i need help on this question look at attachment

The cell potential is  - 0.00072V

The Nernst equation is an electrochemical equation that describes the voltage (electromotive force) produced by a galvanic cell, as a function of the cell potential relative to its standard state, temperature and the activities of the reactants and products

If we apply the Nernst equation to the problem that we have here and then we try to obtain the cell potential of the cell as we can see in the image that have been shown in the attachment then we would have that;

Ecell =Eocell - 0.0592/2 logQ

Then;

Ecell = 0 - 0.0592/2 log(0.811/0.858)

Ecell =  - 0.00072V

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The concentrations of the other species at equilibrium is 5.1 x 10⁻²M.  If this state is not disturbed by an external force, it will persist unbrokenly.

In physics, a system is said to be in equilibrium when neither it internal energy state nor its state of motion tend to vary over time. If a simple mechanical body experiences either accelerometers nor rotational acceleration, it is thought to be in equilibrium. If this state is not disturbed by an external force, it will persist unbrokenly.

2N[tex]_2[/tex]O (g) ⇌ 2N[tex]_2[/tex](g) + O[tex]_2[/tex](g)

Keq = [N[tex]_2[/tex]]² [ O[tex]_2[/tex]] /[N[tex]_2[/tex]O]²

substituting all the given values in the above equation, we get  

7.3 x 10³⁴= X³/1.4 x 10⁻²

X=5.1 x 10⁻²M

Therefore, the concentrations of the other species at equilibrium is 5.1 x 10⁻²M.

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Option 4 is correct. The bowman consistently hits around the target but never hits the bullseye demonstrates his high accuracy but low precision.

Accuracy: The ability of an instrument is to measure the accurate value is known as accuracy. In other words, it is the the closeness of the measured value to a standard or true value.

Precision: The closeness of the two or more measurements to each other is called as the precision of a substance.

In a laboratory situation, high precision with low accuracy will results from a systematic error. Either the measurer makes the same mistake will  repeatedly, or the measuring tool is somehow flawed. A poorly calibrated balance may give the same mass reading every time, but it will be so far from the true mass of the object.

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Rounding to the nearest half-ounce, the answer is 8 oz to two significant figures.

Generally, We are given:

1 cup = 8 oz

1 fluid oz = 29.7 mL

So, 1 cup = 8 fluid oz

= 8 * 29.7 mL

= 237.6 mL

To find the number of ounces of water measured using the measuring cup, we divide the volume in mL by the conversion factor from mL to oz:

237.6 mL / 29.7 mL/oz = 8 oz

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Equilibrium  constant of a reaction is the ratio of the molar concentration of product to that of reactants at equilibrium. For the given  reaction, the equilibrium constant is given, 6.00 ×10⁻² . Then, the concentration of ammonia is 0.53 M.

A compound or element gets ionized to form its anion or cation by the gain or lose of electrons.

Here, hydrogen and nitrogen reacts to give ammonia. The ratio of product of molar concentrations of products to the product of molar concentrations of the reactants at equilibrium is called the equilibrium constant.

The equilibrium constant constant of the given reaction is written as:

K = [H₃O]⁺ [CH₃COO-]/[CH₃COOH]

Given [H₂] =  2.09 M

and  [N₂] = 4.26 M.

then, K = [NH₃]/ 7.6 M × 16.4 M = 6.00 ×10⁻²

Then, [NH₃] = 6.00 ×10⁻²× 7.6 M × 16.4 M = 0.53 M

Therefore, the equilibrium concentration of ammonia is 0.53 M.

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The electronegativity of the element a is more important for elements in the same period of the periodic table, whereas bond strength is more important for elements in the same group.

Period: The horizontal rows are known as periods. Each period will corresponds to the successive occupation of the orbitals in a valence shell of the atom, with the long periods corresponding to the occupation of the orbitals of the d-subshell.

