a tank contain 102 moles of gas. it has a pressure of 68 atm at a temperature of 316 K. calculate the volume of the tank in liters

Of the given options, only (a) forms a weakly acidic solution when an acid and a base are combined in stoichiometrically equivalent amounts.

Ammonium chloride (NH₄Cl), a salt that can dissociate in water to release ammonium ions (NH₄⁺) and chloride ions (Cl⁻), is created when stoichiometrically equivalent amounts of ammonia (NH₃) and hydrochloric acid (HCl) are mixed. Ammonium ions can, however, also function in water as a mild acid by giving water a proton (H⁺) in order to create hydronium ions (H₃O). As a result, the final solution will have a low acidity.

The following choices represent basic or neutral solutions:

(b) Because perchloric acid (HClO₄) and lithium hydroxide (LiOH), which are both potent acids and bases, combine to produce water and lithium perchlorate (LiClO₄), a salt that does not further dissociate in water, (b) creates a neutral solution.

(c) Because hydroiodic acid (HI) and calcium hydroxide (Ca(OH)₂) are strong acids and bases, respectively, and because of their reaction to produce calcium iodide (CaI₂) and water, which do not further dissociate in water, (c) creates a basic solution.

(d) Since strontium hydroxide (Sr(OH)₂) and nitric acid (HNO₃) are both potent acids and bases, respectively, their reaction produces strontium nitrate (Sr(NO₃)₂) and water, neither of which further dissociates in water. Therefore, (d) also produces a neutral solution.

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"Attention" is the mental process of focusing on specific elements of our surroundings while disregarding others. It involves directing our cognitive resources towards a particular stimulus and filtering out irrelevant information.

It involves the allocation of limited processing resources to enhance the processing of relevant information and inhibit the processing of irrelevant information.

Sensation, on the other hand, refers to the process of detecting physical stimuli such as light, sound, touch, taste, and smell. Exposure refers to the act of being subjected to or experiencing something, often repeatedly. Perception refers to the process of interpreting sensory information and making sense of it.

In summary, attention is the term that specifically refers to the extent to which processing activity is devoted to a particular stimulus.

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Option b. The ions and their charges in Mg3N2 are Mg2+ and N3-.

Mg3N2 is a chemical compound made up of three magnesium ions (Mg2+) and two nitrogen ions (N3-). In this compound, each magnesium ion has a positive charge of 2+ and each nitrogen ion has a negative charge of 3-.

The ions and their charges in Mg3N2 are Mg2+ and N3-.

The ions and their charges in Mg3N2 are found in option b. Mg2+ and N3-.
In the compound Mg3N2, magnesium (Mg) loses two electrons to form a stable 2+ ion, while nitrogen (N) gains three electrons to form a stable 3- ion. As a result, the correct ion charges for this compound are Mg2+ and N3-.

Hence, The correct option is b. Mg2+ and N3- are the ions and their charges in the compound Mg3N2.

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The acid-base neutralization reaction between H₂SO₄ (sulfuric acid) and KOH (potassium hydroxide) can be represented by the equation H₂SO₄ + KOH → K₂SO₄ + H₂O.

This reaction involves the combination of an acid and a base to form a salt and water. In this case, sulfuric acid (H₂SO₄) is an acid because it donates hydrogen ions (H⁺) to the reaction, while potassium hydroxide (KOH) is a base because it donates hydroxide ions (OH⁻) to the reaction.

The balanced equation for this reaction is: H₂SO₄ + 2KOH → K₂SO₄ + 2H₂O. The coefficients are added to balance the number of atoms of each element on both sides of the equation. The balanced equation shows that one molecule of sulfuric acid reacts with two molecules of potassium hydroxide to produce one molecule of potassium sulfate and two molecules of water.

It is important to note that in an acid-base neutralization reaction, the pH of the solution is neutralized, meaning it becomes less acidic or less basic, depending on the strength of the acid and the base. In the case of sulfuric acid and potassium hydroxide, the resulting solution will be neutral, with a pH of 7.

