what is another name for relative abudance?

Percent Composition
Mass
Weight​

The Ag[tex]_{2}[/tex]CO[tex]_{3}[/tex]   is formed when 25.0 ml of 0.200M AgNO[tex]_{3}[/tex] is mixed with 50.0 ml of 0.800 M Na[tex]_{2}[/tex]CO[tex]_{3}[/tex] is 0.68 g.

According the question , the chemical equation is give by :

2AgNO[tex]_{3}[/tex]   +   Na[tex]_{2}[/tex]CO[tex]_{3}[/tex]  ------->   Ag[tex]_{2}[/tex]CO[tex]_{3}[/tex]     +      2NaNO[tex]_{3}[/tex]

Given that :

volume of silver nitrate = 25.0 ml or 0.025 L

molarity M =  0.200 M

volume of sodium carbonate = 50.0 ml or 0.050 L

molarity = 0.800 M

now, no. of moles of silver nitrate  =  0.025 × 0.200 = 0.005 moles

no. of mole of sodium carbonate = 0.050 × 0.800 =  0.04 moles

the no. of moles of silver carbonate ,  =  0.5 × 0.005

                                                                =  0.0025 moles

molar mass  of Ag[tex]_{2}[/tex]CO[tex]_{3}[/tex] = 275.7 g/mol

therefor, the mass of Ag[tex]_{2}[/tex]CO[tex]_{3}[/tex] =   0.0025 moles × 275.7 g/mol

                                                 =0.68 g

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The three statements about a model of the particles in the ice:

They vibrate in place.

They are packed very closely together.

They cause the solid to have definite volume and definite shape.

For example, chemical compound water (H₂O) is liquid. Molecules of water are not rigid as in solid state (ice) and can move. In solid state (in this example ice) movement of molecules is more slow than movement of molecules in liquids (for example water).

Solids have fixed shapes and volumes because particles occupy a fixed position in the crystal lattice.

Strong cohesive forces keep particles (molecules, atoms, or ions) in place, with little void spaces, resulting in very low compressibility and thermal expansion.

Solids have high density that varies very little with temperature.

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In the mass spectrum of pentane, the presence of a peak with m/z = 57 is most likely to the detection of a butyl radical cation.

Because all molecular ions fragment, a few compounds have mass spectra that lack a molecular ion peak. That is not a problem you will encounter at A'level. In the mass spectrum of pentane, for example, the heaviest ion has an m/z value of 72.

Lines with m/z values one or two lower than one of the simple lines, for example, are frequently caused by the loss of one or more hydrogen atoms during the fragmentation process. The base peak (the tallest peak and thus the most common fragment ion) is at m/z = 57 this time. This, however, is not produced by the same ion as the pentane m/z value peak.

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The phosphate molecule that is released it is coupled to a different ADP molecule to make new molecule of ATP.

Hydrolysis of high-energy compound (ATP) using water:

ATP + H₂O → ADP + Pi

ATP is short for adenosine triphosphate.

Hydrolysis is a reaction that breaks down the chemical bonds between molecules via the addition of a water molecule.

A condensation reaction is a reaction that joins two molecules in a chemical bond.

ATP is resynthesized in a condensation reaction that adds an inorganic phosphate group to ADP. The addition of a phosphate group is catalyzed by the enzyme ATP synthase.

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Answer:

a solution which resists changes in pH when acid or alkali is added to it is known as Buffer solution

The number of particles produced is 8.1 * 10^21 particles.

The equation of the reaction is; [tex]CaCO3(s)-- > CaO(s) + CO2(g)[/tex]. We can be able to obtain the number of moles of the calcium carbonate can be obtained from;

Mass = 1.34 g

Molar mass = 100g

Number of moles =  1.34 g/ 100g = 0.0134 moles

Thus, the number of moles of carbonate that decomposed is  0.0134 moles

Given that the reaction is 1:1 and there are 6.02 * 10^23 particles in 1 mole of CaO, the number of particles of  CaO produced is;

0.0134 moles *  6.02 * 10^23 particles = 8.1 * 10^21 particles

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The molecular weight of ethanol, in the alcohol in alcoholic beverage, is 46.1 amu.

What is ethanol?

Ethanol is a substance derived from organic compounds. With the chemical formula C2H6O, it is an alcohol. EtOH, its chemical name, is also occasionally abbreviated as CH3CH2OH or C2H5OH. Alcohol is a highly flammable, colorless liquid with a strong wine-like odor and astringent flavor.