Group: The vertical columns in a periodic table are known as groups. There are 18 numbered groups in the periodic table; the 14 f-block columns, between the groups 2 and 3, are not numbered. The elements in a group have similar physical as well as chemical characteristics of the outermost electron shells of their atoms because the most chemical properties are dominated by the orbital location of the outermost electron.

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Answer:

2ClO2 + H2O → HClO2 + HClO3

Explanation:

pls tell me if wrong have a good day/night<3

The number of chlorine atom on left is 1 while on right side is 2. The balanced equation is 2ClO[tex]_2[/tex]+ H[tex]_2[/tex]O → HClO[tex]_2[/tex] + HClO[tex]_3[/tex]

An equation per a chemical reaction is said to be balanced if both the reactants or the products have the same number of atoms and total charge for each component of the reaction. In other words, each side of the reaction have an equal balance of mass and charge. The components and outcomes of a chemical reaction are listed in an imbalanced chemical equation, but the amounts necessary to meet the conservation of mass are not specified.

The skeletal equation is  ClO[tex]_2[/tex]+ H[tex]_2[/tex]O → HClO[tex]_2[/tex] + HClO[tex]_3[/tex]

The number of chlorine atom on left is 1 while on right side is 2. Multiply the reactant by 2. The balanced equation is 2ClO[tex]_2[/tex]+ H[tex]_2[/tex]O → HClO[tex]_2[/tex] + HClO[tex]_3[/tex]

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A macroscopic sample of an element contains an incredibly large number of atoms, all of which have identical number of protons .

It is defined as a substance which cannot be broken down further into any other substance. Each element is made up of its own type of atom. Due to this reason all elements are different from one another.

Elements can be classified as metals and non-metals. Metals are shiny and conduct electricity and are all solids at room temperature except mercury. Non-metals do not conduct electricity and are mostly gases at room temperature except carbon and sulfur.

The number of protons in the nucleus is the defining property of an element and is related to the atomic number.All atoms with same atomic number are atoms of same element.

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Empirical formula is SO3 with one sulfur atom and three oxygen atoms.

Empirical formula is the chemical formula of compound that gives proportions (ratios) of the elements present in compound but not the actual numbers or arrangement of atoms.

For sulfur: 40.0% of 100 g = 40 g = 40 / 32 mol = 1.25 mol

For oxygen: 60.0% of 100 g = 60 g = 60 / 16 mol = 3.75 mol

The ratio of the number of moles of sulfur to the number of moles of oxygen is 1.25 mol / 3.75 mol = 1/3.

The empirical formula is therefore SO3 with one sulfur atom and three oxygen atoms.

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Answer:

I'm pretty sure it's B but I'm not sure

Explanation:

The time that is taken  is obtained as 5.21 × 10⁻⁵ s.

For the zero order reaction that we have, we can see that;

rate = 24.00 × 10²⁵ M/s

From the integrated rate law:

[C₂H₅OH]t = [C₂H₅OH]₀ - 24.00 × 10²⁵ M/s × t

We now obtain the half life as;

t(1/2) = [C₂H₅OH]₀ / 2 × k

t(1/2) = (1.25 × 10²² M) / 2 × (24.00 × 10²⁵ M/s) = 2.60 × 10⁻⁵ s

The time that is required is now obtained as;

[C₂H₅OH]t = [C₂H₅OH]₀ - 24.00 × 10²⁵ M/s × t

0 M = 1.25 × 10²² M - 24.00 × 10²⁵ M/s × t

t = 5.21 × 10⁻⁵ s

The rate constant for the decomposition of ethanol on an alumina surface is 24.00 × 10²⁵ M.

The integrated rate law is: [C₂H₅OH]t = [C₂H₅OH]₀ - 24.00 × 10²⁵ M/s × t

If the initial concentration of C₂H₅OH was 1.25 × 10²² M, the half-life is 2.60 × 10⁻⁵ s.

The time required for all the 1.25 × 10²² M C₂H₅OH to decompose is 5.21 × 10⁻⁵ s.

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The molar mass of the solute is 163 g/mol.

