We would need 1.5 moles of oxygen
What is the mole?The mole is a unit of measurement used in chemistry to express the amount of a substance. One mole is defined as the amount of a substance that contains the same number of particles (such as atoms, molecules, or ions) as there are atoms in exactly 12 grams of carbon-12. This number of particles is known as Avogadro's number, which is approximately 6.022 x 10^23 particles per mole.
We have the correct reaction equation as;
2H₂ + O₂ →2 H₂O
If 1 mole of oxygen makes 2 moles of water
x moles of oxygen makes 3 moles of water
x = 1.5 moles
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classify each reaction as homolysis or heterolysis.A) homolysis, hetrolysis, hetrolysis, hetrolysisB) homolysis, hetrolysis, hetrolysis, homolysisC) homolysis, homolysis, homolysis, homolysisD) hetrolysis, hetrolysis, homolysis, homolysis
Answer:
hello hello mike testing mike testing hello hello hello hello I think you cannot hear my voice
exactly 6.00 x 10-3 moles (0.3923g) of zinc metal is dissolved in dilute hcl(aq) in an ice calorimeter. the heat released melts enough ice to produce a volume change of 0.254 ml in the ice-water mixture surrounding the reaction vessel. calculate the enthalpy change per mole of zinc for the reaction:
Calculate the reaction's enthalpy change for mole of reacting zinc: Z n (s) = Zi n C l (2 (a q) + H 2 Z n (s) (+ 0.5 H C l (a q) ( g ) -153.86 kJ is the enthalpy change.
What happens when you combine water with ice?Instead of sending the heat energy directly to a water when the ice strikes it, it absorbs it. It melts as a result. Strangely, when you put ice ice in the water, the opposite occurs. The water receives direct thermal energy transfer that causes it to melt.
What transpires to the ice as it absorbs heat?It becomes hotter as just a result of someone being heated. The ice begins to melt and transform into liquid water as the temperatures stops rising. The process of melting involves changing a solid into the a liquid.
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are there any hydrogen bonds between the cut sites in smai? A. yes B. no
No, there is no hydrogen bonds between the cut sites in smai. The correct option is B.
The blunt ends have the Smai will create after the cutting. The hydrogen bonds are the very special class of the intermolecular attractive forces that will arise only in the compounds that is featuring the hydrogen atoms bonded to the highly electronegative atom with the other highly electronegative atom.
The hydrogen bonds are of the two types , these are as follows :
The intermolecular hydrogen bondingThe intramolecular hydrogen bondingThe Hydrogen bonding is the special type of the dipole - dipole attraction in between the molecules.
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how to make absolute value in python?
The built-in method abs() in Python may be used to determine a number's absolute value. Here's an illustration: In this example, we initially gave the variable x the number -5. Then, wethe absolute value of
Regardless of whether a number is positive or negative, its distance from zero on the number line represents its absolute value. The built-in method abs() in Python may be used to determine a number's absolute value. This function returns the absolute value of a single input, which may be an integer, a floating-point number, or a complex number. A positive number's absolute value equals the number itself, but a negative number's absolute value is the polar opposite of the positive number. The absolute value is frequently employed in mathematical computations and programming applications to ensure that values are treated consistently regardless of their sign. The absolute value is
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Rank the following aqueous solutions from lowest predicted boiling point to highest. In the case of solutions containing aqueous ions, assume there is no ion clustering in the solution. 1st attempt Feedback hithi See Periodic Table 0 See HintxQuestion List (5 items) Correct Answer List (Drag and drop into the appropriate area)
The solutions can be ranked as follows from lowest to highest boiling point:
0.1 M glucose (C6H12O6)
0.1 M KCl
0.1 M NaCl
0.1 M CaCl2
0.1 M AlCl3
The boiling point of a solution depends on the concentration and identity of solutes dissolved in the solvent. The presence of solutes in a solution can increase or decrease the boiling point of the solution relative to the pure solvent.
When ranking aqueous solutions in terms of boiling point, the key factor to consider is the number of solute particles in solution. The greater the concentration of solute particles, the higher the boiling point of the solution.
