Answer:
i think its Yes. The bubbles contain hydrogen and oxygen that separated from the water but i could be wrong so i would just wait to see if anybody else says anything
Explanation:
State where metals are found in the periodic table.
Answer:
The metals are to the left of the line except for hydrogen because it is a nonmetal
Explanation:
In a reaction, 2-methylbutan-1-ol is oxidised by potassium
dichromate.
Name and draw (as displayed
formula) the two products of this reaction.
Answer:
Explanation:
Alcohols can be oxidised by a variety of oxidising agents. Sodium or potassium dichromate acidified with dilute sulphuric acid can bring about oxidation in straight chained alcohols.
Answer:
2-methylbutan-1-ol is oxidised by potassium dichromate: 2-methylbutan-1-ol + [O] ==> 2-methylbutan-1-al + water CH3CH2CH(CH3) CH2OH + [O] ==> CH3CH2CH(CH3) CHO + H2O
Explanation:
The table shows several useful salts formed from reactions between different acids and bases. In order, these salts are used to control dust on roads, absorb water in antiperspirants, disinfect materials, and detect radiation. Use the pattern shown in the table to answer the question.
Name of Salt Formula of Acid Formula of Base Formula of Salt
Magnesium chloride HCl Mg(OH)2 MgCl2
Aluminum nitrate HNO3 Al(OH)3 Al(NO3)3
Sodium bromide HBr NaOH NaBr
Lithium fluoride ? ? LiF
Which two formulas will correctly complete the table for lithium fluoride?
The chemical formula of salt can be easily understood from the formulas of the acid and base from which it is formed. The salt LiF is formed from the acid LiOH and HF.
What is acid-base reaction ?An acid -base reaction is called neutralization reaction because, the acidity and basicity of the two compounds is vanishing. Neutralization reactions gives the product called salts.
Acids donate their protons to the base and bases donate their electrons to acids forming the salt.
Lithium fluoride is salt formed from the acid -base reaction of hydrofluoric acid and lithium hydroxide. the reaction can be written as:
LiOH + HF → LiF + H₂O
Hence. the two missing formulas are LiOH and HF.
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Valence bond theory predicts that tin will use _____ hybrid orbitals in SnCl3-.
A) sp B) sp2 C) sp3 D) sp3d E) sp3d2
Answer:C
Explanation:
In the experiment shown schematically below, a beam of neutral atoms is passed through a magnetic field. Atoms that have unpaired electrons are deflected in different directions in the magnetic field depending on the value of the electron spin quantum number. In the experiment illustrated, we envision that a beam of hydrogen atoms splits into two beams. (a) What is the significance of the observation that the single beam splits into two beams? (b) What do you think would happen if the strength of the magnet were increased? (c) What do you think would happen if the beam of hydrogen atoms were replaced with a beam of helium atoms? Why? (d) The relevant experiment was first performed by Otto Stern and Walter Gerlach in $1921 .$ They used a beam of Ag atoms in the experiment. By considering the electron configuration of a silver atom, explain why the single beam splits into two beams.
In the experiment illustrated, we envision that a beam of hydrogen atoms splits into two beams:
The significance of the observation that the single beam splits into two beams is the experimental evidence for orbital angular momentum.The beam might appears earlier as the magnetic field strength increases.If the beam of hydrogen atoms were replaced with a beam of helium atoms, it will have no effect under a magnetic field, known as the diamagnetic effect. There is one electron in the 5s orbital, splitting it into two possible magnetic spin quantum numbers, and the paramagnetic effect Indicates +1/2 and -1/2 or less of the magnetic field.What is diamagnetic effect?Diamagnetism is a quantum mechanical effect that occurs in all materials. A material is said to be diamagnetic if it is the only contribution to magnetism. In paramagnetic and ferromagnetic materials, the weak diamagnetic force is overcome by the attractive force of the magnetic dipoles within the material .
(a) Hydrogen may split into two beams with magnetic spin quantum numbers of +1/2 and -1/2. So suppose a jet of hydrogen splits into two jets as it passes through the magnetic field. The significance of the observation is therefore the experimental evidence for orbital angular momentum.