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The balanced equation:

[tex]10CO2(aq) + 2Mn^2+(aq) + 8H2O(l) → 5C2O4^{2-(aq)} + 2MnO4^{-(aq)} + 16H+(aq)[/tex]

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The buffer solution that is 0.20 M in CH3COOH and 0.20 M in NaCH3COO will exhibit the greatest change in pH when 1.0 mL of 1.5 M NaOH is added to it. Therefore option A is correct.

The buffer solution is designed to resist changes in pH when small amounts of acid or base are added. The greater the buffer capacity, the smaller the change in pH will be.

The buffer solution that is 0.20 M in CH3COOH and 0.20 M in NaCH3COO will exhibit the greatest change in pH when 1.0 mL of 1.5 M NaOH is added to it. This is because the buffer solution has a higher concentration of the weak acid CH3COOH and its conjugate base NaCH3COO, providing a greater buffer capacity.

The presence of both the weak acid and its conjugate base allows the buffer solution to effectively neutralize the added base and minimize the change in pH.

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To solve this problem, we need to use the solubility product expression for calcium iodate:

Ca(IO3)2(s) ⇌ Ca2+(aq) + 2IO3-(aq)

The solubility product constant, Ksp, is given by:

Ksp = [Ca2+][IO3-]^2

To calculate Ksp for a saturated solution of Ca(IO3)2 in 0.0100 M KIO3, we need to determine the concentrations of Ca2+ and IO3- ions at equilibrium. We assume that Ca(IO3)2 is completely dissociated and that the activity coefficients of the ions are equal to 1. Therefore, we can write:

Ca(IO3)2(s) ⇌ Ca2+(aq) + 2IO3-(aq)

Let's assume that the molar solubility of Ca(IO3)2 in this solution is s. Then, the concentrations of Ca2+ and IO3- ions at equilibrium are [Ca2+] = s and [IO3-] = 2s. Substituting these values into the Ksp expression, we get:

Ksp = [Ca2+][IO3-]^2 = s(2s)^2 = 4s^3

Now, we need to determine the value of s by using the given concentration of KIO3. Since KIO3 is a strong electrolyte, it completely dissociates in water to give K+ and IO3- ions. Therefore, the concentration of IO3- ions in the solution is equal to the concentration of KIO3, which is 0.0100 M. Using this value, we can write the following equilibrium equation for Ca(IO3)2:

Ca(IO3)2(s) ⇌ Ca2+(aq) + 2IO3-(aq)

ICE table:

I: Ca(IO3)2(s) -- -- --

C: -s +s +2s

E: s 2s --

Substituting the equilibrium concentrations into the Ksp expression, we get:

Ksp = 4s^3 = 5.12 × 10^-10

Therefore, the solubility product constant for Ca(IO3)2 in 0.0100 M KIO3 is 5.12 × 10^-10.

To calculate the molar solubility of Ca(IO3)2 in 0.020 M Ca(NO3)2, we can assume that Ca(NO3)2 is completely dissociated and that the activity coefficients of the ions are equal to 1. Therefore, we can write:

Ca(IO3)2(s) ⇌ Ca2+(aq) + 2IO3-(aq)

Let's assume that the molar solubility of Ca(IO3)2 in this solution is s. Then, the concentrations of Ca2+ and IO3- ions at equilibrium are [Ca2+] = 0.020 M and [IO3-] = 2s. Substituting these values into the Ksp expression, we get:

Ksp = [Ca2+][IO3-]^2 = (0.020)(2s)^2 = 0.08s^2

Since Ksp = 2.0 × 10^-4, we can write:

0.08s^2 = 2.0 × 10^-4

Solving for s, we get:

s = 0.0158 M

Therefore, the molar solubility of Ca(IO3)2 in 0.020 M Ca(NO3)2 is 0.0158 M.

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(4 Fe(s) + 3 O2(g) ↔ 2 Fe2O3(s) ΔH = -1650 kJ/mol) is thermodynamically favorable is: "There are more particles (including particles in the gas state) in the reactants than in the product, thus ΔS < 0.