Glucose is a non-electrolyte and does not dissociate into ions in solution, so it has the lowest boiling point. The next three solutions all contain one or two electrolytes that dissociate into two or three ions in solution, respectively, increasing the number of solute particles and therefore the boiling point. Finally, AlCl3 is the most ionic and produces the greatest number of ions in solution, leading to the highest predicted boiling point among the given solutions
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what is the acetic acid molar mass ?
The molar mass of acetic acid (CH3COOH) is approximately 60.05 grams per mole.
To arrive at this value, we can calculate the atomic masses of each element in the molecule and add them up:
Carbon (C): 12.01 g/mol
Hydrogen (H): 1.01 g/mol x 2 = 2.02 g/mol
Oxygen (O): 16.00 g/mol x 2 + 1.01 g/mol = 32.02 g/mol
Adding these up, we get:
12.01 g/mol + 2.02 g/mol + 32.02 g/mol = 46.05 g/mol
However, since there are two oxygen atoms in the molecule, we must add an additional 16.00 g/mol for a total of:
46.05 g/mol + 16.00 g/mol = 60.05 g/mol
Therefore, the molar mass of acetic acid is approximately 60.05 grams per mole.
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Barium sulfide decomposes into its
elements when heat and electricity are
applied.
Which reaction shows the balanced
equation for the decomposition?
A. 8BaS→ 8Ba + Sg
B. Ba₂S → 2Ba + S
C. BaS2
Ba + S₂
->
D. 2Ba₂S 4Ba + 2S
->
MARINA VINNSAMAN
A balanced equation obeys the law of conservation of mass. Here the balanced equation for the decomposition of Barium sulfide is 8 BaS → 8Ba + S₈. The correct option is A.
What is balanced equation?A chemical equation in which the amount of reactants and products on both sides of the equation are equal is defined as the balanced equation. The number of atoms of each element of the reactants and products are same on either side of the equation.
Here the balanced equation for the decomposition of Barium sulfide is denoted as:
8BaS→ 8Ba + S₈
The number of 'Ba' and 'S' atoms on both sides of the equation are equal.
Thus the correct option is A.
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what is nystatin swish and swallow
Nystatin is an antifungal medication that is commonly used to treat fungal infections of the mouth and throat. Nystatin swish and swallow is a method of delivering the medication directly to the affected area in order to treat these types of infections.
The swish and swallow method involves taking a liquid suspension of nystatin and swishing it around in the mouth for several minutes before swallowing it. The medication is designed to coat the mouth and throat, allowing it to come into contact with any fungal infections that may be present.
To use the swish and swallow method, the patient should first shake the medication well to ensure that it is evenly mixed. The recommended dosage of nystatin will vary depending on the severity of the infection and other individual factors, so patients should follow the instructions provided by their healthcare provider.
To administer the medication, the patient should take a small amount of the suspension into their mouth and swish it around for several minutes, making sure to coat the entire mouth and throat. The medication should not be swallowed immediately, as it is important to allow it to come into contact with any fungal infections that may be present.
After several minutes of swishing, the patient should swallow the medication, being careful not to spit it out or rinse their mouth with water immediately after. This allows the medication to continue to work in the mouth and throat, providing effective treatment for fungal infections.
Side effects of nystatin swish and swallow are typically mild and may include nausea, vomiting, and diarrhea. Patients who experience more severe side effects or allergic reactions should contact their healthcare provider immediately.
In summary, nystatin swish and swallow is a method of delivering an antifungal medication directly to the mouth and throat in order to treat fungal infections. Patients should follow the instructions provided by their healthcare provider and swish the medication around in the mouth before swallowing. Side effects are typically mild, and patients who experience more severe side effects or allergic reactions should contact their healthcare provider immediately.
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hot dry air moves into the southwest in the summer fronm an ____ air mass
Answer:
tropical continental
Explanation:
tropical continental are hot dry air masses. They form in summer mostly over Southwestern US and Northern Mexico.
