What mass of sodium hydroxide is required to make 200 cm^3 of sodium hydroxide solution of concentration 0.4 mol/dm^3.
0.4 g
3.2 g
8.0 g
16.0 g

The volume of the gas is directly proportional to the number of moles of the gas. Hence, when volume is reduced to 8.65 L to 4.39 L, number moles reduces to 0.24 mol.

According to Avogadro's law, the volume of a gas is directly proportional to the number of moles. Thus n/V = a constant

If n1 and V1 be the initial number of moles and volume and n2, V2 be the final quantities, then,

n1/V1 = n2/V2

Given, n1 = 0.474 mol

V1 = 8.65 L

V2 = 4.39 L

then, n2 = n1 V2/V1

n2 = (4.39 L× 0.474)/8.65 mol

    = 0.24 mol

Therefore, the number of moles of gas at the reduced volume is 0.24 mol.

Find more on Avogadro law:

https://brainly.com/question/6590381

#SPJ1

The presence of more electron shells and electron shielding causes atomic size to rise as you descend a column. Because of more protons, atomic size shrinks as you move to the right across a row. Samantha, one of Test Prep Academy's tutors, wrote this essay specifically for you.

To learn more about atoms, refer to:

https://brainly.com/question/6258301

#SPJ4

Without the information about the compound, it is not possible to rank the carbon atoms in order of increasing chemical shift.

In an NMR spectrum, the chemical shift (δ) of a carbon atom is a measure of the electron density around that carbon atom. The chemical shift is typically measured in parts per million (ppm) and is dependent on the chemical environment of the carbon atom.

In order to rank the indicated carbon atoms in order of increasing chemical shift, it is important to know the chemical structure of the compound and the chemical environment of each carbon atom. Without the information about the compound, it is not possible to rank the carbon atoms in order of increasing chemical shift.

To know more about carbon atoms visit:

https://brainly.com/question/2544405

#SPJ4

Pentanoic acid product will obtained from reaction of 1-pentanol with Cro₃, H₂o, H₂SO₄.

Reactants are the chemical substances that take part in chemical reactions to create new substances, or products. Chemical reactions between reactants produce new substances, which are referred to as products.

Chemical reactions are the transformation of one or more reactants into one or more new products. Materials are composed of chemical building blocks or compounds. Various products are created by rearranging the atoms that make up the reactants in a chemical reaction.

A chemhttps://brainly.com/question/29039149als into one or more other chemicals. Rust, for instance, is produced when iron and oxygen come together. Sodium acetate, carbon dioxide, and water are produced when vinegar and baking soda are mixed.

chemical reaction is attached below

To know more about chemical reactions visit:

https://brainly.com/question/29039149

#SPJ4

Answer:

a green stick insect

Explanation:

it can meddle into the green trees when it sees is hunter it hides

hope this was helpful

The conduction band in the molecular orbital diagram because it's an electron occupying the valence bound.

Because an electron occupies the valence bound, the conduction band in the molecular orbital diagram. A molecular orbital diagram, also known as a MO diagram, is a qualitative descriptive tool used to describe chemical bonding in molecules using molecular orbital theory in general and the linear combination of atomic orbitals approach in particular. A molecular orbital diagram is used to study the bonding of a diatomic molecule. MO diagrams may be used to identify the magnetic characteristics of a molecule and how they change with ionisation. They also show the bond order of the molecule, or how many bonds are shared between the two atoms.

Here,

Because an electron occupies the valence bound, the conduction band in the molecular orbital diagram.

To know more about molecular orbital diagram,

https://brainly.com/question/18369905

#SPJ4

The major product(s) of electrophilic chlorination of o-xylene is attached below.

Among the most frequently used chemical processes are those in which an electrophilic chlorine atom is transferred from a chlorinating agent to a nucleophilic substrate. Microscale organic synthesis is one example of an application, while multitonnage scale industrial applications are another.

While chlorine (Cl) gains a partial negative charge when attached to carbon, carbon gains a partial positive charge as a result. Here, the positively charged Carbon will act as the electrophile ( C ).

Electrons in the chlorine-chlorine bond are repelled as a chlorine molecule approaches the benzene ring by the ring's delocalized electrons. Chlorine functions as an electrophile thanks to its slightly positive end.

