If you are given 36 moles of HCI (hydrochloric acid), how many moles of magnesium chloride
will be produced?

Answers

Answer 1


2HCl + Mg -> MgCl2 + H2

The balanced chemical equation shows that 1 mole of magnesium reacts with 2 moles of hydrochloric acid to produce 1 mole of magnesium chloride and 1 mole of hydrogen gas.

Therefore, if you have 36 moles of hydrochloric acid, you would need 18 moles of magnesium to react with all of it, and this would produce 18 moles of magnesium chloride.

Related Questions

PART OF WRITTEN EXAMINATION:
In an anodic process:
A) positively charged ions leave the anode and enter the electrolyte
B) Electrons flow through the electronic path cathode to anode
C) negatively charged ions leave the anode and enter the electrolyte
D) ions become atoms

Answers

In an anodic process: A) positively charged ions leave the anode and enter the electrolyte. In an anodic process, the anode is the electrode where oxidation occurs.

Oxidation involves the loss of electrons, so the anode loses electrons and becomes positively charged. As a result, positively charged ions (also known as cations) leave the anode and enter the electrolyte, which is the solution or medium surrounding the electrodes. This process is essential for many electrochemical reactions and is a fundamental principle in electrochemistry. The flow of electrons through the electronic path from the cathode to the anode is known as the cathodic process, which is the opposite of the anodic process.

Therefore, the correct answer is A) positively charged ions leave the anode and enter the electrolyte.

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Chemistry help!!!! Answer all the blank please and thanks! (WIll give brainliest)

Answers

Boric acid is a monoprotic and Lewis acid. B(OH)[tex]_3[/tex] + H[tex]_2[/tex]O ⇌ [BO(OH)[tex]_2[/tex]]− + H[tex]_3[/tex]O+ and HBO[tex]_2[/tex] + H[tex]_2[/tex]O ⇌ [BO[tex]_2[/tex]]− + H[tex]_3[/tex]O+ are the reactions for ionisation of boric acid.

In particular, orthoboric acid is a boron, oxygen, plus hydrogen chemical having the formula B(OH)3. Trihydroxidoboron, hydrogen orthoborate, and boracic acid are other names for it. It occurs naturally as the substance known as sassolite and is typically found as colourless crystals.

A white powder that dissolves in water. It is a weak acid that can react using alcohols to produce borate esters as well as a variety of borate anions and salts. Boric acid is a monoprotic and Lewis acid. B(OH)[tex]_3[/tex] + H[tex]_2[/tex]O ⇌ [BO(OH)[tex]_2[/tex]]− + H[tex]_3[/tex]O+ and HBO[tex]_2[/tex] + H[tex]_2[/tex]O ⇌ [BO[tex]_2[/tex]]− + H[tex]_3[/tex]O+ are the reactions for ionisation of boric acid.

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How do ions in a crystal matrix interact?

Answers

Ions in a crystal matrix interact through a combination of ionic bonds and electrostatic interactions. In a crystal, the ions are arranged in a highly ordered, repeating pattern called a lattice, with each ion surrounded by a fixed number of neighboring ions.

Each ion in the lattice is drawn to the ions nearby that have opposite charges, forming a web of potent ionic connections. The crystal's rigidity and sturdiness are due to this. The stability of the crystal lattice is also influenced by the electrostatic interactions between ions.

The interactions between ions in a crystal lattice are quite particular and are influenced by the size, charge, and arrangement of the ions in the lattice overall.

An ionic molecule like sodium chloride (NaCl), for instance, exhibits a regular, repeating pattern of attraction between the positively charged sodium ions (Na+) and the negatively charged chloride ions (Cl-).

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whats the answer to this. me and my class are all stuck

Answers

The iodide ion is denoted by the sign I-. This ion has a charge of -1, as indicated by the minus sign, which implies it has one more electron than the iodine atom (I), which is neutral.

