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Answer:

400 meters

Explanation:

Distance is the amount traveled. It doesn't matter if the runners start and end in the same place for distance, they still travel 400 meters.

The Precipitate formed is of CdS and the ions remaining are Na+ and NO3-.

The complete balanced chemical reaction is as follows:

Cd(NO3)2 + Na2S → CdS + 2NaNO3

Precipitation in an aqueous solution is the process of converting a dissolved component into an insoluble solid from a supersaturated solution. The precipitate is the solid that forms. In chemistry, a solid generated by a change in a solution, usually owing to a chemical reaction or a temperature shift that reduces the solubility of a solid.

A chemical may precipitate when its concentration exceeds its solubility. This can be caused by temperature fluctuations, solvent evaporation, or solvent mixing. A severely supersaturated solution precipitates more quickly.

A chemical reaction can result in the development of a precipitate. A white precipitate of barium sulphate is created when a barium chloride solution combines with sulphuric acid.

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a. The acid on the left is H₂O and its conjugate base on the right is OH⁻.

b. The base on the left is HONH₂ and its conjugate acid on the right is HONH₃⁺.

Chemical reactions between acids and bases always produce its conjugate base and its conjugate acid. According to Bronsted-Lowry

HONH₂ + H₂O ⇄ HONH₃⁺ + OH⁻

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Starch is a covalent compound because no ions is present in it.

A covalent bond is made from the mutual sharing of one or more pairs of electrons between two atoms. These electrons in a covalent bond are simultaneously attracted by the two atomic nuclei. A covalent bond is formed when the difference between the electronegativities of two atoms is too small for an electron transfer to occur and to form ions.

Starch is composed of long chains of glucose molecules that are bonded together through covalent bonds called glycosidic bonds. As starch contains covalent bonds it it, so it is a covalent compound.

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The freezing point of a solution of 15.0 g NaCl (sodium chloride) and 250 g water is -4.4°C.

Freezing point is the tempreture at which a liquid turns into a solid. It is the temperature it is the molecules of liquid stop moving really and start to format solid crystal structure.
This is because the freezing point depression of a solution is proportional to the molality of the solute. The molar mass of NaCl is 58.44 g/mol, so the solution has a molality of 0.25 m. Using the formula for freezing point depression, ΔTf = i Kf m, where i is the van't Hoff factor (2 for NaCl), Kf is the freezing point depression constant (1.86°C/m), and m is the molality, we can calculate that the freezing point depression of this solution is 0.46°C, resulting in a freezing point of -4.4°C.
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Since the number of hybrid orbitals equals the number of atomic orbitals, 4 hybrid orbitals are created by combining 4 atomic orbitals of the same atom.

Thus, four hybrid orbitals with a tetrahedral structure will be formed by the 1 s and 3 p orbitals.

The process of hybridization is the mixing of atomic orbitals with the same energy levels to create an equal number of new hybrid orbitals. This mixing typically produces hybrid orbitals with completely distinct energies, geometries, etc.

When two atomic orbitals in a molecule combine to generate a hybrid orbital, the energy of the orbitals of the individual atoms is redistributed to give orbitals of equivalent energy. Hybridization is the name of this procedure.

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Answer:

c. colour

other options will have effect on the bottle

Protons All Elements' Neutrons & Electrons (List + Images) Atomic number: all protons, neutrons, and electrons 5 Boron is made up of 5 protons, 6 neutrons, and 5 electrons.

6 Carbon consists of 6 protons, 6 neutrons, and 6 electrons. Protons, neutrons, and electrons total seven for nitrogen. Oxygen contains 8 protons, 8 neutrons, and 8 electrons. 34 more rows

Protons All Elements' Neutrons & Electrons (List + Images) 1 Atomic number All Elements Have Two Electrons. Diagram of 3 Shells 4 Neon Magnesium (5) Aluminum 6 Phosphorus 7 Sulfur 8 9 Argon Potassium 10 More things...