Molar mass can be defined as the mass in grams of one mole of a substance. The units of molar mass are grams per mole abbreviated as g/mol.

The molar mass of the solute can be calculated using the equation:

ΔTf = Kf * molality

molality = ΔTf / Kf

molality = 5.1 / 5.12

molality = 0.99 g/mL

Since the molality is the number of moles of solute per 1 kilogram of solvent, we can find the number of moles of solute in 14.3 g of benzene.

n = molality * (14.3 g) / 1000 g/kg = 0.014 moles

The molar mass of the solute can be calculated as:

molar mass = (2.3 g) / (0.014 moles) = 163 g/mol.

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All the given combinations results in ionic compounds by electron donating from metals. The compound formed between sodium and chlorine is NaCl and that of magnesium and oxygen is MgO.

Ionic compounds are formed between metals and non-metals. Metals are electron rich and will easily loss electrons to electron deficient nonmetals.

Sodium chloride or NaCl is formed by donating one electron from the sodium metal to the chlorine atom. Similarly magnesium donates its two valence electrons to oxygen forming MgO.

The valency of both Al and N is 3. Al donates its 3 electron to N and forms aluminum nitride AlN.

Similarly, potassium and sulphur forms potassium sulphide K₂S, where, each potassium metal donates one electron to sulphur atom.

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Piston moves upward than volume will increases when water boils in an isolated system with a movable piston.

First law of thermodynamics: The first law of thermodynamics, also termed as the law of conservation of energy, states that energy can neither be created nor be destroyed, but it will be changed from one form into another.

Mathematically, ΔQ = ΔU + W

This first law of thermodynamics will be used in movable piston.

ΔQ is the heat given or the heat lost

ΔU change in internal energy

W will be the work done

Isolated system: A system which cannot exchange matter or energy with the surroundings, is called as an isolated system.

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--The given question is incorrect, the correct question is

"How the system is changing when water boils in an isolated system with a movable piston?"--

Answer:

If it's liquid, this is the total volume:300+100= 400 cm3

Explanation:

CH4 + 2O2 –––> CO2 + 2 H2O

100 . . 500. . . . . . 0 . . . . . .0. . . (initial)

100. . . 200 . . . 100 . . . . .200 . . (reaction)

0. . . . 300 . . . 100 . . . . . 200 . .(final)

H2O can be either gas or liquid. If it is gas, this is the total volume of gases : 300 + 100 + 200 = 600 cm3

If it's liquid, this is the total volume:300+100= 400 cm3

The strongest intermolecular interactions between hydrogen sulfide (H2S) molecules arise from dipole-dipole forces.

Sodium sulphide:

It is a peculiar chemical substance that emits a deadly gas and is highly combustible, corrosive, and toxic. At low concentrations, it smells like rotten eggs. It is created when organic material undergoes microbial decomposition in the absence of oxygen. It can be found in natural gas, crude oil, sewage, and other places.

Molecule-to-molecule force:

The electrostatic force of attraction between the molecules is what causes the intermolecular forces to exist. Ionic forces (ion to ion forces and ion to an induced dipole forces), dipole-dipole forces (hydrogen bonding, permanent dipole-permanent dipole, and permanent dipole-induced dipole forces), and Van der Waals forces are three different forms of intermolecular forces (induced dipole to induced dipole).

Strongest intermolecular hydrogen sulphide force:

The London dispersion force and the London scattering force are two of the weakest forces, and it is known to emphasise the dipole-dipole interaction. Due to the substantial difference in electronegativity between hydrogen and sulphur, their bond is polar. As a result, dipole-dipole interactions are what happen between molecules.

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The speed of Train A is 88 km/hr, and the speed of Train B is 96 km/hr. The trains have the same kinetic energy. Therefore, option D is correct.

Kinetic energy is the energy of motion, which can be seen as an object or subatomic particle moving. Kinetic energy exists in every moving object and particle.

The ability of kinetic energy to do work is perhaps its most important property. Work is defined as force acting in the direction of motion on an object. Work and energy are so inextricably linked that they can be used interchangeably.