Iodine (I), whose atomic number is 53, has 53 electrons in its neutral state. The iodide ion, which has a charge of -1, is created when an iodine atom gains one electron. The iodide ion (I-) therefore has 54 electrons :

53 electrons from the neutral iodine atom + 1 additional electron gained when it becomes an ion = 54 electrons in the iodide ion.

Всё легко и просто, удачи.

Answer:

The answer would be 8 electrons

As the element would want to complete its valence shell with "8 electrons", it will gain electrons hence attaining a negative charge

The "negative sign only" also shows that this element gained 1 electron so we can conclude that this element is in group VII A (Group 7 A elements gain 1 electron to complete their valence shell)

If two atoms are joined by a polar covalent bond, the atom with the lower electronegativity will have a partial ______ , Incorrect Unavailable charge.

Answers

If two atoms are joined by a polar covalent bond, the atom with the lower electronegativity will have a partial positive charge.

If two atoms are joined by a polar covalent bond, the atom with the lower electronegativity will have a partial positive charge. In a polar covalent bond, electrons are shared unequally between the two atoms, leading to a difference in charge across the bond.

The atom with the higher electronegativity attracts the shared electrons more strongly, resulting in a partial negative charge on that atom, while the atom with lower electronegativity has a partial positive charge.

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Physical symptoms when they stop use of a substance
-A severely negative physiological reaction to removal of a psychoactive substance, which can be alleviated by the same or a similar substance

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When an individual stops using a substance, a severely negative physiological reaction to removal of a psychoactive substance, which can be alleviated by the same or a similar substance, they may experience physical symptoms known as withdrawal.

Withdrawal occurs due to a severely negative physiological reaction to the removal of a psychoactive substance, which can be alleviated by the same or a similar substance. The body and brain become dependent on the substance to function normally, and when the substance is removed, the person experiences discomfort as the body tries to readjust. Physical symptoms of withdrawal can vary depending on the substance used, the duration of use, and individual factors. Common symptoms may include headaches, nausea, sweating, tremors, insomnia, and muscle aches. In more severe cases, withdrawal symptoms can be life-threatening, such as seizures, hallucinations, and extreme agitation.

It is essential to seek professional help when attempting to stop the use of a substance, as some withdrawal symptoms may require medical supervision and intervention. Treatment options for managing withdrawal symptoms may include medications to alleviate specific symptoms, counseling and support groups to help with the emotional aspects of withdrawal, and, in some cases, substitution therapy with a less harmful substance to gradually reduce the body's dependence on the original substance. By addressing both the physical and psychological aspects of withdrawal, individuals can increase their chances of successfully stopping substance use and maintaining long-term recovery.

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a liquid is less fluid than a gas because 9 of 10. select choice attractions interfere with the ability of particles to flow past one another. T/F

Answers

The given statement "A liquid is less fluid than a gas because 9 of 10. select choice attractions interfere with the ability of particles to flow past one another" is True.

A liquid is less fluid than a gas because of the intermolecular attractions that exist between its particles. In liquids, the molecules are more closely packed and have stronger intermolecular forces compared to gases. These intermolecular attractions interfere with the ability of the particles to flow past one another, making liquids less fluid than gases.

In gases, the particles are farther apart, and the intermolecular forces are weaker. The weak intermolecular forces between gas particles allow them to move freely and quickly, resulting in high fluidity. The particles can easily slide past one another, and the gas can fill any container it is placed in.

Therefore, due to the strong intermolecular forces present in liquids, their particles cannot flow past each other as easily as gas particles can. This results in liquids being less fluid than gases, and they take the shape of the container in which they are placed. In summary, the statement "a liquid is less fluid than a gas because 9 of 10 select choice attractions interfere with the ability of particles to flow past one another" is true.

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Which property describes observable characteristics of matter like color?