Select all TRUE statements about noncovalent bonding interactions.
A.)Noncovalent interactions can be intramolecular - between atoms in the same molecule.
B.) In a protein, ionic interactions are the weakest and van der Waals interactions are the strongest.
C.) The strength of a noncovalent interaction depends on the magnitude of the charge and whether it is permanent or temporary.
D.) All noncovalent bond interactions are inherently electrostatic in nature.
Noncovalent interactions between elements in the same molecule are known as intramolecular interactions.
Describe element noun.
I made the decision to walk in spite of the awful weather by braving the elements. New component required for the kettle. For the vast majority of home buyers, having a second source of income is crucial. They have all the qualities of a strong squad. Although she exaggerated, there was some truth to what she said.
Which words are equivalent to "element"?
element Units that are a portion of whole or entire substances, organizations, compounds, or combinations are referred to as elements, components, constituents, or ingredients. Element refers to a fundamental, essential component: the building blocks of matter; break the issue down into its component parts.
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Select the solvents that are commonly used to prepare a sample for 'H NMR. a) deuterium oxide. b) acetone. c) acetone-d6. d) chloroform-d. e) dimethyl sulfoxide.
The solvents that are commonly chloroform-d used to prepare a sample for 'H NMR.
The correct option is D.
What is chloroform used for?Chloroform is a solution, or a substance that helps dissolve other substances. Along with the building, paper, and board sectors, it is also used in the production of insecticides and films. It functions as a solvent for rubber, floor polish, resins, adhesives, opiates, fats, and oils.
Is chloroform a drug of any kind?Chloroform was occasionally used as a drug or in attempts. Chloroform may exert its effects by speeding up the potassium ion flow through certain potassium channels found in nerve cells.
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The positive control for the Iodine test was the
A. Glucose solution.
B. Olive oil.
C. Albumin solution.
D. Starch solution.
E. Distilled water.
The positive control for the Iodine test was the Starch solution. The correct option is D.
In the iodine test , the negative control is the distilled water. The positive control is the starch solution. The iodine test is used to test for the starch. It interacts with the coiled molecules and it becomes the bluish - blackish color. The yellow color is the negative test for the starch. The iodine - starch test is the chemical reaction that is used for the test for the presence of the starch or for the iodine.
Thus, the starch solution is the positive control for the iodine test.
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devise a synthesis of ch3ch2ch2cho from two-carbon starting materials. be sure to answer all parts.
The synthesis of CH3CH2CH2CHO from two-carbon starting materials involves the formation of acetylene from calcium carbide and water, followed by hydrogenation to form ethane.
What happens in a chlorination reaction?A chlorination reaction is a chemical reaction in which one or more chlorine atoms are introduced into a molecule, either in place of another atom or as an addition to the molecule. The general equation for a substitution chlorination reaction is:
RH + Cl2 -> RCl + HCl
One possible synthesis of CH3CH2CH2CHO, also known as butanal, from two-carbon starting materials is:
Step 1: Formation of acetylene (C2H2) from calcium carbide and water.
CaC2 + 2H2O -> C2H2 + Ca(OH)2
Step 2: Hydrogenation of acetylene to form ethane (C2H6).
C2H2 + 2H2 -> C2H6
Step 3: Reaction of ethane with chlorine (Cl2) to form 1-chloroethane (C2H5Cl).
C2H6 + Cl2 -> C2H5Cl + HCl
Step 4: Reaction of 1-chloroethane with sodium cyanide (NaCN) to form 1-cyanopropane (C3H7CN).
C2H5Cl + NaCN -> C3H7CN + NaCl
Step 5: Hydrolysis of 1-cyanopropane to form butanal (CH3CH2CH2CHO).
C3H7CN + 2H2O -> CH3CH2CH2CHO + NH3
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what is inner transition metals?
F- blocks elements are called inner transition metals. It occupies a position between the elements lanthanum and hafnium and between actinium and rutherfordium.
