The single most important factor influencing potassium ion secretion is ________

Answer:

It is negative because the enthalpy of the products is greater than the enthalpy of the reactants.

The new concentration of the KCl solution after mixing 1 L new volume is 0.28 M.

Concentration in terms of molarity will be calculated by using the below equation as:

M₁V₁ = M₂V₂, where

M₁ = molarity of old KCl solution = 1.6 M

V₁ = volume of old KCl solution = 175 mL = 0.175 L

M₂ = molarity of new KCl solution = ?

V₂ = volume of new KCl solution = 1 L

On putting all these values on the above equation, we get

M₂ = (1.6)(0.175) / (1) = 0.28 M

Hence resultant concentration is 0.28 M.

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Answer:

- Deep red fire is about 600-800° Celsius

- Answer: {1102.91}

Given: K= °C + 273.15

K = 1,376.06

Since you’re trying to find C (Celsius) you want to get C by itself in the problem. So you subtract 273.15 from that side. Anything you do to one side of the equal sign you have to do to the other side, so also subtract 273.15 from K (1,376.06).

1,376.06 - 273.15 = {1102.91°C}

Answer:

994.56

Explanation:

41.44 multiplied by 4, that gives us a month.

Then multiply by 6.

For a comparison of the nucleus 5626fe, the density of the nucleus 112 48cd is mathematically given as the same.

n(Cd) / n(Fe)=1

Generally, the equation for the density  is mathematically given as

d=\frac{A}{4/3}\piR^3

Therefore

n(Cd) / n(Fe) = [A (Cd) / (A Fe) ] * [ R (Fe) / R (Cd)]^3

n(Cd) / n(Fe)= (112 / 56 ) * (1/1.26)3

n(Cd) / n(Fe)=1

In conclusion, The ratio of n(Cd) = n(Fe) is 1, hence same

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Compared to the nucleus ⁵⁶₂₆Fe, the density of the nucleus ¹¹²₄₈Cd is same.

Density of any nucleus will be calculated by using the below equation as:

ρ = m/V, where

m = mass of the atom

V = volume = 4/3πR³

For the given question calculation will be proceed as:

n(Cd) / n(Fe) = [m(Cd)/m(Fe)].[R(Fe)/R(Cd)]³

From the given formulas of iron and cadmuim we put values on the above equation then we get,

n(Cd) / n(Fe) = (112 / 56 ) × (1/1.26)3

n(Cd) / n(Fe) = 1

Hence the density of nucleus ¹¹²₄₈Cd is same as of nucleus ⁵⁶₂₆Fe nucleus.

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This is because amino group of p-aminobenzoic acid is an aniline and is less electrophilic than an alkyl amine.

This is an aromatic amine which consists of a phenyl group attached to an amino group.

The amino group of p-aminobenzoic acid being an aniline makes it less electrophilic which is why an alkyl amine participates in the reaction instead.

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The amino group of p-aminobenzoic acid does not participate in the reaction as this is an aniline and is less electrophilic than an alkyl amine.

Aniline is an aromatic amine molecule in which phenyl group is attached with an amino group.

The amino group present in the p-aminobenzoic acid behave as an aniline as a result of which it becomes less electrophilic in nature and this is the reason why an alkyl amine participates in the reaction instead of the p-aminobenzoic acid.

Hence amino group of p-aminobenzoic acid is less electrophilic in nature and that's why not participate in the reaction.

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Answer:

The closest noble gas to silicon is Neon (Ne)

Explanation:

Electron configuration is the distribution of the electrons in atomic and molecular orbitals. The electron configuration of silicon is [Ne] 3s² 3p².

An electron configuration is the allocation of the sub-atomic particle, an electron in the orbits of the atom or the molecules. It represents the distribution of electrons around the nucleus.

The general electron configuration of silicon with atomic number 14 is [tex]\rm 1s^{2}2s^{2}2p^{6}3s^{2}3p^{2}.[/tex] The noble gas closest to silicon is neon and can be written as, [tex]\rm [Ne] 3s^{2}3p^{2}.[/tex]

Therefore, the electron configuration of silicon is [tex]\rm [Ne] 3s^{2}3p^{2}.[/tex]

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Mark the lime poor conducter of heat and electricity.

Yes why no ,Xenon is already has its secured place in modern periodic table.

Xenon is a non-reactive gas. It will not conduct and react normally. Thus it can be classified as a non-metal. Xenon is placed in the inert gas or noble gas group that is group 18.

Noble gases are inert gases in the 18th group of periodic table. Noble gases have completely filled orbitals and thus they no need other electrons.

Atoms participate in reaction when they are not stable because of the insufficient valence electrons. Noble gases such as argon, krypton, neon, xenon etc. have 8 valence electrons and thus are not reactive.

Metals are highly conductive and they are placed in the left side of periodic table. In periodic table, from left to right the metallic nature decreases and the other elements are called non-metals. Most of the non-metals are gases and very few such as silicon is metalloid.

Non-metals are insulators or poorly conduct electricity. Hence, xenon is a non-metal placed in the 18th group of periodic table.