Chemical Property

Physical Property

Reactivity

Sublimation

Answers

chemical property because it reacts differently when you put an object into a substance with things from the periodic table if you put a nail in water it rusts that’s a chemical property

Potential
Energy
(kJ)
70
40
20
1. What is the activation energy for this reaction?
2. What is the change in energy for this reaction?
3. Is it exothermic or endothermic?
4. What letter represents the products?
er represents the reactants?
B
Reaction
Coordinate

Answers

1. The activation energy for the reaction is 30 KJ

2. The change in energy for the reaction is -20 KJ

3. The reaction is exothermic

4. The letter that represents the products is B

5. The letter that represents the reactants is A

1. How do i determine the activaition energy?

The activation energy for the reaction can be obtained as follow:

Energy of reactant = 40 KJPeak energy = 70 KJActivation energy = ?

Activation energy = Peak energy - Energy of reactant

Activation energy = 70 - 40

Activation energy = 30 KJ

2. How do i determine the change in energy?

The change in energy can be obtain as follow:

Energy of reactant = 40 KJEnergy of product = 20 KJChange in energy = ?

Change in energy = Energy of product - energy of reactant

Change in energy = 20 - 40

Change in energy = -20 KJ

3. How do i know if the reaction is exothermic or endothermic?

From the above calculation, we can see that the change in energy is negative (i.e -20 KJ).

Thus, we can conclude that the reaction is exothermic reaction.

4. How do i know which letter represents product?

The letter which represents products given the energy diagram is letter B

5. How do i know which letter represents reactants?

The letter which represents reactants given the energy diagram is letter A

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look up the chemical formula for citric acid and determine if it is strong or weak. then complete the sentence below. when entering the molecular formula, enter only integer values. if an element is not present in the formula enter a zero in the corresponding box

Answers

The chemical formula for citric acid is C₆H₈O₇. Citric acid is a weak acid.

Sentence: Citric acid has a chemical formula of C₆H₈O₇ and is classified as a weak acid.

Citric acid is a weak organic acid, with a molecular formula of C₆H₈O₇. It is found naturally in citrus fruits and many other fruits and vegetables, and is commonly used as a food additive and flavoring agent.

Citric acid is classified as a weak acid because it does not completely dissociate in aqueous solution. When citric acid dissolves in water, some of the molecules donate a proton (H⁺) to water molecules to form hydronium ions (H₃O⁺), while others remain as undissociated molecules. The equilibrium between the undissociated molecules and the hydronium ions can be described by the following equation:

C₆H₈O₇ + H₂O ⇌ C₆H₇O₇⁻ + H₃O⁺

In this equation, C₆H₈O₇ represents undissociated citric acid, C₆H₇O₇⁻ represents the citrate ion, and H₃O⁺ represents hydronium ions.

The dissociation of citric acid is incomplete, meaning that only a fraction of the citric acid molecules dissociate in aqueous solution. The strength of an acid is related to the extent of dissociation, so weak acids like citric acid have a relatively small dissociation constant (Ka) compared to strong acids.

The Ka for citric acid is approximately 8.4 × 10⁻⁴ at 25°C, indicating that only a small fraction of the citric acid molecules dissociate in aqueous solution. This is why citric acid is classified as a weak acid.

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How is it possible that water can exist in three different states of matter in the same area? How might this be significant for the distribution of thermal energy on earth

Answers

The thermal energy distribution of the water molecules may be shown using statistical thermodynamics. Even at a temperature of 0 degrees Celsius, water molecules will have enough energy to evaporate at a certain point.

These two factors allow for the simultaneous existence of water as a solid, liquid, and gas. In other words, the only temperature at which water can exist in all three forms of matter—solid (ice), liquid (water), and gas (water vapour)—is known as the triple point of water.

This is a 0.01°C temperature.  Ice, steam, and water can all be present in the same container at the same time when the pressure is low. The term "triple point" refers to a substance's intersection of temperature and pressure.

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19) While watching the news one night, you see a commercial for a new vehicle that will be powered
by water. This will be accomplished by passing electricity through water, producing pure oxygen
and pure hydrogen. These two gases will then be mixed together and ignited. This process of
passing electricity through a substance to separate molecules is called
A) electrochemistry
C) electrolysis
B) electrorefining
D) electroplating

Answers

The process of passing electricity through a substance to separate molecules is called electrolysis. Option C is correct.

