This data table shows how quickly rope will rot away in freshwater and saltwater. what can you conclude about the rates of the rotting reaction?

A. The reaction occurs more slowly when the concentration of salt is higher.
B. The reaction occurs more quickly when the concentration of salt is higher.
C. The reaction occurs at the same rater, regardless of the concentration salt.
D. There is not enough information to conclude anything about the reaction rates.

If the intensity of the light is tripled, then the number of ejected electrons decreases by 1/3.

The energy E of a photon is equal to hv = hc/λ, where v is the frequency of the electromagnetic radiation and λ is its wavelength.

The given parameter is:

lambda = 2*10^-7 m

E = h*c/lambda

=(6.626*10^-34 J.s)*(3.0*10^8 m/s)/(2*10^-7 m)

= 9.939*10^-19 J

E = 9.939*10^-19 J

= 9.939*10^-19/(1.602*10^-19) eV

= 6.204 eV

Since, this is more than 4.3 eV, electron will be ejected.

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Km for this substrate Is 2 mM. Vmax of the substance is 14.9995 mM/s. The value of Kea for this enzyme is approximately 1.249 x 10^6 M^-1*s^-1. For this enzyme kea to km is  very high ratio, indicating that the enzyme is a good substrate for the enzyme.

To calculate Km from a Lineweaver-Burk plot, you need to find the substrate concentration at which the reciprocal of the substrate concentration (1/[S]) is equal to the reciprocal of the initial velocity (1/V0). This point is called the point of inflection on the Lineweaver-Burk plot. In this case, the point of inflection is located at a substrate concentration of approximately 20 mM. At this point, the reciprocal of the substrate concentration is 1/[S] = 1/20 mM = 0.05, and the reciprocal of the initial velocity is 1/V0 = 0.1. To calculate Km, you can use the equation: Km = (1/V0) / (1/[S]) Plugging in the values, you get: Km = (1/V0) / (1/[S]) = 0.1 / 0.05 = 2 mM The value of Km for this substrate is 2 mM. To calculate Vmax, you can use the equation: Vmax = V0 / (1 + Km/[S]). Where Vmax is the maximum initial velocity, V0 is the initial velocity, Km is the Michaelis constant, and [S] is the substrate concentration. Aa substrate concentration of 2.5 x 10^4 mM, the initial velocity is approximately 15 mM/s. Plugging in the values, you get: Vmax = 15 mM/s / (1 + 2 mM / 2.5 x 10^4 mM) = 15 mM/s / (1 + 8 x 10^-4) = 15 mM/s / 1.00008 = 14.9995 mM/s The value of Vmax for this enzyme is approximately 14.9995 mM/s. To calculate Kea, you can use the equation: Kea = Vmax / [E] Where Kea is the catalytic constant, Vmax is the maximum initial velocity, and [E] is the enzyme concentration. Plugging in the values, you get: Kea = 14.9995 mM/s / (1.2 x 10^-7 M) = 1.249 x 10^6 M^-1*s^-1 The value of Kea for this enzyme is approximately 1.249 x 10^6 M^-1*s^-1. The ratio of Kea to Km is a measure of the efficiency of the enzyme-substrate complex. A high ratio indicates that the enzyme is a good substrate for the enzyme, while a low ratio indicates that the enzyme is a poor substrate for the enzyme. In this case, the ratio of Kea to Km is approximately 1.249 x 10^6 M^-1s^-1 / 2 mM = 6.245 x 10^4 M^-1s^-1. This is a very high ratio, indicating that the enzyme is a good substrate for the enzyme.

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Strong bases and weak acids can hydrolyze into salts, raising the pH level over 7. Ammonium chloride (NH 4 Cl) is a salt whose solution has a pH of less than 7.

The pH will be less than seven when the solution is acidic and higher than seven when the solution is basic. Because Na2CO3 is a salt comprising a strong base and a weak acid, it will produce the highest pH in water. The pH scale determines how acidic or basic water is. The range is 0 to 14, with 7 representing neutrality. Acidity is indicated by pH values below 7, whereas baseness is shown by pH values above 7. In reality, pH is a measurement of the proportion of free hydrogen and hydroxyl ions in water.

