is CaS soluble in water

The first reaction in this case, the conversion of succinate to fumarate, falls under the dehydrogenation category.

The second reaction falls under the category of oxidative decarboxylation and involves the conversion of beta-ketoglutarate to succinyl-CoA.

Isocitrate's conversion to -Ketoglutarate in the third reaction falls under the category of oxidative decarboxylation.

The fourth reaction, a succinyl-CoA to succinate conversion, falls under the heading of substrate-level phosphorylation.

The fifth reaction, the transformation of L-Malate to oxaloacetate, falls under the dehydrogenation category.

The sixth reaction, the transformation of fumarate to L-malate, falls under the hydration category.

Redox, dehydration, hydration, and decarboxylation reactions are all included in the eight steps of the citric acid cycle. Three NADH molecules, one FADH2 molecule, and one GTP or ATP molecule are formed during each cycle turn and used later in the process of cellular respiration to create ATP for the cell.

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The mass of the polystyrene sample is 57.3 grams.

Styrofoam cups help insulate the reaction mixture and slow heat loss from the sides and bottom. Of course, heat is lost through the surface of the liquid mixture, but this can be reduced by using a styrofoam lid with a hole for the thermometer.

The Coffee Mug Calorimeter is essentially a polystyrene mug with a lid. A beaker is partially filled with a known amount of water and a thermometer is inserted through the lid of the beaker so that the bulb is submerged. A coffee cup calorimeter is a convenient and simple device that can be used to measure the temperature change that accompanies a reaction.

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Answer:

sulfur is bigger than oxygen because the number of protons that are present in oxygen is 8, while the total number of protons of sulfur is 16 this clearly states that the size of sulfur is lager because of the higher number of protons and more filled orbitals.

The Lewis structure of the compound is shown in the image attached to this answer.

We know that the Lewis structure shows us what a compound looks like. The two parts of the Lewis structure would include the symbol of the element as well as the electron dots that can be used to show the number of valence electrons. This is why we call the Lewis structire the Lewis dot structure of a compound.

We can see that the compound here has an amine group as well as a carboxylic group and the Lewis structure would tell us the number of electron pairs that we have on the valence shell of  each of the atoms.

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When 3.45 L of a 0.35 M H₃PO₄  to be diluted to a volume of 10.00 L, The concentration of H₃PO₄ resulted is 0.1207 M

The concentration of H₃PO₄  can be calculated as follows:

Dilution is the process of reducing the concentration of a solute in solution, usually by simply mixing the solute with more solvent by adding water to the solution.

The formula (M1V1=M2V2) represents the dilution formula in chemistry.

M1V1=M2V2

3.45 L x 0.35 M = M2 X 10.00 L

M2 =  3.45 L x 0.35 M

                10.00 L

M2 = 0.1207 M

Therefore, when 3.45 L of a 0.35 M H₃PO₄  to be diluted to a volume of 10.00 L, The concentration of H₃PO₄ resulted is 0.1207 M

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The product of the reaction is m-nitrobenzaldehyde, option B.

M-nitrobenzaldehyde, also known as meta-nitrobenzaldehyde is an organic aromatic compound that contains a nitro-group which is meta substituted to an aldehyde. It is soluble in water at 2.34 mg/ml and a temperature of 25° C. It is also soluble in ethanol, benzene and slightly in ether. M-nitrobenzaldehyde production process is prepared by nitration.

The carboxylic group is meta directing and has an ortho-para deactivating group therefore, during nitration of benzaldehyde, meta position gains an attachment from the nitro group forming m-nitrobenzaldehyde as product.

The full question is:

Predict the major product for the reaction shown.

a. o-cyanonitrobenzene & p-cyanonitrobenzene

b. m-nitrobenzaldehyde

c. o-cyanonitrobenzenesulphonic acid & p-cyanonitrobenzenesulphonic  acid

d. m-cyanonitrobenzenesulphonic acid

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Answer:

Ammonium acetate, i think

Answer:

The conjugate acid is CH3COOH

The Glycolysis produces pyruvate.

What is pyruvate?