To know more about chlorination visit:

https://brainly.com/question/26831851

#SPJ4

The physical properties of substances are those properties that can be seen and observed as the chemical properties of substances.

Chemical changes occur when bonds are crushed and/or formed between molecules or atoms. This method that one substance with a definite set of properties (such as melting point, color, taste, etc) to rotate into a different substance with different properties.

A physical property is a characteristic of a substance that can be noticed or measured without changing the specification of the substance. Physical properties involved color, density, hardness, and melting and boiling points.

So we can conclude that those properties occur as the result of a chemical reaction and change the constitution of the substance.

Learn more about substance here: https://brainly.com/question/24647756

#SPJ1

An organic compound's physical characteristics are determined by the alkyl portion (carbon chain), but its chemical characteristics are determined by the functional group.

The melting and boiling points of organic molecules are comparatively low. The sort of attraction forces used in each situation to retain the particles close to one another is the cause of these variations.

The boiling point and solubility of organic molecules are two highly typical physical characteristics. The capacity of a material to dissolve in a solution is known as solubility. Density is another physical characteristic.

To know more about Functional groups visit:

brainly.com/question/14618322

#SPJ1

The partial pressure of F2 and a mixture of gases where the total pressure is one atm. The mole fraction of F2 is 0.394736.

The term mole fraction is defined as the number of molecules of a component in a mixture is divided by the total number of moles in the given mixture.

Total pressure = 1 atm

= 760 torr

Then,

The partial pressure of F2 = 300 torr

The mol fraction of F2 = PF2/PT

= 300/760

= 0.394736

Thus, The partial pressure of F2 and a mixture of gases where the total pressure is one atm. The mole fraction of F2 is 0.394736.

To learn more about the mole fraction, follow the link;

https://brainly.com/question/8076655

#SPJ1

The average rate of change of B from t=0 to t=362 s is [tex]0.001883 M/s.[/tex]

The average rate of change of B can be determined using the formula:

rate = (change in concentration of B) / (change in time)

We can calculate the change in concentration of B by subtracting the initial concentration of B from the final concentration of B:

change in concentration of B = final concentration of B - initial concentration of B

We can calculate the change in time by subtracting the initial time from the final time:

change in time = final time - initial time

We can use the stoichiometry of the reaction to convert the concentration of A to the concentration of B:

2A -> B

change in concentration of B = (2 * change in concentration of A)

We can use this information to calculate the average rate of change of B from t=0 to t=362 s:

change in concentration of B = [tex](2 * (0.425 M - 0.170 M)) = 0.680 M[/tex]

change in time = [tex]362 s - 0 s = 362 s[/tex]

rate = [tex](0.680 M) / (362 s) = 0.001883 M/s[/tex]

Therefore, the average rate of change of B from t=0 to t=362 s is [tex]0.001883 M/s.[/tex]

To know more about average rate of change visit: https://brainly.com/question/28744270

#SPJ4

The material that is located inside the container is a mixture consisting of two compounds. That is option B.

A compound is defined as a chemical substance that is composed of identical molecules consisting of atoms of two or more chemical elements and which are chemically combined together.

In the above mixture there are two different compounds that are chemically combined together through Chemical bonds. That is compounds of blue and red colour.

Therefore the mixture represented above is a mixture consisting of two compounds.

Learn more about chemical compounds here:

https://brainly.com/question/26556885

#SPJ1

Answer:

Its D

Explanation:

A mixture consisting of two elements

205.7 cm^3 (or 0.2057 L) of the concentrated tetraoxosulphate (VI) acid to prepare 8 dm^3 of a 0.5 mol/dm^3 solution of the compound.

To prepare 8 dm^3 of a 0.5 mol/dm^3 solution of tetraoxosulphate (VI) acid from a stock solution, you need to use:

(0.5 mol/dm^3) x (8 dm^3) x (98 g/mol) = 392 g of tetraoxosulphate (VI) acid

Since the acid is 97% pure, we know that:

(97/100) x (392 g) = 379.84 g of tetraoxosulphate (VI) acid is pure acid

We can use the specific gravity of the acid, which is 1.84 g/cm^3, to calculate the volume of the acid needed:

379.84 g / (1.84 g/cm^3) = 205.7 cm^3 of tetraoxosulphate (VI) acid

So, you would need to use 205.7 cm^3 (or 0.2057 L) of the concentrated tetraoxosulphate (VI) acid to prepare 8 dm^3 of a 0.5 mol/dm^3 solution of the compound.

learn more about tetraoxosulphate (VI) acid: https://brainly.com/question/9004762

#SPJ1

Answer:

Explanation:

In stoichiometric combustion of a hydrocarbon fuel, the fuel is reacted with the exact amount of oxygen required to oxidize all carbon, hydrogen, and sulfur in the fuel to CO2, H2O, and SO2.

