suppose that an element has two isotopes. the average atomic mass of the element is 48.184 u48.184 u . one isotope has a mass of 42.450 u42.450 u and an abundance of 35.385.38% . calculate the mass of the second isotope.

Answers

Answer 1

The mass of the second isotope is 49.08 u.

Average atomic mass is 45.737 u, while the abundance of isotope 1 is 40.149 u.

? isotope 2?

Process

1.- Determine the isotope 2 abundance: abundance isotope 1 plus abundance isotope 2 equals 100%

100 = 37.46 + abundance isotope 2

Amount isotope 2 equals 100 - 37.46 Amount isotope 2 equals 62.54

2.- Determine the mass of isotope 2. Average atomic mass = (abundance x mass isotope 1) + (abundance x mass isotope 2) 45.737 = (0.3746 x 40.149) + (62.54 x mass isotope 2) Mass isotope 2 = [45.737 - (0.3746 x 40.149)]

62.54 mass isotope 2 equals [45.737 - 15.0398] 62.54 mass isotope 2 equals 30.6972 62.54 mass isotope 2 equals 0.4908 x 100 mass isotope 2 equals 49.08 u

What is an isotope ?

Isotopes are members of the same family of elements as that element but have varying numbers of neutrons. The Periodic Table's atomic number of an element is determined by the number of protons it contains. The atomic number 6 of carbon, for instance, has six protons.

Any of two or more types of chemical element atoms that have the same atomic number and essentially the same chemical behavior, but different atomic masses or mass numbers and different physical qualities

Uranium-235, uranium-238, tritium (hydrogen-3), chlorine-36, and carbon-14 are a few examples of radioactive isotopes. There are certain isotopes that have exceptionally lengthy half-lives (in the order of hundreds of millions of years). Stable nuclides or stable isotopes are the terms used to describe these isotopes.

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Related Questions

How can cells be in osmotic equilibrium but chemical and electrical disequilibrium?

Answers

Cells be in osmotic equilibrium but chemical and electrical disequilibrium because water moves freely between most cells and the extracellular fluid

When the concentrations are equal on both sides of the membrane called osmotic equilibrium in cell  this results in zero osmotic pressure as there is no force needed to prevent any flow. in other words, the tonicity is the same on both sides of the membrane. by diffusion of water or solutes, osmotic balance ensures that optimal concentrations of electrolytes and non-electrolytes are maintained in cells in this method osmosis maintain equilibrium in the cell not chemical and electrical equilibrium that's why osmotic equilibrium in the cell but chemical and electrical disequilibrium in the cell.

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If there are 5.80 moles of h, how many moles of each of the compounds are present?

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[tex]Moles \: of \: H _2SO_{4} \: is \: is \: 2.9 \: moles.[/tex]

[tex]Moles \: of \: C _2H _4O _2 \: is \: 1.4 \: moles. [/tex]

[tex]Moles \: of \: NaOH\: is \: 5.8 \: moles.[/tex]

The total number of moles of hydrogen in all the compounds = 5.8 mol.

The number of hydrogen present in sulphuric acid = 2.

Let the number of moles of the sulphuric acid present

be X. [tex]Number \:of \: mol \: of H_2SO _4 \:present [/tex]

is,

[tex]1 \: mole \: of \:H _2SO_{4} \: has \: 2 \: moles \: of \: H.[/tex]

[tex]X = 5.8 \times \frac{1}{2} [/tex]

[tex]X = 2.9 \: moles[/tex]

Thus, the number of moles of sulphuric acid present is 2.9 moles.

Number of hydrogen present in acetic acid = 4

Let the number of moles of acetic acid be Y.

[tex]Number \:of \: mol \: of C _2H _4O _2 \:present [/tex]

is,

[tex]Y = 5.8 \times \frac{1}{4} [/tex]

[tex]Y = 1.4 \: moles[/tex]

Thus, the number of moles of acetic acid is 1.4 moles.

The number of hydrogen present in sodium hydroxide = 1.

Let the number of moles of sodium hydroxide be Z.