Pyruvate is a three-carbon molecule which is the end product of glycolysis, the first step in the breakdown of glucose for energy. It is also the starting point for the Krebs cycle, the second stage of cellular respiration. Pyruvate is formed from the cleavage of the six-carbon sugar molecule, glucose, and is then further oxidized to form acetyl-CoA and enter the Krebs cycle. The enzymes responsible for pyruvate production are known as pyruvate kinases and are found in most eukaryotic cells. Pyruvate is an important molecule in the production of energy within the cell, as it acts as both a source of energy and a precursor to other metabolic pathways. Additionally, pyruvate is involved in the synthesis of fatty acids, amino acids, and other biomolecules. Pyruvate is also used in the fermentation process to produce lactic acid and ethanol.

The pyruvate dehydrogenase (PDH) enzyme is part of the multienzyme PDC, which catalyzes the physiologically irreversible decarboxylation of pyruvate to acetyl-CoA and is often referred to as a 'gatekeeper' in the oxidation of carbohydrate.

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Mass of ammonium chloride (NH4Cl) = 11.4 grams

Volume of 0.3 M aqueous solution of potassium carbonate (K2CO3) = 250 mL = 0.250L

Step 2: The balanced equation

2NH4Cl + K2CO3 → 2KCl + (NH4)2CO3

Step 3: Calculate moles of (NH4)Cl

moles (NH4)Cl = 11.4 grams /53.49 g/mol

Moles (NH4)Cl = 0.213 moles

Step 4: Calculate moles of K2CO3

Moles K2CO3 = Molarity * Volume

Moles K2CO3 = 0.3M * 0.250 L = 0.075 moles

Step 5: Calculate moles (NH4)Cl at the equilibrium

For 2 moles (NH4)Cl consumed, we need 1 mole of K2CO3 to produce 2 KCl and 1 mole of (NH4)2CO3

(NH4)2CO3l will dissolve in 2NH4+ + CO32-

Moles (NH4)2Cl = 0.213 moles - 2*0.075 = 0.063 moles

Moles NH4+ = moles (NH4)Cl = 0.063 moles

Step 6: Calculate Molarity of NH4+

Molarity = Moles / volume

Molarity of NH4+ = 0.063 moles / 0.250 L

Molarity of NH4+ = 0.252 M

Therefore, the molarity of the final ammonium cation is 0.252M

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Neither zinc(Zn) nor cobalt(Co) can be used as an inactive material. Both Zn and Co are active elements and they actively take part in the reactions.

Electrodes are defined as conductors that are used to make electrical contact with a non-metallic part of the circuit. Electrodes are of two types - reactive electrodes and inert electrodes

Reactive electrodes- These are the electrodes which take part in the reaction and can dissolve in the electrolyte. Examples are copper electrode, zinc electrode.

Inert electrodes - These electrodes do not take part in the reaction. Examples are carbon electrode etc.

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A science teacher adds water to a strong acid for use in the lab with students. this makes the concentration weaker, because the amount of solute per volume of solvent decreases.

What is meant by concentration of the solution?

There are two components in an aqueous solution: the solute and the solvent. You must be familiar with these two fundamental terminology for solution concentration. The amount of solute in the solution must always be recorded. The quantity of a solute in a solvent is what we refer to in chemistry as the concentration of a solution. We refer to a solution as being concentrated when there is more solute present. Conversely, we refer to a solution as being diluted when it contains more solvent.

There are various methods of expressing the concentration of a solution. You will usually see Chemists working with the number of moles. Pharmacists will use percentage concentrations instead of the number of moles.

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Answer:

A fire could cause an increase in evaporation of water from surface water near the fire.

Explanation:

Answer:

Explanation:

Wildfires can compromise water quality both during active burning and for months and years after the fire has been extinguished. Burned watersheds are prone to increased flooding and erosion, which can negatively affect water-supply reservoirs, water quality, and drinking-water treatment processes.