Electrolysis is a process in which an electric current is passed through a conducting medium (such as a liquid or a molten electrolyte) in order to bring about a chemical change. It involves the use of electrical energy to drive a non-spontaneous redox reaction, causing the decomposition or transformation of substances at the electrodes.

Electrolysis has a wide range of applications in various industries. For example, it is used in the extraction of metals from their ores, such as the production of aluminum from bauxite, or the extraction of copper from copper ores.

Electrolysis plays a crucial role in many technological advancements and industrial processes, making it an important area of study in the field of electrochemistry. It has widespread applications in fields such as metallurgy, chemical industry, energy production, and environmental remediation.

Hence, C. is the correct option.

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A chemist needs to neutralize 349 L of HF solution that has a molarity of 3.6 M. She currently has an NaOH solution with a molarity of 5.4 M. How many liters of her NaOH solution would she need to neutralize the HF? The chemical equation for this reaction is HF + NaOH → NaF + H2O. I need the answer in 20 ish minutes! Please help!

Answers

Answer:get pranked

Explanation:A chemist needs to neutralize 349 L of HF solution that has a molarity of 3.6 M. She currently has an NaOH solution with a molarity of 5.4 M. How many liters of her NaOH solution would she need to neutralize the HF? The chemical equation for this reaction is HF + NaOH → NaF + H2O. I need the answer in 20 ish minutes! Please help!

Sure, I'd be happy to help! Based on the chemical equation you provided, one mole of HF reacts with one mole of NaOH to form one mole of NaF and one mole of water.

To calculate the number of moles of HF in 349 L of 3.6 M solution, we can use the formula:

moles of solute = molarity x volume in liters

So, moles of HF = 3.6 M x 349 L = 1256.4 moles of HF

Because the reaction is a 1:1 ratio between HF and NaOH, we would need the same number of moles of NaOH to neutralize the HF.

Therefore, we can find the number of liters of 5.4 M NaOH solution needed using the formula:

moles of NaOH = moles of HF

5.4 M x volume of NaOH solution in liters = 1256.4 moles of NaOH

volume of NaOH solution in liters = 1256.4 moles of NaOH / 5.4 M

volume of NaOH solution = 232.3 L

So, the chemist would need approximately 232.3 L of 5.4

SRB (sulfate reducing bacteria)
A) descrease the corrosion of metal pipe in clay environments
B) decrease the corrosion in all environments
C) accelerate corrosion of metal pipe in clay environments

Answers

The SRB (sulfate-reducing bacteria) is a type of bacteria that can reduce sulfate to sulfide. These bacteria can have an impact on the corrosion of metal pipes in various environments. Among the given options C) Accelerate corrosion of metal pipe in clay environments.



The SRB can accelerate the corrosion of metal pipes in clay environments. In these environments, the bacteria produce sulfide, which reacts with the metal surface, forming metal sulfides. This process leads to a localized breakdown of the protective film on the metal surface, exposing the underlying metal to further corrosion. Clay environments provide a suitable habitat for SRB, as they offer the necessary nutrients and anaerobic conditions that these bacteria require to thrive. Consequently, the presence of SRB in clay environments can increase the rate of corrosion of metal pipes, leading to potential failure and the need for costly repairs or replacement.

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Biomonitoring is the process of measuring the
- Concentration of microbiological species (viruses and bacteria) in the air
- Concentration of microbiological species (viruses and bacteria) in the water
- Chemicals in human tissue or fluids
- Death rate of scientists working in laboratories

Answers

Biomonitoring is a process that involves measuring various parameters to assess exposure and potential health effects. These parameters include the concentration of microbiological species such as viruses and bacteria in the air and water.

Additionally, scientists working in laboratories may monitor the death rate of these species to better understand their behavior and impact on human health. Biomonitoring can also involve measuring the concentration of chemicals in human tissue or fluids to assess exposure levels and potential health effects.