[tex]Number \:of \: mol \: of \: NaOH\:present [/tex]

is,

[tex]Z = 5.8 \times \frac{1}{1} [/tex]

[tex]Z = 5.8 \: moles[/tex]

Thus, the number of moles of sodium hydroxide is 5.8 moles.

5.8 moles. [tex]Therefore, \: moles \: of \: H _2SO_{4} \: is \: [/tex]

[tex]is \: 2.9 \: moles. \: \:Moles \: of \: C _2H _4O _2 \: is[/tex]

[tex]is \: 1.4 \: moles. \: Moles \: of \: NaOH\: is[/tex]

5.8 moles.

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a sample of sodium bromide, nabr, contains 22.34% sodium. if the sample was contaminated with sodium chloride, nacl, would the mass percent of na in the contaminated sample be higher or lower than the pure sample? justify your claim.

Answers

In a sample of sodium bromide, NaBr contains 22.34% of sodium. If the sample was contaminated with sodium chloride, NaCl, then the mass percent of Na in the contaminated sample would be higher than the pure sample.

Mass percent can be determined by the formula:

Mass percent = (mass of substance/Total mass of the sample) × 100

The sample contains NaBr which has 22.34 g of Na in 100g of the sample.

If only NaBr was added then, the mass percent would not increase as the the amount of increase in Na is same as the increase in the amount of total sample.

But, NaCl is added as a contaminant so the increase in amount of sample is more than the increase in amount of total sample because the mass of Cl is   is less as compared to Br. so, mass percent increases on contamination of NaBr with NaCl

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What is the number of grams in one mole of(a) hydrogen gas (a diatomic element),(b) helium,(c) carbon monoxide, and(d) water.

Answers

Given:

      Mole = 1

Formula:

      Moles = Given mass / Molar mass

a) Molar mass of hydrogen = 2.016

   Mass = 1 * 2.016

  Mass = 2.02g

b)Molar mass of Helium = 4

  Mass = 1 * 4

  Mass = 4g

c)Molar mass of carbon monooxide = 28

  Mass = 1 * 28

  Mass = 28g

d)Molar mass of water = 18

  Mass = 1 * 18

  Mass = 18g

The substance's intense property, the molar mass, is independent of the sample's size. The coherent unit of molar mass in the SI is kilograms per mole (kg/mol). Molar masses are, however, virtually generally given in g/mol due to historical considerations.

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Complete and balance the following redox reaction in basic solution. zn(s)=zn(oh)42-(aq) h2(g)

Answers

The Balanced redox reaction is:

[tex]2H_2O + Zn (s) + 2OH^- \rightarrow Zn(OH)_4^2^- (aq) + H_2 (g)[/tex]

In that total redox reaction,

one half reaction of cell is [tex]Zn \rightarrow Zn^2^+ + 2e^-[/tex]

the other reaction is [tex]2OH^- + 2e^- + 2H_2O \rightarrow H_2 + 4OH^-[/tex]

Redox reactions are balanced in basic solution just as they would be in acid. You utilize [tex]OH^-[/tex] for conversion to base at the end.

The steps for balancing a redox reaction in a basic solution are as follows:

1. Split the reaction into half reactions.

2. Balance the other elements, except H and O.

3. By adding water, the O atoms are balanced.

4. By adding [tex]H^+[/tex], balance the H atoms.

5. To remove any [tex]H^+[/tex], add [tex]OH^-[/tex] ions to both sides.

6. To create [tex]H_2O[/tex], combine [tex]H^+[/tex] and [tex]OH^-[/tex].

7. Make things simpler by removing extra water.

8. Equalize the charges by including [tex]e^-[/tex]

9. Combine the half reactions, then simplify.

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The molecular formula for both cis-2-butene and trans-2-butene is c4h8. compounds which have the same molecular formula but have different structures are called:______.

Answers

The molecular formula for both the cis-2-butene and trans-2-butene is c4h8. The compounds which have the same molecular formula but have different structures are called isomers.

What are isomers?

Isomerism, the existence of molecules that have same numbers of the same kinds of atoms (and hence the same formula) but differ in chemical and physical properties.

