Which of the following elements can be isolated by electrolysis of the aqueous salt shown? O Phosphorus from K3PO4 (aq) O Sodium from NaBr (aq) O Aluminum from AlCl3 (aq) O ch Fluorine from KF(aq) O lodine from Nal (aq)

The amount, in moles in 28 grams of [tex]UO_2[/tex] would be 0.1037 mol.

The mole of a substance is the ratio of the mass of the substance and the molar mass of the substance. This can be mathematically expressed as:

Mole = mass/molar mass

Molar mass of [tex]UO_2[/tex] = 238 + (16x2) = 270 g/mol

Thus, the number of moles in 28 grams of [tex]UO_2[/tex] would be:

Mole = 28/270 = 0.1037 mol

In other words, the number of moles in 28 grams of [tex]UO_2[/tex] would be 0.1037 mol.

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How many moles in 28 grams of UO2?

A law summarizes a set of observations about an experiment.

Chemical law: Most of the properties and the atomic structure of the elements vary periodically when the elements are arranged in the order of their atomic numbers.

A sound explanation for observations is referred to as a theory. A summary of the relationship between variables constitutes a scientific law. A controlled method of testing a hypothesis is through an experiment.

The fundamental chemistry laws in chemistry are considered to be the following three: the mass conservation principle. the principle of proportional equality. A multiple proportions law.

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Coca-Cola is making a version of Coke that uses sucrose (C12H22O11) instead of high fructose corn syrup. The molarity of sucrose in the Coke is 0.32 mol/L.

Coca-Cola is making a version of Coke that uses sucrose (C12H22O11) instead of high fructose corn syrup. If there are 39.24 grams of sucrose in a 12.0 fluid oz. can of this Coke, what is the molarity of sucrose in the Coke.

To find the molarity of sucrose in the Coke, we first need to find the number of moles of sucrose present in the can. We can use the mass of sucrose (39.24 g) and the molar mass of sucrose (342.3 g/mol) to find the number of moles of sucrose:

= (39.24 g) / (342.3 g/mol)

= 0.114 mol

Next, we need to find the volume of the can in liters. We can convert the volume in fluid oz. to liters using the conversion factor 1 fluid oz.

= 0.0295735 L:

= (12.0 fluid oz.) x (0.0295735 L/fluid oz.)

= 0.354882 L

Finally, we can use the formula for molarity (moles of solute / liters of solution) to find the molarity of sucrose in the Coke:

= molarity

= (0.114 mol) / (0.354882 L)

= 0.32 mol/L

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Answer:

P₂N₂I₄

Explanation:

Firstly, we calculate the empirical formula of the compound. To do this we find the moles of each element. Treat the percentages as masses.

The formula for moles is:

[tex]moles = \frac{mass}{relative \: atomic \: mass}[/tex]

The masses of each element are:

Phosphorus = 10.37g

Nitrogen = 4.689g

Iodine = 84.95g

The relative atomic masses of each element are:

Phosphorus = 31.0

Nitrogen = 14.0

Iodine = 126.9

Using these values, we can calculate the moles of each element:

[tex]moles \: of \: phosphorus = \frac{10.37}{31.0} = 0.335[/tex]

[tex]moles \: of \: nitrogen \: = \: \frac{4.689}{14.0} = 0.335[/tex]

[tex]moles \: of \: iodine \: = \: \frac{84.95}{126.9} = 0.669[/tex]

Using the moles, write them in a ratio to find the ratio of moles:

Phosphorus : nitrogen: iodine

0.335 : 0.335: 0.669

The smallest number here is 0.335, so divide each number by 0.335

0.335÷0.335=1

0.335÷0.335=1

0.669÷0.335=1.99... = 2 (round to the nearest whole number)

These numbers are used as the subscripts of each element.

This means that the empirical formula is:

PNI₂

To calculate the molecular formula:

[tex]\frac{molar \: mass \: of \: molecular \: formula}{molar \: mass \: of \: empirical \: formula}[/tex]

The molar mass of empirical formula is adding the molar masses of compound PNI2:

31.0 + 14.0 + 126.9 = 171.9

The molar mass of molecular weight or mass = 298.8 (given from the question)

Substitute these in the formula above:

[tex] \frac{298.8}{171.9} = 1.738...[/tex]

1.738 = 2 rounded to the nearest whole number.