All elements' protons, neutrons, and electrons Diagram of a shell One proton, zero neutrons, and one electron make up hydrogen. Helium contains two protons, two neutrons, and two electrons.

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The enthalpy changes for each of the following reactions are:

The difference between total reactant and total product molar enthalpies estimated for substances in their standard states is the standard enthalpy of reaction for a chemical process. The quantity of heat evolved or absorbed in a process under constant pressure is referred to as enthalpy change. It is assigned the symbol ΔH, interpreted as "delta H".

Enthalpy is the product of internal energy and pressure multiplied by volume. We can't measure a system's enthalpy, but we can look at variations in enthalpy. The sum of internal energy (U) and the product of pressure (P) and volume (V) equals enthalpy (H) (V). The system's heat added or lost is quantified as a change in enthalpy (H), not the actual amount of heat.

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After solving the equation the Molecular mass is 254 s is the answer.

What is Molecular mass?

Molecular mass is the sum of the atomic masses of all the atoms present in a molecule. It is an important property of molecules that is used in determining the chemical and physical properties of the molecule. Molecular mass is usually expressed in units of atomic mass units (amu) or daltons (Da). It is important to note that the molecular mass of a compound is not necessarily equal to the sum of the atomic masses of its constituent atoms, as the atoms in a molecule may be bound together by covalent bonds, which can alter their individual masses. Molecular mass can be calculated by adding the masses of the individual atoms present in the molecule. This value can be used to determine the identity of the molecule and its properties. Additionally, the molecular mass of a compound can be used to calculate the molar mass of the compound, which can be used to calculate the amount of a substance present in a given volume.

First we calculate,

Molecular mass of propane C3H8

= 3 x 12 + 1 x 8

= 44 gm/ml

Now, calculate amount of propane, c3h8, to effuse through the same orifice under the same conditions:-

[tex]t_{N2}[/tex]/[tex]t_{C3H8}[/tex] = [tex]\sqrt{28 gm/ml/ 44gm/ml}[/tex]

               = 0.49

[tex]t_{C3H8}[/tex] = 125 s/0.49

         = 254 s is the answer.

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A substrate in biology can be either a chemical that an enzyme can operate on or the surface that an organism (such as a plant, fungus, or animal) lives on. A substrate in geology is the surface of a rock or sediment where chemical and biological processes take place.

Geology describes it as the layer of rock or other elements that lies beneath the soil. For instance, a page is a substrate for ink to stick to, rock is a substrate for fungi, and NaCl is a substrate for a chemical reaction. The basic material on which processing is carried out is referred to as the substrate in the fields of materials science and engineering. This surface might be employed to create new films or material layers, like deposited coatings. It might serve as the foundation for the bonding of paint, adhesives, or sticky tape.

The substrate in biochemistry is a molecule that an enzyme reacts with. Chemical processes involving the substrate are catalyzed by enzymes (s). One or more products are created from the substrate, and they are then released from the active site. After that, another substrate molecule can be taken up by the active site.

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The enzymatic cycle has four steps, and they include the following;

1. The reaction between the Enzyme and Substrate

2. The substrate/enzyme complex formation

3. Catalysis

4. Enzyme releases a product

A small molecule will attach to the enzyme's active site and stop the action. The plants adapt by changing amino acid(s) in the enzyme. They adjust the structure and are continuously active; the small molecule cannot limit this enzyme.

The four steps in an enzyme cycle are;

1. The substrate and enzyme are found in one region. There are times when there is more than one substrate molecule and the enzyme changes.

2. The enzyme will then be trapped on the substrate in the special region called the active site. The combination is called substrate/enzyme complex. The active site will be in a shaped special region for the enzyme, which fits around a substrate.

3. Catalysis will happen when the Substrate changes. It can be broken down or combined with other molecules forming something new. It will break and form chemical bonds; afterward, a product/enzyme complex will occur.

4. The enzyme will release a product. When the enzyme is relaxed, it will return to its original shape and be ready to work on the other substrate molecule.