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Answer:

To answer this question, you need to first write the balanced half-cell equations for the reactions occurring at the anode and the cathode.

At the anode, the reaction is:

H2 → 2H+ + 2e-

At the cathode, the reaction is:

1/2O2 + 2H+ + 2e- → H2O

Then, assuming that there is excess oxygen, we can calculate the number of moles of electrons that would be transferred if 3 moles of H2 were reacted. To do this, we need to first determine how many moles of H+ ions are produced when 3 moles of H2 are reacted at the anode. This can be calculated using the balanced half-cell equation for the anode reaction, which shows that 2 moles of H+ ions are produced for every mole of H2 reacted. Therefore, 3 moles of H2 would produce 6 moles of H+ ions.

Next, we can use the balanced half-cell equation for the cathode reaction to calculate how many moles of electrons are transferred when 6 moles of H+ ions are reacted. This equation shows that 2 moles of electrons are transferred for every mole of H+ ions that is reacted. Therefore, 6 moles of H+ ions would result in the transfer of 12 moles of electrons.

Therefore, the final answer is:

12 moles of electrons would be transferred if 3 moles of H2 were reacted.

The order of the lowest to highest normal boiling point:

H₂ < O₂ < H₂CO₃ < H₂O < CaO

The liquid phase turns into a vapor phase at this temperature.

The temperature at which a substance changes from the liquid phase into the gas phase is known as the boiling point. The melting point of ice or water and the boiling point of liquid water or vapor served as the foundation for the development of the Celsius scale. Every substance has a unique boiling point.

Since the ions in calcium oxide are strongly attracted to one another, its boiling point is 2850° C. As is already common knowledge, water has a boiling point of 100 °C.

The hydrogen gas has a boiling temperature of -252.8°C while the oxygen gas has a boiling point of -183°C. Carbonic acid has a boiling point of 333.6 °C.

Thus, of the listed chemicals, hydrogen gas has the lowest normal boiling point while CaO has the highest.

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Simple electrolyte compounds are diluted solutions to form inorganic salt solutions. In abrasive machining, mineral salt solutions are utilised to cool the operation and stop rust and corrosion of the machinery and finished goods.

In contrast to an organic salt, which has C-H bonds, an inorganic salt is one that does not. The chemical compound sodium chloride, which is made up of sodium and chloride ions, is one of the most well-known salts. For life to exist and flourish, inorganic salts are necessary.

An "Acidic Salt" is a salt that results from the interaction between a strong acid and a weak base.

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The molecular geometry of a molecule whose central atom has four single bonds and two lone pairs of electrons is square planar.

The shape of the orbitals is octahedral. Two orbitals contain lone pairs of electrons on opposite sides of the central atom. The remaining four atoms connected to the central atom give the molecule a square planar shape. If there are only two bonds and one lone pair of electrons holding the place where a bond would be then the shape becomes bent. For sp3 hybridized central atoms the only possible molecular geometry is tetrahedral. If all the bonds are in place the shape is also tetrahedral.

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Characteristics best determines the composition of the initial filtrate produced in the nephron Only small molecules enter the nephron.

The filtrate produced by the glomerulus moves directly from the glomerulus to Bowman's capsule. The filtrate contains some small molecules present in the blood. So, in addition to waste products, there are nutrient molecules and water, which are also removed by the nephron as filtrate.

Small molecules can pass through the intercellular space of the glomerulus and Bowman's capsule. These small molecules can pass through as filtrate, and some specific molecules within them are reabsorbed by the body as they are required for specific bodily functions.

Internal filtrate molecules are made up of these chemical elements in the body, only the larger molecules from the blood cannot enter the system.

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When nitrogen-14 is bombarded with an alpha particle, a proton is ejected and oxygen is formed.

Equation of the reaction is :

₇N + ₂alpha particle → ₁P + ᵃX

Balance the atomic number of the equation:

7 + 2 = 1 + a

a = 8

Balance the atomic mass of the equation:

14 + 4 = 1 + b

b = 17

So, the element with atomic number 8 is oxygen and its mass is 17.