Answer:

carbon, hydrogen, and sulfur.

A sulfonic acid functional group is added to the molecule during the process of sulfonation. Aromatic sulfonation occurs when the sulfonic acid group is added to aromatic compounds.

Fluorine raises the electron density at the ring by mesomeric action and is an ortho and para directing group, leading to the formation of p-fluorobenzene-sulfonic acid and o-fluorobenzene-sulfonic acid during the sulfonation of fluorobenzene. Since substitution between two groups seldom happens, both -OH and -Br are ortho and para directed, resulting in the formation of the two products 2-Bromo-4-hydroxybenzenesulfonic acid and 4-Bromo-2-hydroxybenzenesulfonic acid. As -Cl is an ortho and para directing group, 2,4-Dichlorobenzene-sulfonic acid results from the sulfonation of m-dichlorobenzene. 2,4-Dibromophenol is sulfonated to produce 3,5-Dibromo-2-hydroxybenzenesulfonic acid as the end product.

To learn more about sulfonation click here https://brainly.com/question/13422316

#SPJ4

The Gibbs free energy (ΔGrxn) when PNO₂ is0.109 atm and PNO is 9.2 atm at 25°C is 31.4KJ option - c is correct answer.

By adding the energies from the reaction's right and left sides, respectively, and deducting them, we can determine the Gibbs Free energy (Grxn) of any reaction. The calculation shows that the reaction moves to the right if Grxn > 0. The reaction moves to the left if the Grxn is greater than 0.

we have to use the equation

ΔG(rxn)=ΔG°(rxn)+RTlnQ  ------1

where

ΔG°(rxn) of the reaction given  9.4 kJ

R = gas constant 0.008314 kJ/mol K

T =  273 + 25  = 298 K

furst you have to find the Q value

Q = [NO] / [NO₂]₂

Q = [9.2] / [0.109]3

Q = 9.2 / 0.01188  = 7104.088

substitute the values in equation 1

ΔG(rxn)= 9.4 kJ + (0.008314 kJ/mol K)(298K) ln(7104.088)

ΔG(rxn)= 9.4  + 21.97

ΔG(rxn)= 31.37 kJ

To know more about Gibbs free energy visit:

https://brainly.com/question/20358734

#SPJ4

1.24KJ of energy is absorbed as heat by each reaction. When systems or objects have different temperatures, energy is transferred as heat.

Kinetic energy passes through a material or an item, or it moves from an energy source to a material or an object, to create heat. Radiation, conduction, and convection are the three possible transmission methods for this type of energy.

Temperature and heat are not the same thing. The sum of an object's atoms' kinetic energy is its heat energy. The average kinetic energy of a substance's atoms is its temperature.

        moles =4.889/315.391mole=0.01548 moles

OH =80.3KJ*0.01548 mol Ba(OH)₂·8H₂O/1mol of Ba(OH)₂·8H₂O

     =1.24 KJ

To know more about heat visit:

https://brainly.com/question/13860901

#SPJ4

Chromatography separation technique can be used to separate colors in dyes or markers without using heat.

What is chromatography?

Chromatography is a method of separating substances from a mixture by passing them through a medium, such as a column, to separate them according to their molecular structure. Substances are separated when they interact differently with the medium, allowing them to be identified. Chromatography has a wide range of uses and is an important analytical technique in many industries and fields. It is used to identify and measure the amounts of various substances in a sample, such as in food, pharmaceutical, and environmental testing. Chromatography is also used to purify and separate organic compounds, including proteins, nucleic acids, and metabolites.

Therefore, Option A is correct.