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Answer: two;ideal;identical

Explanation:

The angle between two bonds on the same atom is known as the bond angle. It varies according to the number of lone pairs, hybridization, atom repulsion, and each atom's electronegativity.

The geometric angle formed by two adjacent bonds is known as a bond angle. Simple molecules can take on a variety of forms, such as: Atoms are connected in a straight line in a linear model.

The number of lone pairs an atom contains frequently influences the bond angle. In the case of an atom with no lone pairs, the form is trigonal planar, and the bond angle is 120°. The molecule has a 118 bond angle and one lone pair that generates a bent shape.

Therefore, We predict that the two zones of electron density will align themselves with a 180° bond angle on either side of the centre atom using the VSEPR theory.

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To solve this type of question we must know the concept of rate law. Therefore, 8.242g will be left after 32 days. The kinetic for the decay of Plutonium is of first order kinetics.

There are two kinds of rate law in chemical kinetics one is differential rate law and other is integrated rate law.

The rate law for first order kinetics is

K=(2.303/T)×log(a/a-x)

half life=0.693/K

Where

k - rate constant

t - time passed by the sample

a - initial amount of the reactant

a-x - amount left after the decay process

K=0.693/half life

K=0.693/ 8

 =0.086

0.086=(2.303/ 32)×log( 136/a-x)

0.086=0.07×log( 136/a-x)

1.22=log( 136/a-x)

136/a-x=16.5

a-x=8.242g

Therefore, 8.242g will be left after 32 days.

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In 1941, gold was created by neutron bombardment from mercury, but the isotopes were all radioactive.

What is neutron irradiation? When a high-energy neutron bombards a nucleus to start nuclear fission, more neutrons are released during the process. A neutron has no charge, thus when it is pointed at the nucleus, it is not repulsed.

When uranium-235 is irradiated with neutrons, the uranium atoms split, releasing heat and atoms with decreasing atomic numbers as well as more neutrons. Similar to typical fossil fuel power plants, this process, known as fission, may harness the heat produced to produce electricity.

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We are aware that one Avogadro constant (N a=6.022*1023; Na =6.022*1023 ) equals one mole of any substance. Since MM=197 g/mol --> n= 8.87 g/197 g/mol 0.450*10-2 mol in this instance.

Determine the substance's molecular weight in units of one mole, then divide the molar mass value by the molecular mass, and multiply the result by the Avogadro constant to get the required number of molecules.

Auric chloride (AuCl3) and chloroauric acid are the most prevalent gold compounds (HAuCl4). Aqua regia is a solution made by combining one component of nitric acid with three parts of hydrochloric acid (because it dissolved gold, the King of Metals).

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Answer:

Study 'atom'

Explanation:

atoms are in the building blocks for molecules. the atom has protons and neutrons in its nucleus and electrons revolving around it. An atom can survive in its surrounding by either sharing electrons or by transferring electrons. Protons are positively charged and electrons are negatively charged. They are also called subatomic particles. When atoms lose electrons they get positively charged, and when they gain electrons they get negatively charged. When a metal is reacting with a non-metal, the metal is positively charged and transports an electron to the non-metal. The metal becomes positively charged and the nonmetal becomes negatively charged. the metal becomes the cation and the nonmetal becomes the anion. Thus, reactivity can cause gain or loss of charges.

So that is base. However, this base (CH 3COO) is actually a derivative of the acid (CH 3COOH), which is why CH 3COO is an acid's conjugate base. What distinguishes a conjugate base from an acid hbr?

H2CO3 is the conjugate acid. acid carbonate. What is CH3COO's conjugate acid? The conjugate acid for the acetate ion is acetic acid. What is the CH3COO- conjugate acid? What does the term conjugate base mean? An acid's conjugate base is what is left over after the acid has contributed its proton. Example: HX is the acid, and X- is the conjugate base. An acid's conjugate base is what is left over after the acid has contributed its proton.  Acid is HX, while base is conjugate.