Pharmaceuticals, polymers, lacquers, polishes, plasticizers, and cosmetics are all made with ethanol. Ethanol is used in medicine as an antidote for methanol or ethylene glycol intoxication as well as a topical anti-infective.

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The volume of oxygen required at STP is 7 L.

STP is a pressure of a hundred kPa and a temperature of 273.15 k. Or, 1 mole of any perfect gasoline occupies 22.7 L at STP.

therefore, we need to discover the range of moles of oxygen required within the reaction.

using the molar mass of water,

10.five g × 1 mole of water/ 18.02 g = 0.577 moles of water.

1: 2 is the ratio between oxygen and water in a water molecule, because of this 1 mole of oxygen produces 2 moles of water.

0.577 moles of H₂O × 1 mole O₂ / 2 moles of H₂O = zero.2885 moles O₂.

So, if 22.7 L at STP is occupied via 1 mole, then

zero.2885  × 22.7 L / 1 mole = 6.548 L

Rounded to the nearest entire wide variety, we get 7 L.

consequently, the quantity of oxygen at STP is 7L.

standard temperature and strain (STP) is described as 0oC (273.15K) and 1atm strain. The molar extent of a gasoline is the extent of 1 mole of a fuel at ​​​​​​​ STP . At STP, one mole (6.02×1023 representative debris) of any gasoline occupies a volume of twenty-two.4L

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Answer:

2.640

Explanation:

Rounding to the nearest whole number would be 3 if that is needed.

The statement that correctly identifies the type of mixture is that homogeneous mixtures have parts that are distributed evenly. The correct option is c.

A homogeneous mixture is sole in which the composition is consistent throughout the solution.

Since the dissolved salt is evenly distributed throughout the salt water sample, the salt water described as an illustration is homogeneous.

The statement that accurately defines the type of mixture is that homogeneous mixtures have evenly distributed parts.

Thus, the correct option is c.

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Pepsin can begin the digestion of protein in the stomach after it is converted from pepsinogen by Hydrochloric acid (HCl)

Hydrochloric acid (HCl) converts the pepsinogen to pepsin. It breaks down the proteins into the peptides.

                    Pepsinogen ------HCl-----> Pepsin

HCl maintains a pH of 2.0 in the stomach.

Pepsin is a digestive enzyme which breaks down the protein in the stomach.

When pepsinogen and hydrochloric acid are present in the gastric juice together, pepsin takes its active form, because HCl is a very strong acid. It denatures the protein. It degrades the extra polypeptide of pepsinogen. This extra polypeptide covers the active site.

Chief cells of gastric regions secretes the enzyme pepsin in an inactive form called pepsinogen. A low pH of 1.5 to 2 activates pepsin.

Pepsin has many uses as it is used in the treatment of indigestion and pancreatitis. It helps in the digestion of food.

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The given element has 18(Ar)+1+5=24 electrons i.e., the element is Cr. Thus the Cr atom has 6 unpaired electrons.

In atomic physics and quantum chemistry, the electron configuration refers to how an atom's or molecule's electrons are arranged in their respective orbitals.

The placement of electrons in orbitals surrounding an atomic nucleus is known as electronic configuration, also known as electronic structure or electron configuration.

The electron configuration is used to describe an atom's ground state orbitals, but it may also be used to depict an atom that has ionised into a cation or anion by making up for any lost or gained electrons in the orbitals after it.

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The given element has 18(Ar)+1+5=24 electrons i.e., the element is Cr.

Thus the Cr atom has 6 unpaired electrons.

What's electronic configuration?

In atomic physics and quantum chemistry, the electron configuration refers to how an atom's or molecule's electrons are arranged in their respective orbitals.The placement of electrons in orbitals surrounding an atomic nucleus is known as electronic configuration, also referred to as electronic structure or electron configuration.

Commonly, the electron configuration is employed to describe the orbitals of an atom in its ground state, but it also can be used to represent an atom that has ionized into a cation or anion by compensating with the loss of or gain of electrons in their subsequent orbitals.

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Where corrosion protection is vital and the conduit is threaded in the field, the threads must be coated with a(n) Approved electrically conductive, corrosion-resistance compound.

What is corrosion protection?