Wildfires can have immediate and long term effects on rivers, lakes, and streams. After burning vegetation, the ground's soil becomes hydrophobic and is unable to absorb any water. This creates what is known as stormwater runoff. Stormwater runoff is rainflow that travels over the surface of the ground.

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The wavelength of radiation required to ionize b4 is therefore equal to 4.51 kj/mol / 10.8 eV, or 0.42 nm.

What is radiation?
Based on the energy of a radiated particles, radiation is frequently divided into ionising and non-ionizing categories. More than 10 eV is carried by ionising radiation, which is sufficient to ionise atoms as well as molecules and rupture chemical bonds. Due to the significant differences in how harmful these substances are to living things, this distinction is crucial. Radioactive substances that emit radiation in the form of helium nuclei, electrons as well as positrons, or photons are frequently sources of ionising radiation.

The ground state ionization energy of b4 is the energy required to remove an electron from the atom in its ground state. This energy is usually expressed in kilojoules per mole (kj/mol) and is equal to the amount of energy required to ionize one mole of b4 atoms.

The wavelength (λ) of radiation required to ionize b4 is the energy of the photon of radiation divided by the ground state ionization energy of b4. This wavelength is usually expressed in nanometers (nm).

The ground state ionization energy of b4 is 10.8 eV, which is equal to 4.51 kj/mol. The wavelength of radiation required to ionize b4 is therefore equal to 4.51 kj/mol / 10.8 eV, or 0.42 nm.

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Answer:

B. Past changes in the climate have been faster than the changes we're seeing today

Explanation:

The Earth is warming abnormally quickly . Over the past century it has warmed roughly 10 times faster than the average increase in temperature after each ice age .

so the answer is B.Past changes in the climate have been faster than the changes we're seeing today.

1.55 M equals moles. 5 moles of NaCl = 0.775 moles Explanation: Molarity = number of moles of solute per litre of solution To begin, we must convert 500 mL to Liters.

what is saline used for ?

Saline (or saline solution) is a solution of sodium chloride (salt) and water. It has a variety of medical applications, including wound cleansing, contact lens removal and storage, and dry eye relief. It is used to treat dehydration caused by gastroenteritis and diabetic ketoacidosis by injecting it into a vein. Excessive quantities can cause fluid overload, edoema, acidosis, and high blood sodium. Excessive usage may result in osmotic demyelination syndrome in those who have long had low blood salt levels.

1.55 M equals moles. 5 moles of NaCl = 0.775 moles Explanation: Molarity = number of moles of solute per litre of solution To begin, we must convert 500 mL to Liters.

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the score by the sociology professor was -1.54

what is sociology ?

Sociology is a social science that studies society, human social behaviour, patterns of social interactions, social interaction, and cultural elements of daily life. It employs a variety of empirical inquiry and critical analysis techniques. 3-5 to build a foundation of knowledge on social order and social change 32–40 While some sociologists perform research that may be immediately applied to social policy and welfare, others are primarily concerned with improving theoretical knowledge of social processes and the phenomenological approach. The topics covered might range from micro-level studies of society (i.e., individual interaction and agency) to macro-level assessments of society (i.e. of social systems and social structure).

the mean (m) is = 35.3,

standard deviation = 8.6

P x <22

z = (x - m) / sd

We have all these values, replacing we have:

z = (22 - 35.3) / (8.6)

z = -1.54

22 score to z-score is -1.54

therefore the score was 22 score to z-score is -1.54

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Carbons involved in a double bond are sp2 hybridized because each carbon has two sigma bonds and one pi bond. This means that the carbon is using three of its four valence orbitals to form the bonds, leaving one unhybridized p-orbital.

What is bond?
A bond is a type of security used in finance where the issuer (debtor) owes this same holder (creditor) a debt and is required, depending on the terms, to repay the bond's principal (i.e., the amount borrowed) at the bond's maturity date in addition to interest (referred to as the coupon) over a predetermined period of time. The interest is typically due at predetermined intervals, including semiannually, annually, and less frequently at other times. A bond is therefore a type of loan as well as IOU. With the help of bonds, the borrower can finance long-term investments as well as, inside the case of government bonds, current expenses.