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The freezing point of the solution is -3.53°C.

The Chemical equation of the HBr is -

              HBr → H⁺ + Br ⁻

Initial -     1         0      0

Final -      1-α     α       α

The total moles = 1 - α + α + α

                          = 1 + α

half factor = i = Total mol / Initial mol

                      = 1 + α / 1

                      = 1 + α

Now, Evolution in freezing point

                         ΔT f = i Kf m

                          kf = 1.86                                                (given)

   m(molality = mass of solute / solvent (Kg))

                        Δ T f  = (1 + α) × 1.86 × (mass/molar mass ) / solvent

   [ α = 90/100 = 0.9 because 90% ionised]

  putting the values in above equation -

                           = (1 + 0.9) × 1.86 × (8.1 × 1000) / 81 × 100(gm)

                              ΔT = 3.53°C

    Then freezing point T f =  T° f - ΔT

                            = 0 - 3.53°C

                           T f = -3.53°C

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Complete Question -

What is the freezing point of a solution containing 8.1 g HBr in 100gm. water assuming the acid to be 90% ionised:

[Kf for water =1.86Kmolarity^−1 ]

After solving the equation benzene is 2.698 kg is the correct answer.

Description of the answer

1 day = 24 hrs = 24×60 minute = 1440 minutes

concentration of benzene in groundwater = 5 mg/l

100 gallon = 378.541 L

100 gallon/minute = 378.541 L/minute

100 gallon (378.541 l) benzene contaminated groundwater is being pumped per minute, therefore the volume of groundwater being pumped in one day (i.e. 1440 minutes) = (378.541 × 1440) l = 545099.04L

Since 1 l groundwater is contaminated with 5 mg benzene, therefore 545099.04 l groundwater is contaminated with = (545099.04 × 5) mg = 2725495.2 mg = 2725.495 g = 2.725 kg

Thus, 545099.04 l groundwater is pumped per day, which contains a total of 2.725 kg benzene as contamination.

Since 99% benzene from groundwater has to be removed, therefore benzene waste (kg) needed to be treated per day = (2.275 × 99 / 100) kg = 2.698 kg.

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Electron geometry is provided by four electron pair pairs. The lone pair would have molecular geometry and would result in lone pair-bonded pair repulsions.

Tetrahedral geometry is the four-electron pair geometry.

Trigonal bipyramidal geometry with a four-electron pair and a single pair

(b). Electron geometry is created by five pairs of electrons. In order to reduce lone pair-bonded pair repulsions, the lone pair occupies an equatorial position, and the molecule would have molecular geometry.

Trigonal bipyramidal geometry is the five-electron pair's geometry.

See-saw geometry is the geometry with a five-electron pair and a single pair.

(c). The geometry of the electron is made up of six pairs. To reduce lone pair-lone pair repulsions, the two lone pairs would be in opposing locations, and the molecule would have molecular geometry.

Octahedral geometry is the geometry with the six electron pairs.

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Yes, Scope 3 emissions include emissions that are a result of a Customer's activities but are not under its direct control.

These emissions can be caused by a wide range of activities, such as the use of products and services by customers. Therefore, customers' GHG emissions from using a company's products or services would be included in the company's Scope 3 emissions. For example, if a car manufacturer includes the GHG emissions from the use of its cars by customers in its Scope 3 emissions, this would include the emissions from the fuel burned by the customers while driving the cars.

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When there is a separation of charge, dipole moments happen. Dipole moments, which result from variations in electronegativity, can happen between atoms in a covalent link or between two ions in an ionic bond.

The dipole moment increases with the difference in electronegativity. The size of the dipole moment is also affected by the distance between the charge separations. The polarity of the molecule is determined by the dipole moment. A dipole moment is produced when electrons are distributed unevenly among atoms in a molecule. This happens when one atom possesses a lone pair of electrons and the difference in electronegativity vector points in the same direction, or when one atom is more electronegative than another, causing that atom to pull more strongly on the shared pair of electrons. The water molecule, which consists of one oxygen and two hydrogen atoms, is one of the most prevalent instances. Each hydrogen has a partial positive charge, while oxygen has a partial negative charge due to variances in electronegativity and lone electrons.