Alpha particle, also referred to as alpha rays or alpha radiation, encompass  protons and  neutrons bound collectively into a particle same to a helium-4 nucleus. they're generally produced within the technique of alpha decay, but will also be produced in other approaches.

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Answer:

The correct answer is "Burning fuel inside of an engine." This is an example of a chemical reaction because it involves the rearrangement of atoms to create new substances. In this case, the fuel is reacting with oxygen in the air to produce heat, light, and various gaseous byproducts such as carbon dioxide and water vapor. By contrast, the other options are examples of physical changes, which involve changes in the state or appearance of a substance without changing its chemical composition.

Answer: Burning fuel inside of an engine

Explanation: Got it correct on the forms

(Edit: G o o g l e F o r m s)

Space is generally thought of as a vacuum, but it isn't, not completely. The density of matter is extremely low, but it still exists. The interstellar medium is mainly made of lone hydrogen atoms. The density of hydrogen as it exists in interstellar space is on average about 1 atom per cubic centimeter.

In the extremes, as low as 0.1 atom per cubic centimeter has been found in the space between the spiral arms, and as high as 1000 atoms per cubic centimeter are known to exist near the galactic core. The baseline temperature of outer space, as set by the background radiation from the Big Bang, is 2.7 kelvins. However, there are areas in space where the temperature is extremely hot, reaching into the millions.

The bottom line: the temperature of outer space is brutally cold.

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The average number of internet services in an area of 5.0-kilometer square would be 0.36 internet services..

The average number of people per square mile = 710

1 square mile = 2.59 square kilometer

The average number of people per kilometer square = 710

Number of internet services per person = 0.72

The total number of people that would be in a 5.0-kilometer square = 710 x 5 = 3550 people.

710 people = 0.72 internet services

3550 people = 3550 x 0.72/710

                       = 3.6 internet services

in other words, the average number of internet services per person in an area of 5.0-kilometer square would be 0.36 internet services.

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The transition metal cations by their d electron count, with the highest at the top and the lowest at the bottom is A > E > B > C > D.

D8 Metals was founded in 2004 as a company specializing in aluminum and steel fabrication, architectural metals and claddings, and custom electromechanical projects. Instead of an 8-electron rule or octet, transition metals follow an 18-electron rule. The easiest way to count electrons is to break down the complex and count the electrons apart.

There are 40 elements in the d block of the periodic table. Four rows of transition elements make up the d block. The d-electron number is a chemical formalism used to describe the electronic configuration of the valence electrons of the transition metal centers of coordination complexes. The d electron number is an effective way to understand the shape and reactivity of transition metal complexes.

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Among the given options, the pair that is most likely to form homogenous solution is  NF₃ and SO₂.

A homogenous solution is a solution that has a uniform distribution of the particles all over the solution.

Basically, to be a homogenous solution, both the solute and the solvent has to be in the same state and both of the has to be of the same nature i.e. Polar or Non-Polar.

Among the given options are CCl₄ and SCl₂, NF₃ and SO₂, CO and C₆H₆, NH₂CH₃ and CH₄.

Only the pair of  NF₃ and SO₂ are polar and found in same state at room temperature.

So,  NF₃ and SO₂ are most likely to form a Homogenous solution.

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The wavelength of the photon that is emitted from transitions ending in the ground state is 397.56 nm

E(n) = - k/n^2

In fact, since the ionization energy (from ground state) is:

-E(1), E(n) = - (17.5 eV)/n^2

E(1) = -17.5 eV

E(2) = -4.375 eV

E(3) = -1.94 eV .

