Warm air rises at the equator and cold air sinks at the poles creating
Responses
A hurricanes.hurricanes.
B convection currents.convection currents.
C the Coriolis effect.the Coriolis effect.
D tornadoes.

Enthalpy change of Pentane (C5H12)  that burns is -3,270.5  kJ

Enthalpy change is defined as the difference in enthalpy of total products and reactants, each multiplied by the respective moles. It is expressed as ΔH°rxn

The formula for calculating the enthalpy change of a reaction is:

ΔH°rxn =∑[n x ΔH°f(product) - ∑[n x ΔH°f(reactant)]

The equilibrium reactions are:

C₅H₁₂(l) + 8O₂(g) ⇒ 5CO₂(g) +6H₂O(g)

ΔH°f(CO₂)(g) = -393.5 kJ/mol

ΔH°f(H₂O)(g) = - 241.8 kJ/mol

ΔH°f(C₅H₁₂)(l) = -146.8 kJ/mol

ΔH°f(O₂)(g) = 0 kJ/mol

The equation for the enthalpy change for the above reaction is:

ΔH°rxn =∑[n x ΔH°f(product) - ∑[n x ΔH°f(reactant)]

ΔH°rxn =∑[(n(CO₂) x ΔH°f(CO₂)) + (n(H₂O) x ΔH°f(H₂O)) ]- ∑[(n x ΔH°f(C₅H₁₂)) + (n x ΔH°f(O₂))]

ΔH°rxn =[( 5 x -393.5) + (6 x - 241.8 ) ]- [(1 x -147.8) + (8 x O₂)]

ΔH°rxn = -3,418.3 -(-147.8)

ΔH°rxn = -3,270.5  kJ

Therefore, the enthalpy of burning 1 mole of pentane is -3,270.5  kJ

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The  option (b) is correct, Water induces dipole moment or polarity in the non polar molecule and thus polarize it momentarily.

What is polar?

a structure where the density of electrons is unbalanced. Nonpolar structures are those that have an electron density that is roughly uniform. Molecules' many physical, chemical, and biological properties are affected by polarity, which can take many different forms

What is molecules?

the tiniest component of an object that possesses all of its physical and chemical characteristics. The number of atoms that make up a molecule might vary.

Water induces dipole moment or polarity in the non polar molecule and thus polarize it momentarily. Thus it is attracted towards polar water molecule.

Therefore, option (b) is correct, Water induces dipole moment or polarity in the non polar molecule and thus polarize it momentarily.

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The electron flow arrow always starts from the nucleophilic center to the electrophilic Centre.

What is nucleophilic ?

The term "nucleophile" refers to an atom or molecule that searches for a positive centre during a chemical reaction, such as the nucleus of an atom, since the nucleophile has an accessible electron pair for bonding.

What is electrophilic ?

An atom or molecule that searches for an atom or molecule that has a pair of free electrons during a chemical process. Lewis acids, which absorb electron pairs, are electrophilic chemicals; many of them are also Brnsted acids (compounds that donate protons).

The electron flow arrow always starts from the nucleophilic center to the electrophilic Centre. The arrow starts from the electrons.

Mechanism with arrows:-

Therefore, The electron flow arrow always starts from the nucleophilic center to the electrophilic Centre.

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The Driving force for the given reaction is the formation of H2S (g)

What is a double displacement reactions?

Double replacement reactions—also known as double displacement, exchange, or metathesis reactions—take place when pieces of two ionic compounds are swapped, creating two new compounds.

What is a spectator ions?

Spectator ions are ions that are present on both sides of chemical reactions but do not actively participate in the reaction. The spectator ions on both sides of the equation cancel in the net chemical reaction.

1) Driving forces in double Displacement reactions

Type of reaction -         Driving forces

Acid Base -                    Formation of water

Precipitation -               Formation of a solid

Multiple -                       Formation of gas

2) Spectator ions: K+(aq), Cl-(aq)

3) Driving force for the given reaction is the formation of H2S (g)

Therefore,  Driving force for the given reaction is the formation of H2S (g)

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an uniform combination known as a solution because seawater has the same properties across the entire mixture.

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Acetyl-CoA indicates conversion of fat to carbs necessary. Acetyl-CoA carboxylase accumulation indicates lack of citrate. NADH is produced for energy when pyruvate carboxylase is activated by acetyl-CoA.

