Can anyone answer this please. All of part 2.

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Thank you​

Because of the fact that certain ions and impurities are adsorbed on the precipitate's surface. Precipitate is washed with tap water in order to eliminate these contaminants since water will wash away any pollutants that are still soluble in it.

Ions are electrically charged particles that may be produced by either taking electrons away from neutrality atoms to form positive ions or adding electrons to neutral atom to form negative ions. The quantity of protons remains constant during the creation of an ion.

Negative ions are believed to trigger biochemical processes that enhance serotonin levels once they enter our blood, which helps to reduce depression, reduce stress, and improve energy.

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The electron configuration and group number is 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10

Electron configuration is the distribution of electrons of an atom or molecule in atomic or molecular orbitals. It describes the energy levels, orbitals, and the number of electrons in each of the atom's orbitals. Electron configuration provides an understanding of the atom's structure, reactivity, and the likelihood of chemical reactions to occur. It also serves as a predictor of the atom's physical and chemical properties. Electron configuration is determined by the number of protons in the nucleus and the principal quantum number of the electron.

This is the ground-state electron configuration for the element titanium, which is located in group 4 of the periodic table.
The 1s orbital is filled with two electrons, the 2s orbital is filled with two electrons, the 2p orbital is filled with six electrons, the 3s orbital is filled with two electrons, the 3p orbital is filled with six electrons, the 4s orbital is filled with two electrons, and the 3d orbital is filled with ten electrons. This configuration of electrons corresponds with titanium's position in group 4 of the periodic table, which contains elements with four valence electrons in the outermost energy level.

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Matching each process of the nitrogen cycle with the form of nitrogen that is produced is combustion: NO2; decomposition: NH4+; nitrogen fixation: NH4+; denitrification: N2; and nitrification: NO3-.

The nitrogen cycle refers to the biogeochemical cycle by which nitrogen is converted into multiple chemical forms as it moves among terrestrial, atmospheric, and marine ecosystems. It is a repeating cycle of processes during which nitrogen circulates through both living and non-living things: the atmosphere, soil, water, plants, animals, and bacteria. In order to move through the different parts of the cycle, nitrogen must change forms. The conversion of nitrogen can be carried out through both biological and physical processes. The nitrogen converts into NO2 through stationary combustion and into NH4+ through decomposition. Fixation converts nitrogen in the atmosphere into forms that plants produce i.e., NH4+. Denitrification is the process that converts nitrate to nitrogen gas, producing N2. Nitrification is the process that converts ammonia to nitrite and then to nitrate producing NO3-.

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A resource can be classified as renewable or nonrenewable based on whether it can replace itself at the rate it is used up or whether it has a finite supply.

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Cobalt-60 is radioactive and has a half life of 5.26 years . amount of 3.60 mg sample would be left after 5.20 years is 1.82 mg.

The half-life t1/2 = 5.26 years

the decay constant , k = 0.693 / t1/2

                                      = 0.693 / 5.26

                                      = 0.1317 / year

the expression is given as :

t = 2.303 / k log No/N

No = 3.60 mg

t = 5.20 yr

5.20 = 2.303 / 0.1317 log 3.60 / N

5.20 = 17.4  log 3.60 / N

log 3.60 / N = 0.2988

3.60 / N = 1.989

N = 1.82 mg

The question is incomplete , the complete question is :

cobalt- is radioactive and has a half life of years. how much of a sample would be left after years? round your answer to significant digits. also, be sure your answer has a unit symbol.

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Answer:

Calcium Oxide must be Ionic, as we have one metal and one non metal involved. the metal is Calcium and the non metal is Oxygen. Meaning Calcium must be the one that transfers (loses) electrons to Oxygen, and Oxygen gains these electrons. It would look something like this:

Because Calcium transfers 2 electrons, it now has 2 more positively charged protons than the total number of electrons, as two electrons are lost. this means Calcium is no longer an atom, as it's positive protons and negative electrons can't cancel and make it neutral, it is now an ion, and a positively charged one at that. Same thing applies for Oxygen, but the opposite. because it has 2 more negative electrons than it's total of positive protons, it is now also an ion, and a negative one at that. The diagrams provided show the charges of the ions.