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Equations 1 & 2, Equations 2&3, and Equations 1&3 illustrate a favorable energetic coupling in a cell.

What is the non-spontaneous reaction?
A nonspontaneous reaction is one that under the specified conditions, does not favour the formation of products. A reaction needs to be endothermic, accompanied by the a drop in entropy, or both to qualify as nonspontaneous. The majority of the gases that make up our atmosphere are a combination of nitrogen and oxygen.

If G is positive, the reaction is not spontaneous and will need external energy. The reaction seems to be spontaneous and will happen on its own if G is negative.

Coupling of reactions-
Equations 1 and 2-
∆G1=-7kcal/mol, ∆G2=-14.8kcal/mol
∆G total= -21.8kcal/mol( favourable reaction)
Equation 2&3-
∆G2=-14.8kcal/mol, ∆G3=+3.3kcal/mol
∆G total=-11.5kcal/mol(favourable)
Equations 3 and 4-
∆G3=+3.3kcal/mol, ∆G4= +7kcal/mol
∆G total=+10.3kcal/mol(unfavorable)
Equations 1 and 4-
∆G1=-7kcal/mol, ∆G4=+7kcal/mol
∆G total= 0(reaction will be in equilibrium)
Equations 1 and 3-
∆G total=(-7+3.3)kcal/mol
=-4.3 kcal/mol(favorable)

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The cations and anions are ions. They possess opposite electrical charge, so they get attracted to each other. Here the cation of the compound is Cr²⁺ whereas the anion is S²⁻.

A cation can be defined as the atom or molecule which is positively charged and an anion can be defined as the atom or molecule which is negatively charged. All the cations are found to be metal and the anions are non-metal.

The cation repels other cation whereas the anion repels another anion. The number of protons is more than the number of electrons in a cation whereas the number of electrons is more than the number of protons in an anion.

Here in the given compound CrS₂, the positively charged ion is Cr²⁺ which is the cation and the negatively charged ion is S²⁻ which is the anion.

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The Lewis structure of the arsenite is shown in the image attached.

We know that the Lewis structure of a compound can help us to be able to see the way that there can be a good arrangement of the atoms that we have in the compound.

There are two parts of the Lewis structure and they are;

-The symbol of the element

-The electrons in the elements shown as dots

For the arsenite, we can see tat we have one atom of arsenic and then we have two atoms of oxygen in the Lewis structure of the compound. The compound is linear in molecular geometry  but the electron domain geometry is trigonal planar.

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The given statement is false, as a mole of horses contain 4 mole of horse legs.

The ratio of moles of molecules (or formula units) to moles of atoms can be used as a conversion factor. To create the conversion factor from this equation, write the magnitude on one side of the equal sign in the numerator of the fraction and the other magnitude on the denominator. Note that a second conversion factor can be created by interchanging the spelling of each quantity for the fraction bar. A conversion factor is an expression of the relationship between units used to change the units of a measured quantity without changing the value. The conversion factor (or unit factor) is always equal to 1, the numerator and denominator have the same value, and are expressed in different units.

Start with the number of horses in moles.

As every horse has has four legs. Use it as a conversion factor to convert the moles on the horse to the moles on the legs.

1 mol horse = 1 mol legs / 4 mol legs

1 mol horse × (4 mol legs / 1 mol legs) = 4 mol legs

4 mol legs ≠ 1 mol legs, so this is false.

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A large volcanic eruption occurred spewing ash and other gases into the atmosphere and most likely it increases atmospheric carbon dioxide levels due to lower global photosynthesis rates. Hence, the option B is correct.

Volcanic eruptions impacts climate change through emitting volcanic gases into the atmosphere. The volcanic gases mainly contains sulfur dioxide, which causes global cooling, and volcanic carbon dioxide, which has the potential to promote global warming. Increase rate in the global warming reduces the rate of photosynthesis, which in return become the reason for the eruption of Carbon cycle.

