which terms best apply to lead ( pb )? transition element; metal main-group element; nonmetal halogen; nonmetal main-group element; metal

The mass of magnesium is 11.551 g in 45.3 grams of mgcl2.

Sulfide and magnesium have molar weights of 32.065 g/mol and 24.305 g/mol, respectively. Step 2: Use the molar mass to translate mass into moles. The amount of magnesium sulfide in 12.5 grams is therefore 0.222 moles.

Now, the substance, magnesium chloride, is shown to us. Its chemical formula is MgCl2. While chlorine has an atomic mass of 35.5 u, magnesium has an atomic mass of 24 u. Consequently, 95 u is the magnesium chloride formula unit mass.

Molar mass of

Mg = 24.3 g/mol

Cl = 35.5 g/mol

Molar mass of \(Mgcl_{2}\)=24.3 g/mol+(2×35.5 g/mol)=95.2 g/mol

43.5g \(Mgcl_{2}\)=(24.3÷95.2)*43.5=11.551

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Answer:

1. Hypnosis can help people stop smoking.(Yes)

To what extent does hypnosis work in regards to these behaviors?

A study by McNeilly and colleagues found that hypnosis may help quitters to focus on their own resources to curb cigarette cravings. Other researchers have suggested that success rates are caused by the relaxation effects of hypnosis. These might allow people to cope with nicotine addiction and nicotine withdrawal.

Would you recommend them? Why or why not?

I wouldn't recommend it because, The evidence for hypnosis as a successful smoking cessation method is a mixed bag. Some studies have seen high success rates, whilst others are more modest. A review of 59 different trials found that hypnosis is often better than no support at all.( so its a risk)

Explanation:

A molecular formula is a chemical formula for a molecular compound that shows the types and numbers of atoms in the compound's molecule. Ammonia is a nitrogen-hydrogen compound.

The total number of shared electrons in a molecule is 22.

Ionic and covalent compounds are the two types of compounds. Molecules are the most basic unit of a covalent compound, and they can be represented in a variety of ways.

Atoms are the smallest units of matter that retain an element's fundamental chemical properties. However, much of the study of chemistry is concerned with what happens when atoms combine to form compounds. A compound is a unique collection of atoms held together by chemical bonds.

The electrostatic attraction between the positively charged nucleus and the negatively charged electrons surrounding it holds the structure of the atom together, and the stability within chemical bonds is also due to electrostatic attractions. Consider the two most common types of chemical bonds: covalent bonds and ionic bonds. Two atoms share pairs of electrons in covalent bonds, whereas electrons are fully transferred between two atoms in ionic bonds.

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a. The element has a total of 6 valence electrons (2 in the ns orbital and 4 in the np orbital).b. The element that has a valence electron configuration of ns2np4 could be Selenium (Se), which has 6 valence electrons.c. The element, which has a valence electron configuration of ns2np4, will form an ionic compound with potassium by losing all its valence electrons to potassium. Hence, the compound formed will be K2Se.

d. The radius of an element depends on the number of electrons and energy levels, among other factors. Barium (Ba) is an element found in period 6 of the periodic table. In contrast, the unknown element is found in period 3. Thus, it can be concluded that the element has a smaller radius than Barium (Ba).e. Fluorine (F) is one of the most electronegative elements known. As a result, it has the highest ionization energy. The element with a valence electron configuration of ns2np4 is more significant than fluorine, but it has a lower ionization energy.

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The Conclusion, methanol poisoning can purpose histological adjustments in liver tissues.

Most importantly in instances with imply blood and vitreous humor methanol stages extra than 127 ± 38.nine mg/dL a couple of pathologic capabilities have been detected. Methanol is transformed to formaldehyde thru alcohol dehydrogenase and formaldehyde is transformed to formic acid (formate) thru aldehyde dehydrogenase.

The methanol is transformed through the liver to arsenic and may wreck the frame over time. This is real because it become discovered withinside the liver of the hen. Methanol is transformed through the liver to arsenic and may wreck the frame over time.

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The conversion of ribulose-5-phosphate to glycolytic intermediates, the enzyme phosphopentose isomerase (ribose-5-phosphate isomerase) is utilized.

In the conversion of ribulose-5-phosphate to glycolytic intermediates, the enzyme used is phosphopentose isomerase, also known as ribose-5-phosphate isomerase.

Phosphopentose isomerase is responsible for catalyzing the interconversion of ribulose-5-phosphate (a pentose sugar) and ribose-5-phosphate (another pentose sugar).

This enzymatic reaction is part of the pentose phosphate pathway (also known as the phosphogluconate pathway) in cellular metabolism.

The conversion of ribulose-5-phosphate to ribose-5-phosphate is important for the production of various glycolytic intermediates, including fructose-6-phosphate and glucose-6-phosphate.