Because ΔH is large and negative, the reaction will be thermodynamically favorable at low temperatures."

This is because there are fewer particles in the product, which results in a decrease in entropy (ΔS < 0). Since the enthalpy change (ΔH) is large and negative, the reaction is exothermic and releases energy.

At low temperatures, the reaction is thermodynamically favorable due to the combined effects of negative ΔH and low temperatures overcoming the decrease in entropy.

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When slaked lime is added to water containing magnesium ions, a precipitation reaction occurs. The slaked lime reacts with the magnesium ions to form magnesium hydroxide, which is insoluble and settles out of the water. The balanced chemical equation for this reaction is:

Ca(OH)2 + Mg2+ → Mg(OH)2(s) + Ca2+

In this equation, the slaked lime (Ca(OH)2) reacts with the magnesium ions (Mg2+) to form solid magnesium hydroxide (Mg(OH)2) and calcium ions (Ca2+).

Overall, the addition of slaked lime to water treatment helps to remove magnesium ions, which can cause hardness and other issues in water. By forming insoluble magnesium hydroxide, the ions are effectively removed from the water and the quality is improved.

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The strongest force that will determine physical properties is dipole-dipole forces.

The strongest force that will determine physical properties is hydrogen bonding.

The strongest force that will determine physical properties is London dispersion forces.

[tex]CH_3Cl[/tex]: The intermolecular forces that exist between[tex]CH_3Cl[/tex] molecules are dipole-dipole forces and London dispersion forces. The strongest force that will determine physical properties is dipole-dipole forces.

[tex]H_2[/tex]: The intermolecular force that exists between[tex]H_2[/tex] molecules is London dispersion forces. The strongest force that will determine physical properties is London dispersion forces.

HCl: The intermolecular forces that exist between HCl molecules are dipole-dipole forces and London dispersion forces. The strongest force that will determine physical properties is dipole-dipole forces.

Ne: The intermolecular force that exists between Ne atoms is London dispersion forces. The strongest force that will determine physical properties is London dispersion forces.

[tex]NH_3[/tex]: The intermolecular forces that exist between NH3 molecules are hydrogen bonding, dipole-dipole forces, and London dispersion forces. The strongest force that will determine physical properties is hydrogen bonding.

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Answer: the answer is c

Explanation: i took the test and got it right

The easiest and best source for TLV data is the ACGIH.

Among the options provided, the American Conference of Governmental Industrial Hygienists (ACGIH) is the most straightforward and reliable source for Threshold Limit Value (TLV) data.
The ACGIH is a professional organization that develops and publishes TLV data based on extensive research and expert consensus.

While the manufacturer's MSDS, TOXNET, and the OSHA website can provide TLV data, the ACGIH is specifically dedicated to establishing these values and is frequently updated.

Hence,  In conclusion, the ACGIH is the easiest and best source for obtaining accurate TLV data among the provided options.

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Answer:

ionic compound

Explanation:

When two ions come together to form a compound, they form an ionic compound. Ionic compounds are made up of positively charged ions (cations) and negatively charged ions (anions) that are held together by electrostatic attraction.

For example, sodium chloride (NaCl) is an ionic compound formed when a sodium ion (Na+) and a chloride ion (Cl-) come together. The sodium ion loses an electron to become a positively charged ion, while the chloride ion gains an electron to become a negatively charged ion. The oppositely charged ions attract each other, forming a crystal lattice structure.

Other examples of ionic compounds include magnesium oxide (MgO), potassium iodide (KI), and calcium carbonate (CaCO3).

The rate at which atoms of radioactive sources, or radionuclides, disintegrate is measured in curies. A curie is a unit of measure for the amount of radioactive material present. It represents the amount of radioactive material in which 37 billion atoms disintegrate per second.

The disintegration of radionuclides produces ionizing radiation, which can be measured in rems or roentgens.