By monitoring these various parameters, researchers can better understand potential health risks and develop strategies to mitigate them, Biomonitoring is the process of measuring the concentration of chemicals in human tissue or fluids. This process helps assess the levels of exposure to various chemicals and their potential effects on human health.

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which of the following refers to the extent to which processing activity is devoted to a particular stimulus. question 65 options: sensation exposure attention perception

Answers

"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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given 4 molecules of hydrogen gas and 2 molecules of chlorine gas to form hydrogen chloride. sketch a particle diagran that represents the reaction container before and after the reaction.

Answers

Hydrogen chloride is considered a gas that is created when hydrogen gas and chlorine gas react and blend  together.

The required balanced chemical equation for the given question is

H₂(g) + Cl₂(g) → 2HCl(g)

Hydrogen chloride (HCl) is a type compound that includes the  elements hydrogen and chlorine, which is a gas at room temperature and pressure.

Hence, the particle diagram for the reaction container before the reaction would contain four hydrogen molecules (each consisting of two hydrogen atoms) and two chlorine molecules (each consisting of two chlorine atoms) as separate particles.

TheThe particle diagram for the reaction container after the reaction would contain two hydrogen chloride molecules (each consisting of one hydrogen atom and one chlorine atom) as separate particles.

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2. calculate the density of co2 gas at stp based on your experiment. compare this density with that of air at stp (1.29 g/l). briefly comment on the probable validity of the assumption that the air in the flask is displaced by the co2 gas.

Answers

The density of CO2 gas at STP is 1.89 g/L.

To calculate the density of Carbon dioxide gas at stp (Standard Temperature and Pressure), we need to know the molar mass of Carbon dioxide, which is 44.01 g/mol. At STP, the pressure is 1 atm and the temperature is 0°C or 273.15 K. Using the ideal gas law (PV = nRT), we can calculate the number of moles of Carbon dioxide in the flask:

n = PV/RT = (1 atm) x (22.4 L)/[(0.08206 L•atm/K•mol) x (273.15 K)] = 0.965 moles

The mass of Carbon dioxide in the flask is then:

m = n x M = 0.965 moles x 44.01 g/mol = 42.42 g

The volume of the flask is 22.4 L, so the density of Carbon dioxide gas at STP is:

ρ = m/V = 42.42 g/22.4 L = 1.89 g/L

This density is higher than that of air at stp, which is 1.29 g/L. This means that Carbon dioxide gas is more dense than air and will tend to sink to the bottom of the flask. The assumption that the air in the flask is displaced by the Carbon dioxide gas is likely valid because Carbon dioxide gas is heavier than air and will not mix with it easily. However, it is possible that there may be some mixing or diffusion of the gases over time, especially if the flask is not perfectly sealed.

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A mesh is used to keep the products of the electrolysis apart.
Suggest one reason why the products of the electrolysis must be kept apart.
[1 mark]
Which type of particle passes through the mesh in the electrolysis of
molten sodium chloride?
Tick (✓) one box.
Atom[]
Electron[]
lon[]
Molecule[]
[1 mark]

Answers

Answer:

The products must be kept apart as the products could react spontaneously. Also, ions from the electrolyte pass through the mesh. This may include Na+ and Cl- ions if the electrolyte is maintained at a molten state.

Write the electron configurations for neutral atoms of gallium (Ga), chlorine (Cl), phosphorus (P), calcium (Ca), and sulfur (S ). Electron configuration for Ga: electron configuration for Cl: electron configuration for P: electron configuration for Ca: electron configuration for S: Arrange the atoms according to both decreasing atomic radius and increasing first ionization energy (IE). Largest radius Smallest first IE Smallest radius Largest first IE Answer Bank Answer Bank Ga Cl Са Ga S Cl P S Са

Answers

The electronic configurations for neutral atoms are:

Gallium (Ga): [tex]1s^{2} 2s^{2}2p^{6} 3s^{2}3p^{6} 4s^{2} 3d^{10}4p[/tex]