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The given image represents the deletion kind of mutation. Therefore, option (A) is correct.

In genetics, a deletion can be described as a mutation in which a part of a chromosome or a sequence of DNA is left while DNA replication. From a single base to an entire piece of chromosome any number of nucleotides can be deleted.

Some chromosomes have weak spots where breaks take place which results in the deletion of a part of the chromosome. The separation can be induced by heat, viruses, radiation, and chemicals. When a chromosome breaks, the missing piece of a chromosome is known as deletion.

The single base deletion mutations take place by a single base flipping in the template DNA, followed by DNA strand slippage.

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The oxygen atom in the water molecule has two lone pairs, one of which could be used to form a bond with a proton and, therefore, the water molecule could act as a base in a reaction. Since water has the potential to act both as an acid and as a base, water is amphoteric.

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NaCl, as an electrolyte, dissociates almost completely to give 'Na(+) and Cl(-)' ions, whereas glucose, as a non-electrolyte .

A solute's freezing point is completely based on its concentration, not on its mass or chemical composition. A typical instance of freezing point depression is when salt reduces the freezing point of water in cold weather.

Frost point When solute molecules are added to a solvent, a colliding phenomenon known as depression results.

As a result, the freezing temperatures of all solutions are lower than those of pure solvents and are inversely related to the solute's molality.

study the freezing point.

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The classification of each protein is:

Proteins are essential macromolecules for human health, playing a vital role in the functioning of the human body. From hormones and enzymes to structural proteins and antibodies, proteins are the building blocks of life and are involved in a wide range of biological processes. In this essay, the importance of proteins in human health will be discussed, focusing on their four main functions:

Hormones are proteins that regulate various physiological processes in the body. Insulin, for example, is a hormone that is essential for glucose utilization in the human body. Without insulin, glucose cannot be metabolized and utilized properly, leading to serious health issues such as diabetes.

Enzymes are proteins that catalyze biochemical reactions in the body. Lipases, for example, are enzymes that hydrolyze lipids, which are essential for the digestion of food. Without lipases, the body would not be able to properly digest and absorb the essential nutrients from food.

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K2SO4 has the most ions out of the options, which means its freezing point will degrade the most.

Which aqueous solution with a concentration of "0.1 M" will have the lowest freezing point

UThe answer is "K 2SO 4" ionises to produce three ions, increasing the effective molality of the solution by three times. Its freezing point is therefore the lowest.

Since 1M glucose solution does not go through dissociation to produce more particles, it has a lower  

which results in a higher freezing point

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The IR spectrum of ethene is rather simple due to its simple structure.

The interpretation of infrared spectra involves the connection of absorption bands in the spectrum of an unknown composite with the known absorption density for types of bonds,

The right-hand part of the infrared spectrum of ethane, wavenumbers ~1500 to 400 cm-1 is examined in the fingerprint region. This is a very neat tool for interpreting IR spectra.

So we can conclude that Interpretation of the infrared spectrum of ethene​​ There are osmosis bands at ~1400 cm-1 due to scissoring H-C-H vibrations and ~3100 cm-1 from H-C-H

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For work to be accomplished, an object must move in the same direction as the applied force.

Work in physics refers to the measure of energy expended in moving an object; most commonly, force times distance.

It is said that no work is done if the object does not move. When a force acts upon an object to cause a displacement (directional distance) of the object, it is said that work was done upon the object.

In order for work to be done, the object must move in the same direction as the force being applied to it.

Applied force is the force which is applied to an object by another object. For example, a person pushing a barrel is an example of applied force. When the person pushes the barrel then there is an applied force acting upon the barrel.

Therefore, the correct answers have been inserted into the blank in the main answer section.

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