A rem is a unit of measurement for the amount of ionizing radiation absorbed by living tissue, while a roentgen is a unit of measurement for the amount of ionizing radiation in the air.
In summary, the rate at which atoms of radioactive sources disintegrate is measured in curies, while the amount of ionizing radiation produced by the disintegration can be measured in rems or roentgens. It is important to understand these units of measurement in order to properly monitor and regulate exposure to ionizing radiation, as it can have harmful effects on living organisms.

The rate at which atoms of radioactive sources (radionuclides) disintegrate is measured in curies (c).
To explain further, radioactive sources contain unstable atoms, called radionuclides. These radionuclides undergo disintegration or decay, during which they emit radiation. To quantify this process, we use various units.
Curies (Ci) is a unit of measurement specifically used to express the activity of a radioactive substance, or how quickly atoms in the radioactive source are disintegrating. One curie represents 37 billion disintegrations per second.

It's important to note the other units you mentioned:
- Rems (roentgen equivalent in man) is a unit used to measure the biological impact of ionizing radiation on human tissue.
- Roentgens (R) is a unit used to measure the exposure to ionizing radiation, specifically the amount of radiation that produces a certain amount of ionization in air.
- Rods is not a unit related to radioactivity, but might be confused with control rods, which are used in nuclear reactors to control the rate of nuclear reactions.

In summary, the appropriate unit for measuring the rate at which atoms of radioactive sources disintegrate is curies.

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To determine the order of the reaction with respect to the ligand and substrate, we can use the method of initial rates.

For the substrate, we keep the concentration of the ligand constant at 1.0 M and vary the substrate concentration to get the following initial rates:

[substrate] (M) | [ligand] (M) | rate (M/s)
--- | --- | ---
1.0 | 1.0 | 5
5.0 | 1.0 | 25
10.0 | 1.0 | 50

When we double the substrate concentration from 5.0 M to 10.0 M, we see that the rate of the reaction also doubles. This suggests that the reaction is first order with respect to the substrate.

For the ligand, we keep the concentration of the substrate constant at 5.0 M and vary the ligand concentration to get the following initial rates:

[substrate] (M) | [ligand] (M) | rate (M/s)
--- | --- | ---
5.0 | 1.0 | 25
5.0 | 5.0 | 125
5.0 | 25.0 | 625

When we increase the ligand concentration from 1.0 M to 5.0 M, we see that the rate of the reaction increases by a factor of 5. When we increase the ligand concentration from 5.0 M to 25.0 M, we see that the rate of the reaction increases by a factor of 5 again. This suggests that the reaction is second order with respect to the ligand.

Therefore, the rate equation for this reaction is:

Rate = k [substrate]^1 [ligand]^2

where k is the rate constant.

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The federal agency is responsible for overseeing the disposal of hazardous waste is the Environmental Protection Agency b. (EPA). The EPA is an essential government organization in the United States that protects human health and the environment by developing and enforcing regulations related to pollution and waste management.

It operates under the authority of federal laws, such as the Resource Conservation and Recovery Act (RCRA), which provides guidelines for the proper management and disposal of hazardous waste.
While the EPA is the primary agency in charge of hazardous waste management, other federal agencies like the Occupational Safety and Health Administration (OSHA), the Chemical Safety Board (CSB), and the Department of Energy (DOE) also play significant roles in ensuring the safe handling of hazardous materials.
OSHA is responsible for establishing and enforcing workplace safety standards, including those for handling hazardous waste. It aims to protect the health and safety of workers who may come into contact with dangerous substances.
The CSB is an independent federal agency that investigates industrial chemical accidents, with the goal of improving chemical safety and preventing similar incidents. While it does not have regulatory authority, its findings and recommendations help inform regulations and best practices.
The DOE is primarily focused on energy policy and research, but it also manages nuclear waste disposal and works to ensure the safe storage and handling of nuclear materials.
In summary, the EPA is the primary federal agency overseeing the disposal of hazardous waste, while OSHA, CSB, and DOE play essential roles in regulating and ensuring the safe handling of hazardous materials.

