the volume of a sample of hydrogen gas was decreased from 12.35 l12.35 l to 5.64 l5.64 l at constant temperature. if the final pressure exerted by the hydrogen gas sample was 5.00 atm,5.00 atm, what pressure did the hydrogen gas exert before its volume was decreased?

This reaction's enthalpy change will be twice that of bromine monochloride's, BrCl, typical enthalpy change of production.

What does enthalpy mean in plain English?

Enthalpy is a property or state function that resembles energy; it has the same dimensions as energy and is therefore measured in joules or ergs. The value of enthalpy is solely dependent on the temperature, pressure, or composition of the system, not on its history.

Entropy vs. enthalpy: what are they?

Entropy is indeed the amount the intrinsic disorder inside a substance, whereas enthalpy is the quantity of internal energy. Enthalpy becomes nonzero for water because it is zero in elemental compounds like hydrogen gas or oxygen gas (regardless of phase).

Briefing:

1/2Br2(g) + 1/2Cl2(g) → BrCl(g)

Here, ΔH°rxn = ΔH°f

This means that the enthalpy change for this reaction will be twice the value of ΔH°f = 2 moles BrCl

Using Hess' law,

ΔH°f = total energy of reactant - total energy of product

= (1/2 * (+112) + 1/2 * (+121)) - 14.7

= 101.8 kJ/mol

ΔH°rxn = 101.8 kJ/mol.

To know more about enthalpy visit:

https://brainly.com/question/13996238

#SPJ4

We can see conversion of an alcohol to an alkane.

Reagents needed:

1. Sodium or Potassium Hydride.

2. Hydrogen Gas.

What is  a functional group?

A functional group is a group of atoms or molecules within a larger molecule that is responsible for the molecule's chemical and physical properties. Functional groups have specific chemical characteristics, such as polarity, reactivity, and solubility, that give the molecule its unique properties.

What is functional group interconversion?

Functional group interconversion is a type of chemical reaction in which one functional group is converted into another functional group. This type of reaction is used to modify the properties of a molecule, such as its reactivity, solubility, and stability. Examples of functional group interconversion include the conversion of an alcohol to an aldehyde, an aldehyde to a ketone, and an ester to an amide.

To know more about Functional group,

https://brainly.com/question/10058230

#SPJ4

The net ionic reaction for the precipitation reaction is

b)SrCl₂ + K₂SO₄ → SrSO₄ + 2KCl

The precipitation reaction between strontium chloride (SrCl₂) and potassium sulfate (K₂SO₄) is a double replacement reaction and produces an insoluble solid. The net ionic reaction for this precipitation reaction is as follows:

SrCl₂ + K₂SO₄ → SrSO₄ + 2KCl

In this reaction, a cation (positively-charged ion) from one reactant (strontium) is exchanged for a cation from the other reactant (potassium). At the same time, an anion (negatively-charged ion) from one reactant (chloride) is exchanged for an anion from the other reactant (sulfate). The products of this reaction are a soluble sodium chloride solution and an insoluble strontium sulfate solid. The insoluble solid separate out of the solution, forming a precipitate.

Hence the correct option is B.

To know more about ionic equations, click below:

https://brainly.com/question/13879496

#SPJ4

The Molecular formula of Decane is C10H22

Combustion of Decane as follows ;                                                            C10H22 (l) + O2 (g) ==>  CO2(g)+ H2O(g) ,When we burn Liquid Decane(C10H22) into oxygen(O2) gas then it produce  Water vapour and Carbon dioxide gas.

The balance equation of Combustion as follows ;

2C10H22 (l) + 31O2 (g) ==>  20CO2(g)+ 22H2O(g)

Learn more about combustion here ; https://brainly.com/question/13153771?referrer=searchResults

#SPJ4

Micronutrient is another name for a trace element. It is also described as any chemical component of a crucial enzyme that is needed by living things in minute or small levels.

In biology, a trace element is any chemical element that is needed by living things in very small levels (less than 0.1 percent by capacity [1,000 parts per million]), typically as a component of an essential activity (a cell-produced catalytic protein).

Minerals known as trace elements or trace metals are minor levels of which are found in living tissues. Some of them have been known to be physiologically necessary, some might be (but the evidence is merely speculative or sparse), and the rest are regarded as nonessential.

To know more about trace element visit :

https://brainly.com/question/14830792

#SPJ4

reaction between an alkyne and one equivalent of hcl . 3 methyl pent 1 yne or 3 methyl 1 pentyne is treated with h c l to give the product. the structure shows a 5 carbon chain where there is a triple bond between carbons 1 and 2 and a methyl substituent on carbon 3.