E(4) = -1.094 eV

E(5) = - 0.7 eV

The change in energy going from n = 4 to n = 2 will be:

E(4) - E(2) = 3.281 eV

The change in energy = hc/∧, so

∧ = h/energy-change

= 6.626 x 10-34 x 3 x 108 /(3.281 x 1.6022 x 10-19 J)

= 397.56 x 10-9 m

= 397.56 nm

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The order of increasing bond length is d) c-f &lt; c-cl &lt; c-s

The bond length of a covalent bond is determined by the size of the atoms involved and the strength of the bond. The size of the atoms involved in the c-f, c-s, and c-cl bonds are carbon, fluorine, sulfur, and chlorine, respectively. Carbon and fluorine are smaller atoms, while sulfur and chlorine are larger atoms. Therefore, the c-f bond will be the shortest bond.

The strength of the covalent bond is determined by the electronegativity of the atoms involved. Fluorine has the highest electronegativity of all the elements, followed by chlorine and then sulfur. Therefore, the c-f bond will be the strongest bond. The c-cl bond will be the second strongest bond, and the c-s bond will be the weakest bond.

Given these facts, the order of increasing bond length is c-f < c-cl < c-s. The c-f bond will be the shortest and strongest bond, followed by the c-cl bond and then the c-s bond.

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The Insoluble Substance is Barium Nitrate

BANO4

Solubility rules for chromate (CrO₄²⁻) are all chromate are insoluble, except for ions group 1 (Li⁺, Na⁺, K⁺). So soluble chromate are

Li₂CrO₄

Na₂CrO₄

K₂CrO₄

Potassium chromate K₂CrO₄ is soluble.

A substance is said to be insoluble if it doesn't change when placed in water.

When introduced to water, soluble compounds typically form one continuous phase (eg when salt is added to water).

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The appropriate types of chromatography for the labels are:

Fm>2000, octane soluble, size 10 nm: Bonded normal phase

Fm>2000,  butanol soluble, size 100 nm: Bonded normal phase

Fm>2000, water soluble, non-ionic, size 10 nm: Adsorption

Fm<2000,  ethanol soluble: Bonded reverse phase

Fm<2000, water soluble, ion paired: Ion exchange

Fm<2000, water soluble, ionic: Ion exchange

Liquid chromatography is a separation technique that uses  liquid stationary and mobile phases to separate and purify compounds. There are many different types of liquid chromatography, each with different stationary phases and separation mechanisms.

In ion-exchange chromatography, the stationary phase consists of ionizable groups that interact with ions in the mobile phase. This type of chromatography is used to separate charged molecules such as ions and ion-pair compounds.

In adsorption chromatography, the stationary phase consists of solid adsorbents like Silica or alumina that interacts with the analyte via van der Waals forces, dipole-dipole interactions, or hydrogen bonding. This type of chromatography is used to separate compounds based on their affinity for the stationary phase.

In normal-phase chromatography, the stationary phase is a non-polar material such as silica or alumina, and the mobile phase is a polar solvent such as water or methanol. This type of chromatography is used to separate non-polar compounds based on their affinity for the stationary phase.

In reversed-phase chromatography, the stationary phase is a polar material such as octadecyl silica or cyanide-bonded silica, and the mobile phase is a non-polar solvent such as hexane or methylene chloride. This type of chromatography is used to separate polar compounds based on their affinity with the stationary phase.

Molecular exclusion chromatography, also called size exclusion chromatography, is a type of chromatography that separates molecules based on their size. The stationary phase consists of porous spheres with different pore sizes, and molecules are separated based on their ability to penetrate the pores. This type of chromatography is used to separate molecules with molecular weights greater than 2,000 Daltons.

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Bromine, selenium, arsenic, germanium has 4 shells around the nucleus.

The chemical elements are arranged in rows and columns in the periodic table, which is also known as the periodic table of the (chemical) elements.

It is commonly regarded as an icon of chemistry and is utilized extensively in physics, chemistry, and other sciences.

The periodic law, which asserts properties of chemical elements display a roughly periodic dependency on their atomic numbers, is graphically expressed in this way.

Four blocks, or roughly rectangular sections, make up the table. Periods and groups are the names of the table's rows and columns, respectively.

The chemical properties of elements in the same group on the periodic table are similar. The periodic table shows trends, with the proportion of non-metallic elements rising from left to right over time.