Acetyl-CoA selectively activates pyruvate carboxylase. When acetyl-CoA concentrations are high, organisms use pyruvate carboxylase to divert pyruvate from the TCA cycle because acetyl-CoA is a crucial metabolite in the TCA cycle that generates a lot of energy.

The production of more oxaloacetate is triggered by an excess of mitochondrial acetyl-CoA. When lipolysis is induced, for instance, intramitochondrial acetyl-CoA levels rise, allosterically activating pyruvate carboxylase to produce more oxaloacetate for gluconeogenesis.

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The coriolis effect coupled with the frictional coupling of wind and water leads to the moving of surface water at 90° towards the right ward direction of the wind in the Northern hemisphere and to the left ward direction of the wind in the southern hemisphere.

Ekman transport helps surface water move away from the costal area.

Equatorial Upwelling occurs when surface water move farther away from the equator and becomes replaced by the Upwelling water.

The cause of the upwelling is due to the deviation of the sea currents by the rotation of the earth. In this way, the arrows that Josefina drew represent the movement of the water.

The second cause is due to the effect that the wind has on the sea.

Therefore must draw an arrow representing the wind to correctly represent the outcrop of the surface water.

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HBr + KOH = KBr + H2O is the net ionic equation for the reaction between potassium hydroxide and hydrobromic acid.

In a chemical equation called an ionic equation, the electrolytes in aqueous solution are expressed as dissociated ions.

As a result of the reaction between hydrobromic acid and potassium hydroxide, potassium bromide and water are produced.

HBr ⇒ H⁺ + Br⁻

KOH ⇒ K⁺ + OH⁻

Then equation becomes,

HBr + KOH ⇒   H⁺ + Br⁻ + K⁺ + OH⁻

In this case, the water molecule is created via the reaction of the H+ ion and OH. While the KBr molecule is created when the K+ ion and Br ion react.

Hence, the net balanced ionic equation when hydrobromic acid reacts with potassium hydroxide becomes-

HBr + KOH = KBr + H₂O.

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The postulate of the kinetic molecular theory that breaks down under conditions of low temperatures there is - "no attraction or repulsive forces between the gas particle."

The kinetic molecular theory's "there is no attraction or repulsive forces between the gas particle" premise is one of the postulates that fails at low temperatures. At low temperatures, this hypothesis does not hold up well because gas particles move more slowly at low temperatures than they do at high temperatures.

Due of the particles' slow mobility, they might be drawn to nearby particles by their slow motion. At low temperatures, these particles will be more likely to interact with the adjacent particles. Therefore, at low temperatures, there is an interaction force between particles.

Hence, "no attraction or repulsive forces between the gas particle" is the postulate which fails under low temperature.

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1.67 atm pressure would be exerted by the helium if the container were heated to 220 °c

P1V1T2=P2V2T1

P2=P1V1T2/V2T1

**   1 atm. 10.0cm3.(220+273k)/ 10.00cm3.(22+273k)

P2= 1.67 atm

Per unit area, pressure is a force that is delivered perpendicularly to an object's surface. P = F/A in mathematics, where P represents pressure, F is force, and A is area. Having simply magnitude and no directed vector properties, pressure is a scalar quantity. The most well-known application of helium is as a secure, inflammable gas used to inflate balloons for celebrations and parades. Helium is a crucial element in a variety of industries, including national security, high-tech manufacturing, medical technology, and scientific research.

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According to the web:

1. "In a collision, there is a force on both objects that causes an acceleration of both objects; the forces are equal in magnitude and opposite in direction. For collisions between equal-mass objects, each object experiences the same acceleration."

2. "If object A is in motion, collides with object B at rest, then the system will have some momentum due to motion of object A. Now after collision let us imagine the object becomes at rest, and object B comes to motion. This means the object B has some momentum making the system to have momentum."

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The longest and shortest wavelength when a hydrogen atom in the ground state is excited by radiations of wavelength  975°A  are  1026°A  and  6569°A  respectively.

What is Bohr's atomic model?

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The volume of argon will be 10.57 L.

Apply the ideal gas law, PV = nRT, where n is the number of moles and R is the gas constant.

We must divide the given mass of argon by its molar mass because we have mass and need moles. Argon has a molar mass of 40 g/mol.