The complete question is:-

What federal agency oversees the disposal of hazardous waste?

a. OSHA

b. EPA

c. CSB

d. DOE

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The complete mechanism involves protonation of acetone, bromination of the protonated acetone, and deprotonation of the brominated intermediate. The curved arrows indicate the movement of electrons during these reactions.

1. Identify the reactants: Acetone (CH3COCH3) and Bromine (Br2).
2. In the presence of an acid, acetone becomes protonated, forming a resonance-stabilized cation: CH3COCH3 + H+ → CH3COCH2+ + H2O.
3. The protonated acetone reacts with bromine, forming a brominated intermediate: CH3COCH2+ + Br2 → CH3COCH2Br+ + Br-.
4. The brominated intermediate then loses a proton to complete the reaction: CH3COCH2Br+ + H2O → CH3COCH2Br + H3O+.

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The net ionic equation for ammonia (NH₃) and phosphoric acid (H₃PO₄) is:

NH₃ + H₃PO₄ → NH₄+ + H₂PO₄-

The complete ionic equation, which includes all the ions in the reaction, is:

NH₃ + 3H+ + 3HO₄- → NH₄+ + 3H₂PO₄-

However, in the net ionic equation, the spectator ions (the ions that do not participate in the reaction) are removed, which are H+ and HO₄-. Therefore, the net ionic equation only includes the ions that are involved in the chemical change, which are NH₃, H₃PO₄, NH₄+, and H₂PO₄-.

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The formula of the hydrated compound is [tex]CaCl_{2} . 2H_{2}O,[/tex] which is also known as calcium chloride dihydrate.

To determine the formula of the hydrated compound formed when 3.62 g of anhydrous calcium chloride absorbs 1.17 g of water, we need to use the law of definite proportions, which states that the elements in a compound are always present in a fixed ratio by mass.

First, we need to find the moles of anhydrous calcium chloride and water absorbed:

Moles of [tex]CaCl_{2}[/tex] = 3.62 g / 110.98 g/mol = 0.0326 mol

Moles of [tex]H_{2}O[/tex] = 1.17 g / 18.02 g/mol = 0.0649 mol

Next, we need to determine the mole ratio of anhydrous calcium chloride to water in the hydrated compound. To do this, we can divide both moles by the smaller mole value:

Moles of [tex]CaCl_{2}[/tex] / 0.0326 = 1

Moles of [tex]H_{2}O[/tex] / 0.0326 = 1.99

The mole ratio of [tex]CaCl_{2}[/tex] to [tex]H_{2}O[/tex] is approximately 1:2, indicating that the hydrated compound is likely a dihydrate.

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Panch Tattva refers to the five basic elements of nature - earth, water, air, fire, and space. To write a project report on this topic, you can follow the below-mentioned steps:

Introduction - Begin your report by introducing the concept of Panch Tattva and its importance in Hinduism and other religions.

Earth - Describe the element earth and its significance. Discuss the properties, uses, and importance of earth in our daily lives.

Water - Discuss the element water and its significance. Describe the properties, uses, and importance of water in our daily lives.

Air - Discuss the element air and its significance. Describe the properties, uses, and importance of air in our daily lives.

Fire - Discuss the element fire and its significance. Describe the properties, uses, and importance of fire in our daily lives.

Space - Discuss the element space and its significance. Describe the properties, uses, and importance of space in our daily lives.

Conclusion - Summarize the importance of Panch Tattva and its relevance in our daily lives.

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The reaction between phenylmagnesium bromide (PhMgBr) and benzophenone to form triphenylmethanol involves nucleophilic addition.

Here is the mechanism for this reaction:

1. Nucleophilic attack: The lone pair of electrons on the oxygen atom of benzophenone attacks the electrophilic carbon of phenylmagnesium bromide, forming a new bond and creating a tetrahedral intermediate.

PhMgBr + C₆H₅C(O)Ph -> Ph₃C-O-MgBr

2. Proton transfer: A proton transfer occurs from the oxygen atom to the magnesium ion, resulting in the formation of triphenylmethanol and regeneration of the phenylmagnesium bromide.