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Answer:

option C is the correct answer

Explanation:

it belongs to alkanes series

for alkane series the formula is

C n H 2n+2

so the formula of b utane is

C 4 H 10

The correct answer is option C.C4H10

These isomers occur because they can branch off at the carbon chain. For example, butane has two isomers, C4H10. One of them has a "linear" carbon atom and the other has a branched chain.

Butane is a 4-carbon alkane, so its molecular formula is C4H10. There are two isomers. n-Butane and isobutane. Here, n-butane is a linear compound with four carbon atoms connected by a single covalent bond.

\Compounds with the same molecular formula but different arrangements of carbon atoms in the straight or branched chain are called chain isomers. n-Butane and isobutane are chain isomers because they have different carbon atom arrangements

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The pincushion moss, the echeveria, and the moon cactus in a terrarium make up a community.

A community of organisms refers to a group of organisms of different species which are found living together in the same habitat.

Populations of organisms of different species within the same habitat constitute a community.

The pincushion moss, the echeveria, and the moon cactus are all different species found within the same habitat, a terrarium.

Therefore, the different species of organisms in the terrarium make up a community.

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Answer: part of a community and part of an ecosystem  

Explanation:

Answer:

6 moles of oxygen is required to burn 1 mole of C4H8 completely

Explanation:

reaction is C4H8 + (6)O2 ------ (4)CO2+ (4)H2O

Answer:

The answer is Ka1

▬▬▬▬▬▬▬▬

When it comes to dissociation, Ka1 is fairly the most even-out level, classifying it as a Weak Acid.

They must be fully separable into ions. If that's the case, you are dealing with a Strong acid.

If this is not the case, that would make the acid Weak.

▬▬▬▬▬▬▬▬

In conclusion, I hope this helps you and I hope you have a great day!

The hydrogen ion concentration [H3O+] in an egg white containing 6.3 × 10-⁷M of [OH-] is 1.5 × 10-⁸M.

The hydrogen ion concentration of a solution can be calculated as follows:

pOH = - log [OH-]

pOH = - log [6.3 × 10-⁷M]

pOH = - [-6.2]

pOH = 6.2

Since pOH + pH = 14

pH = 14 - 6.2

pH = 7.8

pH = - log [H3O+]

7.8 = - log [H3O+]

[H3O+] = 10-⁷:⁸

[H3O+] = 1.5 × 10-⁸M

Therefore, the hydrogen ion concentration [H3O+] in an egg white containing 6.3 × 10-⁷M of [OH-] is 1.5 × 10-⁸M.

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The percent composition of hydrogen is 18.3%.

What is percent composition?

The term percent composition refers to the percentage of a particular component in a compound. It is contained as the ratio of the mass of that component to the total mass multiplied by 100.

From the law of conservation of mass, total  mass of beryllium hydride(BeH2) =  85.2 g

Mass of hydrogen =  15.6 g

Percent composition of hydrogen =  15.6 g/ 85.2 g  × 100/1 = 18.3%

the answer is 534.54 kelvin

Answer:

Photosynthesis is the process by which carbon dioxide and water are converted into oxygen and glucose. The plant consumes glucose as food, and oxygen is produced as a by-product. During cellular respiration, oxygen and glucose are converted to water and carbon dioxide. Water and carbon dioxide are by-products of the process, while ATP is the energy that is transformed. Water, carbon dioxide, and energy in the form of sunshine are all inputs in photosynthesis, and the outputs are glucose and oxygen.

Answer:

photosynthesis takes carbon dioxide from our atmosphere and turns it into oxygen.  A plant requires sunlight, water, and carbon dioxide to make both sugar and oxygen. . Input:  For photosynthesis to take place, water from the roots, carbon dioxide from the air, and energy from the sunlight are needed. Output: Photosynthesis creates glucose (sugar) used for/stored as food and releases oxygen into the air.

Explanation:

Species that have a lone pair of electrons often donate electrons by resonance while substituents that are electron deficient take away electrons by resonance.

The term resonace has to do with the movement of electron pairs in a molecule. Inductive effects has to do with the drawing of electron density towards an atom or bond.

The two effects depends on the nature of a substituent. For instance, species that have a lone pair of electrons often donate electrons by resonance while substituents that are electron deficient take away electrons by resonance.

The question is incomplete hence the exact nature of the substituents can not be determined.

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In resonance, the species with lone pairs donate electrons while the substituent takes electrons away from another species when deficient by resonance.

When the electron donor or the withdrawal groups creates the electron density on the molecule then it is called the inductive effect. This results in the creation of permanent dipoles in the bonds of the molecules.

Atom attached to a benzene molecule with higher electronegativity than hydrogen atom then, it will be an acceptor while with lower electronegativity will be a donor.

The movement of the electron pair like lone pair and pi bond in a molecule by the delocalization is called the resonance effect. The electron donation and acceptance depend on the nature of the substituent molecule.

If the atom attached to the benzene molecule is electron-rich, it will be a donor, while the electron-deficient will accept the electron by the method of resonance effect.

Therefore, the nature of the substituent determines the resonance and the inductive effect.

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Explanation:

please mark me as brainlest

Answer:

This study is an overview of previous studies on lime (quick and hydrated) -treated soil. Lime is the oldest traditional stabilizer used for soil stabilization. The mechanism of soil-lime treatment involves cation exchange, which leads to the flocculation and agglomeration of soil particles. The high pH environment then causes a pozzolanic reaction between the free Ca+2 cations and the dissolved silica and alumina. Lime-treated soil effectively increases the strength, durability and workability of the soil. Such treatment also improves soil compressibility. A fluctuation behavior was observed on the influence of lime on soil permeability. However, the factors affecting the permeability of the soil-lime mixture should be extensively studied. Nonetheless, lime treatment has a number of inherent disadvantages, such as carbonation, sulfate attack and environment impact. Magnesium oxide/hydroxide are thus proposed as a suitable alternative stabilizer to overcome at least some of the disadvantages of using lime in soil stabilization.

Explanation:

Actually I have a pdf on it to explain more if you want but how to get it to you is the issue. well I'm guessing the one I've put out should be very much okay, I hope so .

Answer:

Explanation:

The relation between molecular (formula) mass and molar mass page 44 . To obtain one mole of copper atoms (6.20 x 1023 ne atoms) weigh out 63.55 g copper. The molar mass (M) of a substance is the mass of one mole of entities (atoms, molecules, or formula units) of the substance.

Assuming an ebullioscopic constant of 0.512 °C/m for the water, If you add 30.0g of salt to 3.75kg of water, the boiling-point elevation will be 0.140 °C and the boiling-point of the solution will be 100.14 °C.

Boiling-point elevation describes the phenomenon that the boiling point of a liquid will be higher when another compound is added, meaning that a solution has a higher boiling point than a pure solvent.

We will use the definition of molality.

b = mass solute / molar mass solute × kg solvent

b = 30.0 g / (58.44 g/mol) × 3.75 kg = 0.137 m

We will use the following expression.

ΔT = Kb × m × i

ΔT = 0.512 °C/m × 0.137 m × 2 = 0.140 °C

where

The normal boiling-point for water is 100 °C. The boiling-point of the solution will be:

100 °C + 0.140 °C = 100.14 °C

Assuming an ebullioscopic constant of 0.512 °C/m for the water, If you add 30.0g of salt to 3.75kg of water, the boiling-point elevation will be 0.140 °C and the boiling-point of the solution will be 100.14 °C.

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Answer:

1.50 moles

Balanced equation:  2Fe + 3Cl₂ --> 2FeCl₃

find moles of iron:

moles = mass/Mr

moles = 55.8/56

moles = 0.9964 moles

use molar ratio:

2Fe : 3Cl₂

2 : 3

moles of Cl₂ = (0.9964/2)*3 = 1.50 moles

Answer:

Melamine

Explanation:

Answer:

sulphuric acid and nitric acid

Explanation:

The acids that should be stored in plastic containers rather than in glass ones are hydrofluoric acid, phosphoric acid, sulfuric acid, etc.

Acids are those solutions that are sour in taste and have lower pH to 7.

Hydrofluoric acid is highly corrosive, made up of hydrogen and fluorine.

Phosphoric acid is an important oxygen of phosphorus.

Thus, the acids that should be stored in plastic containers rather than in glass ones are hydrofluoric acid, phosphoric acid, sulfuric acid, etc.

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Answer:

Silk! All the others were inventions of the Han period.

Explanation:

Silk fabric was invented in Ancient China. Legend has it that the process for making silk cloth was first invented by the wife of the Yellow Emperor, Leizu, around the year 2696 BC.

- profparis

Answer:

a solution with high amount of hydrogen ions is called an acidic solution

Gas law gives the relation between the volume, moles, pressure, and temperature of the gas. The air pressure at the top of the mountain is 0.945 atm.

Gas law gives the direct relationship between the pressure and the volume of the gas with that of the temperature of the gas.

Given,

Initial pressure = 1.0 atm

Initial volume = 0.985 L

Initial temperature = 298.15 K

Final pressure = ?

Final volume = 1.030 L

Final temperature = 295.15 K

The final pressure at the mountain top is calculated as:

[tex]\begin{aligned} \rm \dfrac{P_{1}V_{1}}{T_{1}} &= \rm \dfrac{P_{2}V_{2}}{T_{2}}\\\\\dfrac{1 \;\rm atm \times 0.985 \;\rm L}{ 298.15 \;\rm K} &= \;\rm \dfrac{P_{2} \times 1.030 \;\rm L}{295.15\;\rm K}\\\\&= 0.945 \;\rm atm\end{aligned}[/tex]

Therefore, the pressure on the top of the mountain is 0.945 atm.

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The moles of water are contained in the given sample is 1 mole.

Moles of any substance will be calculated by using the below formula:

n = W/M , where

W = required mass

M = molar mass

Given molar mass of H₂O = 18.0 g/mol

Given mass of H₂O = 18.0 g

Moles of H₂O = 18.0 g / 18.0 g/mol = 1 moles

Hence option (1) is correct.

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Answer:

A. 1.00 Mole

Explanation:

edg 2023

Answer: test two

Explanation: it sits in between both