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Phenylacetone is a natural product found in Streptomyces and Gossypium hirsutum for which data are available.

Propiophenone and its derivatives. They are commonly used in perfumes and medicines. Class 1C antiarrhythmic drug used to treat paroxysmal atrial fibrillation/flutter and ventricular arrhythmias.

Propiophenone is an aromatic ketone in which the two substituents on the carbonyl carbon atom are phenyl and ethyl. Methanal is the IUPAC name for formaldehyde and ethanal is the name for acetaldehyde. For ketones, remove -e from the alkane name and add the suffix -one. Propanone is his IUPAC name for acetone and butanone is the name for ethyl methyl ketone.

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The skeletal structure of the organic compounds are the series of the atoms bonded together and form the important structure of the compound.

The statements that describe important rules for drawing skeletal structures are :

1)  all heteroatoms and the hydrogens directly bonded to them.

2)  there is a carbon atom at the junction of any two lines or at the end of any line.

3) there are enough hydrogens around each carbon to give it four bonds.

These three option are the correct statements to describe the important rule for the drawing skeletal structures to represents the important structure of the organic compound.

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The chemical equation of the generic acid is

HA(aqueous) + H2O(liquid) → H3O⁺(aqueous) + A⁻(aqueous)

The generic acid formula is H₂GO₃, formed from two hydrogen ions (2 H⁺) and one product ion (GO₃²⁻). It is liquid at room temperature. Being generic, it does not have a defined melting point or boiling point, molar mass, pH, LD50, or many other properties. However, it is a weak acid. If you want a stronger acid, the hydrogen acid is stronger. It is the most famous generic compound. It's often used in fiction when writers don't want to indicate a certain kind of acid. Fictitious generic acids may have unrealistic properties, and using generic acids prevents authors from claiming that real substances do the impossible. The reaction of the generic acid is given above.

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The Archimedes principle states that when an object is submerged in a fluid, it seems to lose weight proportional to the weight of the fluid that was displaced.

The mass of the water that the object moves is equal to this force. It turns out that it is still possible to demonstrate that even if the object is excessively heavy (density more than water), if the density of a fully submerged object (independent of its shape) is larger than the density of the fluid. Some objects float when submerged in a liquid because the buoyant force is greater than the object's weight, causing the object to rise to the surface and float. If an object's buoyant force exceeds its weight when submerged in a fluid, it will rise. We can determine the mass and weight of water once we know its volume.

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What is genetic modified organisms?

genetically modified organism (GMO) is associate animal, plant, or germ whose DNA has been altered victimization gene-splicing techniques. For thousands of years, humans have used breeding ways to change organisms.

Many GMO crops are wont to create ingredients that Americans eat adore cornstarch, corn syrup, corn oil, soybean oil, canola oil, or coarse sugar. many contemporary fruit and vegetables are on the market in GMO varieties, together with potatoes, summer squash, apples, papayas, and pink pineapples

Hence solutions are:

The response proposes an answer such as the subsequent for decreasing the full quantity of chemical pesticides employed in United Kingdom of Great Britain and Northern Ireland for agriculture:

Use genetically changed organisms () that are designed for gadfly resistance. observe integrated pest-management techniques to regulate pests.

Hence use of Genetic modified organisms is solution.

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The Most Appropriate Reagent(S) For The Conversion Of 2-Methylcyclohexanol To 2- Methylcyclohexanone is (A) PCC, CH₂Cl₂.

It is possible that carbonyl compounds will be produced as a byproduct of the oxidation of alcohols using pyridinium chlorochromate in CH₂Cl₂, however, this will depend on the specific type of alcohol. Primary alcohols will react with PCC to produce aldehydes while secondary alcohols will react with PCC to produce ketones, and tertiary alcohols will not react with PCC. So the most appropriate reagents for the conversion of 2-methylcyclohexanol to 2- methylcyclohexanone are (A) PCC, CH₂Cl₂. The reaction scheme along with the structures of reagents and products are attached.