The speed of Train A is 88 km/hr, and the speed of Train B is 96 km/hr. The trains have the same kinetic energy because their masses are identical.

Thus, option D is correct.

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Answer:

The correct set of coefficients for the given chemical reaction is 2, 4, 1, 2, which means that you have 2C₁2H₂2011+40₂200₂+114₂0.

By unit conversion the density of 7.2gmL is equal to 7.2 kg/L.

Here given, the density = 7.2 g/mL

Since,

We know that,

1g = 0.001 kg a

And also,

1mL = 0.001L

Now, let's convert 7.2 g/mL to kg/L:

7.2 g/mL x 1kg/1000g x 1000mL/1L

= 7.2 kg/L

As a result, by the unit conversion the density 7.2 g/mL is converted to  7.2 kg/L.

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Sulfur-tethered methylene bridge-junction (STMBJ) thiol methyl anchors are a type of chemical compound that is synthesized by attaching a methylene bridge to a sulfur atom through a thiol group.

These compounds are characterized by the presence of a sulfur atom, which acts as a tether, and a methylene bridge, which serves as a junction between the sulfur atom and the thiol group. They are used in organic synthesis as anchoring groups for various reactions and for the preparation of compounds with specific properties.

The synthesis of STMBJ thiol methyl anchors involves the use of chemical reactions, such as the reaction between a thiol and a carbonyl compound.

The characterization of these compounds is typically carried out using techniques such as infrared spectroscopy, nuclear magnetic resonance spectroscopy, and mass spectrometry.

The application of STMBJ thiol methyl anchors in organic synthesis is in the preparation of compounds with specific properties and in the design of new chemical reactions.

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Number of

atom

can be calculated using stoichiometry.

Moles

can be calculated by dividing mass and molar mass.

What is atom?

The smallest unit of

matter

that can be divided without producing electrically charged particles is the atom. It is also the smallest piece of matter with chemical element-like characteristics. As a result, the

atom

serves as the fundamental unit of chemistry.

Number of

atom

can be calculated using stoichiometry. Moles can be calculated by dividing mass and molar mass. Number of

molecules

can be divided by multiplying moles and Avogadro number.

Therefore, number of

atom

can be calculated using

stoichiometry

.

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atom

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[tex]\boxed{\boxed{\large\textsf{There are approximately 2.4$\sf\times10^{21}$ atoms in 47 mg of diamond}}}[/tex]

To determine the number of carbon atoms in a diamond, we can use Avogadro's constant and the number of moles of carbon present.

Avogadro's constant, which is approximately 6.022 x 10²³, represents the number of particles (atoms, molecules, compounds, ions, etc.) in one mole (a specific amount) of substance.

The number of moles (symbol n; units mol) present in a substance can be determined by dividing the mass present (in grams; symbol m), by the molar mass of the specified substance (in g/mol; symbol M), as follows:

[tex]\boxed{\Large\text{$\displaystyle\rm n\,(moles)=\frac{m\,(mass)}{M\,(molar\,mass)}$}}[/tex]

Next, we can use the molar mass of carbon, which is 12.01 g/mol (found on a standard IUPAC Periodic Table), to find the number of moles of carbon in the diamond. Firstly we convert the mass from milligrams to grams, by dividing by 1000 = 0.047 g of carbon.

Then, plugging values into the above formula, the number of moles can be found to be:

[tex]\large\textsf{$\sf\displaystyle n\left(C\right) = \frac{0.047}{12.01}=0.003913\,mol$}[/tex]

Finally, to find the number of carbon atoms, we multiply the number of moles of carbon by Avogadro's constant:

[tex]\large\textsf{N(C)\ =\ $\sf n\times N_A$}\\\\\large \textsf{$\phantom{N(C)}$= 0.003913 $\sf\times\left(6.022\times10^{23}\right)$ }[/tex]

[tex]\boxed{\boxed{\large\textsf{$\sf\therefore $ Number of carbon atoms = 2.4 atoms (2 s.f)}}}[/tex]

[tex]\hrulefill[/tex]

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Carbohydrates are organic molecules composed of carbon, hydrogen, and oxygen atoms.

