In an exothermic reaction, chemical energy is converted to

1.thermal
2. mechanical

Answer:

3, 1, 3, 1 is a required answer.

A. the pressure exerted by 1.00 mol Cl2 confined to 3.00 L at 25°C is 8.12 atm. The answer to part a) is 8.12 atm.

B. the pressure exerted by 1.00 mol Cl2 confined to 3.00 L at 25°C is 8.12 atm. The answer to part a) is 8.12 atm.

C.  the difference between the result for an ideal gas and that calculated using the van der Waals equation is greater when the gas is confined to 3.00 L compared to 22.4 L.

a) Use the ideal gas equation:

The ideal gas equation is given by PV = nRT, where

P = pressure of gas

V = volume of gas

n = number of moles of gas

R = gas constant

T = temperature of gas

The pressure exerted by 1.00 mol Cl2 confined to a volume of 3.00 L at 25°C can be calculated using the ideal gas equation. The gas constant R in this equation is 0.0821 L atm/mol K (since volume is in liters and pressure is in atmospheres).

n = 1.00 mol

R = 0.0821 L atm/mol K

P = ?

V = 3.00 L (Volume)

T = 25 + 273 = 298 K (Temperature)

We can solve for P:

PV = nRT

P = (nRT) / V = (1.00 mol)(0.0821 L atm/mol K)(298 K) / (3.00 L)

P = 8.12 atm

Thus, the pressure exerted by 1.00 mol Cl2 confined to 3.00 L at 25°C is 8.12 atm. The answer to part a) is 8.12 atm.

b) Use van der Waals equation for your calculation:

The van der Waals equation is given by

(P + a(n/V)^2)(V - nb) = nRT

where a and b are van der Waals constants that depend on the gas. Values for the van der Waals constants are a = 6.49, b = 0.0562.

Using these values, we can calculate the pressure exerted by 1.00 mol Cl2 confined to a volume of 3.00 L at 25°C. The van der Waals constant R in this equation is 0.0821 L atm/mol K.

n = 1.00 mol

R = 0.0821 L atm/mol K

(P + a(n/V)^2) = nRT / (V - nb)

P = nRT / (V - nb) - a(n/V)^2

P = (1.00 mol)(0.0821 L atm/mol K)(298 K) / (3.00 L - (1.00 mol)(0.0562 L/mol)) - 6.49 atm (1.00 mol / (3.00 L)^2)

P = 7.73 atm

Thus, the pressure exerted by 1.00 mol Cl2 confined to a volume of 3.00 L at 25°C, as calculated using the van der Waals equation, is 7.73 atm. The answer to part b) is 7.73 atm.

c)The ideal gas law assumes that gas molecules have zero volume and do not interact with each other. The van der Waals equation accounts for non-ideal behavior by including the volume and attractive forces of gas molecules.

When a gas is confined to a small volume, the volume occupied by the gas molecules becomes more significant, and the attractive forces between molecules become stronger.

Thus, the difference between the result for an ideal gas and that calculated using the van der Waals equation is greater when the gas is confined to 3.00 L compared to 22.4 L.

To learn more about pressure, refer below:

https://brainly.com/question/30673967

#SPJ11

Answer:

D

Explanation:

Sweat glands remove waste

The correct association that lies between the structure and one of its functions is option D Sweat glands remove waste.

The sweat represents the fluid that comprises of mainly of water also there is much dissolved solid wastage that should be excreted via the sweat glands. It eliminates the excess water and salts also it served the function of colling the body at the time of thermoregulation.

Therefore, the option D is correct.

Learn more about structure here: brainly.com/question/18044803

Answer:

A. Mixture

Explanation:

Answer: a) \(H_3PO_4+3NaOH\rightarrow Na_3PO_4+3H_2O\)

b) \(PCl_3+3H_2O\rightarrow P(OH)_3+3HCl\)

c) \(2Al+3H_2SO_4\rightarrow Al_2(SO_4)_3+3H_2\)

Explanation:

According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side.