Stated colloquially, isomers are chemical compounds that have same parts but are nonetheless not the same. To make crude analogy, two bracelets, each consisting of five red and five green beads, could be arranged in many different isomeric forms, depending on the order of the colors.

Each bracelet would have the same parts—that is, five red and five green beads—but each variation would be different. One could also imagine combinations of those same beads in which the pendant chains were attached to a bracelet in a variety of ways. One might imagine two bracelets of the same red-green order but with the identical chains attached in different orientations. Such structures also would be analogous to the isomers. In a more subtle analogy, one’s hands can be seen as an isomeric. Each hand possesses same kinds of fingers, but a right hand can never be superimposed perfectly on a left hand; they are different.

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Of the following, which atom has the smallest atomic radius?
a. sr
b. po
c. te
d. ba

Answers

The atom that has the smallest atomic radius is Tellurium(Te).

The modern periodic table contains 118 elements which have been divided into 18 groups horizontally and 7 periods vertically, as shown in the adjoining diagram.

In the second diagram, the trends that vary across periods and groups are shown.

We can see that the atomic radius increases on going down the group in the periodic table and decreases on moving left to right.

We have to compare the radius of the following four elements:

Strontium Sr (Group 2, Period 5)

Polonium Po (Group 16, Period 6)

Tellurium Te (Group 16, Period 5)

Barium Ba (Group 2, Period 6)

Among the above elements, Tellurium has the smallest atomic radius according to the trends in the periodic table.

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Please help me! This is due in 10 minutes, WILL GIVE BRAINLIEST!

Acrylonitrile and ethyl acetate have the same boiling point: 77.2ºC. In one to two sentences, explain what outcome you would expect if a mixture of these two substances were distilled

Answers

Answer:

Acrylonitrile and ethyl acetate will be collect together since they both have the same boiling point. The method of distillation between the boiling points of the acrylonitrile and ethyl acetate. Since they have the same boiling point the two substances turn into vapor at the same temperature and are collected simultaneously. Hence separation is not achieved by distillation

Explanation:

UwU

have a nice day!

Mylie~

A molecule with a long chain of carbons bonded together and flanked by hydrogens with an acid group on one end and a methyl group on the other end is called a?

Answers

A molecule with a long chain of carbons bonded together and flanked by hydrogens with an acid group on one end and a methyl group on the other end is called a fatty acid.

A fatty can be saturated as well as unsaturated. Saturated fatty acids are the ones that do not have any double or triple bond in them. Unsaturated fatty acids are the ones that have double bonds or triple bond in them.

Some of the examples of fatty acids are stearic acid, palmitic acid, linoleic acid etc.

Some common examples of food products having fatty acid in them are walnuts, fish, butter, milk etc.

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Repeating an entire experiment more than once is

Replication

Trial

Research

Experiment

Answers

Answer: Replication duh NO offensene

Explanation:

Which formulas both represent compounds? HELP ME PLS!

Answers

Answer: D

Explanation: Co 2 and H2O

Hazardous gas released from a factory’s smokestack is an example of __________ externality. a. local b. positive c. resource d. negative

Answers

Answer: D. negative

Explanation:

What mass of co2 is produced when 25.00 ml sample of ethanol (density = 0.789 g/ml) combusts?

Answers

The mass of CO2 gas is 19.725 grams when a 25.00 ml sample of ethanol with a density of 0.789 g/ml combusts.

What is Density?

Density may be defined as a type of physical property that significantly deals with the description of how much space an object or substance takes up with respect to the amount of matter in that object or substance.

In a more simple sense, it is characterized as the measurement of quantity or mass per unit of volume in a particular substance.

According to the question,

The mass of the CO2 = ?

The density of the CO2 gas = 0.789 g/ml.

The volume of CO2 gas = 25.00 ml.

The formula for calculating the density is as follows:

Density = Mass/Volume.Mass = Density × Volume.

                  = 0.789 g/ml × 25.00 ml. = 19.725 grams.

Therefore, the mass of CO2 gas is 19.725 grams when a 25.00 ml sample of ethanol with a density of 0.789 g/ml combusts.

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What descriptive term is applied to the type of diene represented by 2,4-hexadiene?.