An inorganic chemical is HCL. The chemical name for it is HCl, and it is a potent corrosive acid. It is also referred to as muriatic acid or hydrogen chloride. Chemically, carbon is an element with the symbol C and atomic number 6. Carbon, which is categorized as a nonmetal, is a solid at ambient temperature.

Learn more about carbon here:

https://brainly.com/question/22530423

#SPJ4

As pco2 levels were increased, the concentration of a Nitrogen gas in the inhaled air was decreased in order to maintain the oxygen levels.

Atomic number 7 and the letter N designate nitrogen as the chemical element. Group 15 of the periodic table, also known as the pnictogens, contains Nitrogen gas as the lightest nonmetal element. It ranks seventh in overall abundance in the Milky Way and the Solar System, making it a common element in the cosmos. When conducting a chemical analysis, Nitrogen gas is frequently used to prepare samples.

With an atomic number of 8 and the chemical symbol O, oxygen is the eighth chemical element. It belongs to the chalcogen group in the periodic table, is a very reactive nonmetal, and is an oxidising agent that easily forms oxides with most elements as well as with other compounds. With an atomic number of 8 and the chemical symbol O, oxygen is the eighth chemical element.

learn more about Nitrogen gas here

https://brainly.com/question/13907528

#SPJ4

Answer:

Crack Repair

Explanation:

The process of filling a damaged, broken, lifted, or cracked monomer liquid and polymer powder nail enhancement with additional monomer liquid and polymer powder is called crack repair.

A polymer can be natural or synthetic substance, composed of very large molecules that are multiples of simpler chemical units called monomers.

There are 3 major classes of polymers –

Thermoplastics,

Thermosets, and

Elastomers.

To know more about Polymers:

brainly.com/question/17354715

##SPJ4

The best indicator for the pH of 4 x 10⁻⁴ M HCl would be bromocresol purple which is yellow at the pH of HCl = 3.4.

Ka for acetic acid = [H₃O⁺][A⁻]/[HA]

knowing pH,

pH = -log[H₃O⁺]

[H₃O⁺] = [A⁻]

and, [HA] concentration we can determine Ka for each solution

for basic salts as

Na₂CO₃, the net ionic equation would be,

(CO₃)₂⁻ + H₂O <==> HCO₃⁻ + OH⁻

NaHCO3, the net ionic equation would be,

HCO₃⁻ + H₂O <==> H₂CO₃ + OH⁻

similarly, other salts which give OH- ion in solution is basic and the ones that give H₃O⁺ in solution are acidic in nature,

acidic salts like NH₄⁺

NH₄⁺ + H₂O <=> NH₃ + H₃O⁺

Hence, the best indicator for the pH of 4 x 10⁻⁴ M HCl would be bromocresol purple which is yellow at the pH of HCl = 3.4.

To learn more about acids, bases, and salt,

https://brainly.com/question/14091731

#SPJ4

It goes SP2 hybridization on reacting substrate carbon atom in the passage undergo hybridization state changes during the reaction.

SP2 hybridization is the mixing of one s and two p atomic orbitals, which involves the promotion of one electron in the s orbital to one of the 2p atomic orbitals. The combination of these atomic orbitals creates three new hybrid orbitals equal in energy-level. The hybrid orbitals are higher in energy than the s orbital but lower in energy than the p orbitals, but they are closer in energy to the p orbitals. The new set of formed hybrid orbitals creates trigonal structures, creating a molecular geometry of 120 degrees. One of a set of hybrid orbitals produced when one s orbital and two p orbitals are combined mathematically to form three new equivalent orbitals oriented toward the corners of a triangle. This involves the mechanism of sp2 hybridization.

To learn more about sp2 hybridization please visit:

https://brainly.com/question/29510593

#SPJ4

Hydrochloric acid has a molarity of 5.708 M, a mass content of 19.0%, and a density of 1.095 g/ml.

Hydrochloric acid, also referred to as muriatic acid, is hydrogen chloride in an aqueous solution. It is odourless and colourless, and it smells strongly. It is classified as a strong acid. It is a component of gastric acid, which is present in the digestive systems of the majority of animal species, including humans.

Hydrogen chloride (HCl) is often used as a bleaching agent to neutralise alkaline compounds in the food, textile, metal, and rubber industries. It is neutralised when released into the soil, and it hydrolyzes quickly when it comes into contact with water.

If hydrochloric acid burns are in contact with skin or other tissues, they can cause excruciating pain. Ingestion of hydrochloric acid might result in blindness. The concentration of the acid and how long it remains in contact with the tissues determine how severe the burns are.

