write the electron configuration of an atom of the element highlighted in this outline of the periodic table: hint: you do not need to know the name or symbol of the highlighted element!

Makes the eluent more polar is the correct option.this is the purpose which is most used for TLC method.TLC means thin-layer chromatography.

Non-volatile mixtures can be separated using the chromatography technique known as thin-layer chromatography (TLC). A sheet of an inert substrate, such as glass, plastic, or aluminum foil, is used for thin-layer chromatography. This substrate is covered with a thin layer of an adsorbent material, often silica gel, aluminum oxide (alumina), or cellulose. To elute more strongly retained solutes, an increase in eluent strength is necessary. RP-HPLC (raise organic, create more non-polar) (increase organic, make more non-polar). NP-HPLC (increase solvent to make more polar) (increase solvent to make more polar) For many separations, eluent strength gradients (gradual changes) are utilized. When polar compounds are induced to be more attracted to the mobile phase by a moderately polar eluent, the equilibrium shifts and the compound spends more time in the mobile phase, increasing the R f.

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a. dinitrogen oxide (N2O)

O=16.00g

N=14.00g * 2 = 28.00g

So NO2 = 44.00g

You have 100g of NO2, you need moles.

So:

100g of NO2 x 1 mol NO2/44g of NO2 = your answer

b. All right. So let's go ahead and convert our 100 grams of stuff. Two moles. So starting with, we have 100 grams, uh, and 20 times we know we're gonna have one more on the top. We need the molar mass. So if we look at our periodic table, nitrogen has a molar mass of 14 point. Oh, sevens will multiply that by two. Since we have two nitrogen in our compound plus 15.999 your period table might be slightly different. That's okay. Just stay consistent with your numbers. If we add those together, we should get 44 point no. 13 grams for everyone. Mole. That's why it's ah conversion factor of the inner calculator and get 2.27 moles into right. And then, um, we have 100 grams of other substance teach your each times we know our one mole from the conversion factor will be on the tops. Wouldn't do that now and then. Carbon 12.1 Um, options. 15.99 and then hydrogen is one point 08 So I had all those together multiply by our sub scripts and get 32 point go for two calculate. That would be 3.12 moles of C H 30 H for the same mass. What this means is that CH. 30 H husband It contains more moles than in 20

The substance whose Lewis structure shows three covalent bonds is Nitrogen gas molecule.

Lewis structure is a dot structure which gives idea about the number of valence electrons that are involved in the bonding within the molecule.

Lewis dot structure of nitrogen gas will be expressed as in the attached image, where between two nitrogen atoms triple bond is present. That triple bond is formed by the sharing of electrons and known as covalent bonds.

Hence in nitrogen gas molecule three covalent bonds is present.

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C. Evaluating the results.

Explanation:

I hope it'll help you...

The equilibrium concentration of SCN V is 0.000398 M.

The first step is to use the Beer-Lambert Law to calculate the concentration of FeSCN2+ in the standard solution:

A = εbc

We know that the absorbance of the standard solution is 0.510, and we can look up the molar absorptivity constant for FeSCN2+ at the wavelength being used in the experiment. Let's assume it is 5000 M^-1cm^-1. We also know the volume of the standard solution and the concentration of Fe(NO3) and KSCN used to prepare it:

Volume of Fe(NO3) = 9.00 mL = 0.00900 L

Concentration of Fe(NO3) = 0.200 M

Volume of KSCN = 1.00 mL = 0.00100 L

Concentration of KSCN = 0.0020 M

To calculate the concentration of FeSCN2+ in the standard solution, we need to use the equation:

Fe(NO3) + KSCN ⇌ FeSCN2+ + KNO3

Initially, before any reaction occurs, the concentration of FeSCN2+ is zero. At equilibrium, the concentration of FeSCN2+ is the same as the concentration of SCN V, because all of the Fe(NO3) and KSCN react to form FeSCN2+. Therefore, we can set the equilibrium concentration of FeSCN2+ equal to x, and the equilibrium concentration of SCN V to (0.00050 - x), since the initial concentration of SCN V was 0.00050 M.