The balanced chemical equations are :

\(H_3PO_4+3NaOH\rightarrow Na_3PO_4+3H_2O\)

\(PCl_3+3H_2O\rightarrow P(OH)_3+3HCl\)

\(2Al+3H_2SO_4\rightarrow Al_2(SO_4)_3+3H_2\)

The molecular formula of the compound which has a molecular weight of 112.124 atomic mass units is C₆H₈O₂.

Molecular formula of any compound tells about the composition and numbers of each entities present in that molecule.

Steps involved in the prediction of molecular formula:

      Molar mass of C₃H₄O = 3(12) + 4(1) + 16 = 56

        112.124/56 = 2

        Molecular formula = (C₃H₄O)₂ = C₆H₈O₂

Hence correct option is (E).

To know more about molecular formula, visit the below link:
https://brainly.com/question/26388921

Answer:

Sand and silt can be carried in suspension.

Explanation:

For example, sand and silt can be carried in suspension in river water and on reaching the sea bed deposited by sedimentation; if buried, they may eventually become sandstone and siltstone (sedimentary rocks) through lithification.

You can use chemical formulas to determine if a change is either chemical or physical by looking for changes in the number and type of atoms in the reactants and products.

Learn more about chemical and physical at: https://brainly.com/question/11370755

#SPJ4

Answer:

The answer is 10

Explanation:

The chemical formula of aluminum chloride is AlCl₃ and the  chemical formula of aluminum oxide is Al₂O₃.

The chemical formula of aluminum chloride is written as;

Al³⁺  + Cl⁻   → AlCl₃

The chemical formula of aluminum oxide is written as;

Al³⁺  + O²⁻   → Al₂O₃

Thus, the chemical formula of aluminum chloride is AlCl₃ and the  chemical formula of aluminum oxide is Al₂O₃.

Learn more about chemical formula here: https://brainly.com/question/26388921

#SPJ1

Answer:

gg mate

Explanation:

When a piece of magnesium ribbon is dropped into Copper Sulfate Solution, magnesium is reactive metal than copper in Copper sulfate and Copper Metal it will displace copper forming magnesium Sulphate and copper metal.

Magnesium + Copper Sulphate ⇒ Magnesium Sulphakt Copper

My (s) + Cuso4 (aq) ⇒  Mg so4 lag + Cu(s).

When magnesium is put into a copper sulfate solution an oxidation-reduction reaction occurs, forming copper metal on the magnesium, and the dark blue color of the solution disappears. After a few minutes, hydrogen gas bubbles form on the surface usually with coils of magnesium ribbon floating on it.

The solution becomes lighter during the reaction and the blue color of the copper sulfate solution does not darken. Therefore option C is the correct answer. It should be noted that the reaction taking place here is a substitution reaction in which a more reactive metal displaces a less reactive metal.

Learn more about Chemical equations here:-https://brainly.com/question/26227625

#SPJ1

Here is the answer

I hope it helped you

The answer to the question is D. Appearance was of primary importance because of which Mortise-and-tenon joints were used in most 18th century timber framing

Mortise-and-tenon joints were commonly used in 18th century timber framing because they provided a strong and durable joint, but they also allowed for a clean and aesthetically pleasing appearance. While metal fasteners were scarce at the time, it was not the only reason for the use of this joint. The use of mortise-and-tenon joints was also a reflection of the craftsmanship and skill of the builders who wanted to create a lasting and visually appealing structure. Additionally, the tools needed to make mortise-and-tenon joints were readily available and could easily be produced with the primitive tools of the time.

To learn more about metal click here https://brainly.com/question/29404080

#SPJ11

decay rate of approximately 1.69x10^17 Bq (becquerels),

The decay rate of a radioactive sample is determined by the number  of radioactive atoms present and the decay constant, which represents the probability of decay per unit of time.

To calculate the decay rate, we multiply the number of atoms in the sample by the decay constant. In this case, the sample has 8.31x10^17 atoms and a decay constant of 0.203/s. Multiplying these values gives a decay rate of approximately 1.69x10^17 Bq (becquerels), which represents the number of decays per second in the sample.