(b) Already has two magnetic spin quantum numbers, so there is no change in the splitting of the ray as the magnetic field increases, but it only appears earlier as the magnetic field increases.
(c) Helium has an electron configuration of 1s² and an atomic number of 2. Because these electrons are paired, these paired electrons have no effect under a magnetic field, known as the diamagnetic effect.
(d) If we carry out experiments with silver with the electron configuration [Kr]4d¹⁰5s¹ and atomic number 47, there is one electron in the 5s orbital, splitting it into two possible magnetic spin quantum numbers, and the paramagnetic effect Indicates +1/2 and -1/2 or less of the magnetic field.
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Classify each nucleus as stable or unstable. Drag the appropriate items to their respective bins.
The longest isotope of tin is 126Sn, and it is also the most stable of the listed isotopes. All other isotopes contain 50 protons, making them unstable.
The nucleus is where?An electron cloud surrounds the nucleus, which contains four protons and five neutrons. Every atom has a nucleus in its center, as Ernest Rutherford discovered in 1911. Protons with positive electric charges and neutrons with no electric charges make up atomic nuclei.
A nucleus contains how many atoms?Each atom has a single nucleus. In the middle of an atom is its nucleus. The atom's nucleus, which is tiny, dense, and positively charged, is essentially empty space.
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A chemical reaction occurs when
H2O(g) forms H2O(l)
O2(g) forms O3(g)
O2(l) forms O2(s)
H2O(l) forms H2O(s)
A chemical reaction occurs when: H2O g → H2O l -- Exothermic ; O2(g) forms O3(g)-- Endothermic ; O2(l) forms O2(s)-- Endothermic and H2O(l) forms H2O(s) -- Exothermic.
What are endothermic and exothermic reactions?When steam or water vapor condenses to liquid water, then heat is released. And, the process is called exothermic.
The substance changing from liquid to gas is an example of endothermic reaction. This is because it absorbs energy to change from liquid to gas. Movement of water from liquid to gas is an example of this type of reaction and when water changes from liquid to gas, this is called evaporation.
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In paragraphs 11-16 of "Miss Brill," Mansfield includes the scene in which a young couple joins Miss Brill on her special bench. What is the significance of this scene? Select each correct answer. Miss Brill overhears their arguing and decides it is her role to interrupt and help them resolve their dispute. The story reaches its climax when Miss Brill realizes how others see her, and her sense of importance is destroyed. Miss Brill envisions the couple as the romantic heroes of the play she imagines all of them to be a part of The young couple takes the place of the old couple, just as younger generations replace older.
In paragraphs 11-16 of "Miss Brill," Mansfield includes the scene in which a young couple joins Miss Brill on her special bench and the significance of this scene includes the following:
The story reaches its climax when Miss Brill realizes how others see her, and her sense of importance is destroyed. Miss Brill envisions the couple as the romantic heroes of the play she imagines all of them to be a part of. What is the significance of this scene?In this scene, we can see Miss Brill having a good time in the park but coming to realize soon enough that the couple who she admired and planned to listen to did not think kindly of her. This made the woman sad even as she walked down to her home.
Her sense of importance was dealt a blow in this case. In this story also, Miss Brill applied her ability to envision a joyful scene.
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determine if either isomer of [fe(co)3cl3] is optically active.
None of the isomers of [fe(co)3cl3]are optically active.
We need to check for symmetry in the isomers in order to determine whether they are optically active. They are either optically inactive if they have symmetry or optically active if they do not. The mirror image method and the symmetry method are the two options. For the mirror image approach, the isomer is optically active if the chemical is non-superposable, or not identical to its mirror image. There are two isomers of the compound [Fe(CO)3Cl3]: a fac and a mer. Since the two structures in the case of the fac isomer are the same, it has no optical activity. Since the mer isomer are identical, it is also not optically active. This demonstrates that there are no optically active isomers.
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Which of the following gives the correct possible values of l for n = 4?
0, 1, 2, 3
–4, –3, –2, –1, 0, 1, 2, 3, 4
0, 1, 2, 3, 4
The possible values azimuthal quantum number l for n = 4 are 0 to (n-1), that is from 0 to 4.
What are quantum numbers?Quantum numbers are numbers describing the position and energy of electrons in different orbitals of an atom. An electron have a set of four quantum numbers.
