At a constant pressure, a sample of gas occupies 420ml at 210k. what volume does the gas occupy at 250k

Answer:

Solid, Naturally Occurring, Inorganic, Fixed Composition, Crystal-like internal structure

Explanation:

The correct order of reactivity towards electrophilic aromatic substitution is:

b.) Phenol > benzene > chlorobenzene > benzoic acid

Phenol is more reactive than benzene towards electrophilic substitution reactions due to the presence of the -OH group (hydroxyl group) attached to the benzene ring. The lone pair of electrons on the oxygen atom in the -OH group can donate electron density to the ring, making it more nucleophilic and facilitating electrophilic attack.

Benzene, although less reactive than phenol, can still undergo electrophilic substitution reactions due to its aromaticity and delocalized electron system.

Chlorobenzene is less reactive than both phenol and benzene because the chlorine atom is an electron-withdrawing group. It withdraws electron density from the benzene ring, making it less nucleophilic and less prone to electrophilic substitution.

Benzoic acid is the least reactive among the options given. The carboxylic acid group (-COOH) is an even stronger electron-withdrawing group than the chlorine atom in chlorobenzene. It further reduces the electron density on the benzene ring, decreasing its reactivity towards electrophilic substitution.

Therefore, the correct order of reactivity towards electrophilic substitution is option b.

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the complete question is:

The correct order of reactivity towards electrophilic aromatic substitution is?

a.) Benzene > phenol > benzoic acid > chlorobenzene

b.) Phenol > benzene > chlorobenzene > benzoic acid

c.) Chlorobenzene > benzoic acid > phenol > benzene

d.) Benzoic acid > chlorobenzene > benzene > phenol

Answer:

freckles.........

You can inherit freckles from your family but you cant inherit hair length, physical fitness, or scars due to the fact you can cut your hair any length.You can gain scars from any wound. whereas Physical fitness comes from how healthy you are to perform aspects of sports, occupations and daily activities.  

Answer:

Freckles

Explanation:

Because everything else is specific to a person. And these things are ones own personality and not born with.

A chemical reaction is in dynamic equilibrium when the rate of the forward reaction is equal to the rate of the reverse reaction.

The  correct answer is 2.0 mol/L·s .

The concentrations of the reactants and products in the equilibrium state are known as the equilibrium concentrations. The rate of the forward and backward reaction in equilibrium state is equal; there is no net change in the quantity of reactants or products present in the equilibrium state. However, the reaction continues. In other words, the chemical reaction is still active; however, the quantity of the product and reactant stays the same at equilibrium.

In dynamic equilibrium, the rate of forward reaction is equal to the rate of the backward reaction. The chemical reaction is still active, but the concentration of the products and reactants remain the same. The balanced chemical reaction can be represented as follows: A ⇋ BThe above chemical reaction can be in a state of dynamic equilibrium when the rate of the forward reaction is equal to the rate of the backward reaction.

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The empirical formula of the compound with the molecular formula C6H12 is CH2

To determine the empirical formula of a compound with a molecular formula, you need to divide the subscripts by their greatest common factor (GCF).

To find the empirical formula of a compound with the molecular formula c6h12, divide the subscripts by their greatest common factor:

6 and 12 have a common factor of 6.

Divide each subscript by 6 to get the empirical formula:

C1H2

Therefore, the empirical formula of the compound with the molecular formula C6H12 is CH2.

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Answer:

Another method tested in study to produce sodium polyacrylate as an alternative to current methods began with Butyl acrylate acrylic acid copolymer and poly(butyl acrylate)

Explanation:

They were synthesized via suspension polymerization by using butyl acrylate as the main monomer and acrylic acid as the secondary monomer

I suggest you get more info from wikipedia cause it helped me alot

The monomers used to make sodium polyacrylate polymer chains acrylic acid (H₂C=CHCOOH) and its sodium salt (H₂C=CHCOONa) .

Monomers are small organic molecules that have the capability to bond to form larger molecules known as polymers.

The reaction between acrylic acid (H₂C=CHCOOH) and its sodium salt (H₂C=CHCOONa) produces sodium polyacrylate.

A long-chain copolymer made up of alternate units of acrylic acid and sodium acrylate is the result of this process.

Acrylic acid and sodium acrylate form a copolymer, which is a polymer made up of two distinct monomers.

The monomers used to make sodium polyacrylate polymer chains acrylic acid (H₂C=CHCOOH) and its sodium salt (H₂C=CHCOONa) .

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Answer:I think it might be 6????