To learn more about chromatography

Here: https://brainly.com/question/11960023

#SPJ1

The equilibrium constant kc for the reaction X2(g) + 2Y(g) <=> 2XY(g) is 4 assuming the volume is 2L.

Given the reaction is X2(g) + 2Y(g) <=> 2XY(g)

By doubling the reactants we get 2X2(g) + 4Y(g) <=> 4XY(g)

Consider the mole ratio of the following reactants and products by taking one mole of each molecule initially.

Let the concentration of X2 = 2/2 = 1

The concentration of Y = 2/2 = 1

The concentration of XY = 4/2 = 2

We know that the equilibrium constant that describes this equilibrium is equal to Kc.

Kc = [AB]^2/[A].[B] = (2)^2/1 x x = 4

Hence the  equilibrium constant Kc = 4

To learn more about equilibrium constant click here https://brainly.com/question/10038290

#SPJ4

complete question: The diagram represents the equilibrium state for the reaction X2(g) + 2 Y(g) == 2 XY(g) Assuming the volume of the cylinder is 2 L, calculate the equilbrium constant; Kc , for this reaction. Assume that each molecule represents one mole Kc How will the number of XY molecules change if the volume of the equilibrium mixture is increased?

The answer is A. Mesosphere. It isn't the least dense overall, but it is out of these options.

Answer:

D: is the correct answer

The de Broglie wavelength of a 300-g object moving at a velocity of 50 m/s  is  4×10³⁵ meters. Hence, option (B) is correct.

When studying quantum mechanics, the de Broglie wavelength is a key idea. De Broglie wavelength is the wavelength (λ) that is connected to an item in relation to its momentum and mass. Typically, a particle's momentum is inversely proportional to its de Broglie wavelength.

The de Broglie wavelength of a 300-g object moving at a velocity of 50 m/s  is = Planck constant/momentum

= 6.6 ×10⁻³⁴/(0.300×50) meter

= 4×10³⁵ meters.

The de Broglie wavelength of a 300-g object travelling at 50 m/s is 4*10^35 meters. As a result, option (B) is accurate.

Learn more about de Broglie wavelength here:

https://brainly.com/question/29987996

#SPJ4

Answer:

From Wolff Kishner Reduction we can say that the product thus formed will be ethylbenzene.

Explanation:We know that acetophenone has (COCH3) attach to it as a functional group. When it reacts with hydrazine that is (NH2NH2) in the presence of a strong base such as KOH and heat, an intermediate known as hydrazone is formed. Hydrazone are a cousin of imines. Here the oxygen gets replaced with hydrazine and water is released. Then after deprotonation of NH we have protonation at carbon of the functional group. Then we again have deprotonation of NH and finally N2 is released and we have a protonation of carbon which results in ethylbenzene.

To know more about Wolff Kishner Reduction:https://brainly.com/question/15408743

#SPJ4

The given reactions are of following types:

1. exchange

2. exchange

3. exchange

4.condensation

5. cleavage

Most chemical reactions can be classified into one or more of five basic types: Acid-base reaction, exchange reaction, condensation reaction, cleavage reaction, redox reaction. Condensation reactions occur when one or more compounds combine to form a complex compound. Cleavage reactions are the opposite of synthesis reactions. In fission reactions, more complex compounds are broken down into a few simpler compounds. An exchange reaction is a type of redox reaction in which one element in a compound is replaced by another. Displacement and double displacement reactions are also termed as exchange reactions as a part of ionic compounds is exchanged. Reaction 1, 2, 3 is thus a exchange reaction as the follow the same nature. Reaction 4 is condensation reaction while reaction 5 is a cleavage reaction.

Learn more about condensation here:

https://brainly.com/question/4043946

#SPJ4

The complete question is

Classify each reaction as an exchange reaction, a condensation reaction, or a cleavage reaction.

1. 2NH4CL+Ba(NO3)2-->2NH4NO3+BaCl2 -- ( --?-- )

2. HCl+NaOH---> NaCl+ H2O –

3. Ca+2HCl---> CaCl+H2 --

4. CaO+CO2--->CaCO3 -- ( --?-- )

5. 2H2O-->2H2+O2 --

The amino acid side chain residues in an alpha helix point away from the center of the helix.