Learn more about Oxygen here : brainly.com/question/13905823

#SPJ11

:

Select the correct answer. Which statement is always true about a reversible chemical reaction? A. The concentration of reactants is higher than that of the products. B. The products can form reactants, and the reactants can form products. C. The concentrations of reactants and products are not constant. D. The concentration of the products is higher than that of the reactants.

Answer:

number B.

Answer:

Plato / Edmentum  -  B

Explanation:

Answer:

Its chemical composition

According to the question 19.2 liters of NH3 at 32.6°C and 4.25 kPa is required to react completely with 30.0L of NO at STP.

STP (Standard Temperature and Pressure) is an important concept in the physical sciences. It is the reference state for temperature and pressure in which most measurements are made. In chemistry, STP is used as a reference state for calculating the physical properties of various substances. It is also used in thermodynamics to calculate the physical state of a system. STP is defined as 0 °C (273.15 K) and a pressure of 1 atmosphere (101.325 kPa).

According to the balanced equation, for every 6 moles of NO, 5 moles of NH3 is required. Therefore, we need to calculate the number of moles of NO first.

1 mole of gas at STP occupies 22. 4 liters, so 30.0 liters of NO at STP is equal to 30.0/22.4 = 1.34 moles of NO.

Since we need 5 moles of NH3 for every 6 moles of NO, we need 5/6 x 1.34 = 1.12 moles of NH3.

At 32.6°C and 4.25 kPa, 1 mole of NH3 occupies 17.1 liters, so 1.12 moles of NH3 is equal to 1.12 x 17.1 = 19.2 liters of NH3.

Therefore, 19.2 liters of NH3 at 32.6°C and 4.25 kPa is required to react completely with 30.0L of NO at STP.

To learn more about STP

https://brainly.com/question/27100414

#SPJ4

The general properties of matter result from its relationship with mass and space. ... Because it occupies space, all matter has volume and impenetrability, since two objects cannot occupy the same space simultaneously.

The overall equation for the reaction of neutralization is NaOH + HCl → H2O and NaCl.

A neutralization reaction is a type of reaction n which an acid and a base react to form water and a salt. This involves the combination of Hydrogen ions and hydroxyl ions in order to form water. The neutralization reaction of a strong acid and strong base has a pH equal to value 7.

Neutralization is defined as a type of chemical reaction in which an acid reacts with a base forming salt and water. For example, Reaction between hydrochloric acid and sodium hydroxide to produce salt i.e. sodium chloride and water.

So we can conclude that NaOH + HCl → H2O and NaCl.

Learn more about reaction here: https://brainly.com/question/11231920

#SPJ1

The controls in this set-up would be the position of the lens in relation to the light beam and the distance of the lens from the screen because Lidia intends to measure the location where the light beam is focused. This is so that only the thickness of the lens needs to be changed, not the position.

The controls in Lidia’s investigation:

1) The thickness of the lens is the independent variable because the investigation's goal is to ascertain how one variable influences another.

In order to determine the effect on the dependent variable afterward, Lidia must experiment with a variety of thicknesses.

2) Because the goal of the investigation is to ascertain how a light beam is focused, this point is the dependent variable. As a result, she has no control over this point and will instead only monitor and measure how it responds to changes in the independent variable.

Lidia must confirm that no other factors are influencing the outcomes or output before drawing a decision.

To know more about lens and their thickness visit:

https://brainly.in/question/21772634

#SPJ1

The allowed energies and wave functions for a particle in a ring provide a theoretical basis for the stability and special properties of aromatic compounds, which follow Hückel's rule of having (4n + 2) pi electrons.