Explanation: I could be totally wrong so I apologize if so

Answer:

Follows are the solution to the given question:

Explanation:

Following are the balanced redox equation:

\(Cr_2O_7^{2-} + 6 Fe^{2+} + 14H^{+} \to 2Cr^{3+} + 6 Fe^{3+} + 7H_2O\)

Calculating the average volume of the dichromate:

\((i)\ 13.8 - 2.3 = 11.5 \ ml\\\\(ii)\ 24.4 - 13.8 = 10.6\ ml\\\\(ii)\ 35.2 - 24.4 = 10.8 \ ml\\\\(iv)\ 45.9 - 35.2 = 10.7\ ml\)

\(Mean\ volume = 10.9\ ml = 0.0109\ L\\\\moles\ Fe^{2+} \ titrated = 0.01500 \ L \times 0.07\ \frac{mol}{L} = 0.00105 \\\\moles\ Cr_2O_7^{2-}\ required = 0.00105\ mol\ Fe^{2+} \times 1 \ mol\ \frac{Cr_2O_7^{2-}}{6 \mol\ Fe^{2+} } = 0.000175 \ moles\ Cr_2O_7^{2-}\\\\Concentration \ of\ Cr_2O_7^{2-} = \frac{0.000175\ moles}{0.0109\ L} = 0.01606\ M\\\\\)

Answer:

mgh is the formula for potential energy

Answer:

Fisica, Astronomia, Biologia

Explanation:

con esta relacion entre ellas se puede explicar y comprender fénomenos de la naturaleza.

Homogeneous and heterogeneous mixture in colloid, suspension and solution

A colloid is a heterogeneous mixture in which the dispersed particles are intermediate in size between those of a solution and a suspension and within the categories of homogeneous and heterogeneous mixtures there are more specific types of mixtures including solutions is alloys, suspensions, and colloids and a solution is a mixture where one of the substances dissolves in the other and the substance that dissolves is called the solute

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Answer: no water

Explanation:

Answer:

a substance that is a crystalline compound, contains no water

Answer:

Oxidation is the loss of electrons or an increase in the oxidation state of an atom, an ion, or of certain atoms in a molecule. Reduction is the gain of electrons or a decrease in the oxidation state of an atom, an ion, or of certain atoms in a molecule.

Explanation:

To solve such this we must know the concept of redox reaction. Therefore, The cause of rejection of classical concept of oxidation and reduction reaction is in any process, oxidation can occur only if reduction is also taking place side by side and vice versa.

Chemical reaction is a process in which two or more than two molecules collide in right orientation and energy to form a new chemical compound. The mass of the overall reaction should be conserved. There are so many types of chemical reaction reaction like combination reaction, double displacement reaction.

Oxidation and reduction reaction involves gain of electron and loss of electron simultaneously. This type of reaction is called redox reaction. The cause of rejection of classical concept of oxidation and reduction reaction is in any process, oxidation can occur only if reduction is also taking place side by side and vice versa.

Therefore, the cause of rejection of classical concept of oxidation and reduction reaction is in any process, oxidation can occur only if reduction is also taking place side by side and vice versa.

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Remember that the molar mass of each element given in the question you can find it in the periodic table.

The molar mass of Al is 27 g/mol, the molar mass of S is 32g/mol, and the molar mass of O is 16 g/mol.

We have to do an algebraic sum to find its molar mass. You can see that we have 2 moles of Al, 3 moles of S and (3)(3) = 9 moles of oxygen. The algebraic sum would be the molar mass of each element mmultiplied byits molar mass and then sum all the results we obtained, like this:

27g/mol×2+16g/mol×9+32 g/mol×3=294 g/mol.

The answer would be that we have 294 g/mol of Al2(SO3)3.

1.43 × 10⁻²⁰ mol Li

Math

Pre-Algebra

Order of Operations: BPEMDAS

Chemistry

Atomic Structure

Step 1: Define

8.63 × 10³ atoms Li

Step 2: Identify Conversions

Avogadro's Number

Step 3: Convert

Step 4: Check

Follow sig fig rules and round. We are given 3 sig figs.

1.43355 × 10⁻²⁰ mol Li ≈ 1.43 × 10⁻²⁰ mol Li

Answer:

C.

Explanation:

Butane (C4H10) has 3 C-C bonds in the carbon chain and 10 C-H bonds

Butane (\(C_4H_10\)) has 3 C-C bonds in the carbon chain and 10 C-H bonds

Alkanes are saturated hydrocarbons. This means that their carbon atoms are joined to each other by single bonds.

Based on the diagram, butane is considered to be an alkane. It not only contains single covalent bonds, but also has carbon and hydrogen atoms present in its structure.

When comparing both structures to one another, isobutane is a branched chain, while butane is a linear chain.

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Answer:

Sea turtle

Is the animal in the image

The molecule that is polar is (b) PF5.

PH3 (a) is a nonpolar molecule, because the three hydrogen atoms are arranged around the central phosphorus atom in a trigonal pyramid shape, and the dipole moments of the three P-H bonds cancel each other out.