These intermediates play crucial roles in glycolysis, a metabolic pathway involved in the breakdown of glucose to produce energy in the form of ATP.

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The type of reaction that occurs to covalently bond nucleotides is a dehydration synthesis or a condensation reaction. In nucleic acids, the covalent bonding between nucleotides occurs through a phosphate group linking the 3′ carbon atom of one nucleotide and the 5′ carbon of the next nucleotide. This bond formation is catalyzed by enzymes called DNA or RNA polymerases during replication and transcription, respectively.

In a dehydration synthesis reaction, a water molecule is eliminated during the formation of a covalent bond between two molecules. In the case of nucleotides, the dehydration synthesis reaction involves the removal of a hydroxyl group from the sugar component of one nucleotide and a hydrogen atom from the phosphate group of another nucleotide, resulting in the formation of a phosphodiester bond between them. This covalent bond connects the sugar and phosphate groups of adjacent nucleotides in the nucleic acid chain. Therefore, the formation of a phosphodiester bond in nucleic acids is an example of a dehydration synthesis reaction.

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NO₂ , SO₃ and CO are covalent compounds and LiCl is ionic in nature.

The definition of an ionic compound is chemical compound composed of ions which is held together by electrostatic forces i.e. held together by ionic bonds. They are formed by ions of opposite charge. The compound is neutral but it consists of a positively and negatively charged cations and anions.

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The pH of the buffer is 3.75. This is because the pKa of formic acid is 3.75, and the concentrations of the acid and its conjugate base in the buffer remain constant.

The pH of a buffer is determined by the concentrations of both the acid and its conjugate base. Since the pKa of formic acid is 3.75, this means the acid and its conjugate base must have concentrations of 0.20 M and 0.21 M respectively in order to keep the pH at 3.75. This is the case with the given buffer, therefore the pH is 3.75.

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To convert between a substance's count, mass, and volume, you must understand the following information: The substance's molar mass is expressed as the weight of one mole.

which is often expressed in grams per mole (g/mol). You may translate between the quantity of moles and the substance's mass by knowing the molar mass of a substance. The substance's density: The unit of measurement for density is grams per cubic centimeter (g/cm3), which represents the mass of a material per unit of volume. You can convert between a material's mass and volume by knowing the density of the substance. The compound's molar volume is: The volume of a molar is one.Typically, a chemical is measured in liters per mole (L/mol) units. You may convert between the quantity of moles and the substance's volume by knowing the molar volume of a substance.The number of atoms or molecules in one mole of a material is known as the Avogadro number.

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(a) Electron domain geometry - Octahedral.

(b) Molecular geometry - Square pyramidal.

(c) Smallest bond angle - 90°

(d) The polarity of BrF₅, best choice is: The molecule is polar and has polar bond.

(e) AsH₃ is polar molecule.

A molecule's valence shell electrons are shown in a very simple manner via a Lewis structure. It serves as a visual representation of how the electrons surrounding certain molecules' atoms are positioned.

It demonstrates the bonds that exist between a molecule's atoms and its lone pairs of electrons. When used in conjunction with hybrid orbitals, Lewis structures can also be helpful in predicting molecular geometry.

(a) Electron domain geometry - Octahedral.

(b) Molecular geometry - Square pyramidal.

(c) Smallest bond angle - 90°

(d) The polarity of BrF₅, best choice is: The molecule is polar and has polar bond.

(e) AsH₃ is polar molecule.

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Answer:B

Explanation:

Answer:

YES!

Explanation:

Answer:

False

Explanation:

check out the explanation in the attached file

Answer:

Iconic, neutral, and cation

Explanation:

When a metal and a nonmetal react, the result is a(n) Ionic compound. Ratio of cat ions and anion depends on the ionic charge of each. All ionic compounds come together in the simplest ratio to make a  neutral formula unit and the cation  is always written first in the formula.

The ionic compounds are solids in crystalline form and these are formed by opposite charged ion packing,  formed by the reaction of metals react with non-metals.

Elements can either gain or lose electrons in order to achieve noble gas configuration and these formation of ions helps them gain stability, the structure of ionic compound depend on the relative sizes of the cations and anions.

Ionic compounds are salts, oxides, hydroxides, sulphides, and the inorganic compounds. Ionic solids are held together by the electrostatic attraction between the positive and negative ions.

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Hydraulic conductivity, also known as permeability, is a property of porous materials that describes their ability to transmit fluid (typically water) through them. The hydraulic conductivity (K) for the given parameters is approximately 0.1667 m/s.