So the number of moles of Argon in 15.2g is = [tex]\frac{15.2}{40} = 0.38[/tex]mol

Given:

P = 1.04 atm

n = 0.38 mol

R = [tex]0.082057 Latm K^{-1} mol^{-1}[/tex]

T = 353 K

Unknown:

V

Solution:

V = [tex]\frac{nRT}{P}[/tex]

V = [tex]\frac{0.38*0.082*353}{1.04} = 10.57[/tex] L

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Answer: B: NaOH

Explanation:

Gases C, E and F exhibit behavior significantly different from that expected for an ideal gas. gases exhibit behavior significantly different from that expected for ideal gas

A theoretical gas called an ideal gas is one that has lots of point particles moving around randomly and not being affected by other particles. The ideal gas concept is advantageous because it complies with the ideal gas law, a condensed equation of state, and is amenable to statistical mechanics analysis. A theoretical gas called an ideal gas is one that has lots of randomly moving particles but doesn't have any interparticle interactions. The opposite is true for a real gas; it takes up space and its molecules interact. As a result, PV is always equal to nRT.

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The structure of the acetyl-CoA is -[SEE aatachemt]

The structure of the malonyl-CoA is -[SEE aatachemt]

The structure of the palmitic acid is -[SEE aatachemt]

So from comparing all the three structures, it is evident that the terminal carbon with attached O= will be the suitable carbon to radiolabel the malonyl-CoA as this carbon will remain in the resultant palmitate molecule to trace down.

A crucial intermediary metabolite in the synthesis of fatty acids is malonyl-CoA. Malonyl-coenzyme A (CoA) is the substrate that serves as the main carbon source for the synthesis of palmitate (C16), which is catalyzed by fatty acid synthase, in de novo fatty acid synthesis.

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Answer: Fluorine

Explanation:

Fluorine is least likely to lose an electron to form an ion as it needs only 1 electron to complete its shell compared to Oxygen which needs 2.

Answer:

flourine

Explanation:

Flourine will be the least likely to lose an electron because its ionization energy is higher than oxygen's. Ionization energy is an atoms ability to lose electrons, and it increases up the periods, and across the groups to the right.

If a wave has a frequency of 7.20 x 10^14 Hz and travels at the speed of light (speed of light = 3.0 x 10^8 m/s), the wavelength is 0.42 × 10⁻⁶ m.

The term wavelength of light is defined as the distance between the two successive crests or troughs of the light wave. Wavelength is denoted by the Greek letter lambda (λ).

Given:

frequency  = 7.20 x 10^14 Hz

speed of light = 3.0 x 10^8 m/s

Wavelength = ?

Wavelength = speed of light/ frequency

λ = ν / f

= 3.0 x 10^8 / 7.20 x 10^14

= 0.42 × 10⁻⁶ m

Thus, if a wave has a frequency of 7.20 x 10^14 Hz and travels at the speed of light (speed of light = 3.0 x 10^8 m/s), the wavelength is 0.42 × 10⁻⁶ m.

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Different types of atoms (elements) give off or absorb different spectral lines, Because the spacing of the energy levels is different in different atoms.

In physics, an energy levels, which is also known as an energy state, is any discrete number chosen from a range of total energies for a system of subatomic particles, such as an atom or a nucleus, that are held together by a force within a finite region. The rows of the Periodic Table of the Elements' columns match up with the atoms' energy levels when you look at it. The final electrons in the hydrogen and helium atoms in the top row are filling their initial energy level. The second energy level is being filled by the eight elements in the second row.

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According to Raoults law the total pressure of the mixture is  1.73a.

What is the contents of Raoult's law?

Describe Raoult's Law. According to Raoult's law, a solvent's partial evaporation rate in a solution (or mixture) is equal to or the same as the pure solvent's evaporation times the mole fraction present in the solution.

What is a case of Raoult's Law?

Let's say we have 100 mL each of water and ethylene glycol in two separate containers. We want to figure out the new vapor pressure of the mixture created when the two components are combined, given that the vapor pressure of pure water is 500 mmHg. Raoult's law is being directly applied in this case.

Briefing:

We can solve this problem using Raoults law. The formula for Raoults law is:

P_a = X_a * P

where,

P_a = the partial pressure of substance A

X_a = the mole fraction of substance A

P = total pressure

Therefore calculating for P:

P = P_a / X_a

P = 0.520/0.300

P = 1.73a

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Answer:

- Pb(NO3)2+2NaI→PbI2+2NaNO3.

- AgNO3+HCl=AgCl+HNO3.

- 2Na+2H2O=2NaOH+H2.

- KNO3+NaCl=KCl+NaNO3.

Accumulation of acetyl-coA carboxylase indicates a lack of oxaloacetate, which in turn promotes pyuruvate carboxylase activity.