CS2 (c) is also a nonpolar molecule, because the carbon atom is surrounded by two sulfur atoms, and the three atoms are arranged in a straight line. The dipole moments of the two C-S bonds cancel each other out.

CCl4 (d) is a nonpolar molecule, because the four chlorine atoms are arranged around the central carbon atom in a tetrahedral shape, and the dipole moments of the four C-Cl bonds cancel each other out.

On the other hand, PF5 (b) is a polar molecule, because the five fluorine atoms are arranged around the central phosphorus atom in a trigonal bipyramidal shape, and the dipole moments of the five P-F bonds do not cancel each other out. The molecule has a net dipole moment pointing towards the more electronegative fluorine atoms.

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Answer:

your answer should be B ANDC

Answer:

B and c is your answer

Explanation:

The correct answer is option C.0.1 M CH3COOH dissolved in 0.1 M HCl has the lowest percent ionization of acetic acid.

The percent ionization of acetic acid can be represented as:α = [H+] [CH3COO-] / [CH3COOH]Given three different solutions:a) 0.1 M CH3COOH.b) 0.1 M CH3COOH dissolved in 0.2 M NH3.c) 0.1 M CH3COOH dissolved in 0.1 M HCl.To calculate the percent ionization of acetic acid, we first need to calculate the equilibrium concentration of [H+] ion.Based on the given solutions, we can assume that the concentration of [H+] ion will be highest in solution (c) because of the presence of strong acid HCl which will completely dissociate into its ions and increases the concentration of [H+] ion. This makes the percent ionization of acetic acid the lowest in solution (c).Therefore, the correct answer is option C.0.1 M CH3COOH dissolved in 0.1 M HCl has the lowest percent ionization of acetic acid.

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The molarity of the 12 mL HCl solution needed to neutralise 20 mL 0.010 M Ca(OH)₂ solution is 0.033 M

2HCl + Ca(OH)₂ —> CaCl₂ + 2H₂O

From the balanced equation above,

The mole ratio of the acid, HCl (nA) = 2

The mole ratio of the base, Ca(OH)₂ (nB) = 1

MaVa / MbVb = nA / nB

(Ma × 12) / (0.01 × 20) = 2

(Ma × 12) / 0.2  = 2

Cross multiply

Ma × 12  = 0.2 × 2

Ma × 12 = 0.4

Divide both side by 12

Ma = 0.4 / 12

Ma = 0.033 M

Thus, the molarity of the HCl solution is 0.033 M

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Answer:

A. Air moves from high pressure to low pressure

Answer:

0.600

Explanation:

Hope this helps!

If the water vapor content remains the same and the temperature decreases, the relative humidity rises.

If the water vapor content remains the same and the temperature increases, the relative humidity falls.

This is because colder air doesn’t need as much moisture to become saturated as warmer air.

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The electron configuration of an atom is determined by the Aufbau principle, which states that electrons occupy the lowest energy orbitals available. For the Fe (iron) atom, the atomic number is 26, meaning it has 26 electrons.

To determine the set of four quantum numbers for the last electron added to the Fe atom, we need to consider the electron configuration. The electron configuration of Fe can be represented as: 1s2 2s2 2p6 3s2 3p6 4s2 3d6.

The last electron added to the Fe atom is added to the 3d sublevel, specifically the 3d6 orbital. Therefore, the set of four quantum numbers that could represent the last electron added to the Fe atom are:

n = 3 (principal quantum number)

l = 2 (azimuthal quantum number, representing the d orbital)

ml = -2, -1, 0, 1, 2 (magnetic quantum number, representing the five possible d orbitals)

ms = +1/2 or -1/2 (spin quantum number, representing the two possible electron spin directions)

So, the set of four quantum numbers for the last electron added to the Fe atom in accordance with the Aufbau principle would be n = 3, l = 2, ml = -2, and ms = +1/2 or -1/2.

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Answer and Explanation:

N.B.: Mild steel is steel that has low carbon content, also called carbon steel.

I hope this explanation was helpful.

Answer:

Explanation:

Answer:

All living organisms are made up of one or more cells, which are considered the fundamental units of life. Even unicellular organisms are complex! Inside each cell, atoms make up molecules, which make up cell organelles and structures. In multicellular organisms, similar cells form tissues.

Explanation:

Answer:

All living organisms are composed of one or more cell

Explanation:

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The mass of oxygen gas produced, given that 15.8 g of potassium permanganate is heated until no more oxygen gas is given off is 1.6 g

From the question given, the following data were obtained:

The mass of oxygen gas produced from the reaction can be obtained as follow:

Mass of potassium permanganate = Mass of remaining substance + mass of oxygen

Inputting the given parameters, we have:

15.8 = 14.2 + mass of oxygen

Collect like terms,

Mass of oxygen = 15.8 - 14.2

= 1.6 g

Thus, we can conclude that the mass of oxygen gas produced from the reaction is 1.6 g

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