The four quantum numbers are principal quantum number, azimuthal quantum number, magnetic quantum number and spin quantum number. No two electrons will have a equal set of these numbers.
The principal quantum number n is indicating the main energy level. Azimuthal quantum number l can have values from 0 to n-1. Hence, for n =4, l have values from 0 to 3. Thus option 1 is correct.
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A race car drives one lap around a race track that is 500 meters in length.
The displacement of the race car from the starting point is zero.
What is the displacement?We would need to be able to decipher the difference between the distance and the displacement because the understanding of this would help in the solution of the question.
We would have to know the the displacement is a vector while the distnace is a scalar as such, we would have to know the direction of the disolacement. If the car is moving round in a loop then it goes back to the starting point and the displacement is zero.
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Missing parts;
A race car drives one lap around a race track that is 500 meters in length. What is the displacement
Modify the following molecules so that they show the form that is dominant at physiological PH. a) cadaverine (b) octopamine
Modification the cadaverine and octopamine molecules are attached below.
What purposes does cadaverine serve?Cadaverine protects cells under anaerobic conditions from starvation for inorganic phosphate, Pi, and is crucial for cell survival at acidic pH levels. It controls a number of processes in plants, including plant development and growth, cell signaling, stress response, and insect defense.
In insect nervous systems, octopamine serves as a neuromodulator, neurotransmitter, and neurohormone and causes the entire organism to "take dynamic action."
A substance that is organic and closely related to noradrenaline is octopamine. Invertebrates use octopamine as both a neurotransmitter and a hormone. Tyrosine is converted to tyramine by tyrosine decarboxylase as the first step in the synthesis of octopamine.
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In the following reaction, Ni2+ is acting as a(n) Ni2+ )6H2)NiH2062+ (ag) O oxidizing agent O Lewis acid O precipitating agent O solvent O ligand
In the following reaction, Ni2+ is acting as a lewis acid.
What is lewis acid?A Lewis acid is a chemical species with an empty orbital that may accept an electron pair from a Lewis base to produce a Lewis adduct. A Lewis acid is thus any chemical that can receive a pair of nonbonding electrons, such as the H+ ion. In other words, a Lewis acid is an electron-pair acceptor. A Lewis base is any chemical that may give a pair of nonbonding electrons, such as the OH- ion. Accepting electrons is possible for an atom, ion, or molecule with an incomplete octet of electrons. Boron trifluoride (BF3) and aluminum fluoride are two examples (AlF3).
Here,
Ni2+ acts as a Lewis acid in the following process.
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What happens to water removed from a flowback well?
An injection into a deep well may have issues if it contaminates the water below the surface.
Injecting waste water into subterranean rock layers can be challenging if there are numerous wells nearby. Take porous sandstone as an example, which has tiny openings. Sandstone can be penetrated by water at high pressure, such as waste water from fracking, which can also move with subsurface water. To inject fluid underground into porous geologic formations, an injection well is used. These underground features could be anything from a tiny layer of soil to substantial sandstone or limestone. Examples of injected fluids include water, wastewater, brine (salt water), and water that has been mixed with chemicals. The pollution that fracking sites release, which contributes to health issues including asthma, children leukemia, heart illnesses, and others, is one of the consequences of fracking that deeply worries me.
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Which of the following steps of translation does NOT specifically require the hydrolysis of GTP? a)the peptidyl transferase reaction b)release of EF-Tu from the aminoacyl-tRNA inserted at the A site c)the movement of the ribosome one codon toward the 3′ end of the mRNA d)dissociation of certain release factors during termination
"The movement of the ribosome one codon toward the 3′ end of the mRNA" does NOT specifically require the hydrolysis of GTP.
What is hydrolysis?Any chemical reaction in which a molecule of water breaks one or more chemical bonds is referred to as hydrolysis. The word refers to substitution, elimination, and solvation processes in which water serves as the nucleophile. A chemical process in which water is utilized to break down a substance; this is accomplished by introducing a water molecule across a covalent link in the component. A hydrolysis reaction is the dissolution of a salt of a weak acid or base in water. Strong acids can be hydrolyzed as well. For example, dissolving sulfuric acid in water yields hydronium and bisulfate.
Here,
"The migration of the ribosome one codon nearer the 3′ end of the mRNA" does NOT necessitate GTP hydrolysis.
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Which of the following will remove aniline from & solution of aniline in diethyl ether? A. aqueous KBr B. aqueous HCI C. aqueous NaOH D. aqueous MgSOa E. aqueous CH:CO-Na
An amine called aniline (17) is soluble in diethyl ether but not in water; nonetheless, aniline can be obtained from diethyl ether by treating it with aqueous hydrochloric acid.
What compounds are soluble in diethyl ether?Diethyl aniline is an odourless, colourless to yellow liquid. It functions as a dyestuff intermediary and in organic synthesis. Diethyl aniline is listed as a hazardous substance because DOT, NFPA, and EPA have all mentioned it.
The amine aniline (17) may be separated from diethyl ether using aqueous hydrochloric acid, despite the fact that aniline is soluble in diethyl ether but not water.
The extensive range of chemical molecules, both polar and non-polar, that ethers like diethyl ether dissolve. Because ethers don't have a hydrogen bonding network that needs to be broken up to dissolve the solute, non-polar substances are often more soluble in diethyl ether than alcohols.
Therefore, the correct answer is option b) aqueous HCl.
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what property of a cathode ray is indicated when a magnet is brought near the tube?
The particle beam's mass to charge ratio. JJ Thomson determined how the magnetic and electric fields affected the beam's deflection. argued that the mass of the particles and their electric charge would determine how much the beam would deflect.
More mass per particle results in more inertia and less deflection. Greater force and deflection result from higher particle charge. More speed results in less deflection. When charged matter is exposed to an electromagnetic field, its electric charge a property of matter causes it to feel a force. An electric charge can be either positive or negative (commonly carried by protons and electrons respectively). Like and unlike charges are attracted to one another while being repelled by the other. Neutral describes a thing without any net charge. Classical electrodynamics, a term coined to describe early understanding of the interactions of charged particles, is still applicable to issues that do not demand for taking quantum effects into account. Electric charge is a conserved property, which means that the total positive and negative charges in an isolated system, or its net charge, cannot change. Particles at the subatomic level carry an electric charge. In regular matter, the protons in atoms' nuclei carry positive charge whereas the electrons carry negative charge. A substance will have a negative charge if there are more electrons than protons in it; a positive charge will be present if there are fewer electrons; and a neutral charge will be present if there are an equal number of electrons and protons.
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How many grams of beryllium chloride must be added to .2 L of water to make a 0.030 M solution?
According to molar concentration, 0.479 g of beryllium chloride must be added to 0 .2 L of water to make a 0.030 M solution.
What is molar concentration?
Molar concentration is defined as a measure by which concentration of chemical substances present in a solution are determined. It is defined in particular reference to solute concentration in a solution . Most commonly used unit for molar concentration is moles/liter.
Molar concentration is calculated by the formula, molar concentration=mass/ molar mass ×1/volume of solution in liters.In terms of moles, it's formula is given as molar concentration= number of moles /volume of solution in liters.
Substituting values in above formula,mass=0.030×79.91×0.2=0.479 g.
Thus, the mass of beryllium chloride that must be added to 0.2 L of water to make a 0.030 M solution is 0.479 g.
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Consider the rate law below.
R=K[(CH3)3 CBr] [H₂0]⁰
What is the overall order of the reactants in this reaction?
00
1
02
03
Answer: The overall order of a reaction is the sum of the exponents of the concentrations of the reactants in the rate law.
Given the rate law R = K[(CH3)3 CBr] [H₂0]⁰, we can see that the reactant [(CH3)3 CBr] has an exponent of 1 and the reactant [H₂0] has an exponent of 0. To find the overall order of the reactants, we add the exponents:
1 + 0 = 1
Therefore, the overall order of the reactants in this reaction is 1.
Select the gas with the largest root-mean-square molecular speed at 25∘ C.
a) All the gases have the same root-mean-square molecular speed at 25∘ C
b) He
c) SF6
d) CO2
e) CH4
The gas with the largest root-mean-square molecular speed at 25∘ C is : b) He.