Ph₃C-O-MgBr + H₂O -> Ph₃C-OH + MgBrOH

On the other hand, the nucleophilic substitution reaction of phenylmagnesium bromide with ethyl benzoate to form triphenylmethanol proceeds through a different mechanism. Here is the mechanism for this reaction:

1. Nucleophilic attack: The nucleophilic carbon of phenylmagnesium bromide attacks the electrophilic carbon of the ester group in ethyl benzoate, forming a new bond and creating a tetrahedral intermediate.

PhMgBr + C₆H₅CO₂Et -> Ph-C(O)OC₆H₅-MgBr

2. Elimination: The alkoxide ion (OR-) formed from the tetrahedral intermediate eliminates the ethoxide ion (EtO-) through intramolecular proton transfer, resulting in the formation of triphenylmethanol.

Ph-C(O)OC₆H₅-MgBr + EtOH -> Ph₃C-OH + EtOMgBr

The reactivity difference arises from the electrophilic nature of the carbonyl carbon in the reactants. In benzophenone, the presence of electron-withdrawing aryl groups increases its electrophilicity, favoring nucleophilic addition. In ethyl benzoate, the electron-donating ethyl group reduces the electrophilicity of the ester carbonyl carbon, favoring nucleophilic substitution.

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The percent weight by volume of phosphoric acid in the assigned cola is 0.263% (w/v).

To calculate the percent weight by volume of phosphoric acid in the assigned cola,  need to follow these steps:

Determine the molecular weight of phosphoric acid, which is H₃PO₄ The atomic weights are: H=1, P=31, O=16. Therefore, the molecular weight of [tex]H_3PO_4[/tex] is:

MW(H₃PO₄) = 3 x MW(H) + MW(P) + 4 x MW(O)

= 3 x 1 + 31 + 4 x 16

= 98 g/mol

Calculate the amount of phosphoric acid in the cola sample used in the titration. Let's assume  used 25 mL of the cola sample for the titration, and  found that it required 35 mL of 0.1 M sodium hydroxide solution to reach the second equivalence point, and 15 mL to reach the first equivalence point. The difference between these volumes is:

35 mL - 15 mL = 20 mL

This means that 20 mL of 0.1 M sodium hydroxide solution reacted with the phosphoric acid in the cola sample.

From the balanced chemical equation for the reaction between phosphoric acid and sodium hydroxide,  know that 1 mole of H₃PO₄ reacts with 3 moles of NaOH. Therefore, the amount of H₃PO₄ in the cola sample is:

(20 mL x 0.1 mol/L) / 3 = 0.67 mmol

And the mass of [tex]H_3PO_4[/tex] in the cola sample is:

0.67 mmol x 98 g/mol = 65.66 mg

Calculate the weight by volume percent of phosphoric acid in the cola sample. Since  used 25 mL of the cola sample for the titration, the weight by volume percent of phosphoric acid is:

(65.66 mg / 25 mL) x 100% = 0.263% (w/v)

Therefore, the percent weight by volume of phosphoric acid in the assigned cola is 0.263% (w/v).

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Petroleum, being a fossil fuel, is spread unevenly throughout the earth's crust. Hence, option d is the correct answer: spread unevenly, with some places having none.

The distribution of petroleum is largely dependent on the geological history of an area, with areas that were once under ancient oceans or lakes having a higher likelihood of containing petroleum deposits. This has led to countries such as Saudi Arabia, Venezuela, and Canada having large reserves of petroleum, while other regions such as Europe and Africa have smaller reserves or none at all. The uneven distribution of petroleum has significant economic and geopolitical implications, with countries that possess large reserves having greater global influence and wealth.

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The pressure of the 19 L container, given that it contains 25 moles of gas at 0 °C is 29.49 atm

First, we shall list out the given parameters from the question. This is shown below:

The pressure of the container can be obtain as follow:

PV = nRT

P × 19 = 25 × 0.0821 × 273

P × 19 = 560.3325

Divide both sides by 19

P = 560.3325 / 19

P = 29.49 atm

Thus, we can conclude that the pressure of the container is 29.49 atm

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The order of increasing stability of the carbonyl functional group is e < c < a < d < b..