A number of metabolic processes in the metabolism of proteins, carbohydrates, and lipids involve the molecule acetyl-CoA. Its primary job is to transport the acetyl group to the citric acid cycle where it will be oxidized to produce energy. The group of chemical molecules known as o-glucuronides includes acetyl-CoA, commonly known as acetyl coenzyme A or accoa. These are glucuronides in which an O-glycosidic bond connects the aglycone to the carbohydrate molecule. Acetyl-CoA is regarded as a fatty ester lipid molecule as a result.

The oxidative decarboxylation of pyruvate from glycolysis, which takes place in the mitochondrial matrix, the oxidation of long-chain fatty acids, or the oxidative breakdown of certain amino acids are the three main sources of acetyl-CoA. The TCA cycle is the next step, where acetyl-CoA is oxidized to provide energy.

The metabolism includes protein, carbohydrate, and lipids involves the molecule acetyl-CoA (acetyl coenzyme A) in a number of metabolic activities. Its main function is to move an acetyl group to a Krebs cycle, where it is oxidized to release energy.

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The percent yield of the reaction is 77.1% while forming lead oxide.

The atomic mass of a chemical element, expressed in atomic mass units. This roughly corresponds to the number of protons and neutrons in the atom (mass number), or the average number taking into account the relative abundance of different isotopes.

To calculate the percent yield, we need to determine the theoretical yield of the reaction. The theoretical yield is the amount of product that would be produced if all of the reactants were consumed in the reaction. We can do this by using the stoichiometric coefficients of the reactants and products. In this case, 2 moles of lead react with 1 mole of oxygen to produce 2 moles of lead(II) oxide.

Since we have 451.4 g of lead, that's equivalent to 0.799 moles of lead. From the stoichiometric equation,

We can determine that this would produce 0.799 moles of lead(II) oxide, which is equal to 349.3 g.

The percent yield is calculated by dividing the actual yield (349.3 g) by the theoretical yield (349.3 g) and multiplying by 100.

Step 1: Generate moles from 12g of phosphorus

30.97 grams of P divided by 12 grams of P gives you 0.39 moles of P.

Step 2: Using the formula: 0.39 moles of P * (3 moles of Cl2/2 moles of P) *(70.90 grams of Cl2/1 mol of Cl2) = 41.48 grams of Cl2

Since chlorine gas' supply depletes more quickly, it can be assumed that chlorine gas is the limiting reactant in this situation. Therefore, the theoretical yield of PCl3 produced should be calculated using chlorine gas.

Step 3: Calculate the moles of 35.5 grams of Cl2

0.501 moles of Cl2 are equal to 35.5 grams of Cl2*(1 mol of Cl2/70.90 grams of Cl2).

Step 4: Predict the amount of PCl3 created using mole ratios.

Therefore, the percent yield of the reaction is 77.1%.

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H₃PO₃ could be the unknown substance.

NaOH and NH₃are all basic; so, they must not be the unknown solute since the solution is acidic.

CH₃COCH₃ is a nonelectrolyte, which means it does not dissociate into ions when it dissolves in water. Acetone must not be the unknown since the solution is weakly conducted.

The two remaining candidates, HNO₃ and H₃PO₃ are both acids. The unknown solution does not conduct electricity as well as a solution of NaCl of the same concentration, which means that the unknown acid must not dissociate to the same extent as NaCl. Both NaCl and HNO₃ (a strong acid) dissociate 100%. Thus, the unknown solute must be H₃PO₃, which is known to be a weak acid (doesn't dissociate 100%).

What is the H3PO3 name?

Phosphorous acid (or phosphonic acid) is the compound described by the formula H3PO3. This acid is diprotic (readily ionizes two protons), not tricrotic as might be suggested by this formula.

What are the two colors of litmus paper?

Litmus paper is a strip of paper extracted from lichens, which is dipped into a solution to determine if it is an acid or base. Litmus papers are available in two colors, red and blue. Acidic solutions will change the color of the blue litmus to red strips.

Thus, the unknown substance is H3PO3.

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0.823 grams oxygen could be produced from 2.45 g of potassium dioxide and 4.62 grams of carbon dioxide.

Definition of Chemical reaction

Chemical reactions happen absolutely everywhere in our daily life. While we sometimes associate chemical reactions with only the sterile environment of test tubes and laboratories, nothing is farther from the truth. In fact, a wide range of transformations are creating a dizzying and almost incomprehensible series of new matter and energy changes in our world every second of every day.