In the Periodic table, the inner transition elements are sometimes called the f-block elements since in this region the f-orbitals are being filled in. The elements constituting the f-block or inner transition metals are those in which 4f and 5f orbitals are progressively filled. These elements are the members of group 3 but shown separately as f-block of the periodic table. The elements of f-block are called inner transition elements. There are 28 inner transition elements in the periodic table. The inner transition elements are two series of elements known as the lanthanoids and actinoids.
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___ a mixture of elements that has metallic properties
Answer:
An alloy
Explanation:
An alloy is a mixture of elements that has metallic properties.
How amino acids combine to form protein?
Amino acids combine to form proteins through a process called protein synthesis, which involves two main steps: transcription and translation.
• Transcription: In the first step, the DNA sequence that codes for a particular protein is transcribed into a messenger RNA (mRNA) molecule. The mRNA carries the genetic information from the DNA in the nucleus of the cell to the ribosomes, which are located in the cytoplasm.
• Translation: In the second step, the mRNA sequence is read by the ribosomes and translated into a specific sequence of amino acids, which are linked together to form a protein. During translation, transfer RNA (tRNA) molecules bring the appropriate amino acids to the ribosome, where they are added to the growing protein chain in a specific order dictated by the mRNA sequence.
The sequence of amino acids in a protein is determined by the sequence of nucleotides in the DNA that codes for that protein. The specific sequence of amino acids in a protein determines its three-dimensional structure and its function in the body. Proteins are essential for many biological processes, including cell signaling, enzymatic reactions, and structural support.
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What is the formal charge of a nitrogen atom that has no lone pairs and forms two double bonds? 0 -2 0 -1 0 0 0 '1 0 +2
The formal charge of a nitrogen atom that has no lone pairs and forms two double bonds is +1 .
The atomic number of nitrogen is 7. This indicates that the number of electrons present in nitrogen are 7 and hence the electronic configuration for it is 2,5.
This indicates that the valence electrons in nitrogen are 5. Valence electrons of an atom are the number of electrons present its outermost shell.
Now , Nitrogen has 5 valence electrons and it is forming two double bonds. While the formation of bonds sharing of electrons takes place , therefore , 4 electrons get shared and one electron remains.
Now to gain stability , Nitrogen loses one electron and has +1 charge on it.
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What is the evaporation heat of water?
The quantity of heat energy needed to totally turn one unit of mass of liquid water into water vapor at a constant temperature and pressure is known as the evaporation heat of the water.
The "latent heat of vaporization" is the name of this process.
The intensity of the attractive interactions between the water molecules is gauged by the heat of evaporation.
Liquid water molecules gather energy and start to move more quickly when heat is introduced. As a result, some of the molecules at the liquid's surface acquire sufficient energy to separate from the surface and transition into the gas phase.
The latent heat of vaporization is the amount of energy needed to rupture these intermolecular interactions and change the liquid into vapor.
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which will be the final volume when 400 ml of 0.6 m hcl is diluted to 0.5 m hcl?
The final volume is when the 400 ml of 0.6 M HCl is diluted to the 0.5 M HCl is 480 mL.
The initial molarity of the solution , M₁ = 0.6 M
The initial volume of the solution, V₁ = 400 mL
The final molarity of the solution, M₂ = 0.5 M
The final volume of the solution, V₂ = ?
The dilution law is expressed as :
M₁ V₁ = M₂ V₂
V₂ = M₁ V₁ / M₂
V₂ = ( 0.6 × 400 ) /0.5
V₂ = 480 mL
Thus, the final volume of the solution is 480 mL with the molarity of the 0.5 M.
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Which statement describes the changes that are happening to the butterfly during its larva stage?
The larva is getting ready to lay more eggs.
The larva is growing new limbs and wings, transforming into an adult.
The larva is ready to hatch from an eggshell.
The larva is shedding layers of skin and preparing to create a chrysalis.
The butterfly's larval stage is characterized by the following statement: "The larva is generating new limbs as well as wings, transitioning into an adult."
Explain about the butterfly during its larva stage?After birth as well as hatching and before reaching adulthood, many animals go through the larval stage of development, sometimes known as larvae or larvas.
These young, active forms are physically distinct from adults and have evolved to live in a different setting. The "larva" or "caterpillar" develops as the egg hatches. Caterpillars constantly consume because they need to grow quickly.The caterpillar transforms into a "chrysalis" or "pupa" when it reaches its adult size. They are changing internally, going through a "metamorphosis." The elements that make up a butterfly are starting to take shape.Thus, the butterfly's larval stage is characterized by the following statement: "The larva is generating new limbs as well as wings, transitioning into an adult."
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what is the ph of a 1.0 x 10–2-molar solution of hcn? (for hcn, ka = 4.0 x 10–10.) (a) 10 (b) between 7 and 10 (c) 7 (d) between 4 and 7 (e) 4
The pH of 1 X 10-2 M HCN acid is 5.7
D) between 4 and 7
HCN is weak acid dissociate as
HCN + H2O \rightleftharpoons H3O+ + CN-
Ka = [CN- ][H3O+] / [HCN]
but [CN- ] = [H3O+] = x
Ka = [x][x] / [HCN]
Substitute the value in equation
4.0X 10-10 = [x]2/ 1 X 10-2
[x]2 = 4.0X 10-10 X1 X 10-2 = 4.0 X 10-12
[x] = 2.0 X 10-6 M
Concentration of H3O+ = 2 X 10-6 M
pH = - log[H3O+]
pH = - log (2 X 10-6)
pH = 5.7
What is HCN?Prussic acid, also known as hydrogen cyanide, is a chemical substance with the formula HCN and the structural formula HCN. It is a colourless, incredibly poisonous, and flammable liquid that boils at 25.6 °C (78.1 °F), just slightly above room temperature.
Industrial-scale HCN production makes it a highly prized precursor to a wide range of chemical compounds, from pharmaceuticals to polymers. Production of potassium cyanide and adiponitrile, which are used in mining and plastics, respectively, has large-scale applications. Due to its volatile nature, it is more toxic than cyanide compounds that are solid.
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The first-order decomposition of N2O5 at 328 K has a rate constant of 1.70 . 10-3 s-1. If the initial concentration of N2O5 is 2.88 M, what is the concentration of N2O5 after 12.5 minutes?
The concentration of N2O5 after 12.5 minutes is 1.094 M.The rate law for a first-order reaction is given by:
Rate = k[A]
where k is the rate constant and [A] is the concentration of the reactant.
The integrated rate law for a first-order reaction is given by:
ln[A]t = -kt + ln[A]0
where [A]t is the concentration of the reactant at time t, [A]0 is the initial concentration, k is the rate constant, and ln is the natural logarithm.
Using the given rate constant and initial concentration of N2O5, we can calculate the concentration of N2O5 after 12.5 minutes as follows:
ln([N2O5]t/[N2O5]0) = -kt
ln([N2O5]t/2.88 M) = -(1.70 x 10^-3 s^-1)(12.5 min)(60 s/min)
ln([N2O5]t/2.88 M) = -1.530
[N2O5]t/2.88 M = e^-1.530
[N2O5]t = (e^-1.530)(2.88 M)
[N2O5]t = 1.094 M
Therefore, the concentration of N2O5 after 12.5 minutes is 1.094 M.
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1‑bromobutane undergoes dehydrohalogenation by an e2 elimination mechanism when heated with potassium tert‑butoxide.
Answer:
Yes, that is correct. When 1-bromobutane is heated with a strong base like potassium tert-butoxide, it undergoes dehydrohalogenation via an E2 (elimination bimolecular) mechanism, in which the bromine atom is removed from the molecule along with a proton from a neighboring carbon atom. This results in the formation of an alkene (butene) and a molecule of hydrogen bromide. The reaction follows second-order kinetics because it involves two species (1-bromobutane and the base) in the rate-determining step.
Explanation:
Which of these examples represents a system at equilibrium?