A corrosion protection method may be a technique used to minimize corrosion such as the application of anti-corrosion coating, cathodic protection, or other methods that make metal resistant to corrosion.

Metal corrosion in most situations is usually slowed, managed, or maybe put to a stop utilizing the right techniques.

What does one mean by corrosion?

Corrosion may be a natural process which converts refined metal to their more stable oxide.It is the gradual destruction of materials {usually metals} by chemical reaction with their environment.In the most common use of the world, this suggests electrochemical oxidation of metals in reaction with an oxidant such as oxygen.

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An a-t base pair consists of 2 h-bond(s); a c-g base pair consists of 3 h-bond(s). The correct option is E.

Base pairs are the pairs that are made up of nucleotides. They are pairs of DNA bases. The base pairs are connected with each other by hydrogen bonds.

In between adenine and thymine, there are two or double hydrogen bonds present and between cytosine and guanine, there are triple bonds present.

So, there is 2 hydrogen bonds and triple hydrogen bonds in the base pairs of DNA, the genetic material.

Thus, the correct option is E, 2, 3.

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The question is incomplete. Your most probably complete question is given below:

A. 1, 2.

B. 2, 1.

C. 2, 2.

D. 3, 2.

E. 2, 3.

Answer:

Iron ore

Explanation:

Iron ore is the raw material used to make pig iron, which is one of the main raw materials to make steel

Proton a couples to proton b. proton a possesses a j-value of 3.0 Hz. the j-value proton b possesses to be 3.0hz.

A proton contains two up quarks and one down quark. A neutron contains one up quark and two down quarks. The core is held together by one of four fundamental forces, the "strong nuclear force" (gravitational and electromagnetic forces are the other two). Heavy atoms tend to have more neutrons than protons, but the number of electrons in the atom is always equal to the number of protons. Therefore, the atom as a whole is electrically neutral.

There are two types of protons and neutrons: up quarks and down quarks. Each up quark has a +2/3 charge. Each down quark has a charge of -1/3. The sum of the charges of the quarks that make up the nuclear particle determines its charge.

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The lewis structure for these anions are-

a fairly straightforward manner to visualize a molecule's valence shell electrons is through a Lewis structure. It gives insight into the pairing and association of the electrons surrounding every atom in the molecule.

every electron inside the Lewis dot structure can be represented via a dot, and a line connecting the dots is drawn to shape an electron bond.

simplest the valence electrons are taken under consideration whilst sketching the Lewis dot shape, ignoring the electrons that don't belong to the outermost shell.

The Lewis shape is the most effective and maximum constrained speculation; it does no longer describe how bonds are created or how electrons are disbursed most of the atoms. And that is visible as the essential constraint at the Lewis shape.

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Electrodes have been placed on samantha's scalp. her doctor wants to assess her brain-wave activity through the use of an electroencephalogram, or EEG. An electroencephalogram (EEG) is a test that uses small metal discs (electrodes) connected to the scalp to assess electrical activity in the brain.

Brain cells interact by electrical impulses and are constantly active, even while sleeping.  An EEG is a test that detects irregularities in your brain's electrical activity or brain waves. Electrodes comprised of small metal discs with thin wires are deposited onto your scalp during the process. An EEG is primarily used to detect and investigate epilepsy.

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The number of unpaired electrons is 7.

When an electron resides in the orbital of an atom in chemistry, it is said to be unpaired if it is not a part of an electron pair. Each of an atom's atomic orbitals is large enough to accommodate two electrons with opposite spins.

This electron configuration is known as the noble gas configuration because the core electrons in it are represented by the noble gases that have the appropriate number of electrons.

According to the electron configuration, the atom has 7 more electrons than neon. As a result, the atom is chlorine.

Unpaired electrons are the ones that appear in an orbital alone, whereas paired electrons are the ones that appear in an orbital as pairs in an atom.

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The number of unpaired electrons is 7. The element  is Chlorine.

An unpaired electron is an electron that doesn't form part of an electron pair when it occupies an atom's orbital in chemistry.

Two electrons with opposing spins can fit into each of an atom's atomic orbitals.Because the noble gases that match to the right amount of electrons represent the core electrons in this electron configuration, it is known as the noble gas configuration.

The atom possesses 7 more electrons than neon, according to the electron configuration. The atom is chlorine as a result.

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The bonds that are present in the pictured compound are C −C and C −H.