It represents the ease with which water can flow through a saturated medium under a hydraulic gradient. Hydraulic conductivity is influenced by various factors such as the properties of the porous medium (e.g., particle size, shape, and arrangement), the fluid viscosity, and the pressure gradient. It is commonly expressed in units of velocity, such as meters per second (m/s) or centimeters per second (cm/s).

To calculate the hydraulic conductivity (K) using the given parameters, let's substitute the values into the equation:

\(K = (0.4 * 10^{-3}) / ((\pi * (0.085 / 2)^2) * (0.12 / 0.18))\)

First, we can simplify the expression inside the parentheses:

\(K = (0.4 * 10^{-3}) / ((\pi * (0.0425)^2) * (0.12 / 0.18))\\K = (0.4 * 10^{-3}) / ((\pi * 0.0018025) * (0.12 / 0.18))\\K = (0.4 * 10^{-3}) / (0.0035962 * 0.6667)\\K = (0.4 * 10^{-3}) / 0.0023975\\\\K = 0.1667 m/s\)

Therefore, the hydraulic conductivity (K) for the given parameters is approximately 0.1667 m/s.

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Mercury, Venus, and Mars are all rocky planets. None are more or less different than Earth. Earth is the largest and the only planet with extensive regions of liquid water.

Explanation:

Answer:

En nuestro sistema solar, hay cuatro planetas terrestres, que también son los cuatro más cercanos al sol: Mercurio, Venus, Tierra y Marte. Durante la formación del sistema solar, probablemente hubo más planetoides terrestres, pero se fusionaron entre sí o fueron destruidos.

Dish of Cabbage, carrot, pea, cauliflower and brinjal are the meals we could enjoy that contain only plant products.

Cabbage, carrot, pea, cauliflower and brinjal are the five different plants based meals. In these meals, vegetables are used which are the parts of plant. We know that vegetables are very healthy and nutritive which can be get from plants.

So we can conclude that dish of Cabbage, carrot, pea, cauliflower and brinjal are the meals we could enjoy that contain only plant products.

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The molar mass of h2x is 222.22 g/mol

H2X + 2NaOH  → Na2X + 2H2O

Mole NaOH = concentration × volume

                    = 0.450 × 44.2 × \(10^{-3}\)

                    = 0.01989mol

Mole H2X = 0.01989 / 2 = 0.0099mol

H2X and NaOH has 1 : 2 molar ratio

Molar mass = mass / mole =2.20/0.0099 = 222.22 g/mol

A chemical compound's molar mass is calculated by dividing its mass by the number of moles measured in moles that make up the sample of that compound. In contrast to molecular properties, a substance's molar mass is a bulk property. The comp0und is present in many different forms, each with a different mass as a result of the isotopes. The mlar mass represents the average of these masses. The molar mass is most frequently calculated from the standard atomic weights and is a function of the relative abundance of the constituent atoms' isotopes on Earth. It is thus a terrestrial average. The conversion betwen a substance's mass and amount can be done using the molar mass.

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kinetic energy in gas molecules,  causes the diffusion of gases. Therefore, the correct option is option A.

Diffusion refers to the total movement of everything (for example, atom, ions, molecules, or energy) from a higher concentration region to a lower concentration region. A gradient involving Gibbs free energy as well as chemical potential drives diffusion.

It is conceivable to disperse "uphill" from either a low concentration zone to a high concentration region, as in spin odal decomposition. kinetic energy in gas molecules,  causes the diffusion of gases.

Therefore, the correct option is option A.

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Answer:

A- Before the mechanic left, the molecules were moving away from each other. When she returned, they were moving around each other.

Explanation:

Brainliest?

Answer:

beryllium atom

Explanation:

An atom with two protons is always a helium atom. If scientists count four protons in an atom, they know it's a beryllium atom.

Answer:

D. 17 electron is your answer

Answer:

E) 9.0

Explanation:

pH = -log [1×10^-9] = 9

Answer:

option B on e2020

Explanation:

I did the test

Matter are anything that is made up of atoms. The quantity of matter can be observed only on the basis of mass and volume calculation. The air particles keeps on moving constantly at high speeds. The correct option is option B.

Matter is a substance that has some mass and can occupy some volume. The matter is mainly used in science. Matter can be solid, liquid or gas.

Anything around us that can be physically seen and touched are matter. Ice, water and water vapors are example of matter.

The distance between atoms of air is very large, they do Brownian motion. These atoms are not at fixed position. They keep on moving at high speed with high kinetic energy.

Therefore, the air particles keeps on moving constantly at high speeds. The correct option is option B.

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Explanation:

When one atom supplies both electrons in forming a two-electron bond, it is known as a dative covalent or coordinate bond. ... In this case, the nitrogen atom has a lone pair of electrons that coordinates to the hydrogen cation, which has zero electrons, forming a covalent bond.