Moles KO₂ = 2.41g/(71.1g/mole) = 0.034 moles

Moles CO₂ = 4.62g/(44g/mole) = 0.105 moles

4KO₂ + 2CO₂ → 2K₂CO₃ + 3O₂

The reaction requires twice as many moles of KO₂ than moles of CO₂.  That means 0.105 mole of CO₂ would consume 0.034 moles of KO₂.  But there is only have 0.034 moles of KO₂, so the limiting reagent is KO₂.  

There are 3 moles of O₂ produced for every 2 moles of CO₂ consumed.  In this case we'll assume all of the KO₂ reacts, so that should result in (3/4) × (0.034moles) = 0.025 moles of O₂ .

To get the mass, 0.025 mole × (32g/mole) = 0.823 grams O₂

Hence, 0.823 grams O₂ could be produced from 2.45 g of KO₂ and 4.62 grams o.f CO₂.

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Given since chloroform has a standard energy of vaporization of 31. 4 kJ/mol and a standard entropy of 93. 7 j/mol/K, its normal boiling point is 335K.

Formaldehyde is a solvent, or a chemical that aids in the dissolution of other substances. It is also employed in the manufacture of pesticides and films, as well as in the building, paper, & board businesses. For lacquers, floor polish, resins, glue, alkaloids, fats, oils, and rubber, it serves as a solvent.

Excitation and nausea are the first symptoms, followed by vertigo and sleepiness. Chloroform overdose that is more severe might result in cardiac issues, fits, coma, and in some circumstances, death.

Briefing :

Given, Enthalpy of vaporization = 31.4 kJ/mol.

                      Standard entropy = 93. 7 j/mol·k

Using Gibbs free energy equation

Δ G = Δ H - T (ΔS)

at equilibrium (when the liquid is boiling), Δ G = 0

so,         0 = ΔH - T (Δ S)

     T (Δ S) = Δ H

           ΔS = ΔH / T

        93.8 = (31400 J/mol.) / T

            T  = 334.7

                =335K
Therefore , boiling point of chloroform is 335K .

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LiCl is positive.the mobilities of these ions in water at 25 ºc. NaCl is sodium chloride - common salt. It is a solid but when dissolved in water then it's an aqueous solution.

An aqueous solution is a solution in which the solvent is h2o. It is mostly shown in chemical equations by appending (aqueous) to the relevant chemical formula. For ex:, a solution of table salt, or sodium chloride (NaCl), in water would be represented as Na +(aq) + Cl −(aq).

Water molecules pull the sodium and chloride ions apart, separate the ionic bond that held them together. After pulling the salt compounds apart, the Na and Cl atoms are surrounded by water molecules, as this diagram shows. Once this happens, the salt is dissolved, result in a homogeneous solution.

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The final concentration of the solution after adding water is HCl is 1.25M.

The solution of 25ml of 22M HCl is diluted to 440ml.

So, as we know,

Moles = molarity x volume

So, he moles of HCl are,

Moles = 22 x 25

Moles of HCl are 550 mole.

Even after diluting, the mole will not change, so,

Final concentration after adding water,

Concentration = 550/440

Concentration = 1.25M.

So, the final concentration of the HCl solution is 1.25M.

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If we start with 5.5 grammes of sodium fluoride, 4.1 grammes of magnesium fluoride will be created. Mg + NaF give rise to MgF2 + Na in a chemical process. This reaction uses sodium, or Na.

With the chemical formula MgF2, magnesium fluoride is an inorganic substance. The substance, which occurs as the rare mineral sellaite, is a white crystalline salt that is transparent over a broad range of wavelengths and is utilised commercially in the optics for space observatories. One set of chemical substances can change into another through a process known as a chemical reaction. Traditionally, chemical processes only affect the locations of electrons when establishing and rupturing chemical bonds between atoms.

5.5 g NaF  (1 mol NaF/42.0 g NaF) (1 mol MgF2/2 mol NaF) (62.3 g MgF2/1 mol MgF2) = 4.1 g MgF2

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On increasing the oxidizing power of the environment, the corrosion rate slows, the material is known as Noble material.

Corrosion is a natural process that converts a  metal into a more chemically stable oxide. It causes deterioration of materials by chemical or electrochemical reaction happening in their environment.

A noble metal is regarded as a metallic chemical element that is generally resistant to corrosion and is usually found in raw form.

The corrosion rate increases when the oxidation increases. But, noble materials have good rate of oxidation resistance. So, when oxidation increases, the environment causes slow corrosion.

Therefore, answer is noble material

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