Carbonyl is an organic compound that contains a carbon-oxygen double bond (C=O). This double bond is one of the most important functional groups in organic chemistry, as it exists in a variety of compounds and can undergo a wide range of reactions. The carbonyl group is composed of a carbon atom bonded to an oxygen atom that is doubly bonded to the carbon atom. This double bond gives the carbonyl group special reactivity, as the electrons in the double bond can be used to form new bonds with other atoms.

This is because the compounds with the most electron-withdrawing groups on the carbonyl carbon are the most stable. Compound e is the most stable, as it has a triple bond on the carbonyl carbon. Compound c is the next most stable, as it has a halogen (Cl) substituent on the carbonyl carbon. Compound a is the third most stable, as it has an ether group on the carbonyl carbon. Compound d is the fourth most stable, as it has an alkyl group on the carbonyl carbon. Finally, compound b is the least stable, as it has no substituents on the carbonyl carbon.The correct answer is  e < c < a < d < b .

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The presence of 18O in the ortho-carboxy-substituted phenol indicates that the ortho-carboxy group is an intramolecular nucleophilic catalyst in the hydrolysis of aspirin, while the absence of 18O indicates that the ortho-carboxy group is an intramolecular general-base catalyst.

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Acetylsalicylic acid is a weak acid, so we need to use the Ka value to find the concentration of hydroxide ions. Ka of acetylsalicylic acid (HC₉H₇O₄) is 3.27 × 10⁻⁴ The hydroxide ion concentration of an aqueous solution of 0. 522 M hypochlorous acid is M [OH⁻-]= 2.28 ×  10⁻⁴ M

HC₉H₇O₄ + H₂O ⇌ H₃O+ + C₉H₇O₄⁻

Initial: 0.522 M 0 0

Change: -x +x +x

Equilibrium: 0.522 - x x x

Ka = [H₃O+][C₉H₇O₄⁻] / [HC₉H₇O₄]

3.27 × 10⁻⁴ = [tex]x^2[/tex] / (0.522 - x)

As x is very small compared to 0.522, we can approximate the denominator to be 0.522:

3.27 × 10⁻⁴ =[tex]x^2[/tex] / 0.522

x = 1.13 × 10⁻³ M

pOH = -log [OH⁻]

pOH = -log (1.13 × 10⁻³)

pOH = 2.95

The hydroxide ion concentration of an aqueous solution of hypochlorous acid (HOCl) can be found using the Kb value. We can use the fact that Kw = Ka × Kb to find Kb for HOCl.

Kw = Ka × Kb

1.0 × 10⁻¹⁴ = 3.0 × 10⁻⁸ × Kb

Kb = 3.33 × 10⁻⁷

HOCl + H₂O ⇌ H₃O+ + OCl⁻

Initial: 0.522 M 0 0

Change: -x +x +x

Equilibrium: 0.522 - x x x

Kb = [OH⁻][OCl⁻] / [HOCl]

3.33 × 10⁻⁷ = x² / (0.522 - x)

As x is very small compared to 0.522, we can approximate the denominator to be 0.522:

3.33 × 10⁻⁷ =[tex]x^2[/tex]/ 0.522

x = 2.28 ×  10⁻⁴ M

[OH⁻] = 2.28 ×  10⁻⁴ M

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Answer:

Both crayon melting in the sun and beating an egg are examples of physical changes. In both cases, the chemical composition of the substances does not change. Instead, the changes are physical in nature. When a crayon melts in the sun, it changes from a solid to a liquid, but it is still made up of the same molecules. Similarly, when an egg is beaten, it changes from a liquid to a mixture of liquids and solids, but the chemical composition of the egg does not change.

Explanation:

The amount of Faradays and moles of electrons are required to produce by electrolysis are calculated thus.