A bond is that which connects two atoms together. We know that a compound is composed of bonds. There are a number of bonds in a compound. The bonds are always as many as the atoms that need to be linked in the compound.

We know that butane a shown in the image is an alkane. An alkane has carbon - carbon and hydrogen - carbon bonds. There are no multiple bonds in the compound butane.

Thus, the bonds that are present in the pictured compound are C −C and C −H.

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Scientists use tectonics plates to understand the plates moving beneath the volcano.

According to the widely recognized scientific hypothesis known as plate tectonics, the Earth's lithosphere is made up of many sizable tectonic plates that have been steadily moving for nearly 3.4 billion years. Our globe would look drastically different if it weren't for plate tectonics. We have a stable climate, mineral and oil deposits, and oceans with a chemical balance that supports life thanks to the continuous recycling of the Earth's crust. Even now, every few hundred million years, it offers evolution a boost. The plates fit tightly against one another and sit on the heated, molten rock of the Earth's mantle like fragments of a broken shell. The plates move as a result of the heat produced by nuclear processes occurring inside the planet.

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We use laundry detergent as a liquid or powder because powder and liquid detergents have more enzymes.

What is detergent?

When present in diluted solutions, a surfactant or combination of surfactants has the ability to clean.There are many different types of detergents; one popular family is the alkylbenzene sulfonates, which are soap-like substances that are more soluble in hard water because the polar sulfonate in detergents is less likely to bind to calcium and other ions found in hard water than the polar carboxylate in soap.

Detergents in both powder and liquid form contain additional enzymes and surfactants that break down grease and slime on clothing. Additionally, because the molecules of liquid and powder soaps can move more freely than those of solid bar soap, it is simpler for them to function as nonionic surfactants.

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In a first-order reaction, it takes 23.02 days for 68 percent of the chemical to be destroyed.

Given,

fee constant for the destruction of pollutant = 0.1/day

We ought to discover the number of days it'll take for sixty eight percent of the chemical to be destroyed.

[A] = [A]₀e^⁻kt

in which [A] is the present awareness, and

[A]₀ is the initial awareness

k is the price of decrement

[A]₀ = 1

[A] = 0.1

Or, t =㏑(10)/k

Or, t = 2.302/zero.1

Or, t = 23.02 days.

for this reason the wide variety of days required for the destruction of sixty eight percent of chemicals is 23 days.

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The cellular component responsible for energy production and metabolic processes is mitochondria.

What is Mitochondria?

A double-membrane-bound organelle known as a mitochondrion is found in the majority of eukaryotic organisms. The majority of the cell's adenosine triphosphate, which is then used as a source of chemical energy throughout the cell, is produced by mitochondria using aerobic respiration.

Oxidative phosphorylation, which produces ATP using the energy released during the oxidation of the food we eat, is the traditional function of mitochondria. For the majority of biochemical and physiological processes, including growth, mobility, and equilibrium, ATP is used as the main energy source in turn.

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While burning iron shavings results in a chemical change, the formation of little particles of iron shavings is a physical change.

Small bits of iron shavings being formed are an example of a physical change because they can be transformed back into nails, whereas small pieces of iron shavings being burned on a flame are an example of a chemical change since they cannot be transformed back into their original shape. Chemical change is a change in matter that modifies the chemical properties of the substance as opposed to physical change, which modifies the matter's physical characteristics.

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Some liquid in a jar can be separated by physical means into two separate liquids, which can then be separated no further. The liquid is a mixture

What is a mixture?

Typically, a mixture is described as a fabric that is composed of  or greater separate chemical additives that are not chemically sure to each other.

The bodily mixture of some of substances wherein the characteristics of every factor are maintained as the components are combined into answers, suspensions, or colloids is known as a aggregate.

for this reason, it is feasible to bodily separate a number of the liquid in a jar into  awesome liquids, and then the drinks can now not be separated anymore.

therefore, the liquid in a jar is a combination.

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19 ml of a 5m solution of sodium borate must be added to a 200 ml solution of 50mm boric acid in order for the ph to be 9.6

Here pH=Pka-log[A]/[B]

= 9.6=9.24-log[A]/[B]

= log[A]/[B]=-0.36

Here for ml molarity formula is used

Molarity=mass/volume here mass of sodium borate is 381g/mol and volume of solution is 200ml

mass/volume=381/200=1.905/5.0×50=19ml

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