Chlorine (Cl): [tex]1s^{2} 2s^{2}2p^{6} 3s^{2}3p^{5}[/tex]

Phosphorus (P): [tex]1s^{2} 2s^{2}2p^{6} 3s^{2}3p^{3}[/tex]

Calcium (Ca): [tex]1s^{2} 2s^{2}2p^{6} 3s^{2}3p^{6} 4s^{2}[/tex]

Sulfur (S): 1s^2 2s^2 2p^6 3s^2 3p^4[tex]1s^{2} 2s^{2}2p^{6} 3s^{2}3p^{4}[/tex]

Arranging the atoms according to both decreasing atomic radius and increasing first ionization energy (IE):

Largest radius: Ca > Ga > P > S > Cl

Smallest radius: Cl < S < P < Ga < Ca

Smallest first IE: Ca < S < P < Cl < Ga

Largest first IE: Ga > Cl > P > S > Ca

Note: Atomic radius generally increases down a group and decreases across a period, while first ionization energy generally decreases down a group and increases across a period.

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Assuming the octet rule is obeyed; how many covalent bonds will a nitrogen atom fom t give a formal charge of zero?

Answers

Assuming the octet rule is obeyed and have a formal charge of zero, a nitrogen atom typically forms three covalent bonds with other atoms.

These bonds can be with hydrogen atoms or other elements, and the arrangement of shared electrons ensures a stable electron configuration for all atoms involved.

A nitrogen atom forms covalent bonds to achieve a formal charge of zero by adhering to the octet rule. Nitrogen has five valence electrons in its outer shell, requiring three additional electrons to complete its octet. By sharing three electrons with other atoms through covalent bonding, nitrogen can reach a stable electron configuration.

Covalent bonds involve the sharing of electrons between atoms to satisfy the octet rule. Nitrogen can form three covalent bonds, such as in ammonia (NH3), where it shares one electron with each of the three hydrogen atoms. In this case, each hydrogen atom contributes one electron, and nitrogen contributes three electrons, creating a stable, shared electron arrangement with a formal charge of zero for nitrogen.

Similarly, nitrogen can form covalent bonds with other elements to achieve a formal charge of zero. For example, in nitrogen gas (N2), two nitrogen atoms share three electrons each, resulting in a triple bond with a total of six shared electrons. Each nitrogen atom in this molecule achieves a complete octet and has a formal charge of zero.

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treatment of acetylene with a suitable base affords lithium acetylide, which was used as a reagent in a partial synthesis of the antitumor natural product ( )-acutiphycin. (org. lett. 2014, 16, 1168-1171) step 1 draw the structure of lithium acetylide.

Answers

The treatment of acetylene with a suitable base, such as lithium hydroxide or lithium amide, results in the formation of lithium acetylide. This compound is used as a reagent in organic synthesis in the formation of carbon-carbon bonds.


In the partial synthesis of the antitumor natural product ( ⁻) acutiphycin, lithium acetylide was utilized as a key reagent. The first step in this process involved the formation of lithium acetylide through the treatment of acetylene with a suitable base.
The structure of lithium acetylide can be drawn as follows:
Li⁺
|
C≡C⁻

Carbon-carbon double bonds have more energy than carbon-carbon single bonds, which is a given.

Since bond energy and bond strength are directly inversely related, double bonds will be stronger than single bonds and triple bonds will be the strongest of all bonds.

The bond length of a carbon-carbon bond and bond energy are inversely related. This implies that the bond will be shorter and vice versa depending on the amount of bond energy.