The solute concentration in moles is divided by the volume of the solution in litres to determine the solution's molarity.

M = moles of solute/liters of solution.

By dividing the total number of moles of solute by the total volume of litres of solution, we may determine the molarity.

Consider a 100g solution. The solution has 19.0% of its bulk in hydrochloric acid. and the provided solution has a density of 1.095 g/mol. We may determine the molarity of the solution by inserting each of these values.

mass acid hydrochloric,

100g solution x (19.00g / 100g solution) = 19.00g Hcl

moles of hydrochloric acid is ,

19.00g HCl x (1 mole Hcl / 36.45g HCl) = 0.52126

then, the answer is,

100g solution x (1mL solution / 1.095g solution) x (1L / 1000mL) = 0.091324L

molarity HCl = 0.52126 mole / 0.091324L = 5.708M.

To know more about Hydrochloric Acid visit:

https://brainly.com/question/24586675

#SPJ4

Among the options, covalent bonds form between non-metal and metal elements is not true.

Ionic bonds are formed between non-metal and metal elements whereas formation of covalent bonds takes place between those two identical entities.

Covalent bonds are those created when two atoms couple up and share electrons, forming a bond. Most often, it is formed between two non-metals.

Ionic bonds are formed due to electrostatic attraction. Due to the fact that they typically develop between metals and non-metals, this is created in the oppositely charged ions of the atoms.

To know more about ionic and covalent bonds, visit:

https://brainly.com/question/14062466

#SPJ4

Answer:

In order of decreasing acceleration experienced by each ship, the names of the ships are as follows:

Viceroy

Standard

Skipjack

Thunderor

Eden

Answer:cell potential

Explanation:

Yes. Gay-law Lussac's states that the pressure and temperature of a gas are directly proportional at constant volume.

Why does pressure rise as temperature rises?

According to Gay-Law, the pressure of a given mass of gas varies directly with the absolute temperature of the gas when the volume is held constant.

The pressure of a given quantity of gas is directly proportional to its absolute temperature as long as the volume remains constant (Amontons' law). The volume of a given gas sample is directly proportional to its absolute temperature at a fixed pressure, according to Charles' law.

The frequency of collisions between molecules and the surface of a container generates pressure. If the temperature of the container is raised, the molecules will move faster. The occurrence of

To learn more about : Gay-Lussac's law

brainly.com/question/15697357

#SPJ4

The most appropriate reagent(s) for the conversion of trans-4-tert-butylcyclohexanol to the corresponding tosylate ester is Chromic acid.

What is Chromic acid?

Chromic acid anodizing has been used to protect aluminum from oxidation for many years. The anodizing process builds a basic oxide layer that supports a tubular cell structure. Chromic acid (H2CrO4) reacts with alcohols to form a chromic ester in which the alcohol oxygen atom bridges the carbon and chromium atoms. The ester forms by nucleophilic attack of the alcohol oxygen atom on the chromium atom. This reaction is analogous to an SN2 reaction with an a─OH group of chromic acid as the leaving group.

Learn more about chromic acid here:

https://brainly.com/question/15074489?referrer=searchResults

#SPJ4

The products that will be produced as a result of the given chemical reaction are attached with the answer.

We find that allylic bromination takes place here. It can be defined as the substitution of bromine for hydrogen on a benzylic/allylic carbon. This process is carried out by N-bromosuccinimide (NBS for short). The bromine is substituted next to the double bond (this is called the allylic position).

The products can be different on the basis of the symmetry of the alkene reactant. In the case of a symmetric alkene reactant, one product will be formed (first image attached below). In the case of an asymmetric alkene product, a  mixture of products, because of the two different allylic positions, is formed (second image attached below).

The complete question you might be looking for is attached (third image) below.

Learn to know more about Stereochemistry on

https://brainly.com/question/13266152?referrer=searchResults

#SPJ4

2C6H14(g)+19O2(g)→12CO2(g)+14H2O(g) is the balanced equation reaction for the combustion of hexanol.

The most fundamental and extensively used method for balancing chemical equations is known as "balancing by inspection," sometimes known as trial and error. The amount of tries and errors required to arrive at an equation that is ultimately correctly balanced can be reduced by using a few approaches. A chemical equation cannot be deemed balanced unless the law of conservation of matter is observed. In chemical equations, two distinct types of numbers are used. Subscripts are used in the chemical formulations of the reactants and products. Coefficients are also employed to display the number of molecules of a substance that are consumed or created prior to chemical formulations.