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Answer:

Explanation:

Q=M*C*ΔT

Where,Q=Required heat

           C=Specific heat of water

           ΔT=Temperature change

   [tex]M=\frac{Q}{C*T}[/tex]

  [tex]M=\frac{10000}{4.184*28}[/tex]

  [tex]M=\frac{10000}{117.15}[/tex]

 [tex]M=85.3g[/tex]

Q = mcT, where Q is the heat provided, m is the mass of water, and c is the temperature change, may be used to determine how much water can be warmed by the addition of 10.00kJ of heat.

In this instance, the water's beginning temperature is 22°C, and its ultimate temperature is 50°C, meaning that there has been a 28°C change in temperature.

Water has a heat capacity of 4.184 J/g°C, therefore m = Q / (cT) = 10.00kJ / (4.184 J/g°C x 28°C) = 7.08kg is the mass of water that can be warmed by the addition of 10.00kJ of heat. As a result, 7.08 kg of water may be warmed with the addition of 10.00 kJ of heat.

Considering that heat immediately proportionate to the water's bulk and temperature. The amount of heat needed to warm the water increases with the bulk of the water and the temperature change.  

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The 105.152mL ok KH2 PO4 is the additive volumes.

What is volume ?

The volume of a three-dimensional solid is the area that it takes up. These solids can be shaped into cubes, cuboid shapes, cones, cylinders, or spheres.

What is dihydrogen phosphate ?

Phosphoric acid, which has had one of its three OH groups deprotonated, is used to create the monovalent inorganic anion known as dihydrogenphosphate. It is both an inorganic monovalent phosphate ion and an anion. This base is the conjugate of phosphoric acid. It is an acid conjugated to hydrogen phosphate.

pH = pKa + log (HPO4-2)/(H2 PO4-)

6.84 = 7.21+ log ( HPO 4 -2)/ (H PO4-)

- 0.37 = log (H PO4-2)/ (HPO4-)

0.4265 = (HPO4-2)/ (HPO4-)

(HPO4-2)= 0.4265 x (HPO4-)

let's call X to the volume of KH2PO4  needed. so, the volume needed of K2HPO4 will be 150-X, now transform concentration into moles

1M HPO4-2 x (150-X) = 0.4265 x  1M h2 PO4- x X

150-X = 0.4265X

150= 1. 4265X

X = 105.152mL ok KH2 PO4.

Therefore, 105.152mL ok KH2 PO4 is the additive volumes.

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The balanced chemical equation for above chemical reaction is given as,

Fe₂O₃ + 3 CO → 2 Fe + 3 CO₂

There are several ways to balance a chemical equation. In this above case case, we will see the algebraic method.

The first step is of assigning a letter to each compound:

a Fe₂O₃ + b CO → c Fe + d CO₂

Then, we must write the balance equations for each atom, thus:

Fe: 2a = c

C: b = d

O: 3a + b = 2d

The last step is of assigning a value to a letter. For example, we will say that a is 1, and then find the values for the others letters,

Fe: 2a = c if a=1; c=2

O: 3a + b = 2d if a=1 → 3+b = 2d

As b = d → 3+d = 2d; 3 = 2d - d; 3=d and 3=b

Thus, the balanced equation is given as,

Fe₂O₃ + 3 CO → 2 Fe + 3 CO₂

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A. Co + H₂O ⇄ co₂+ H₂

= -8.314[tex]\frac{J}{K.mol}[/tex]  x298k x In (6.54x16³)

= -21.77 kJ/m0/

for 2.32 molco, A = -21.77×2-32

= -50.51kj/mol

B. Fe₂03(5) +3H₂(9) ⇄ 2 Fe(s) + 3H₂0(9)

= -8.314 × 298x/n (2.47x10⁻¹⁰)

= +54.807 kJ/mol

for 1.61 mol fe₂03, Δ4= 54.807 X 1.61 mol

= 88.24 kJ/mol.

Equilibrium constant numbers are obtained by allowing a single reaction to reach equilibrium and measuring the concentrations of each substance involved in the reaction. The ratio of product concentration to educt concentration is calculated. A mathematical ratio indicating product concentration divided by reactant concentration.

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