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Write the reactions for the brominations you performed ( cis stilbene), in each case showing the intermediate bromonium ion that formed. Write mechanism to get good rating

Answers

The overall reaction can be represented as follows:

cis-stilbene + Br2 → cis-1,2-dibromo-1,2-diphenylethane

The bromination of cis-stilbene involves the addition of bromine to the double bond of the molecule, forming a bromonium ion intermediate. The bromonium ion is a three-membered ring with a positive charge on the central bromine atom and two carbon atoms attached to it. The reaction proceeds through an electrophilic addition mechanism, in which the bromine molecule acts as an electrophile, attacking the electron-rich double bond of cis-stilbene.The mechanism for the bromination of cis-stilbene can be broken down into three steps: initiation, propagation, and termination. In the initiation step, a bromine molecule is split into two bromine radicals by exposure to light or heat. In the propagation step, one of the bromine radicals attacks the double bond of cis-stilbene, forming the bromonium ion intermediate. The other bromine radical then attacks the opposite side of the bromonium ion, completing the addition reaction and forming the dibrominated product. In the termination step, the radical species combine to form a non-radical product.The overall reaction can be represented as follows:cis-stilbene + Br2 → cis-1,2-dibromo-1,2-diphenylethaneThe intermediate bromonium ion can be represented as follows:The mechanism for the bromination of cis-stilbene involves the formation of the bromonium ion intermediate, which is a key step in the addition of halogens to alkenes. Understanding this mechanism is important for predicting and controlling the regioselectivity and stereoselectivity of these reactions.

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PART OF WRITTEN EXAMINATION:
In the galvanic series, the more active metals:
A) are more cathodic metals than noble metals
B) will corrode if connected to a less active metal
C) will not corrode if connected to a less active metal
D) are generally resistant to corrosion

Answers

The correct answer to the given question is B) will corrode if connected to a less active metal. The galvanic series is a list of metals and alloys arranged in order of their relative electrochemical activity in seawater or other aqueous solutions.

The more active (or anodic) metals, such as magnesium and zinc, are located at the top of the series, while the less active (or cathodic) metals, such as gold and platinum, are at the bottom. When two different metals are in contact in an electrolyte, such as seawater, a potential difference is created, and one of the metals becomes the anode and corrodes, while the other becomes the cathode and is protected from corrosion. The more active metal will corrode, while the less active metal will remain unaffected. This phenomenon is known as galvanic corrosion. Therefore, option B) is the correct answer, as the more active metals will corrode if connected to a less active metal due to the potential difference created between the two metals.

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4) Determine the mass, in grams, of:

a. 8. 075 mol Au

b. 4. 20 x 10^22 atoms Na

Answers

Answer:

a. 8.075 mol Au = 8.075 mol x 196.97 g/mol =

1594.9 g Au

b. 4.20 x 10^22 atoms Na= 4.20 x 10^22

atoms x 22.99 g/mol = 95.418 x 10^22 g Na

PART OF WRITTEN EXAMINATION:
Portable Reference Electrode used for measurements in seawater?
A) SCE
B) SHE
C) PGP
D) GPG
E) SSC

Answers

The portable reference electrode commonly used for measurements in seawater is the SCE (Saturated Calomel Electrode). The SCE has a stable and reproducible potential,

which makes it ideal for use in harsh environments such as seawater. It is easy to use and can provide accurate measurements of various parameters in seawater, including pH, conductivity, and redox potential. Additionally, SCEs have a long shelf life, making them a cost-effective option for fieldwork. Overall, the SCE is a reliable and convenient choice for reference electrode in seawater measurements

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3-methyl cyclohexene is reacted with hbr in ether as the solvent. classify the reaction, provide the product (0.5 point), iupac name for the product (0.5 points) and predict a mechanism for it. (2 points)

Answers

When 3-methyl cyclohexene reacts with HBr in ether as the solvent, the reaction is classified as an electrophilic addition reaction. Here's the step-by-step explanation for the product formation, IUPAC name, and mechanism:



1. Product Formation: The 3-methyl cyclohexene reacts with HBr, leading to the addition of a bromine atom to the less substituted carbon of the double bond. The resulting product is 1-bromo-3-methylcyclohexane.