Amino acids are the building blocks of proteins. There are 20 different amino acids that can be used to make proteins, and these amino acids are joined together by peptide bonds to form long chains, called polypeptides. These polypeptides then fold into specific three-dimensional structures, which determine the function of the protein. Amino acids can be classified as essential or non-essential. Essential amino acids are those that cannot be synthesized by the body and must be obtained from the diet, while non-essential amino acids can be produced by the body. The sequence of amino acids in a protein determines its specific function in the body. Some examples of important proteins in the body include enzymes, hormones, and structural proteins such as collagen and keratin.

To know more about amino acid  please refer: https://brainly.com/question/1837143

#SPJ4

Option B is the correct option means solid and liquid. Both physical states are present in this melting process

Hence, The physical state(s) present when a substance is melting is (are) a) solid is solid and liquid.

To learn more about substance refer to:

https://brainly.com/question/24647756

#SPJ4

The formation of molecule can easily be shown by drawing Lewis dot structure. Therefore, in the below given ways we can draw the Lewis dot structure.

Lewis dot structure is a way to represent the valence electron of an element in the form of dot. These are mainly beneficial in understanding the chemical formula of covalent compound.

Steps to draw Lewis dot structure of CO[tex]_2[/tex]:

The entire quantity of valence electrons should be known. Total number of electrons= 16

Draw single bonds from the core atom to other atoms while placing the lowest electronegative element in the middle.

Identify the number of additional electrons the core element needs.

Increase the core atom's double or triple bonds until it possesses a complete octet.

until the outer elements have complete octets, add electrons to them.

O=C=O

Therefore, in the above given ways we can draw the Lewis dot structure.

To learn more about Lewis dot structure, here:

https://brainly.com/question/20300458

#SPJ1

a. (R)-2-pentanol product results from the SN2 reaction between (R)-2-chloropentane and hydroxide

The SN2 reaction, also known as a substitution reaction , is a type of reaction in which a nucleophile (in this case, hydroxide) attacks the electrophilic carbon atom of an alkyl halide (in this case, (R)-2-chloropentane) in a one-step, bimolecular process. The reaction proceeds with the inversion of the configuration of the carbon atom that was originally attached to the leaving group.The nucleophile (OH-) attacks the carbon atom that bears the chlorine atom, this will lead to the formation of (R)-2-pentanol and chloride anion. It is important to note that the reaction inversion of the configuration at the carbon atom that bears the chlorine atom, which means that the product is the enantiomer of the starting material, which is (R)-2-pentanol

Learn more about  substitution reaction here:

https://brainly.com/question/27548297

#SPJ4

The generic structure of a soap is a long-chain fatty acid salt, typically consisting of a carboxylate group (-COO-) and a long hydrocarbon tail.

Soaps are typically made by the process of saponification, which is the reaction of a fat or oil (such as vegetable oil or animal fat) with a strong base (such as lye or NaOH) to produce glycerol and the salt of a long-chain fatty acid. The saponification reaction can be represented by the following equation:

Fat or oil + NaOH → Glycerol + Soap (salt of a long-chain fatty acid). If anhydrous methanol is used, water is not added directly to the system. However, methanol is a good solvent for water, so if the reaction mixture contains traces of water, it could dissolve in the methanol and be present in the system.

Learn more about saponification  here:

https://brainly.com/question/19033481

#SPJ4

The largest negative number would be ΔHmix, which is equal to the sum of ΔHsolvent and ΔHsolute. In the case of the dissolution of LiCl in water, ΔHsolvent is positive and ΔHsolute is negative, so the sum of the two results in a negative number.

ΔHmix is the enthalpy of mixing, which is the amount of energy released or absorbed when two substances are mixed together. ΔHmix is equal to the sum of the enthalpy of the solvent (ΔHsolvent) and the enthalpy of the solute (ΔHsolute).

ΔHmix is usually expressed in terms of the amount of energy released or absorbed per mole of the substance being mixed. For example, the enthalpy of mixing for the dissolution of LiCl in water would be

ΔHmix = ΔHsolvent + ΔHsolute = +24kJ/mol + -37kJ/mol = -13kJ/mol.

This means that -13kJ of energy is released per mole of LiCl dissolved in water.

Learn more about ΔHmix:

https://brainly.com/question/14846194

#SPJ4

Answer:

B. a tree decomposing in a forest