To know more about  balance equation visit : brainly.com/question/28949107

#SPJ4

for the following unbalanced equation.5800 kj is  the standard free energy for the reaction of 7. 2 moles of al2o3(s) at 298k

 First, let's balance the equation. Both sides must have the same amount of each element, so: Al₂O(s) + 3CO(g) 2Al(s) + 3CO2(g)

The free energy can be calculated by: AG = AH-TAS Where AH is the enthalpy of the reaction, and AS is the entropy of the reaction.

Al2O3(s): Hf=-1676.0 kJ/mol; S = 50.92 J/mol.K Al(s): Hf = 0.00; S° = 28.3 J/mol.K

CO(g): Hf=-110.5 kJ/mol; S = 197.6 J/mol.K

CO2(g): Hf=-393.5 kJ/mol; S = 213.6 J/mol.K

AH = Σn*Hf products - En*Hf reactants (n is the coefficient of the compound).

AH = (3*(-393.5) + 2*0) - (3*(-110.5) + (-1676)) = 827KJ

AS = {n*S* products - Σn*S° reactants

AS = (3*213.6 +2*28.3) - (3*197.6 + 50.92) = 53.68J/K = 0.05368 kJ/K

AG 827-298*0.05368 AG = 811 KJ

Which is the free energy for 1 mol of Al2O3

1 mol of Al2O3=811 KJ X 7.2 moles of Al2O3

By a simple direct three rule:  standard free energy is x = 5839.2 kJ = 5800 kJ

Learn more about  standard free energy here:

https://brainly.com/question/10012881

#SPJ4

The limiting reactant is the answer. The limiting reactant is the reactant that is completely used up in the reaction and limits how much product can be formed.

What is reactant?
A reagent, also known as an analytical reagent, is a substance as well as compound that is added to a system in chemistry to either initiate a chemical reaction or determine whether one has already taken place. [1] Although the terms reactant as well as reagent are frequently used interchangeably, reactant refers to a substance that is consumed during a chemical reaction. Despite being part of the reaction mechanism, solvents are not typically referred to as reactants. Catalysts are not reactants because they are not used up in the reaction. The reactants in biochemistry are frequently referred to as substrates, particularly when enzymes are involved in the reaction.

To learn more about reactant
https://brainly.com/question/26505550
#SPJ4

A colorimeter is an instrument used to measure the amount of heat absorbed by a solution. This absorbance is proportional to the concentration of the solute in the solution.

A calorimeter is a device used in calorimetry, a method for measuring the heat of chemical reactions or other physical changes and estimating heat capacity. Differential scanning calorimeters, isothermal micro calorimeters, titration calorimeters, and accelerated rate calorimeters are a few of the most common types.

Two compounds A and B are put one at a time into a calorimeter, and the starting and ending temperatures (before and after the reaction) are noted. This information is used to determine the enthalpy change per mole of substance A in the process. An estimate of the quantity of energy released or absorbed during the reaction can be obtained by multiplying the mass and specific heat capacity of the components by the temperature change. By dividing the energy change by the amount of A that was present, the reaction's enthalpy change is determined.

For more questions like Colorimeterclick the link below

https://brainly.com/question/29384804

#SPJ4

When the metal is seen to start melting at a temperature of about 29°C in its container, gallium is most likely the metal.

A metal is a substance that exhibits a shiny appearance when freshly processed, polished, or shattered, and conducts electricity and heat rather well. Generally speaking, metals are malleable and ductile. These characteristics are the outcome of the metallic link that exists between the metal's atoms or molecules. Any of a group of materials known as metals that exhibit strong thermal and electrical conductivity as well as malleability, ductility, and high light reflection.

Extraction of the unprocessed ore from the earth is the initial step in the production of metal alloys. The non-metal components, like as rock and rubbish, are subsequently removed from the ore during processing. Metal alloys are created by melting and mixing different metal parts.

The majority of pure metals are located in the crust of the earth. Ores, which are solid substances from which metals and minerals can be extracted, are where they are found. Iron makes up almost a third of the planet's mass, and most of it is concentrated in its core.

To know more about Metal visit:

https://brainly.com/question/29404080

#SPJ4

True. Every nonsingular second-order linear ordinary differential equation a(x)u" + 6(x) u' + c(u) u = f(x), subject to homogeneous Dirichlet boundary conditions on an interval [a,b], is (a) self-adjoint.

Generally speaking, homogenous refers to having same pieces or components. Homogeneous refers to something that is consistent in nature or character throughout. A variety of objects that are basically similar to one another or belong to the same sort can also be referred to as homogenous.