Answers

The descriptive term applied to the type of diene represented by 2,4-hexadiene is conjugated diene.

Dienes are compounds which contains two double bonds. These dienes can be non conjugated or conjugated.

Conjugated diene are those compound which have two double bonds  joined by a single σ bond. Conjugated dienes can also be called 1,3-diene. To know if diene is conjugated or non conjugated, sp³ hybridization is to b checked and the number of double bonds and single sigma bond is checked.

Conjugated dienes are found in many different molecules. 2,4-hexadiene is a conjugated diene with two carbon-carbon double bonds that are separated by one sigma bond.

The stabilization of dienes by conjugation is better than the aromatic stabilization. Conjugated dienes are more stable than non conjugated or cumulative diene because it has higher electron density of molecules delocalized.

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mass = 10g
volume = 25mL
Find the density, Remember: density = mass/volume

Answers

Answer: p = 4.0E-7 g/cm^3

identify the properly written and balanced equation for the precipitation reaction between potassium phosphate and magnesium sulfate.

Answers

The reaction is double displacement reaction of potassium phosphate and magnesium sulfate between balanced equation for the precipitation reaction is

2 K3PO4 + 3 MgSO4 → Mg3(PO4)2 + 3 K2SO4

Here reaction is  between potassium phosphate and magnesium sulfate we have to understand the balance chemical equation. precipitation reactions are double displacement reactions in which the conversion of a solution into solid by converting the substance into insoluble form or by making the solution a super saturated one. here the reaction is two mole of  aqueous tribasic potassium phosphate react with three mole of aqua magnesium sulphate to form one mole of solid farringtonite and three mole of aqueous potassium sulphate this is balanced chemical reaction of potassium phosphate and magnesium sulfate.

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Formation of hydrogen bonds requires hydrogen atoms and what else? polar covalent bonds water ionic bonds oxygen

Answers

Formation of hydrogen bonds require hydrogen atoms and Oxygen atoms, fluorine atoms, or nitrogen atoms.

Hydrogen bond is a special case of dipole-dipole force of attractions. Here there are two polar molecules in which one of them has hydrogen atom with partial positive charge on it and the other molecule can be O, F or N with partial negative charge. Since, these dipole-dipole force of attractions are stronger than other dipole-dipole force of attractions we name it as Hydrogen bonds.

Some of the examples where hydrogen bonding is present are- H₂O, HF, NH₃ etc

Since, Hydrogen bonds are a type of dipole-dipole forces of attraction, they are present in polar covalent molecules.

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explain why the keto-enol equilibrium constant for dimedone is much greater than the constant for acetone.

Answers

The strength of a carbon-oxygen double bond exceeds that of a carbon-carbon double bond.

What is a double bond?

A double bond is a covalent link between two atoms in chemistry that involves four bonding electrons rather than the two in a single bond. In alkenes, for instance, double bonds typically form between two carbon atoms.

There is always a sigma and a pi bond present in a double bond. Carbon dioxide is a common instance of a chemical having a double bond. The structure of organic substances like ethene, commonly referred to as ethylene, methanoic acid, and acetone, includes double bonds.

Carbon-carbon double bonds are found in alkenes, which are hydrocarbons. For molecules with a single double bond, their typical formula is CnH2n ( no rings). Because ethene was originally called olefiant gas, another name for alkenes is olefins.

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certain meteorites have been examined and found to carry samples of which molecules? select all that apply.

Answers

Some examined meteorites contain would be lipids, nucleotides, amino acids, and monosaccharides.

What are meteorites?

Meteorites are considered to be the pieces of rocks or metals that fall into the earth from outer space. These rocks/metals have been extensively studied/analyzed by some researchers, especially those seeking to prove/disprove Panspermia theory that life originates from other planets.

Several studies conducted found the compounds such as lipids, DNA, RNA, and amino acids.

There has been no evidence for the monosaccharides for a long time until 2019 when an international team discovered sugars such as xylose and arabinose in certain meteorites.

No polypeptide has been discovered in the meteorites, but its precursor, amino acids, have been discovered.

Therefore, the correct answer to the molecules that have been found in the some meteorites would be lipids, nucleotides, amino acids, and monosaccharides.

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The variables for this experiment include mass, volume and the materials in the various balls, as well as their
densities. In Part II, you will be comparing an inflated football with a deflated one. Use the drop-down menus to
complete the sentences and identify the independent and dependent variables.

Answers

The mass of air inside the balloon is an independent variable, whereas the balloon's volume is a dependent variable.

When compared to the deflated balloon, the expanded balloon has a bigger capacity.

The following are some of the variables connected to the inflated and deflated balloons:

volume of the balloon and the amount of air inside it

The amount (mass) of air inside the balloon determines the balloon's volume.

What are dependent and independent variable ?

There are often two different sorts of variables in analytical health research. We anticipate that independent variables will have an impact on dependent variables. What occurs as a result of the independent variable is referred to as a dependent variable.

As a result, we can say that the balloon's volume is a dependent variable and its air mass is an independent variable.

The balloon's volume grows as the volume of air inside it does.

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The energy for passive transport comes from: group of answer choices atp gtp the gradient of the thing being transported secondary transporters protein pumps

Answers

Passive transport obtains energy from the gradient of the substance or molecule being transported.

Passive transport is the movement of a solute from one side of the cell membrane where there is a high electrochemical potential to the other side where there is a lower electrochemical potential.

A kind of cellular transport known as passive transport involves the movement of molecules and ions along concentration gradients. In contrast to active transport, the mechanism doesn't need metabolic energy (such as ATP) because the movement is downhill or down the concentration gradient.

A few characteristics of passive transport are as follows:

1) The molecule must be bound in order to be transported.

2) The chemical being delivered is particular to it.

3) The gradient of the material being carried produces the energy needed for passive transport.

4) A conformational shift leads to the substance's transport.

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he famous miller–urey experiment was conducted in 1953. this experiment tested the hypothesis that primitive earth conditions were favorable for creating complex organic compounds from simple compounds. classify the compounds according to whether they were inputs or outputs in this experiment.

Answers

Answer:

C

Explanation:

what is the overall charge of the most abundant tripeptide species at neutral ph (ph 7.0)? enter your answer as a whole numbe

Answers

The most abundant tripeptide species at neutral ph (ph 7.0) the overall charge 0

A peptide consisting of three amino acids. a tripeptide is a peptide derived from three amino acids joined by two or sometimes three peptide bonds function of peptides is determined by the constituent amino acids and their sequence Glutathione (γ-glutamyl-cysteinyl-glycine)  is the example of tripeptide called tripeptide. here at 7 ph the overall charge of the most abundant tripeptide species is 0 because at 7 ph means it is in neutral condition so net charge is 0

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colligative properties are properties of a solution that depend only on the of solute particles in a given volume of solution, not on their .

Answers

Colligative properties are properties of a solution that depend only on the number of solute particles in a given volume of solution, not on their type.

What are Colligative properties?

Colligative properties of solutions are characteristics that depend on the quantity of molecules or ions in the solute, but not on the kind of solute. Osmotic pressure, boiling point elevation, freezing point depression, and vapor pressure reduction are examples of Colligative properties.

A property of a solution is said to be collative if it depends simply on the proportion of solute to solvent particles in the solution and not on the nature of the solute.

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When titrating a weak acid with a strong base, the ph half way to the equivalence point is 2.4. what is ka for this acid? will the ph be acidic, basic, or neutral at the equivalence point?

Answers

When titrating a weak acid with a strong base The equivalence point for a weak acid-strong base titration has a pH > 7.00.

If the concentration of weak acid is adequate to the concentration of the conjugate base, then the ratio of their concentrations is adequate to one. and therefore the log of one is equal to zero. Therefore, the pH is adequate to the pKa value of the weak acid at the half equivalence point

Why is pH at half titration adequate to pKa?

Because of the incomplete dissociation of the acid, the reaction is in equilibrium, with an acid equilibrium constant , Ka, which is restricted to that acid. point are the identical . Therefore, at the half-equivalence point, the pH is adequate to the pKa.

What does one mean by titration?

titration, process of qualitative analysis in which the quantity of some constituent of a sample is determined by adding to the measured sample an exactly known quantity of another substance with which the desired constituent reacts in a definite, known proportion

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Chernobyl expelled lots of cs-137 radioisotopes in the environment in 1986. the half-life of cs-137 is 30 years. in 2046, 60 years later, the radioactivity will be _____ the original activity in 1986.

Answers

Chernobyl expelled lots of cs-137 radioisotopes in the environment in 1986. the half-life of cs-137 is 30 years. in 2046, 60 years later, the radioactivity will be zero times the original activity in 1986.

What is half life of a substance?

A drug's half-life is an estimation of how long it will take for its concentration or amount in the body to exactly halve (or 50%) in size. T12 represents half-life.

This well-known phrase was first used in 1907 by renowned physicist Ernest Rutherford, who used the half-life formula to estimate the age of rocks by observing how long radium took to decay into lead.

Here, its said that the half life of Cs-137 is 30 years, that is after 30 years, half of the Cs-137 would have disintegrated, and after 60 years the entire molecule would have disintegrated, hence, after 60 years that is in 2046 the radioactivity would be zero.

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Phosphorus-32 has a half-life of 14.0 daysdays. starting with 2.00 gg of 32p32p, how many grams will remain after 112 daysdays pearson?

Answers

By the half-life of radioactive, the remaining mass of radioactive elements is  7.8125 x 10¯³ gram.

We need to know about the half-life of the radioactive elements to solve this problem. The radioactive element will decay over time and follow the equation

N = No(1/2)^(t/t'')

where N is the final quantity, No is the initial quantity, λ is the decaying constant, t is time and t'' is the half-life of a radioactive element.

From the question above, we know that

t'' = 14 days

No = 2 grams

t = 112 days

Calculate the remaining mass

N = No(1/2)^(t/t'')

N = 2(1/2)^(112 / 14)

N = 7.8125 x 10¯³ gram

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In the preparation of primary amines, how can direct nucleophilic substitution between nh3 and alkyl halide be made more practical than reacting nh3 and the alkyl halide in a 1:1 ratio?

Answers

Direct nucleophilic substitution between NH₃ and alkyl halide be made more practical than reacting NH₃ and the alkyl halide in a 1:1 ratio By Using a large excess of NH₃.

Why is direct nucleophilic substitution of an haloalkane with NH₃ not a very useful method for preparing primary amines?

Polyalkylation of the amine will end in multiple products

What happens when haloalkane reacts with NH₃?

Ch₂₂: RX + NH₃. Ammonia reacts as a nucleophile with alkyl halides to offer primary amines in a nucleophilic substitution reaction. Yields are often poor because the product, a primary amine, RNH₂, is itself a nucleophile and may react with more alkyl halide.

Is NH₃ a robust nucleophile?

NH₃(Ammonia) has the stronger nucleophilic character than water molecule. Because the Oxygen within the water molecule doesn't likely to bond with any carbon atom compared to Nitrogen atom. Since Oxygen has more electronegativity than Nitrogen. Hence it holds onto its lone pair tightly than Nitrogen.

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icolaou, k. c.;montagnon, t.; baran, p. s.; zhong, y.-l. iodine (v) reagents inorganic synthesis. part 4. o-iodoxybenxoic acid as a chemospecifictool for single electron transfer-based oxidation processes.j. am.chem. soc.2002,124, 2245.

Answers

Oxygen is a good oxidant because it has the highest electronegativity, which is 3.44.

What is an oxidant ?

A reactant that oxidizes or eliminates electrons from other reactants in a redox reaction is referred to as an oxidant. An oxidizer, oxidizing agent, or oxidant are several terms for the same thing. An oxygenation reagent or oxygen-atom transfer (OT) agent is a term that may be used to describe an oxidant that contains oxygen.

The loss of electrons in oxidation (OIL RIG). A material that oxidizes therefore steals electrons from the other substance. As a result, an oxidizing agent needs to pick up electrons.

Flourine is the most effective oxidizer. The highest positive electrode potential value is present in it. Halogens function as a potent oxidizing agent because of their high electronegativity and electron affinity.

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a 6 carbon glucose molecule is broken down t 2 molecules of 3 carbon pyruvate cleavage, where ater molecule is broken off a frucose 1-6 bisphophate

Answers

In glycolysis, one glucose (a 6-carbon molecule) is broken down into 2 pyruvate molecules (each 3-carbon molecule). this process occurs in two separate reactions. a particular toxin, Changchun, found in poison slugs, targets one of these reactions and renders the carbons in that particular pyruvate radioactive and thus, unstable.

What is glycolysis?

Glycolysis is the process in which glucose is broken down to produce energy. It produces two molecules of pyruvate, ATP, NADH, and water.  the method takes place in the cytosol of the cell cytoplasm,  within the presence or absence of oxygen. Glycolysis is the primary step of cellular respiration.

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Which of the following is NOT an economic responsibility of starting a sole proprietorship?O obtaining a business licenseO getting a site permitO registering a business nameO quickly selling off selling company stocks brook has 3,250 in her savings account. she plans to save an additional 175 each month. Brook wrote a linear function to represent y, the total amount of savings after x months. what did she do wrong?4= 175(x + 3,250) What is the quotient of (56) (4) 7?What is the quotient of (56) (4) 7? what did these migrations have in common: prehistoric people of central asia moved to north america during the last ice age. early people of the middle east moved into northern mesopotamia Read pages 5-6 of the story. What do the characters do during this event? (1 point) The girls find out that they have more in common than they thought. The girls find out that they have more in common than they thought. The girls find out they are really different from one another. The girls find out they are really different from one another. The girls find out that they both work very hard. The girls find out that they both work very hard. The girls find out that their parents are very similar. You start a savings account with $200 and save $30 each month. Let f(n) be the amount in the account before the nth month. How much money will you have invested at one year? Flash memory is a type of _____________ memory. a) Primary b) RAM c) Secondary d) All of these QuestionRefer to Explorations in Literature for a complete version of this story.In The Pit and the Pendulum, the narrator explains, "I proceeded for many paces; but still all was blackness and vacancy."How does Poe's inclusion of this description affect the story?It creates dark humor by making readers imagine how foolish the narrator must look in this situation.It creates dark humor by making readers imagine how foolish the narrator must look in this situation.It increases the suspense by maintaining the narrator's sense of displacement and uncertainty.It increases the suspense by maintaining the narrator's sense of displacement and uncertainty.It contributes to the story's rather serene mood by describing the peaceful emptiness of the environment.It contributes to the story's rather serene mood by describing the peaceful emptiness of the environment.It adds mystery to the tale by subtly suggesting that the narrator has something to hide.It adds mystery to the tale by subtly suggesting that the narrator has something to hide.Skip to navigation Choose an equivalent expression for two thirds to the fourth power times two thirds raised to the third power comma all raised to the second power.A. four ninths raised to the fourteenth powerB. four ninths raised to the twenty fourth powerC. two thirds raised to the fourteenth powerD. two thirds raised to the twenty fourth power determine the number of valence electrons in each of the following neutral atoms carbon nitrogen oxygen iodine Dr. dequincy investigates memory among adults aged 65 and older. based on the text, the most specific term for dr. dequincy's area of study is? pls help What is the sum? will mark brainiest47+ 85 05-x=13 solve for x i need help ASAP Explain why subtracting a positive number is the same as adding its inverse. she made me.........us in the party.(to dance,dance) Wei is experimenting with using gene therapy to silence cancer genes. he hopes to at some point use his discoveries to treat human patients. which model organism should wei use? I'm having trouble with picking the correct equations for this. Some ways equal 12.4 N-m, but that's wrong. 24.8 N-m is also wrong. I have 62sin60 and 62cos60, and the perpendicular should be 200mm. consider the textbooks definition of marketing. select a company that you think effectively markets its goods, services, or ideas, and describe how the firm creates, communicates, and delivers value. PLEASE HElP 25 points math Whats an example of potential energy? PLEASE HELP ILL CROWN YOUAWater behind a damBA dart stuck in a dartboardCPlants using photosynthesisDA cow chewing grass