2. IUPAC Name: The IUPAC name for the product is 1-bromo-3-methylcyclohexane.

3. Mechanism Prediction:
Step 1: The HBr molecule acts as an electrophile, and the alkene double bond in 3-methyl cyclohexene acts as a nucleophile. The nucleophile attacks the electrophilic hydrogen atom in HBr, forming a bond with it.
Step 2: The bromide ion (Br-) is released as a leaving group from the HBr molecule. This leads to the formation of a carbocation intermediate, with the positive charge on the less substituted carbon (secondary carbocation) of the cyclohexane ring.
Step 3: The bromide ion attacks the carbocation, forming a bond with the positively charged carbon atom. This results in the formation of the final product, 1-bromo-3-methylcyclohexane.
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Determine the oxidation state of each species. Identify the oxidation state of Ba2+. Identify the oxidation state of Sin SO, Identify the oxidation state of Sin So. Identify the oxidation state of Zn in ZnSO,

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To determine the oxidation state of each species, we need to assign a charge to each atom based on the electronegativity difference between the elements and assuming that electrons in bonds are shared equally.

The oxidation state of Ba²⁺ is +2, as it has lost two electrons to become a cation.

The oxidation state of S in SO₃²⁻ is +4, as oxygen has an oxidation state of -2 and the overall charge of the ion is -2. Therefore, sulfur must have a +4 oxidation state to balance the charges.

The oxidation state of S in SO₄²⁻ is +6, as oxygen has an oxidation state of -2 and the overall charge of the ion is -2. Therefore, sulfur must have a +6 oxidation state to balance the charges.

The oxidation state of Zn in ZnSO₄ is +2, as oxygen has an oxidation state of -2 and the overall charge of the ion is 0. Therefore, zinc must have a +2 oxidation state to balance the charges.

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Compare the oxidation number of manganese in MnO with that in Mn2O3.

The oxidation number of manganese in MnO is?and in Mn2O3 is?

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The oxidation number of manganese in MnO is +2 and in Mn₂O₃ is -4.

The oxidation number of manganese (Mn) in MnO and Mn₂O₃ can be determined by assigning oxidation numbers to the other elements in the compound, based on the known rules.

In MnO, oxygen (O) is assigned an oxidation number of -2, since it is in a binary compound with a more electronegative element (Mn). Assuming that the compound is neutral, the sum of the oxidation numbers of all the atoms in the compound must be zero. Therefore, the oxidation number of Mn in MnO can be calculated as,

Mn + (-2) = 0

Mn = +2

Therefore, the oxidation number of manganese in MnO is +2.

In Mn₂O₃, we can assign oxidation numbers as follows: oxygen is again assigned an oxidation number of -2. Let's assume the oxidation number of Mn is x. Mn₂O₃ can be split into two MnO compounds and one Mn metal,

2MnO + Mn → Mn₂O₃

Using the oxidation number of Mn in MnO found above, we get,

2(+2) + x = 0

x = -4

Therefore, the oxidation number of manganese in Mn₂O₃ is -4.

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In an acid environment
A) metals more active than
hydrogen will be corroded, and those more noble will not be corroded.
B) metals less active than
hydrogen will be corroded, and those less noble will not be corroded.

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The acid environment, the behavior of metals can be predicted based on their activity series. The activity series ranks metals in order of their tendency to undergo oxidation reactions, with the most reactive metals at the top and the least reactive metals at the bottom.



The Based on this activity series, it can be determined that in an acid environment, metals more active than hydrogen will be corroded, while those less active will not be corroded. This is because in an acidic solution, the hydrogen ions present are highly reactive and will react with metals that are more reactive than them to form metal ions and hydrogen gas. This process is known as corrosion. On the other hand, metals less active than hydrogen will not be corroded in an acid environment because they are less reactive than the hydrogen ions present. These metals will instead remain in their metallic form and will not undergo any significant reaction. It is important to note that the corrosive behavior of metals in an acid environment can be influenced by other factors such as concentration of the acid and temperature. It is also possible for some metals to have a protective oxide layer that prevents corrosion even in an acidic environment.

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