka, which is a measure of the strength of an acid in solution. The larger the Ka value, the stronger the acid.  Malonic acid (II) has the formula CH2(COOH)2. It contains two carboxyl groups in its molecular structure, making it a stronger acid than succinic acid (III), which has the formula CH2(COOH)CO2H. The presence of two carboxyl groups in the molecular structure of malonic acid increases the number of hydronium ions produced when it dissociates in water, making it a stronger acid. Oxalic acid (I) has the formula C2O2H2. It is the smallest of the three carboxylic acids and has the weakest acidic nature. This is because it has only one carboxyl group in its molecular structure and its small molecular size makes it less likely to dissociate in water, resulting in a smaller Ka value.

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Yes, Organic Chemistry as a Second Language can be extremely helpful for students who are struggling with the concepts of organic chemistry. This book breaks down the complex principles of organic chemistry into simple, easy-to-understand explanations, which can be especially helpful for students who may have trouble with the more technical language often used in organic chemistry textbooks.

Additionally, the book includes numerous practice problems and step-by-step explanations, which can help students gain a better understanding of the material and improve their problem-solving skills. Overall, Organic Chemistry as a Second Language can be an invaluable resource for students looking to improve their understanding of organic chemistry.

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The order of increasing boiling point be Mgbr2 < Brf5 < SbCl2 < Nh3.

Atoms within a molecule are held together by intramolecular forces. There are forces between molecules known as intermolecular forces. Between nearby particles, there are forces of attraction or repulsion known as intermolecular forces (atoms, molecules, or ions).

It can be helpful to distinguish between intramolecular and intermolecular processes. While two or more reaction sites within the same molecule are engaged in intramolecular reactions, covalency changes occur in two distinct molecules during intermolecular reactions.

Atoms are held together to form molecules by intramolecular forces. Molecules are held together by intermolecular interactions to create solids and liquids.

Intramolecular bonds are the covalent connections that hold the hydrogen and oxygen atoms of a water molecule together.

Therefore, the correct answer is option d. Mgbr2 < Brf5 < SbCl2 < Nh3

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The molar mass of a Potassium permanganate molecule, KMnO₄ is equals to the 158.04 g/mol.

We have a Potassium permanganate molecule, KMnO₄. It consists one atom of potassium, one atom of Manganese and four atoms of oxygen. The mass of one mole of a substance is called its molar mass. Molar mass of a molecule is calculated by the addition of the masses of the individual atoms within the their quantities present in a molecule. So, the molecular mass of KMnO₄, is sum of individual masses of hydrogen, nitrogen and chlorine atoms with number of their atoms. The atomic mass of potassium atom, K

= 39.10 g/mol

The atomic mass of oxygen atom, O = 16 g/mol

The atomic mass of Manganese atom, Mn

= 54.94 g/mol

Now, Molar mass of KMnO₄ = 1× atomic mass of potassium + 1×atomic mass of Manganese + 4× atomic mass of oxygen atom

= 1×K + 1×Mn+ 4×O

= 1×39.10 g/mol + 1×54.94g/mol + 4×16 g/mol

= 39.10 g/mol + 54.94 g/mol + 64 g/mol

= 158.04 g/mol

Hence, the molecular mass of KMnO₄ is 158.04 g/mol.

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The atomic radius decrease on moving left to the right along the  period because the number of the electrons increases.

The number of the protons and electrons increases and  the attractive forces in between the nucleus and the electrons  will increase, this leads to the electrons closer to the nucleus and the decreasing the size of the atom. The number of the electrons will increases in the same subshell and the outermost electrons will pulled closer together to the nucleus.

Thus, the atomic radius will decreases as we move from the left to the right across the period in the period table.

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