(a) The molar mass of Al is 26.98 g/mol, which means that one mole of Al will require 3 moles of electrons to be produced. To find out the number of Faradays needed to produce 2.70 g of Al, calculate the number of moles of Al:

moles of Al = mass of Al / molar mass of Al

moles of Al = 2.70 g / 26.98 g/mol

moles of Al = 0.100 mol

Faraday's law of electrolysis to calculate the number of Faradays needed:

Faradays = moles of substance / n

n = number of electrons per mole of substance

n for Al is 3, so:

Faradays = 0.100 mol / 3

Faradays = 0.0333 F

Therefore, 0.0333 Faradays are needed to produce 2.70 g of Al.

(b) The molar mass of Mg is 24.31 g/mol, which means that one mole of Mg will require 2 moles of electrons to be produced. To find out the number of Faradays needed to produce 6.0 g of Mg, calculate the number of moles of Mg:

moles of Mg = mass of Mg / molar mass of Mg

moles of Mg = 6.0 g / 24.31 g/mol

moles of Mg = 0.247 mol

Use Faraday's law of electrolysis to calculate the number of Faradays needed:

Faradays = moles of substance / n

n = number of electrons per mole of substance

n for Mg is 2, so:

Faradays = 0.247 mol / 2

Faradays = 0.1235 F

Therefore, 0.1235 Faradays are needed to produce 6.0 g of Mg.

(c) The molar mass of H₂ is 2.02 g/mol, which means that one mole of H₂ will require 2 moles of electrons to be produced. To find out the number of Faradays needed to produce 10 g of H₂, calculate the number of moles of H₂:

moles of H₂ = mass of H₂ / molar mass of H₂

moles of H₂ = 10 g / 2.02 g/mol

moles of H₂ = 4.95 mol

Now use Faraday's law of electrolysis to calculate the number of Faradays needed:

Faradays = moles of substance / n

n = number of electrons per mole of substance

n for H₂ is 2, so:

Faradays = 4.95 mol / 2

Faradays = 2.475 F

Therefore, 2.475 Faradays are needed to produce 10 g of H₂.

(d) The molar mass of Cl₂ is 70.91 g/mol, which means that one mole of Cl₂ will require 2 moles of electrons to be produced. To find out the number of Faradays needed to produce 71 g of Cl₂, calculate the number of moles of Cl₂:

moles of Cl₂ = mass of Cl₂ / molar mass of Cl₂

moles of Cl₂ = 71 g / 70.91 g/mol

2 (a) To produce 27g of Al by electrolysis, calculate the number of moles of Al and then use the equation:

1 mole of Al + 3 moles of e⁻ → 1 mole of Al³⁺

Molar mass of Al = 27 g/mol

Number of moles of Al = 27 g / 27 g/mol = 1 mole

Therefore, 3 moles of electrons are required to produce 1 mole of Al.

To produce 27g of Al:

3 moles of e⁻ / 1 mole of Al × 1 mole of Al = 3 moles of e⁻

So, 3 moles of electrons are required to produce 27g of Al by electrolysis.

(b) To produce 8g of O₂ by electrolysis, calculate the number of moles of O₂ and then use the equation:

2 moles of H₂O + electricity → 2 moles of H₂ + 1 mole of O₂

Molar mass of O₂ = 32 g/mol

Number of moles of O₂ = 8 g / 32 g/mol = 0.25 mole

Therefore, 0.5 moles of electrons are required to produce 0.25 mole of O₂.

To produce 0.25 mole of O₂:

0.5 moles of e⁻ / 1 mole of O₂ × 0.25 mole of O₂ = 0.125 moles of e⁻

So, 0.125 moles of electrons are required to produce 8g of O₂ by electrolysis.

Find out more on Faradays here: https://brainly.com/question/1640558

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Answer:

Diagram A

Explanation:

Diagram A shows that there is a lower activation energy (arrow indicated at X). When there is a lower activation energy, it means that the reactants can convert into products at a faster rate so overall, there is an increased rate of reaction.

Whereas Diagram B has a much larger activation energy so more energy will be needed to convert products into reactants.