The allowed energies for a particle in a ring are described by the equation E = N²h²/2mL², where E is the energy, N is an integer (0, +/-1, +/-2...), h is Planck's constant, m is the mass of the particle, and L is the circumference of the ring. This equation is derived from the quantization of angular momentum in quantum mechanics.
In order for a ring system to be aromatic, it must have (4n + 2) pi electrons, according to Hückel's rule. This rule is based on the molecular orbital theory, where pi electrons form delocalized molecular orbitals in a cyclic conjugated system. When a ring system follows Hückel's rule, it exhibits enhanced stability and special chemical properties, which are characteristic of aromatic compounds.
The allowed energies and wave functions for a particle in a ring can be used to justify this observation because they help explain the stability of aromatic systems. When a ring system has (4n + 2) pi electrons, the energy levels of these electrons are lower than those of non-aromatic systems. Lower energy levels indicate increased stability, as the electrons are in a more stable state.
Additionally, the wave functions of the particles in an aromatic ring system are symmetric and delocalized, allowing for better overlap between adjacent p orbitals. This delocalization leads to a continuous distribution of electron density around the ring, further contributing to the stability and unique properties of aromatic compounds.
To know more about energies visit:

https://brainly.com/question/1932868

#SPJ11

In the redox reaction represented by the cell notation sn(s) | sn2(aq) || ag(aq) | ag(s), the oxidizing agent is the species that gets reduced. In this case, the silver ions (Ag+) are being reduced to silver atoms (Ag). Therefore, the oxidizing agent is the silver ions.

To determine the oxidizing agent, you need to identify the species that undergoes reduction. In the given reaction, silver ions gain electrons to form silver atoms. This reduction process indicates that the silver ions are accepting electrons and are acting as the oxidizing agent.

In a redox reaction, the oxidizing agent is always the species that gets reduced, as it accepts electrons from the reducing agent. This transfer of electrons between species is what drives the redox reaction.

To know more about oxidizing agent visit:-

https://brainly.com/question/29137128

#SPJ11

Dehydration synthesis reactions build molecules up and generally require energy, while hydrolysis reactions break molecules down and generally release energy. Carbohydrates, proteins, and nucleic acids are built up and broken down via these types of reactions, although the monomers involved are different in each case

Answer:

Dehydration synthesis reactions build molecules up and generally require energy, while hydrolysis reactions break molecules down and generally release energy. Carbohydrates, proteins, and nucleic acids are built up and broken down via these types of reactions, although the monomers involved are different in each case.

Explanation:

Answer:

A. volume

Explanation:

Generally the equation for the  ideal gas  is mathematically given as  

PV=nRT

Where  

P=pressure  

V=volume  

R=gas constant  

n=Number of Moles  

T=Temperature

Therefore  

V=nRT/P  

Option A

For more information on this visit

brainly.com/question/17756498

Molarity

Chemists primarily need the concentration of solutions to be expressed in a way that accounts for the number of particles that react according to a particular chemical equation. Since percentage measurements are based on either mass or volume, they are generally not useful for chemical reactions. A concentration unit based on moles is preferable. The molarity (M) of a solution is the number of moles of solute dissolved in one liter of solution. To calculate the molarity of a solution, you divide the moles of solute by the volume of the solution expressed in liters.

Note that the volume is in liters of solution and not liters of solvent. When a molarity is reported, the unit is the symbol M and is read as “molar”. For example a solution labeled as 1.5 M NH 3 is read as “1.5 molar ammonia solution”.

Sample Problem: Calculating Molarity

A solution is prepared by dissolving 42.23 g of NH 4 Cl into enough water to make 500.0 mL of solution. Calculate its molarity.

Step 1: List the known quantities and plan the problem.

& underline{text{Known}} &&underline{text{Unknown}} \& text{mass}=42.23 text{g} NH_4Cl && text{molarity}= ? text{ M}\& text{molar mass} NH_4Cl=53.50 text{g} / text{mol} \& text{volume solution}=500.0 text{mL}=0.5000 text{L}

The mass of the ammonium chloride is first converted to moles. Then the molarity is calculated by dividing by liters. Note the given volume has been converted to liters.

Step 2: Solve.

42.23 text{ g } NH_4Cl times frac{1 text{ mol } NH_4Cl}{53.50 text{ g } NH_4Cl} &= 0.7893 text{ mol } NH_4Cl\frac{0.7893 text{ mol } NH_4Cl}{0.5000 text{ L}} &= 1.579 text{ M}

Step 3: Think about your result.