These fish swim under a plant and five other fish come out from the plant
In a sealed flask, 500 water molecules vaporize while 500 other water molecules condense
A chef puts two pizzas into the oven and takes five pizzas out
Examples that represents a system at equilibrium are : These fish swim under a plant and five other fish come out from plant; In a sealed flask, 500 water molecules vaporize while 500 other water molecules condense.
What is meant by equilibrium?Condition in the course of reversible chemical reaction in which no net change in the amounts of reactants and products occurs is called chemical equilibrium.
Chemical equilibrium is the state when both the reactants and products are present in the concentrations which have no further tendency to change with time, so that there is no observable change in properties of system.
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How do you find the molar mass of ethanol?
To find the molar mass of ethanol, which has the chemical formula C₂H₅OH, you need to calculate the sum of the atomic masses of all the atoms in one molecule of ethanol.
Look up the atomic masses of each element in the formula:
Carbon (C): 12.01 g/mol
Hydrogen (H): 1.01 g/mol
Oxygen (O): 16.00 g/mol
Count the number of atoms of each element in one molecule of ethanol:
2 atoms of carbon (C)
6 atoms of hydrogen (H)
1 atom of oxygen (O)
Multiply the atomic mass of each element by the number of atoms of that element, then add the results together
(2 x 12.01 g/mol) + (6 x 1.01 g/mol) + (1 x 16.00 g/mol) = 46.07 g/mol
Therefore, the molar mass of ethanol is approximately 46.07 g/mol.
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the instructor reveals that the weak acid is hypochlorous acid, hocl. the known ka for hocl is 4.0×10-8. what is the percent error in the experiment?
The percent error in the experiment is 12.5%
What is a Percentage Error?When comparing the estimated value to the actual value, the percent error is the difference, and it is given as a percentage.
How to find the percent error,
Let us find the % error in the experiment:
Given [tex]K_a = 4.0 * 10^-^8[/tex]
Original; Ka= 3.5 x 10^-8
Percent error = accepted value - experimental value/accepted value x 100
= 4.0 x 10^-8 - 3.5 x 10^-8/4.0 x10^10^-8 x 100
= 12.5%
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lithium one of the major chemical building blocks of modern life
True or False
The given statement is "lithium one of the major chemical building blocks of modern life" is false. Lithium is not the budling block of the modern life.
The Lithium is not one of the major chemical the budling block of the modern life. The building blocks of the modern life is the carbon , oxygen, and the nitrogen. There are the six main elements that are the fundamental unit of the building blocks of the life. The order of the buildings blocks of the modern life from the least common to the most common is as follows :
The sulfur, the phosphorous, the oxygen, the nitrogen, the carbon, and the hydrogen.
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what caused the object filled with water to respond the way it did when it was subjected to the flame?
When heated, the water got bigger. Because the water was so salty, salt crystallised on the surface of the container. Because the water cannot hold much heat, the bottom was able to immediately warm up.
What does water evaporation heat actually mean?A estimated estimate of the evaporation process of water is 3.5 kJ/kg, or 40.8 kJ/mol. The opposite of condensation is the process of vaporisation. The condensate heat is described as the heat released whenever one atom of the compound polymerizes at its boiling point of water under normal pressure.
What does water vaporisation heat entail?Water vaporisation heat is approximately 2,260 kJ/kg, or 40.8 kJ/mol. Condensation is the process that vaporisation is the opposite of. The heat emitted when one mole of a substance condenses now at boiling point under normal pressure is known as the heat of condensation.
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which kind of energy is store din a chemical bond
The kind of the energy that is store in the chemical bond is the type of the potential energy.
The kind of the energy that is store in the chemical bond is the type of the potential energy. The Potential energy is the energy that is not be in used yet, but the energy that is is stored and in awaiting the use. The chemical bond is the example of the potential energy. The bonds formed in between the atoms and the molecules in the substances hold the energy.
Thus, the potential energy is stored in the chemical bond formed in between the atoms or the molecules.
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When a more complex compound breaks down into two simpler ones
Answer:
Displacement reaction
Explanation:
