In the gas phase, orbital mixing or sigma pi crossover occurs at high temperatures. Between carbon and oxygen molecules, there are differences in the molecular orbital arrangement.
What do you think of orbital theory?
Every atom has a propensity to cluster together to form molecular orbitals, claims the molecular orbital theory. Because of this arrangement, electrons are commonly connected to various nuclei and can be found in a wide range of atomic orbitals.
How is the theory of molecular orbitals created?
The atomic orbitals of the molecules' atoms are combined to form the molecules' molecular orbitals. Take the H2 molecule as an illustration. The mathematical functions for the two 1s atomic orbitals that combine to produce one of the molecule's molecular orbitals are added together.
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which postulate of the kinetic molecular theory breaks down under conditions of low temperatures? explain.
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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A student has a sample of ocean water that they take to science class. What steps could be taken to determine to classify the ocean water as a suspension, solution, element, or compound?.
an uniform combination known as a solution because seawater has the same properties across the entire mixture.
Is ocean water a substance or an element?There are numerous distinct chemicals in seawater. When the water in seawater evaporates and salt is left behind, some of these substances can be seen. Pure substance made of hydrogen and oxygen is called water, or H2O.Salts and water combine to form seawater. The salts are referred to as the solute and the water as the solvent in this mixture.Water is a common substance. Hydrogen and oxygen are the two elements that make up water.Water consists of two hydrogen atoms and one oxygen atom in each individual particle. The smallest component of a compound is a molecule.Because it contains the same concentration of each of its components throughout the solution and can be physically separated, salt water qualifies as a solution. and the O represent for the elements oxygen and hydrogen, respectively.To learn more about ocean water a substance or an element refer to:
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Why does it make sense that acetyl-coa stimulates the activity of pyuruvate carboxylase?.
Accumulation of acetyl-coA carboxylase indicates a lack of oxaloacetate, which in turn promotes pyuruvate carboxylase activity.
What is acetyl-coa?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.
How is Acetyl-CoA formed and what is the function of it?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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consider the reaction. 2pb(s) o2(g)⟶2pbo(s) an excess of oxygen reacts with 451.4 g of lead, forming 349.3 g of lead(ii) oxide. calculate the percent yield of the reaction.
The percent yield of the reaction is 77.1% while forming lead oxide.
What is atomic mass?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.
How to calculate percent yield?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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Why does it make sense that acetyl-coa stimulates the activity of pyuruvate carboxylase?.
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.
Why is it logical that acetyl-CoA would cause pyruvate carboxylase to be activated?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.
How does pyruvate carboxylase become activated by acetyl-CoA?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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mg 2 naf → mgf2 2 na if you start with 5.5 grams of sodium fluoride, how many grams of magnesium fluoride will be produced?
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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this reaction makes potassium superoxide useful in a self-contained breathing apparatus. how much o2 could be produced from 2.41 g of ko2 and 4.62 g of co2?
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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Consider atoms of oxygen and fluorine. Which atom will be the least likely to lose an electron to form an ion and why?
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.
what is the volume occupied by 15.2 g of argon gas at a pressure of 1.04 atm and a temperature of 353 k ?
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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Which of the following provides the best explanation for why the water drop does not slide off the inclined plane?
O A The polar water molecules are absorbed by the underlying surface O B The polar water molecules cause the surface to become temporarily charged, causing adhesion
O C The polar water molecules exert strong cohesive forces on one another
O D The polar water molecules are repelled by the nonpolar surface
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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if a 0.05 m aqueous nacl solution is placed in contact with an aqueous 0.05 m licl solution which side of the 0.05 m nacl | 0.05 m licl junction will be positive? the mobilities of these ions in water at 25 ºc are: li
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.
What is an aqueous solution example?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).
What happens to NaCl when dissolves in water?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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a gas mixture contains rn, he and n2. what is the total pressure of the mixture, if the mole fraction of n2 is 0.300 and the partial pressure of n2 is 0.520 atm?
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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Pentane (C5H12) is a component of gasoline that burns according to the following balanced equation:
C5H12(l)+8O2(g)→5CO2(g)+6H2O(g)
Calculate ΔH∘rxn for this reaction using standard enthalpies of formation. (The standard enthalpy of formation of liquid pentane is -146.8 kJ/mol.)
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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Calculate the normal boiling point of chloroform given that the standard enthalpy of vaporization of chloroform is 31. 4 kj/mol and the standard entropy of chloroform is 93. 7 j/mol·k.
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.
What is the purpose of chloroform?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.
Chloroform: lethal or not?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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why do different types of atoms (elements) give off or absorb different spectral lines? group of answer choices
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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a 10.0 cm3 container of helium is sealed at 22.0 °c and 1.00 atm pressure. what pressure would be exerted by the helium if the container were heated to 220 °c?
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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if increasing the oxidizing power of the environment causes the corrosion rate to slow, the material is known as
On increasing the oxidizing power of the environment, the corrosion rate slows, the material is known as Noble material.
What is corrosion?
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.
Noble material: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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suppose 14c-labeled co2 is used to form malonyl-coa from acetyl-coa. if this labeled malonyl-coa is used for palmitate synthesis, which carbon atom(s) in the fatty acid would be radiolabeled?
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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what atomic or hybrid orbitals make up the sigma bond between s and f in sulfur hexafluoride, sf6 ? orbital on s orbital on f what are the approximate f-s-f bond angles ? (list all possible) ... fill in the blank 3 °
Fluorine contains one total bond, three lone electron pairs, and is sp3, hybridized, thus our approximate bond angles will be 90 degrees. Sulfur is sp3 de hybridized.
What three hybrid orbitals are there?One s orbital and three p orbitals combine to generate four sp3 orbitals, each of which has a 25% s character and a 75% p character. This process is known as sp3 hybridization. Anytime an atom is surrounded by four groups of electrons, this kind of hybridization is important.
Describe hybridization using an example?The process of merging two atomic orbitals to produce a new variety of hybridized orbitals is known as hybridization. Typically, this mixing creates hybrid orbitals with entirely distinct energies, forms, and sizes.
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What happens in a collision if both objects are moving?? And What happens in a collision if only one object is moving?? 50 pointssss
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."
Explanation:WARNING: PLAGIARISM IS A REAL THING AND CAN AFFECT YOUR EDUCATION, THAT IS WHY I HAVE PLACED DOWN MY SOURCE SO THAT YOU DO NOT GET IN TROUBLE. DO NOT COPY THIS ANSWER WORD FOR WORD ON YOUR HOMEWORK. USE THIS AS A SOURCE, AND MAKE IT YOUR OWN:
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An aqueous solution of an unknown solute is tested with litmus paper and found to be basic. The solution is weakly conducting compared with a solution of NaCl of the same concentration. Which of the following substances could the unknown be:NaOHCH3COCH3NH3H3PO3HNO3
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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showing the behavior of several different gases follow. which of these gases exhibit behavior significantly different from that expected for ideal gases?
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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use arrows to sketch the circulation in the estuary, including any upwelling/downwelling and freshwater transport across the sea surface, and indicate the volume transport associated with each of the arrows you have sketched.
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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What is the net ionic equation when hydrobromic acid reacts with potassium hydroxide?.
HBr + KOH = KBr + H2O is the net ionic equation for the reaction between potassium hydroxide and hydrobromic acid.
What is an ionic equation and how to write it for the given reactants?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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which of the following compounds would be considered an electrolyte? a. c6h12o6 b. naoh c. co2 d. agcl
Answer: B: NaOH
Explanation:
consider a hydrogen atom is in its second excited state. what is the shortest wavelength photon it can emit? give your answer in nanometers.
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?
Thesolar Bohr model, also known as the Rutherford-Bohr model, was first proposed by Niels Bohr and Ernest Rutherford in 1913 and describes an atomic system with an orbiting system of electrons and a small, dense nucleus that is similar to the Solar System in structure but is attracted by electrostatic forces rather than gravity.It followed the solar system models Joseph Larmor (1897), Jean Perrin (1901), cubical (1902), Hantaro Nagaoka Saturnian (1904), plum pudding (1904), Rutherford (1911), quantum Arthur Haas (1910), and nuclear quantum John William Nicholson (1911). (1912).The new quantum physical interpretation put forth by Haas and Nicholson, forgoing any attempt to align with classical physics radiation, was the main improvement over the 1911 Rutherford model.To know more about the Bohr's atomic model, click the link given below:
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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), what is the wavelength?
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.
What do you mean by wavelength ?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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calculate the final concentration of the solution when water is added to prepare each of the following solutions. part a 25.0 ml of a 22.0 m hcl solution is diluted to 440. ml
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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which are examples of reversible reactions?
Answer:
- Pb(NO3)2+2NaI→PbI2+2NaNO3.
- AgNO3+HCl=AgCl+HNO3.
- 2Na+2H2O=2NaOH+H2.
- KNO3+NaCl=KCl+NaNO3.
what are the driving forces for double displacement reactions? consider the reaction below and determine the spectator ions. k2s(aq) 2hcl(aq) → 2kcl(aq) h2s(g) what is the driving force for the reaction in ii?
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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