What is meant by gas with the largest root-mean-square?The root mean square (R.M.S) speed V of the molecules of an ideal gas is given by the expression as , v=sqrt(3RTM) and v=sqrt(3KTm) where R is the universal gas constant, T is absolute (Kelvin) temperature, m is molar mass, K is Boltzmann's constant and M is molecular mass.
The root-mean square (RMS) velocity is the value of square root of the sum of squares of the stacking velocity values divided by number of values. RMS velocity is that of a wave through sub-surface layers of different interval velocities along specific ray path.
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draw a lewis structure (including all lone pair electrons) for the species GeBr4:
The Lewis structure for GeBr4 is shown below. It has a total of 32 valence electrons, with 6 in the lone pairs and 26 in the bonds. The structure is a tetrahedral geometry, with the central Ge atom bonded to four Br atoms.
The Lewis structure, also known as the electron-dot structure, is a type of diagram used to represent the valence electrons of an atom. It shows the number of electrons surrounding an atom, as well as how they are arranged around the nucleus. The Lewis structure is used to predict the geometry of a molecule, the reactivity of the molecule, and the types of bonds that the molecule can form. It is also used to determine the formal charge of each atom in a molecule.
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Genetic diversity is advantageous to a species because it:
leads to a smaller gene pool.
increases a species’ ability to adapt and survive.
decreases the number of organisms competing for resources.
makes organisms more susceptible to disease.
Answer:
increase a species ability to adapt and surviveExplanation:
hope this was helpful
How many hydrogen bonds will be found within an alpha helix that is 18 amino acids long? A) 14 B) 18 C) 22 D) 36
14 hydrogen bonds will be found within an alpha helix that is 18 amino acids long option - A is correct answer.
Alpha helix contains hydrogen bonds, right?Hydrogen bonds between the peptide bonds keep the -helix in place. Four amino acid residues ahead of each peptide bond C-O is a peptide bond N-H that is hydrogen bonded. The main chain's hydrogen bonds each C-O and N-H together.
Two hydrogen bonds involve each peptide link in an alpha helix. Four units ahead in the primary structure, the N-H of the peptide link and the C=O are hydrogen bonded.
As a result, the first amino acid's C=O and the fifth amino acid's N-H form a hydrogen bond.
The second amino acid's C=O forms a hydrogen bond with the sixth amino acid's N-H.
The third amino acid's C=O forms a hydrogen bond with the seventh amino acid's N-H.
The 14th amino acid's C=O forms a hydrogen bond with the 18th amino acid's N-H.
So there are 14 hydrogen bonds in total.
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A sample of milk in water appears cloudy and displays the Tyndall effect. It does not settle over time. How would the milk mixture be classified?
A. homogeneous mixture (solution)
B. heterogeneous mixture (suspension)
C. colloid
The milk mixture can be classified as colloid if the sample of milk in water does not settle over time.The option is C
What is colloid?Colloid is a mixture in which one substance consisting of microscopically dispersed insoluble particles is suspended throughout another substance.
There are types of Colloids such as :
Sol – It is a suspension of minute solid particles in a liquid.Emulsion – It is a colloid between two or more liquid with one consisting a dispersion of another liquid.Foam – It consists of gas dispersed in solid or liquid.Aerosol – It consists of a minute liquid or solid particles in a gasTherefore colloid is a mixture that has particles ranging between 1 and 1000 nanometers in diamete yet are still able to remain evenly distributed. Colloids are heterogeneous in nature.
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Which of the following compounds will have a prominent peak at (M-127)? a. CH3CH2CH2I b. (CH3CH2)3CCH2Cl c. (CH3)3CCH2CH2Br d. (CH3)2CHCH(CH3)2 e. none of these
The compounds that follow will show a noticeable peak at (M-127) are CH3CH2CH2I
What is meant by compounds?A compound in chemistry is a material that is created when two or more separate chemical elements are mixed in a specific order. The interaction of the elements creates chemical connections that are challenging to break. Shared or exchanged electrons between atoms cause the formation of these bonds. (KOM-pownd) A substance in science that is created through the chemical joining of two or more distinct elements Table salt (NaCl), which is derived from the elements sodium and chloride, and water (H2O), which is created from the elements hydrogen and oxygen, are two examples of compounds.A compound is a material that is created when two or more components are bonded chemically.To learn more about compounds, refer to:
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An electron in the second main energy level and the second sublevel is described by the symbols a. 1s.
b. 2s. c. 1p. d. 2p.