A homogenous mixture is one whose composition is constant across the whole mixture. The dissolved salt is uniformly dispersed across the whole salt water sample, making the salt water in the example above homogenous.

To know more about Homogeneous visit:

https://brainly.com/question/9192462

#SPJ4

Molecules are called autocrine regulators if they act on the same cell type as the one that produced them, while paracrine regulators, particularly if they are produced by one cell type, can regulate neighboring cells of the same organ.

In this review, the term "autocrine signalling" will be used to describe signals secreted by a cell that may bind to that cell or to a nearby cell with a similar phenotype, whereas the term "paracrine signalling" will be used to describe signals produced by a cell that that cell type cannot respond to but that other cell types can.

A paracrine ligand is a tool to spread the message from one cell type to the others, whereas an autocrine signal acts as an amplifier or a brake for message transmission. Multiple GPCR subtypes that are expressed in various cell types have been found to be capable of recognising a wide variety of ligands.

To know more about autocrine regulation, refer to the following link:

https://brainly.com/question/24468886

#SPJ4

If 5 mole no2 react with 1 mole h2o, then 4  moles of the excess reactant (N2O) remains when the reaction is complete

N2O + H2O → 2 HNO

1 mole of N2O reacts with 1 mole of H2O.

if 5 mole N2O reacts with 1  mole of H2O, then 4 mole of mole N2O remains, thus concludes  N2O is excess reactant.

A balanced chemical equation's molar amounts of the reactants and products are displayed. In the real world, reactants are rarely combined in precisely the right ratio. One reactant will completely exhaust before the others. A reaction's limiting reactant is the one that is used up first. Once the other reactants have been consumed to some extent, the remaining amount is considered "in excess."

To determine which reactant is the limiting one, determine the volume of the product that each reactant produced. The reactant with the lowest product yield is the limiting reactant.

To know more about excess reactant visit : brainly.com/question/11848702

#SPJ4

Reflux is a laboratory method for heating a mixture without losing a lot of solution. Refluxing a mixture is used to hasten and/or induce a reaction.

Reflux is used to achieve stage-by-stage equilibrium heat and mass transfer, which leads to the purification of the top product, by bringing down-flowing liquid in the rectification section into contact with the up-flowing vapor.

Learn more about the equilibrium

https://brainly.com/question/16051313

#SPJ4,

The hydrogen atoms are in the first excited state at room temperature.

The hydrogen atom is the best of all atoms: it consists of a single proton and a single electron. in addition to the most not unusual shape of the hydrogen atom, which is known as protium,  other isotopes of hydrogen exist in deuterium and tritium.

A hydrogen atom is an atom of the chemical detail hydrogen. The electrically impartial atom consists of an unmarried definitely charged proton and a negatively charged electron bound to the nucleus via the Coulomb force. Atomic hydrogen constitutes about seventy five% of the baryonic mass of the universe.

Hydrogen, H, is a pretty flammable gasoline and the maximum commonplace aspect of the universe. it is the lightest element ever and is colorless, odorless, and tasteless. it's also in maximum organic compounds.

Learn more about hydrogen atoms here:-https://brainly.com/question/708413

#SPJ4

Net ionic equations for the formation of each of the precipitates observed:

Cl⁻ + Ag⁺ → ClAg ↓

CO₃⁻² + Ca²⁺  →  CaCO₃ ↓

CO₃⁻² + Cu²⁺  →  CuCO₃ ↓

What is precipitation?

To know more about precipitation in chemical equations, click the link given below:

https://brainly.com/question/18109776

#SPJ4

It all happens due to VSPER model and the lone pair decreases the bond angle between bonding pairs of atoms.

The Lewis electron-pair technique identifies which atoms have lone pairs of electrons and can be used to forecast the number and types of bonds that will exist between the atoms in a substance. However, this method offers little insight into how atoms are actually arranged in space. The valence-shell electron-pair repulsion (VSEPR) model, which can be used to predict the shapes of many molecules and polyatomic ions, is introduced as we continue our discussion of structure and bonding. However, keep in mind that the VSEPR model, like any model, is only a partial representation of reality; it doesn't reveal bond lengths or the existence of multiple bonds.

Learn more about VSEPR model here:

https://brainly.com/question/29022281

#SPJ4

Answer:

If the atom is neutral, then the number of protons(atomic number) equals the number of electrons. If the atom is an ion and has a charge, then that changes. If the charge is negative(ex. 1-), then you add that number to the number of protons to get the number of electrons. If the charge is positive, then you subtract(ex 1+) that number from the number of protons to get the number of electrons

Explanation: