Which formula shows a correct representation of the combined gas law?(1 point)
A. V1 / P1T1=V2 / P2T2

B. P1 / V1T1=P2 / V2T2

C. V1T1 / P1=V2T2 / P2

D. V1P1 / T1=V2P2 / T2

2.0×10^5 C/mole  is his experimental value for faraday's constant if the student calculates that 800000 coulombs of charge were consumed in the production of the 4 moles of hydrogen

Q=nC

Q=charge

n=moles

C= faraday's constant

put values in equation

C=800000/ 4

C=200000=2.0×10^5 C/mole

The amount of electric charge needed to release one gram equivalent of any ion from an electrolytic solution is measured in faraday, also known as the faraday constant, a unit of electricity used in the study of electrochemical processes. It is named for the 19th-century English physicist Michael Faraday and equals 6.022140857 ×10^23 electrons, or 9.648533289 104 coulombs. It is used in electric solutions.

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Answer:

I don't know yr language

Peroxidase activity increases and then decreases due to a change from a moderately acidic environment (pH near 6) to a basic environment.

Peroxidase is an enzyme found in a wide variety of organisms, from plants to humans to bacteria. Its function is to decompose hydrogen peroxide (H₂O₂). Hydrogen peroxide is one of the toxins produced as a by-product of using oxygen to breathe. (The fact that hydrogen peroxide is toxic makes it useful in first aid kits.

Peroxidase activity is strongly influenced by pH factors. Peroxidase works best at pH 7, but increasing or decreasing pH adversely affects its activity. Therefore, when moving from a weakly acidic environment close to pH 6 to a basic one, the peroxidase activity increases as the neutral environment approaches and decreases as the basic environment approaches, so that the peroxidase activity varies with the pH of the solution.

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The complete question is as follows:

Researchers investigated the influence of environmental pH on the activity of peroxidase, an enzyme that catalyzes the conversion of hydrogen peroxide to water and oxygen gas. In an experiment, the researchers added a hydrogen peroxide solution containing guaiacol to several identical test tubes and adjusted the solution in each test tube to a different pH . The researchers included the guaiacol because it caused the solutions to change color as the reactions proceeded, which the researchers relied on for measuring reaction rates. Finally, the researchers added the same amount of peroxidase to each test tube and measured the rate of each reaction at 23°C . The results of the experiment are represented in Figure 1.

Based on Figure 1, which of the following statements best predicts the effect that a change from a moderately acidic environment ( pH near 6) to a basic environment will have on peroxidase activity?

answer choices

Peroxidase activity will decrease.

Peroxidase activity will increase.

Peroxidase activity will stay the same.

Peroxidase activity will increase at first and then decrease.

Answer:

all u have to do is inserting hydrogen atoms where it's possible, if carbon is not bonded to any element, then it can have 4 hydrogens. for the first chain, the first carbon can have 3 hydrogen atoms, the second carbon 1 hydrogen atom only the third also 1 hydrogen since there is double bond and the 4th 2 hydrogen atoms

Answer:

a rat and a cat can have sex

xD

Explanation:

Answer:

A location that is humid, would most likely support a marsh ecosystem.

Explanation:

The Florida Everglades are an example of a marsh :)

"Marshes are a type of wetland ecosystem where water covers the ground for long periods of time. Marshes are dominated by herbaceous plants, such as grasses, reeds, and sedges."

Polyester fabric refers to a type of synthetic textile material that is made from polyester fibers. Polyester is a polymer, which means it is made up of many repeating units of a single molecule. It is often blended with other fibers, such as cotton or rayon, to create fabrics that are durable, lightweight, and wrinkle-resistant.

Polyester fabric has a number of advantages over natural fibres, including resistance to stretching and shrinking, as well as resistance to wrinkles and creases. It is also relatively easy to care for, as it can usually be machine-washed and dried without any special treatment. Polyester fabric is commonly used in clothing, bedding, and home furnishings, as well as in industrial applications such as filter fabrics and insulation materials.

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Any three base sequence found on the mRNA that codes for a specific amino acid is called a codon.

The three base of the sequences that are found in the mRNA , the one after another code for the specific amino acid. So, the three bases are together is known as the codons and it based on the codon sequence of the mRNA polypeptides will be produced.

The polypeptides will be formed after the translation and it based on the codons in the mRNA the peptide will be produced.  The coons are the specific for the single amino acid that will makes the codons universal.

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The direction of the force acting on an electron that travels in the +x direction, and the magnetic field points in the +y direction is option C, which is -y. What is the Lorentz force? Lorentz force is the force exerted on a charged particle in an electromagnetic field.

The Lorentz force is the sum of the electrical force and the magnetic force on a charged particle. It is defined as F = qi + qvB, where F is the force on the charged particle, q is the charge, E is the electrical field, v is the velocity, and B is the magnetic field.In this particular case, the magnetic force is acting on the electron. Since the electron is negatively charged, it will be deflected by a force perpendicular to both the direction of motion of the electron and the direction of the magnetic field. As the electron moves in the +x direction, and the magnetic field points in the +y direction, the force on the electron will be in the -y direction.The force on the electron is given by F = qvB sin θ, where θ is the angle between the velocity and the magnetic field. Since the angle between the velocity of the electron and the magnetic field is 90 degrees, sin θ = 1. Therefore, the force on the electron is F = qvB. The direction of the force is given by the right-hand rule. The thumb of the right hand points in the direction of the velocity, the fingers point in the direction of the magnetic field, and the palm gives the direction of the force. Applying the right-hand rule, we find that the force on the electron is in the -y direction.

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The strong acid and strong base has high rate constant of dissociation. The rate constant for weak acid and base for the dissociation is low, they do not easily dissociate in water. Therefore, no, acid would not remain acid  if the positions of electrons and protons were swapped.

Acid is a solution which releases H⁺ hydrogen ion when dissolved in water. Base releases hydroxide ion OH⁻ ion when dissolved in water.

pH is a measurement of amount of hydronium ion H₃O⁺ in a given sample. Strength of acidic nature is directly proportional to the concentration of hydronium ion.

On subtracting pH from 14, we get pOH which measures the concentration of hydroxide ion in a given solution. Temperature affect the pH. At room temperature pH scale is between 0 to 14. 7 is the pH of neutral solution. No, acid would not remain acid  if the positions of electrons and protons were swapped.

Therefore, no, acid would not remain acid  if the positions of electrons and protons were swapped.

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Answer:

Xe that is xenon

Explanation:

Xe that is xenon

1) In this experiment, I3- reacts more quickly with S2O3-2 (thiosulfate ion) compared to starch. This is important because the reaction between I3- and S2O3-2 is the basis of the iodine clock reaction. The reaction between I3- and S2O3-2 is relatively fast and produces a color change, which allows for the determination of reaction rates. On the other hand, the reaction between I3- and starch is slower and does not provide a noticeable color change, making it less suitable for determining reaction rates in this particular experiment.

2) Swirling the flask consistently after the addition of the peroxide solution is important to ensure proper mixing and uniform distribution of reactants. By swirling the flask, you ensure that the reactants are thoroughly mixed, which allows for more accurate and reliable results. This consistent swirling helps to minimize any concentration gradients and promotes faster reaction kinetics by increasing the contact between the reactants. It also helps to maintain a homogenous reaction mixture, which is essential for obtaining reliable and reproducible data.

3) The rate of the reaction would be affected if the actual temperature of one of the solutions was several degrees cooler than the recorded temperature. Temperature has a significant influence on reaction rates, as it affects the kinetic energy of the particles involved. Generally, an increase in temperature leads to an increase in reaction rate, and a decrease in temperature results in a decrease in reaction rate.

If one of the solutions is cooler than the recorded temperature, it would slow down the reaction rate. The reactant particles would have lower kinetic energy, reducing the frequency of successful collisions and slowing down the formation of product molecules. As a result, the observed reaction rate would be slower than expected.

To ensure accurate and reliable data, it is important to control and maintain the temperature of the solutions throughout the experiment. This can be done by using temperature-controlled equipment or allowing the solutions to equilibrate to the desired temperature before starting the reaction. Keeping the solutions at the same temperature as the recorded temperature helps to maintain consistency and allows for a fair comparison of reaction rates.

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[H+] = 0.01 M (OH-) = 0.01 M The answer is simple. pH = 9.31 b. (H+) = 0.0003 M (OH-) = 0.0014 M The mixture is acidic. pH = -0.47 c. (H+) = 0.001 M (OH-) = 0.001 M pH = 3.09, the solution is neutral. The acidity or basicity of a solution is determined by its pH.

The formula used to compute it is pH = -log[H+], where [H+] represents the amount of hydrogen ions in the solution. We may utilise the equation [H+][OH-] = 10-14 to get the [H+] and [OH-] for a given solution. According to this equation, the sum of [H+] and [OH-] at any temperature must equal 10-14. Using the formula [H+][OH-] = 10-14, we can get the [H+] and [OH-] for the first solution at 25°C.

Since [H+] = 10-9.31 because the pH of the solution is 9.31. By include this number in the formula, we may determine that [OH-] = 10-9.31/10-14 = 10-9.31-10-14 = 10-9.31. The result is a basic solution with a pH of 9.31 since [H+] = 10-9.31 and [OH-] = 10-9.31. Using the formula [H+][OH-] = 10-14, we can get the [H+] and [OH-] for the second solution at 25°C. [H+] = 10-0.47 since the solution's pH is -0.47.

By entering this number into the equation, we can determine that [OH-] = 10-0.47/10-14 = 10-0.47. The result is an acidic solution with a pH of -0.47 since the [H+] = 10-0.47 and the [OH-] = 10-0.47. Using the formula [H+][OH-] = 10-14, we can get the [H+] and [OH-] for the third solution at 25°C.

Given that the solution's pH is [H+] = 10-3.09 since the solution's pH is 3.09. By include this number in the formula, we can determine that [OH-] = 10-3.09/10-14 = 10-3.09-10-14 = 10-3.09. The pH of the solution is 3.09, making it neutral since [H+] = 10-3.09 and [OH-] = 10-3.09.  

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The pillar of sustainability broken by recycling electronics in India is environmental sustainability. Implementing a law that restricts electronics recycling to the US would not necessarily be the most effective solution, as it overlooks the complex global dynamics of electronic waste management.

Recycling electronics in India often involves improper disposal methods, such as burning or dismantling without proper safety measures. This leads to environmental pollution, including the release of hazardous substances into the air, soil, and water, thus violating the principle of environmental sustainability.

However, simply mandating that electronics can only be recycled in the US may not be the most optimal solution. Electronic waste is a global issue, and restricting recycling to a single country disregards the fact that electronic products are manufactured and consumed worldwide. A more comprehensive approach to addressing electronic waste would involve international cooperation, strict regulations, and monitoring of recycling practices to ensure they meet environmental standards.

Efforts should focus on improving recycling practices globally, including promoting responsible electronic waste management, developing sustainable recycling infrastructure in multiple countries, and encouraging the adoption of safe and environmentally friendly recycling practices. This approach would foster global sustainability and address the challenges associated with electronic waste disposal more effectively than a geographically limited restriction.

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The given chemical equation can be balanced as: CH4 + 2O2 → CO2 + 2H2OTherefore, the balanced chemical equation for the reaction between 46 g of CH4 and 32 g of O2 is:CH4 + 2O2 → CO2 + 2H2OMoles of CH4 = (46 g)/(16.04 g/mol) = 2.87 molMoles of O2 = (32 g)/(32 g/mol) = 1 mol.

Moles of CH4 = (46 g)/(16.04 g/mol) = 2.87 molMoles of O2 = (32 g)/(32 g/mol) = 1 molFor the given reaction, one mole of CH4 reacts with 2 moles of O2. Therefore, 2.87 moles of CH4 would react with 2 × 2.87 = 5.74 moles of O2. As we can see from the given values, only 1 mole of O2 is present. Hence, O2 is the limiting reactant.The balanced chemical equation for the reaction between 46 g of CH4 and 32 g of O2 is:CH4 + 2O2 → CO2 + 2H2OOn

The basis of the balanced chemical equation, 2 moles of O2 is required for one mole of CH4. Here, the moles of O2 is lesser than 2 times the moles of CH4, which means O2 is the limiting reactant and CH4 is the excess reactant. Hence, 32 g of O2 will react completely with 1 mole of CH4, and 14.14 g of CO2 and 4 g of H2O will be produced as per the stoichiometry.

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The solution to the equation and value of variable 21(3d - 4) + 100 = 58 is d = 2/3.

Solve the equation 21(3d - 4) + 100 = 58, we can begin by simplifying and isolating the variable:

21(3d - 4) + 100 = 58

Distribute 21 to the terms inside the parentheses:

63d - 84 + 100 = 58

Combine like terms:

63d + 16 = 58

Subtract 16 from both sides:

63d = 42

Divide both sides by 63:

d = 42/63

Simplifying the fraction gives:

d = 2/3

The solution to the equation is d = 2/3.

The solution to the equation 21(3d - 4) + 100 = 58 is d = 2/3. By simplifying the equation, we find that dividing both sides by 63 results in the solution of d = 2/3, which satisfies the original equation.

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D. She is not right, because there will be more successful collisions

between reactants in the concentrated solutions.

Enid claims that two concentrated solutions will have a lower reaction rate than two dilute solutions. The statement tells that whether Enid is right given as ". She is not right, because there will be more successful collisions between reactants in the concentrated solutions.

So, option D is correct one.

A solution which has relatively large amount of dissolved solute.

Since, rate of the reaction depends upon collision between reactants molecules. Due to presence of large amount of dissolved solute in concentrated solution, more collision is takes place between solute molecules. So, rate of reaction of concentrated solution is more as compare to dilute solution.

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Answer:

A catalyst is a substance that speeds up the rate of a chemical reaction without itself being consumed in the reaction. Enzymes are biological catalysts that are found in all living things. Amylase is an enzyme that breaks down starch into sugar.

Explanation:

Catalysts work by lowering the activation energy of a reaction. Activation energy is the minimum amount of energy that the reactants need to have in order to react. When a catalyst is present, it provides an alternative pathway for the reaction that has a lower activation energy. This means that more of the reactants will have enough energy to react, and the reaction will proceed faster.

In the case of amylase, it lowers the activation energy of the reaction that breaks down starch into sugar. This means that more of the starch molecules will have enough energy to react, and the reaction will proceed faster. This is why our saliva contains amylase, so that we can start digesting starch as soon as we put food in our mouths.

During evaporation, for the water molecules to escape as gas, it needs to break hydrogen bonding between molecules.

Various special properties exhibited by water is due to the presence of hydrogen bonding.  When in liquid form, hydrogen bonds are continuously formed and breaks when the molecules moves. Hydrogen bonds breaks as a result of kinetic energy which makes the molecules move in the system. As the temperature is increased kinetic energy increases and these hydrogen bonds are completely broken and escapes as water vapor.

It requires as much heat to break the hydrogen bonds, as much as increasing the temperature. Due to hydrogen bonds water has high specific heat capacity and also high heat of vaporization.

So to vaporize, hydrogen bonds between water molecules must be broken.

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Answer:it’s b they transfer thermal energy away from earths core towards its crust

Explanation:

Good luck!

Thermal energy moves from the outer core, through the mantle, and to the  crust by conduction.

Heat transferred from the core through the mantle and to the crust in the process of conduction. The lower mantle is heated directly by conduction from the core. In conduction, heat is transferred from one particles to another.

In the process of conduction, heat flows from warmer objects to cooler objects so the outer core has high amount of heat energy which is transferred to the surrounding mantle layer due to its lower temperature so we can conclude that thermal energy moves from the outer core, through the mantle and to the crust by conduction.

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Answer: D. Exactly one reactant is a solid, and exactly one product is a gas.

Explanation: PLATO

In the given reaction, there is only one reactant in solid state, that is copper carbonate and one gaseous product carbon dioxide. Hence, option D is the correct statement.

Copper carbonate is an ionic compound formed by the combination of copper metal and carbonate group. Copper metal loses two electrons to the carbonate group. It is a white powder and sparingly soluble in water.

The states of reactants and products in a reaction is represented  in brackets with the chemical formula of each compound. The reaction in which all the reactants are in same phase is called homogeneous.

The given reaction is an example of heterogeneous replacement reaction. The reaction includes the combination of solid copper carbonate with aqueous  HCl giving copper chloride solution and carbon dioxide gas. Thus, option D is correct.

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The standard enthalpy change for reaction (3) is 117.1 kJ.

The standard enthalpy change for reaction (3) can be calculated by using the enthalpy changes of reactions (1) and (2) and applying Hess's Law.

To do this, we need to manipulate the given equations so that the desired reaction (3) can be obtained.