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When arranged in order of decreasing standard molar entropy the above will be: N₂O₄ > NO₂ > NO. (Option A)

The entropy content of one mole of pure material at a standard condition of pressure and any temperature of interest is referred to as the standard molar entropy in chemistry. These are frequently used as the standard temperature and pressure.

The standard entropy of the reaction aids in determining whether or not the reaction will occur spontaneously. A spontaneous reaction always increases the overall entropy of the system and its surroundings, according to the second rule of thermodynamics: Molar entropy does not apply to all gases.

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Answer: Predict the electron-pair geometry and molecular structure for each of the following: carbon dioxide, CO2 CO 2, a molecule produced by the combustion of fossil fuels boron trichloride, BCl3 BCl 3, an important industrial chemical

convection can occur in only in liquids and gases.

Convection is a phenomenon that exclusively affects liquids and gases. Convective heat transfer refers to the movement of heat from a fluid (gas or liquid) to a solid.

Convection is the mass motion of a fluid, like air or water, which transfers heat. Since the particles are closely packed to help with the process, convection does not happen in solids. Actual movement between particles is necessary for convection within a material.

Wherever there is movement of the medium's particles, convection occurs. This is only feasible in liquids and gases; it is not possible in solids.

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The energy is evolved during the reaction is  237.6 kJ

the reaction is given as:

B₂H₆   +  Cl₂    ---->  2BCl₃   +  6HCl

mass of B₂H₆  = 32.5 g

mass of  Cl₂ = 72.5 g

molar mass of B₂H₆  = 27.67 g/mol

number of moles of B₂H₆  = mass / molar mass

                                           = 32.5 / 27.67

                                           = 1.17 mol

number of moles of Cl₂ = mass /molar mass

                                       = 72.5 / 71

                                       = 1.02 mol

6 mol of Cl₂ = 1 mol of  B₂H₆

1.02 mol of  Cl₂  = 1.02 / 6 = 0.17 mol

1 mole of B₂H₆  = 1396 kJ/mol

0.17 mol B₂H₆  = 0.17 × 1396

                        = 237.6 kJ

The energy of the reaction = 237.6 kJ.

Thus, According to the following reaction, energy is evolved during the reaction of 32. 5 g  B₂H₆  and 72. 5 g   Cl₂   the molar mass of  B₂H₆ is 27. 67 g/mol is 237.6 kJ.

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Conjugate Acid-Base pair will be  (HCOOH ,HCOO⁻ ) and (NH₄⁺ ,NH₃)

NH₃+ HCOOH ↔ NH₄⁺ + HCOO⁻

A conjugate acid is , within the Bronsted–Lowry acid–base theory, is the species formed by the reception of a proton (H⁺) in the  chemical reaction. Hence, the conjugate base is a species formed by the removal of the proton from an acid.

In summary, this can be represented by following chemical reaction:

Acid + Base ⇌ Conjugate Base + Conjugate Acid

Conjugate base is the substance formed when an acid loses the hydrogen ion . Considered a base because it can gain the hydrogen ion to reform the acid .

Ex Cl⁻ is the conjugate base of HCl

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The  a metal tank containing hydrogen gas has a pressure gauge that reads 575 psi, 120  pressure inside of the tank.

What is pressure gauge?

A device used to measure a fluid's (liquid or gas') state by calculating the force the fluid would apply to a unit area if it were at rest.

What is pressure?

The force of all gas particle/wall collisions divided by the surface area of the wall is the definition of pressure (P): One of the fundamental quantifiable variables.

Therefore, a metal tank containing hydrogen gas has a pressure gauge that reads 575 psi, 120  pressure inside of the tank.

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If in a gas the volume is held constant and the temperature increases, pressure exerted by the gas also increases.

Ideal gas law

The gas law which relates the macroscopic properties of ideal gases is known as ideal gas law. A gas is known as an ideal gas when its particles (a) do not attract or repel one another and (b) take up no space (have no volume). The ideal gas law equation is given as the following,

(PV = nRT)

Where,

P is pressure

V is volume

R is the universal gas constant

T is the temperature and

n is the number of moles

As we can see from the equation that T is directly proportional to P so when V is kept constant and T increases P also increases.

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