The molarity is 1.579 M, meaning that a liter of the solution would contain 1.579 mol NH 4 Cl. Four significant figures are appropriate.

In a laboratory situation, a chemist must frequently prepare a given volume of solutions of a known molarity. The task is to calculate the mass of the solute that is necessary. The molarity equation can be rearranged to solve for moles, which can then be converted to grams. See sample problem 16.3.

Sample Problem:

A chemist needs to prepare 3.00 L of a 0.250 M solution of potassium permanganate (KMnO 4 ). What mass of KMnO 4 does she need to make the solution?

Step 1: List the known quantities and plan the problem.

Known

molarity = 0.250 M

volume = 3.00 L

molar mass KMnO 4 = 158.04 g/mol

Unknown

mass KMnO 4 = ? g

Moles of solute is calculated by multiplying molarity by liters. Then, moles is converted to grams.

Step 2: Solve.

text{mol KMnO}_4 = 0.250 text{ M KMnO}_4 times 3.00 text{ L} &= 0.750 text{ mol KMnO}_4\0.750 text{ mol KMnO}_4 times frac{158.04 text{ g KMnO}_4}{1 text{ mol KMnO}_4} &=119 text{ g KMnO}_4

Step 3: Think about your result.

When 119 g of potassium permanganate is dissolved into water to make 3.00 L of solution, the molarity is 0.250 M.

Because potatoes already contain sugar, less water will evaporate when they are submerged in sugar water. Because it will absorb water, the slice placed in water will become hard.

Answer:

-

Explanation:

Since potatoes already contain sugar, less water will diffuse out of the potato placed in sugar water. The slice placed in water will be rigid, since it will absorb water.

The molar mass of vitamin if it contains 4.34% of cobalt is 1358 g/mole.

Molar mass is the mass of 1 mole of the compound.One mole of compound contains Avogadro's number of molecules.So,molar mass is mass of Avogadro's number of molecules.

Molar mass is also defined as mass of the sample divided by the amount of substance, measured in moles .It is a bulk quantity not a molecular property of substance. The SI unit of molar mass is kilogram per mole.

In this problem,vitamin has 1 cobalt atom .The atomic mass of cobalt is 58.93 g/mole.So according to the definition,mass of 1 mole of cobalt is 58.93 g =4.34% mass of 1 mole of vitamin.

To find 100% mass of 1 mole of vitamin

58.93/4.43×100=1358 g

Hence,the molar mass of vitamin is 1358 g.

To learn more about  molar mass click here:

https://brainly.com/question/13152455

#SPJ1

The process of spectroscopy determines a substance's physical or chemical identity with as near absolute certainty as existing analytical techniques will permit.

Spectroscopy is the study of the interaction of electromagnetic radiation with matter and is a crucial tool in chemical analysis. By studying the spectrum of a substance (the way it absorbs, emits, or reflects light), spectroscopy can provide information about the composition, structure, and properties of the substance, thereby allowing for its identification with high accuracy.

Spectroscopy is a broad and interdisciplinary field that encompasses many different techniques for studying the interaction of electromagnetic radiation with matter. It plays a crucial role in various areas of science, including physics, chemistry, biology, and materials science. Spectroscopy provides information about the composition, structure, and properties of substances by analyzing the way they interact with light.

Learn more about spectrum here:

https://brainly.com/question/6836691

#SPJ4

Answer:

4.97097

Explanation:

You traveled 4.97097 mph.

The correct color match to the above questions relating to balanced chemical equation and conservation of mass are as follows:

A chemical equation is a symbolic representation of a chemical reaction; reactants are represented on the left, and products on the right.

A chemical equation is said to be balanced when the number of atoms of each element on both sides of the equation is the same.

A chemical equation is balanced using coefficients, which are numbers placed in front of formulas to balance equations.

The law of conservation of mass states that the total mass of a closed system remains constant regardless of the chemical or physical changes that take place within it. This means that in a chemical reaction, the number of atoms of the reactants and products must be the same.

Based on the above, the answers to the questions in the image are included in the main answer part.

Learn more about law of conservation of mass at: https://brainly.com/question/13383562

#SPJ1