Potassium Nitrate must also be Ionic, for the same reason as before. the metal is Potassium and the non metal is Nitrogen. However, because Potassium is in Group 1, it only has 1 electron it can transfer to Nitrogen, but Nitrogen needs 2 electrons for a full outer energy level, therefore, we must have two Potassium atoms in this equation. It would look something like this:

Because there are two Potassium ions, each with a +1 charge, this means the overall charge of the Potassium ions is 2+, and this cancels out with the 2- provided by one ion of Nitrogen

The right answer to the previous question and the correct observation of a chemical property is that zinc reacts with hydrochloric acid.

ZnCl2 +H2 = Zn +2HCL

Balanced equation:  

ZnCl2 + H2 Zn + 2HCL

Zinc is a chemical element, designated by the symbol Zn and the atomic number 30. When the oxidation is removed, zinc turns shiny-greyish and at room temperature turns into a somewhat brittle metal.

All living things, including people, animals, plants, and microorganisms, depend on the trace metal zinc. It is the trace metal that is present in people in the second-highest concentration after iron. Zinc is an essential nutrient for development and a key cofactor for various enzymes. A lack of zinc can lead to a variety of diseases. Deficiency can lead to diarrhoea, infection susceptibility, and slower growth.

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Answer:

Option 3 represents correct Lewis structure for NH3

Correct task : At 25°C, only 0.0140 mol of the generic salt AB3 is soluble in 1.00 L of water. What is the Ksp of this salt at 25°C.

Solution:

When the salt dissolves, it dissociates as follows:

AB3 --> A3+ + 3B⁻

--S--------S-------3S--

The molar solubility (S) is the number of moles that can dissolve in 1 L of solution.

Molar solubility of salt is (0.0140 mol) / (1.00 L) = 0.0140 mol/L.

According to the dissociation equation:

Solubility of A3+ is 0.0140 mol/L and solubility of B⁻ is 3×0.0140 mol= 0.0420 mol/L.

[A3+] = 0.0140 mol/L.

[B⁻] = 0.0420 mol/L.

Ksp is the solubility product constant and calculated as follows:

Ksp(AB3) = [A3+] × [B⁻]3

Ksp(AB3) = [0.0140] × [0.0420]3

Ksp(AB3) = 10.37×10-7.

Ksp of this salt is 1.04×10-6.

Answer: 1.04×10-6 is the Ksp of this salt at 25°C.

The final molarity of the ammonium cation in the solution is 0.066M.

Firstly, we need to calculate the number of moles of ammonium sulfate:

No of moles = mass(g)/molar mass

No of moles = 2.57/132.14

No of moles = 0.0195 mol

When ammonium sulfate dissolves in sodium chromate, the following reaction will take place:

(NH₄)₂SO₄ + Na₂CrO₄ ------> (NH₄)₂CrO₄ + Na₂SO₄

No of Moles of sodium chromate = molarity x volume

                                                        = 66 x 0.200

No of moles of Sodium Chromate = 0.0132 mol

According to the reaction, 1 mol of sodium chromate produces 1 mol of ammonium chromate.

In this reaction, the sodium chromate amount is less than ammonium sulfate.

It can be concluded that Sodium chromate is a limiting reagent.

Therefore 0.0134 mol of ammonium cation is present in the resulting solution.

Molarity of ammonium cation = 0.0134 mol / 0.2 L

Molarity = 0.066 M

Therefore, 0.066M is the Molarity of the ammonium cation.

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At a certain temperature, the equilibrium constant for the reaction is 263.16 or 2.6*10^2 and 5.5 * 10^-8.

1. K = ( HCl )^2 / (H2)*(Cl2)

As the value of K is very less so HCl is very less amount and H2 & Cl2.

2. 2HCl = H2 + Cl2  as the reaction is reverse so equilibrium value will be inverse.

K' = 1/K

= 1/ 0.0038

= 263.16 or 2.6*10^2

3.  3H2 + 3 Cl2 = 6 HCl

Reaction is multiplied by 3 so K will be Cube

K' = K^3

= (0.0038)^3

= 5.5 * 10^-8

Equilibrium, in physics, the state of a system when neither its state of motion nor its internal energy state tend to change over time. A simple mechanical body is in equilibrium when it experiences neither linear nor angular acceleration. This state will continue indefinitely unless disturbed by an external force.

Equilibrium occurs for a single particle when the vector sum of all forces acting on the particle is zero. A rigid body (which by definition differs from a particle by its properties of extension), in addition to the states listed above for particles, is in equilibrium when the vector sum of all torques acting on the body is equal to zero, so Its state of rotational motion remains constant.

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Answer:

2Fe+2Cl2____2FeCl3

Explanation:

Fe has positive ions and hence to balance you add two ions to each side of the equation.

The time it takes for one-half of the radioactive parent isotope to decay into the daughter isotope is known as the half-life.

As a result, if we begin with 1 gram of the parent isotope, there will only be 0.5 gram of the parent isotope left after 1 half-life. The fundamental idea behind radiometric dating is that by comparing an isotope's presence in a sample to its abundance on Earth and its known half-life (rate of decay), you may determine the sample's age. A radiometric dating technique is radiocarbon dating, often known as carbon-14 dating. It determines the age of carbon-bearing by using the naturally occurring radioisotope carbon-14 (14C).

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Answer:

the ppb ratio of sulfur atoms is 1/250.

Explanation: i do math for livin cuh

A valid lewis structure of cannot be drawn without violating the octet rule is IF₃.

According to the octet rule the atoms will be more stable if the valence electrons in the valence are eight electrons.

a) NF₃ = in the lewis structure of  NF₃ the atom will contains the eight valence electrons in the valence shell. thus it follows the octet rule.

b) SO₄²⁻ =  SO₄²⁻ , lewis structure follows the octet rule . atoms contains the eight valence electrons.

c) PF₃ = phosphorus valence electrons is 5 and the fluorine valence electron is 7 and fulfil the octet rule.

d) IF₃ = in the lewis structure IF₃  , it does not follows the octet rule . it  contains the more than eight electrons .

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The correct response is A) The change in gaseous moles n g must be largest, indicating the formation of more gaseous products, which enhances unpredictability and, hence, entropy positive.

Entropy increases as a substance transitions from a solid to a liquid to a gas, and by observing the phases of the reactants and products, you can determine if an entropy change is positive or negative. Entropy will rise once the number of gas moles increases. The environment's negative entropy change is significantly outweighed by the system's positive entropy change. We can see that the system's entropy change is positive.

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The enolates are the anions from the ketones. synthesis of 2-ethyl-2-hexenoic acid from alcohols of four carbons is :

butan - 1 - ol ------>    2-ethyl-2-hexenoic acid

The enolates ions will acts as a nucleophile in the SN²  reaction . The alkyl group will replace the alpha hydrogen and then the carbon carbon new bond is formed .  synthesis of 2-ethyl-2-hexenoic acid from alcohols of four carbons is given as :

CH₃ - CH₂ - CH₂ - CH₂ - OH + PCC  --- >  CH₃ - CH₂ - CH₂ - C - H

                                                                                                  ||

                                                                                                  O

+  NaOH ---->   CH₃ - CH₂ - CH₂ - CH = C - C - H

                                                                |      ||

                                                            C₂H₅   O

+ H₂CrO₄  ----->    CH₃ - CH₂ - CH₂ - CH = C - C - OH

                                                                    |      ||

                                                               C₂H₅   O

                                          2-ethyl-2-hexenoic acid

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Answer:

the answer is 373

Explanation:

K=°C + 273

K=100+273=373

We were aware that SiO2 is a network covalent solid and that CO2 is a molecular solid, but I'm not sure how I would go about determining that.

Each silicon and carbon have the same number of valence electrons, and they both contain two oxygen atoms. Because solid sulfur dioxide is a molecule and has covalent bonds, it is not a network solid even if it is a solid and has covalent bonds. An example of a network solid is diamond. One of the many forms of elemental carbon found in nature, diamond is an allotrope of carbon. On an atomic level, it resembles this. The carbon atoms are linked together by the lines.

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True, mechanism of action that will produce diuretic effect- increase the number of particles in the tubular fluid.

When the kidneys filter too much body fluid, it is called diuresis. As a result, you produce more urine and need to use the restroom more frequently. Diuresis may be brought on by specific medical disorders or by taking drugs that boost urine production. This illness can also be caused by lifestyle choices. Water tablets or diuretics are drugs that assist the body in eliminating extra fluid. They are frequently prescribed for illnesses like high blood pressure, chronic renal disease, and heart failure.

The kidneys are told to expel more water and salt via diuretics. This lessens edema and improves blood circulation throughout the body.

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when applied research is conducted in settings outside the laboratory,  the focus on a specific real world problem can be a problem.

The configuration and contents of laboratories are determined by the diverse needs of the specialists that work inside. A laboratory might have a particle accelerator or a vacuum chamber, whereas a metallurgy lab might have tools for casting, refining, or evaluating the strength of metals. A psychologist would utilise a room with one-way mirrors and covert cameras to examine behaviour in their lab, whereas a biologist or chemist might employ a wet laboratory. In laboratories, such as those where computer scientists typically operate, computers (and occasionally supercomputers) are sometimes utilised for either simulations or data processing. Scientists in other professions will continue to use a variety of labs. In laboratories, engineers build, assemble, and test technical objects.

The complete question is:

when applied research is conducted in settings outside the laboratory, which of the following can be a problem?

a. examines the basic laws of human behavior

b. is just as likely to occur in the laboratory as in the field

c. focuses on a specific real world problem

d. has no connection with theory

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Option 1 is correct because potassium ions in argon contain 18 electrons. Thus, there are 18 isoelectronic in all that are present in Ar for K+. The electrical arrangement of these two ions is the same as that of Ar.

K+ and Cl ions are hence isoelectronic with Ar. Argon is isoelectronic with potassium ions that have a positive charge. For an ion with a -1 charge to become isoelectronic with argon, it would only have needed to gain 1 electron. Chlorine must have been present there.

Similar to the previous element, the next one can create a monovalent cation by losing one electron and isoelectronizing with argon. These include the potassium cation, K+, the chloride anion, Cl, and the sulphide anion, S2. Isoelectronic ions are said to have the same number of protons and electrons.

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The process of moving lactate from cells that are engaged in anaerobic metabolism to the liver, where it is used to deliver glucose back to the cells, is known as the Cori cycle.

It serves as an illustration of one of the vital functions of the liver in ensuring that the body has an adequate supply of glucose. Gluconeogenesis has examples like the Cori cycle. It is true that the Cori cycle uses the liver's gluconeogenesis to change the lactate that muscles create into glucose. To be utilized by other cells throughout the body, this freshly created glucose is discharged into the blood. The Cori cycle, which transforms lactic acid into Glycogen, which can be used as a source of energy, prevents the excessive accumulation of lactic acid.

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The conformation below in the dehydrohalogenation of 2-bromobutane results in the immediate production of cis-2-butene.

Dehydrohalogenation in chemistry is an elimination process that eliminates a hydrogen halide from a substrate. Although the reaction is frequently linked to the synthesis of alkenes, it has other uses as well.

A hydrogen halide is eliminated (removed) from a substrate during a dehydrohalogenation reaction. Although the reaction is frequently linked to the synthesis of alkenes, it has other uses as well.

The type of atoms or groups of atoms that leave the molecule serves as a frequent indicator of elimination reactions. Dehydrohalogenation, for instance, is the removal of a hydrogen atom along with a halogen atom; dehalogenation is the removal of two halogen atoms. Dehydration, on the other hand, is the removal of a water molecule, typically from alcohol.

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The option among the given compounds that are the same compound is: Compounds 2 and 3

Th correct option is B.

Compounds are substances that are composed of two or more elements chemically combined together.

Compounds can be formed by the combination of two non-metals or a metal and a non-metal.

Compounds formed from the combination of two non-metals are covalent compounds.

Compounds formed from the combination of a metal and a non-metal are called ionic compounds since they form oppositely-charged ions.

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Crude oil is a mixture of nitrogen, sulphur, oxygen, and volatile hydrocarbons. Methane hydrate is a particular kind of clathrate made up of water and low molecular weight gases like methane.

Fossil deposits under the seafloor are what make up oil. It is an organic chemical that was created by the deposition of organisms on the seafloor. Additionally, methane hydrates are created after marine creatures deposit. Under the ocean's surface, one can find both oil and methane hydrates.

Similarities between both the Oil and methane hydrates are :

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A molecule of water contains hydrogen and oxygen in a 1:8 ratio by mass. this is a statement of the law of constant composition. Option B.

A water molecule is composed of hydrogen atoms and oxygen atoms bonded in a 2:1 ratio. Due to their fixed mass ratios, water molecules obey the law of constant proportions. Another example of a compound that obeys the law of constant ratios is methane.

To illustrate this, consider the production of water from molecular oxygen and hydrogen. Therefore mass is conserved. Conservation of mass can be used in chemical calculations. The law of conservation of mass states that matter cannot be created or destroyed.

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The structural formulas for the product formed by treating each compound with propyl magnesium bromide followed by aqueous HCl is given as follows :

                 CH₃CH₂CH₂ - CH₂ - OH

                          butanol

The propyl magnesium bromide , the formula is given as follows :

  CH₃CH₂CH₂ -MgBr

when it react with compound CH₂O , the product formed is the butan - 1 - ol. the structural formula is given as follows :

     CH₃CH₂CH₂ - CH₂ - OH

                          butanol

The propyl magnesium bromide is acts as grinard reagent which react with CH₂O and will form the alcohol, that butanol. here the  CH₂O is called as the formaldehyde.

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Benzene is a carbon and hydrogen compound with aromatic properties. The chemical formula for benzoene is C6H6.To determine the number of sigma bonds in this, we can create the skeletal structure using only sigma bond representations.

Let's show the structure of benzene.

As can be seen, there are six C-H bonds and six C-C bonds.

We may therefore say that benzene has a total of 12 sigma bonds in it.

When we look at the structure of benzene, we can see that it has three C=C bonds.

There are consequently 3 pi bonds and 12 sigma bonds. As a result, benzene contains 15 covalent bonds.

Since benzene has 12 and 3 sigma and pi bonds, respectively, the correct answer is that it does.

Additional

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The arrows are used to illustrate the flow of electrons. follow the arrows to predict the intermediate and product of reaction , the product is :

CH₃ - C -CH₃  + H₂O  +  ⁻OCH₃

          ||

          O

The reaction is in between the 2 methoxypropan-2-ol and the hydroxide ion. the OH⁻ ion is the strong nucleophile and contain the negative charged. the hydroxyl group acts as a proton of the compound is acidic because of the electronegativity difference. the hydroxyl ion takes protons and form the water.

The reaction is given as follows :

         OH

          |

CH₃ - C - OCH₃   + OH⁻  ---->  CH₃ - C -CH₃  + H₂O  +  ⁻OCH₃

           |                                       ||

          CH₃                                  O

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