Using the equilibrium concentrations of FeSCN2+ and SCN V, we can write the equilibrium expression:

Kc = [FeSCN2+] / ([Fe(NO3)] [KSCN])

Substituting the equilibrium concentrations and the initial concentrations, we get:

Kc = x / (0.200 - x) (0.0020 - x)

We can solve for x by using the given absorbance of the trial:

Atrial = εbc [FeSCN2+]trial

0.250 = 5000 M^-1cm^-1 (1 cm) [FeSCN2+]trial

[FeSCN2+]trial = 0.000050 M

Now we can use the equation for Kc and the value of [FeSCN2+]trial to solve for x:

0.510 = 5000 M^-1cm^-1 (1 cm) x

x = 0.000102 M

Finally, we can calculate the equilibrium concentration of SCN V:

[SCN V]eq = 0.00050 - x

[SCN V]eq = 0.00050 - 0.000102

[SCN V]eq = 0.000398 M

Therefore, the equilibrium concentration of SCN V is 0.000398 M.

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Answer:

Answer:

metals can react with acid, water and oxygen

When fossil fuels are mined and used for energy, carbon dioxide gas combines with them to form an essential heat-trapping gas known as a greenhouse gas.

The correct answer is D

Many health impacts from CO2 exposure may occur. These symptoms could include a coma, hypoxia, convulsions, sweating, disorientation, agitation, a tingling or pins-and-needles sensation, difficulty breathing, fatigue, increased heart rate, and high blood pressure.

As a significant greenhouse gas, carbon dioxide aids in keeping heat in the atmosphere. Our earth would be icy and inhospitable without it. But as CO2 levels grow in the atmosphere, average global temperatures rise as well, affecting other facets of Earth's climate.

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Answer:

yes, they are ph sensitive

Explanation:

Plants and animals are known to show growth sensitive to pH. pH is known as the hydrogen ion concentration of a solution. For example, plants are known to be growth sensitive to the pH of the soil. Plants need an optimum pH of soil for their growth, hence, showing growth dependence on soil pH.

The pOH of the solution is 0.63. the concentration of hydroxide ions in moles per liter.

To find the pOH in a 0.235 M NaOH solution, we need to use the equation :pOH = -log[OH-]where [OH-] represents the concentration of hydroxide ions in moles per liter (M).Step-by-step solution:To start, we need to determine the concentration of hydroxide ions [OH-] in the solution. The chemical formula for sodium hydroxide is NaOH. When dissolved in water, it dissociates into Na+ ions and OH- ions, as shown below: NaOH → Na+ + OH-This means that the concentration of hydroxide ions in the solution is the same as the concentration of sodium hydroxide, which is 0.235 M.So, [OH-] = 0.235 MNow we can use this value to calculate the pOH:pOH = -log[OH-]pOH = -log(0.235)pOH = 0.628. When rounded to two decimal places, the pOH of the solution is 0.63.So, the correct answer is option b) 0.63. We can write a 150 word answer as follows: A pH scale measures the concentration of hydrogen ions (H+) in a solution. The pOH is a measure of the concentration of hydroxide ions (OH-) in a solution. To calculate the pOH of a 0.235 M NaOH solution, we first need to determine the concentration of hydroxide ions. When sodium hydroxide (NaOH) is dissolved in water, it dissociates into Na+ ions and OH- ions. This means that the concentration of hydroxide ions in the solution is the same as the concentration of sodium hydroxide, which is 0.235 M. Using the formula pOH = -log[OH-], we can find that the pOH of the solution is 0.63. This means that the concentration of hydroxide ions in the solution is 10^-0.63 M, or approximately 0.199 M.

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When NH₃(g) is bubbled into water, NH₄⁺ and OH⁻ ions are present at the greatest concentration besides water molecules.

When NH₃ gas is bubbled into water, it forms ammonium ions (NH₄⁺) and hydroxide ions (OH⁻) through a process called hydrolysis. The hydrolysis reaction of ammonia with water is NH₃ + H2O ⇌ NH₄⁺ + OH⁻. The ammonium ion is formed when a hydrogen ion (H⁺) from water combines with ammonia, and the hydroxide ion is formed when the remaining OH⁻ from water is left over.

The concentration of ammonium ions and hydroxide ions will increase with the amount of ammonia gas bubbled into water. Therefore, besides water molecules, ammonium ions and hydroxide ions are present at the greatest concentration when NH₃ is bubbled into water.