They are a class of biomolecules which are essential to life on Earth, as they are the primary source of energy for cellular processes.

Carbohydrates can be divided into two categories:

These carbohydrates can provide energy, structure, and protection to cells, and they play an important role in many biological processes.

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The complete rate law should be like: Rate = k[NO][H2]^2

Rate = k[NO]^x[H2]^y, where x and y are the exponents for the concentration of nitric oxide (NO) and hydrogen (H2) respectively.

The rate law can be determined by performing experiments with different initial concentrations of NO and H2 and observing how the initial rate changes.

From the data provided,

It can be seen that increasing the concentration of NO by a factor of 2 results in an increase in the initial rate by a factor of 2^(x).

Similarly, increasing the concentration of H2 by a factor of 2 results in an increase in the initial rate by a factor of 2^(y).

Based on this information, x = 1 and y = 2 can be determined, giving us the rate law:

Rate = k[NO][H2]^2

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Option (a) is correct. Yes.

The new temperature of the gas is 594°C. This is calculated from the Gay-Lussac's law.

Let us consider the initial pressure is P1

The final pressure P2 = 3P1

Volume remains constant.

We can apply here the Gay-Lussac's Law. Gay-Lussac's Law states that the pressure of a given mass of gas varies directly with the absolute temperature of the gas where the volume is kept constant. It is a gas law which states the pressure of a gas varies directly with temperature when mass and volume are kept constant. As the temperature increases the pressure will also increase. According to this law, a gas's pressure is directly proportional to temperature. here we assume a constant volume and a constant number of moles. As pressure increases or decreases, the temperature also increases or decreases.

    P1/T1  =  P2/T2

          T2 = P2 * T1 / P1  

               =  3P1 * 289 / P1  

               =  867 K

   T2 = 867 - 273 = 594° C

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The statement exhibits that the weakest dispersion force is molecules that are smaller.

Thus, the correct answer is A.

The London dispersion force is the weаkest intermoleculаr force. The London dispersion force is а temporаry аttrаctive force thаt results when the electrons in two аdjаcent аtoms occupy positions thаt mаke the аtoms form temporаry dipoles. This force is sometimes cаlled аn induced dipole-induced dipole аttrаction. London forces аre the аttrаctive forces thаt cаuse nonpolаr substаnces to condense to liquids аnd to freeze into solids when the temperаture is lowered sufficiently.

Dispersion forces аre present between аll molecules, whether they аre polаr or nonpolаr. London dispersion forces tend to be:

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The amount of I2 in water will be 0.001202 mol/L according to the student's work.

The amount of a particular chemical solute in a specific concentration of the solution seems to be how strong it is. Molarity, or the number of molecules of material in one liter of solution, is a common unit of measurement for concentrations.

The capacity to focus is being able to control your attention. Control of attention is what it means. The capacity to concentrate without getting sidetracked on one thing, object, or concept. Focusing one's attention while ignoring extraneous thoughts is known as this.

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The number of neutrons in an atom varies and can be determined by the atomic number of the element. The atomic number is the number of protons in the nucleus of an atom and defines the element. The number of neutrons can be calculated by subtracting the atomic number from the mass number, which is the total number of protons and neutrons in the nucleus.

For example, the most common isotope of carbon has 6 protons and 6 neutrons, so its atomic number is 6 and its mass number is 12. The number of neutrons in this isotope of carbon is 12 - 6 = 6.

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The conjugate base of the specie HS^- is S^-

We know that form the Bronsted Lowry perspective of the acid and the base, the acid is the substance that can be able to give out a proton while the base is the kind of substance that can be able to accept a proton.

We can see here that the conjugate base is the specie that can be obtained by the loss of a proton from the HS^- as such we would have it as S^-.

Hence, we can see that the base that is the conjugate base in this sense is S^-.

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