It is possible for an electron to be free or linked to an atom. An electron is a negatively charged subatomic particle (not bound).
What is in a electron?Unattached or attached to an atom, an electron is a negatively charged subatomic particle (not bound). One of the three main types of particles inside an atom, along with protons and neutrons, is an electron that is linked to the atom.
The tiniest and least massive component of an atom is an electron, which has a negative charge. In a neutral atom, the number of protons and electrons is equal. For instance, the hydrogen atom only contains one proton and one electron. While the uranium atom has 92 protons and, thus, 92 electrons.
The exterior of the nucleus is surrounded by negatively charged electrons in orbit.
Therefore, the correct answer is option d) 2p.
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Beryllium reacts with a certain element to form a compound with the general formula BeX. Determine (with evidence/working) the most likely formula for the compound formed between potassium an element X.
Beryllium having valency 2 reacts with a certain element to form a compound with the general formula BeX. Hence, KX is the most likely formula for the compound formed between potassium and element X.
What is Beryllium?A chemical element with the atomic number 4 and the symbol Be is referred as beryllium. It has the valency of 2. Beryllium is an alkaline earth metal that is steel-gray in color, tough, light, and brittle. It is a divalent element that only naturally occurs in minerals when combined with other elements. Beryl and chrysoberyl are well-known gemstones that contain a lot of beryllium.To know more about Beryllium visit
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electrolysis of dilute NaOH solution
Answer:
At anode: 4OH−→2H2O+O2+4e−
At cathode: 4H++4e−→2H2
Explanation:In aqueous NaOH solution, on electrolysis, we have the reduction potential of H+ is much more than Na+, so the reaction takes place (above)§
Solids have a __________ shape and are not appreciably __________.
Select one:
a. sharp, convertible
b. indefinite, compressible
c. indefinite, incompressible
d. definite, compressible
e. definite, incompressible
Answer:
e. definite, incompressible
your answer may include the following changes. select each of the changes that you included in your answer. heat the metal until it melts (physical change). attempt to react the metal with oxygen (chemical change). stretch the metal into a wire (physical change). attempt to react the metal with acid (chemical change).
If there is change in size of the substance it shows physical change. For example, when we stretch the metal into a wire the size changes. If a substance combine with another to form a new substance is said to be chemical change.
A substance is said to be undergo physical changes if there is a change in the size or form of matter. This changes include transitions from one state to another such as from solid to liquid or liquid to gas. Cutting, bending, dissolving, freezing, boiling, and melting are some of the processes that create physical changes. If we heat the metal untill it melts a physical change occurs. If we stretch a metal into a wire is a physical change.
A substance is said to be undergo a chemical changes when it combines with another to form a new substance. This process is also called as chemical decomposition into two or more different substances. These are called chemical reactions. These are not reversible except by further chemical reactions. Attempt to react the metal with oxygen shows a chemical change. Attempt to react the metal with acid shows the chemical change.
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The physical and chemical changes are:
heat the metal until it melts (physical change) : The melt will melt.
attempt to react the metal with oxygen (chemical change) : Metal oxide will form.
stretch the metal into a wire (physical change) : Ductility
attempt to react the metal with acid (chemical change) : Acid will dissolve the metal.
Any solid that dissolves when heated behaves similarly. It melts, undergoing a physical transformation. When the mobility of the molecules in a solid accelerates to a point where it outweighs the attraction between the molecules, melting takes place.
Metal oxide is created when a metal combines with oxygen. This reaction's general equation is metal + oxygen = metal oxide. When iron is exposed to air, rust, a type of iron oxide, slowly forms.
Ductility is the quality of metals that allows them to be hammered thin or stretched into wire without breaking. It is a physical attribute of a metal that allows for the creation of thin wire.
The metal dissolves as a result of loosening the bonds binding the metal's atoms together. Acids' capacity to dissolve metals is a chemical attribute because that is a chemical change.
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