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Answer:

6.31x10^-10

Explanation:

Answer: 6.31 x 10^-10

Explanation:

Answer:

awawaw

Explanation:

The elements of group IA have been termed alkali metals because of their oxides and hydroxides form alkaline.

An element can be defined as a substance which cannot be split into simpler units by ordinary chemical process

Below are some examples of elements:

Alkali metals refers to any of the soft, light, reactive metals of Group 1 of the periodic table.

Periodic table refers to a tabular chart of the chemical elements according to their atomic numbers so that elements with similar properties are in the same column.

So therefore, the elements of group IA have been termed alkali metals because of their oxides and hydroxides form alkaline.

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In the given reaction, we have two reactants, CH₃COO⁻ (acetate ion) and O₂S(OCH₃)₂ (dimethyl sulfate). CH₃COO⁻ (acetate ion) is a nucleophile and O₂S(OCH₃)₂ (dimethyl sulfate) is an electrophile.

To determine whether each reactant acts as a nucleophile or an electrophile, we need to consider their reactivity and electron density.

The acetate ion (CH₃COO⁻) is a nucleophile because it has a lone pair of electrons on the oxygen atom, which it can donate to form a new bond. Nucleophiles are electron-rich species that seek electron-deficient sites.

On the other hand, dimethyl sulfate (O₂S(OCH₃)₂) is an electrophile. The sulfate group (OSO₃) is highly electron-withdrawing, making the sulfur atom electron-deficient and susceptible to attack by nucleophiles. Electrophiles are electron-deficient species that can accept a pair of electrons to form a new bond.

In the reaction, the acetate ion acts as a nucleophile by attacking the electrophilic sulfur atom in dimethyl sulfate. This leads to the formation of a new bond and the subsequent products: CH₃COOCH₃ (methyl acetate) and CH₃OSO₃ (methyl sulfate).

Therefore, in the given reaction, CH₃COO⁻ (acetate ion) is a nucleophile and O₂S(OCH₃)₂ (dimethyl sulfate) is an electrophile.

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The complete question is:

Label each reactant as a nucleophile or an electrophile in the reaction below. CH₃COO⁻ + O₂S(OCH₃)₂ → CH₃COOCH₃ + CH₃OSO₃.

Answer:

gas production

Explanation:

Answer:

gas formation

Explanation:

frothy bubbles produced by carbon dioxide gas are a sign that a chemical reaction has occurred when a based is mix with acid.

Answer:

Under the same conditions and assuming ideal gas behavior, both gases should have the same number of moles. This means the higher the molar mass the denser the gas. Water vapor would be less dense than N2 under the same conditions.

Explanation:

Answer:

Mass = 40 g

Explanation:

Given data:

Mass of oxygen needed = ?

Mass of propane = 11 g

Solution:

Chemical equation:

C₃H₈ +5O₂   →     3CO₂ + 4H₂O

Number of moles of propane:

Number of moles = mass/molar mass

Number of moles = 11 g/ 44.1 g/mol

Number of moles = 0.25 mol

now we will compare the moles of propane and oxygen.

              C₃H₈        :          O₂

                  1           :            5

                0.25      :            5/1×0.25 = 1.25 mol

Mass of oxygen needed:

Mass = number of moles × molar mass

Mass = 1.25 mol × 32 g/mol

Mass = 40 g

An accurate step in the procedure to name a binary molecular compound using IUPAC nomenclature rules is to; End the name of the second element with the suffix-ided.

What is IUPAC ?

The International Union of Pure and Applied Chemistry is reffered as IUPAC. It is a global scientific organization that establishes guidelines for chemical nomenclature, terminology, measurements, and symbols. IUPAC also publishes international recommendations for chemical safety and environmental protection and provides guidance on the use and application of chemical research.

What does Binary means?

Binary is a base-two number counting, calculating, and representation system. This means that, unlike the decimal system (base 10), which counts in tens, binary counts in powers of two. Binary numbers are made up of only two digits, 0 and 1, and each digit is known as a "bit." Binary is used to represent data and perform calculations in computing and electronic systems.

Therefore the correct option is C. End the name of the second element with the suffix-ided.

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Answer:

100,000 N

Explanation:

Force, F = mass, m × acceleration, a

⇒F = ma

m= 20, 000kg

a = 5m/s²

∴ F = 5 × 20,000 = 100,000N

Answer:

Gin= Machine that picks cotton

Explanation:

This Machine was used in the early 1940s to help pick cotton to make things.

Answer: B) Sperm

Explanation:  For lazy gang wya Lol

To find the pH of a solution that is 0.032 M in NaClO, we need to consider the hydrolysis of the NaClO salt. NaClO dissociates in water to produce Na+ and ClO-. The ClO- ion can react with water and act as a weak base, leading to the generation of OH- ions.

The balanced equation for the hydrolysis reaction is:

ClO- + H2O ⟶ HClO + OH-

Since HClO is a weak acid, it will only partially dissociate, while the ClO- ion will react with water to produce OH- ions. This results in an increase in the concentration of OH- ions in the solution. To calculate the pH, we need to determine the concentration of OH- ions. Since NaClO is a 1:1 electrolyte, the concentration of OH- ions will be equal to the concentration of ClO- ions, which is 0.032 M.

Using the equation for the autoionization of water: Kw = [H+][OH-], we can calculate the concentration of H+ ions:

Kw = [H+][OH-] = 1.0 × 10^-14 (at 25 °C) [H+] = Kw / [OH-] = (1.0 × 10^-14) / (0.032) = 3.125 × 10^-13 M

To calculate the pH, we take the negative logarithm (base 10) of the H+ concentration: pH = -log[H+] = -log(3.125 × 10^-13) ≈ 12.505 Therefore, the pH of the solution that is 0.032 M in NaClO at 25 °C is approximately 12.505.

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Answer:

the combustion of fossil fuels, such as coal, oil, and natural gas, to produce electricity.

Therefore, the formal charge for each atom in nitrobenzene is: C: 0, N: 0, O: -1

The structure of nitrobenzene is:

   NO2

         |

____C____

       | |

   H C6H5

        |

        H

To determine the formal charge (FC) of each atom, we need to compare the number of valence electrons in the neutral atom to the number of electrons assigned to the atom in the molecule.

The FC of an atom is calculated using the formula:

FC = valence electrons - lone pair electrons - 1/2(bonding electrons)

Valence electrons for carbon (C) = 4

Valence electrons for nitrogen (N) = 5

Valence electrons for oxygen (O) = 6

FC for C = 4 - 0 - 1/2(8) = 0

FC for N = 5 - 2 - 1/2(6) = 0

FC for O = 6 - 4 - 1/2(4) = -1

An atom that is likely to be attracted to an anion is one that has a positive formal charge or is electron deficient. In nitrobenzene, the carbon atom is least electronegative and has a formal charge of 0, so it is more likely to be attracted to an anion.

An atom that is likely to be attracted to a cation is one that has a negative formal charge or is electron rich. In nitrobenzene, the oxygen atom has a formal charge of -1 and is therefore more likely to be attracted to a cation.

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Answer:

16.848L of NaOH

Explanation:

Using C1V1=C2V2

Dot structures represent the valence electrons of each atom, where each dot represents a single valence electron. In the case of hydrogen and oxygen, each atom has one valence electron, while carbon has four valence electrons.

What is valence electron?

A valence electron is an outer shell electron that is associated with an atom and that can participate in the formation of a chemical bond with another atom. In other words, it is an electron that is located in the outermost shell of an atom and is available to be shared or transferred in the formation of chemical bonds with other atoms. The number of valence electrons an atom has determines its reactivity and ability to form chemical bonds with other atoms.

Formaldehyde has the chemical formula \(CH_{2}O\), which means it has one carbon atom (C), two hydrogen atoms (H), and one oxygen atom (O).

It is a colorless gas with a pungent odor and is widely used in the manufacture of various chemicals and products, including plastics, textiles, and household cleaners.

Dot structure:

H: • H

O: • O •

C: • C •

These dot structures represent the valence electrons of each atom, where each dot represents a single valence electron. In the case of hydrogen and oxygen, each atom has one valence electron, while carbon has four valence electrons. The dot structure for formaldehyde would show the bonding between the atoms as well, with the carbon atom sharing electrons with the oxygen and hydrogen atoms to form covalent bonds.

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