First, we reverse reaction (1) to get the formation of C2H4(g) from C2H6(g):

C2H4(g)C2H6(g) ΔH° = -52.3 kJ

Next, we multiply reaction (2) by 2 and reverse it to obtain 2 moles of C2H6(g) reacting to form 3 moles of H2(g):

2C2H6(g)2C(s) + 3H2(g) ΔH° = 169.4 kJ

Now, we add the two modified equations together:

C2H4(g)C2H6(g) ΔH° = -52.3 kJ
2C2H6(g)2C(s) + 3H2(g) ΔH° = 169.4 kJ

When adding these equations, the C2H6(g) on the left side cancels out with the C2H6(g) on the right side, leaving us with the desired reaction (3):

C2H4(g) + H2(g)C2H6(g) ΔH° = -52.3 kJ + 169.4 kJ = 117.1 kJ

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Answer: EADCBCEDBA

Explanation:

1.  E - Moderately to very polar covalent

        Electronegativity (χ) = .84

2. A - Nonpolar covalent

        χ = 0 - There is no electronegativity difference

3. D - Ionic

        χ = 3 - The electronegativity is greater than 2

4. C - Very polar covalent

          χ = 1.55

5. B - Moderately polar covalent

         χ = .76

6. C - Very polar covalent

         χ = 1.4

7. E - Moderately to very polar covalent

        χ=.89

8. D - Ionic

       χ= 2.46

9. B - Moderately polar covalent

       χ = .82

10. A- Nonpolar covalent

      χ = 0 - There is no electronegativity difference

hope this helps :3

If we had used 4 grams of NaOH instead of 2 grams, the heat gained by the solution would have been higher.

The term enthalpy has to do with the heat that could be emitted or evolved in a given reaction. We know that in a neutralization reaction, there is an evolution of heat and as such the reaction  vessel would feel warm at the end of the reaction.

Also, the enthalpy would depend on the amount of the limiting reactant. In this case, the limiting reactant would be the sodium hydroxide and as such the enthalpy would affected by a change in the amount of the sodium hydroxide.

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One mole of ring form of sulfur has a molecular weight of 8 × 32 g/mol = 256 g/mol and it reacts with 4 moles of molecular oxygen to make 3 moles of sulfur trioxide and 4 moles of water.

The balanced chemical equation for the reaction is:8S + 12O2 → 8SO3 + :For complete combustion, one mole of sulfur requires 12 moles of molecular oxygen.

Therefore, one mole of the ring form of sulfur requires 12/8 = 1.5 moles of molecular oxygen.However, the given question is only asking for the number of moles of molecular oxygen required when sulfur ring burns to make sulfur trioxide.

So, the number of moles of molecular oxygen required when one mole of ring form of sulfur burns to make sulfur trioxide is 1.5 × 3/8 = 0.5625 moles.

Summary:Thus, 0.5625 moles of molecular oxygen is required when one mole of ring form of sulfur burns to make sulfur trioxide.

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The strong acid and strong base has high rate constant of dessociation. Weak acid and base are the one whose rate constant for the dissociation is low, they do not dissociate readily in water. Therefore, the correct option is option A.

Acid is a solution which releases H⁺ hydrogen ion when dissolved in water. Base are the solution which releases hydroxide ion OH⁻ ion when dissolved in water.

The balanced equation is

H₂PO\(_4\)+H₂O → H\(_3\)O+ + HPO\(_4\)²-

H₂PO\(_4\) is a acid and if we remove one hydrogen ion from this then we get an anion called conjugate base. The pair is called acid base conjugate pair. H₂O is acid over here and if we give one hydrogen ion to this then the cation that we will get is called conjugate acid. The pair is called base conjugate acid pair.

Therefore, the correct option is option A.

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The mass of 3.50 × 10²⁴ Ti atoms is 278 g. Hence, option D is correct.

Generally, molecular mass of an element is defined as the sum of the masses of the elements which are present in the molecule. Molecular mass is basically obtained by multiplying the atomic mass of an element with the number of atoms in the molecule and then adding the masses of all the elements in the molecule.

Each mole of Ti atoms contain 6.023 × 10²³ atoms.

The molecular weight of titanium is 47.88 g/mol.

So, the mass of 3.50 × 10²⁴ Ti atoms = 3.50 × 10²⁴ Ti atoms × (1 mol Ti / 6.022 x 10²³ Ti atoms) × 47.88 g Ti/(mol Ti) = 278 g

Hence, option D is correct.

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Question :

Where do most fungi thrive ?

Answer :

Fungi are found all around the world and grow in a wide range of habitats, including deserts. Most grow on land (terrestrial) environments, but several species live only in aquatic habitats. Most fungi live in either soil or dead matter, and many are symbionts of plants, animals, or other fungi.

Source :

CK-12 , Edgenuity2020