Multiply all the subscripts seen in the empirical formula by the number 2:

PNI₂ × 2 = P₂N₂I₄

Option B, Bonding pair-bonding pair, lone pair-bonding pair, lone pair-lone pair. The electrons in bonding pairs are repulsion held relatively closely together, and are involved in the formation of a chemical bond.

The repulsion between two bonding pairs is relatively weak, as they are attracted to the positively charged nuclei of the atoms they are bonding. The repulsion between a lone pair of electrons and a bonding pair of electrons is generally stronger than that between two bonding pairs because the lone pair is not involved in bonding and tends to be held further away from the nucleus, causing the electron cloud to be larger and thus a stronger repulsion because the two lone pairs are not involved in bonding, and are held relatively far away from the nuclei, causing the electron clouds to be larger and thus a stronger repulsion

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Aspartic acid and phenylalanine are the two amino acids that make up aspartame, along with methanol. When the body processes this third key ingredient, formaldehyde and formic acid are produced.

Materials, Raw Two amino acids, phenylalanine and aspartic acid, as well as methanol, make up aspartame. L-aspartyl-L-phenylalanine methyl ester is its formal chemical name. Proteins are made up of amino acids, which are frequently referred to as the building blocks of proteins. Aspartame has the chemical formula C14H18N2O5. In foods and beverages, aspartame, a synthetic, non-saccharide sweetener that is 200 times sweeter than sucrose, is frequently used as a sugar substitute. The commercial names for it are NutraSweet, Equal, and Canderel.

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2,2-Dimethylbut-1-yne .The alkyne name is formed using the IUPAC nomenclature system.

First, the length of the longest continuous carbon chain (containing the triple bond) must be identified. In this case, it is a four-carbon chain (but-).

Second, the location of the triple bond must be determined. In this case, it is located on the first carbon atom so the prefix 1- is used.

Third, the substituents must be listed in alphabetical order. In this case, there are two methyl groups (2,2-dimethyl).

The final name is 2,2-Dimethylbut-1-yne.

2,2-Dimethylbut-1-yne .The alkyne name is formed using the IUPAC nomenclature system.

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When only 1 mol of oxygen was intended to be produced, a process instead yields 4.93 L of oxygen. The percent yield of the reaction is 493%.

Percent yield is a measure of how much of the desired product is produced in a chemical reaction. It is calculated by comparing the actual yield of a product to the theoretical yield, which is the amount of product that would be produced if the reaction were 100% efficient.

To calculate the percent yield, you can use the formula:

= percent yield

= (actual yield / theoretical yield) x 100%

The theoretical yield of a reaction is calculated by multiplying the number of moles of reactant used by the stoichiometry of the reaction. In this case, the reaction is supposed to produce 1 mol of oxygen, which is the theoretical yield. To calculate the actual yield, we can use the Ideal gas law PV = nRT, where P is the pressure, V is the volume, n is the number of mol. Since we know that V = 4.93 L, we can use this information to find n:

= n

= (PV) / RT

The actual yield is 4.93 L of O2 or 4.93 L of any gas at STP (Standard Temperature and Pressure) is equivalent to 4.93 moles of O2.

Then we can use this information to calculate the percent yield:

= percent yield

= (actual yield / theoretical yield) x 100%

= (4.93 moles O2 / 1 mole O2) x 100%

= 493%

So, the percent yield of the reaction is 493%.

It's important to note that a percent yield of greater than 100% is usually an indication of an error in the measurement or calculation of the actual yield, or it could be an indication that the theoretical yield is incorrect.

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the diagram that best represents the particle-level structure of steel as alloy is option (b).

Alloy, often known as an alloy, is a metallic material made up of two or more elements. Even though carbon, a nonmetal, is a crucial component of steel, the constituents of alloys are typically themselves metals.

Typically, melting the mixture of materials produces alloys. Early civilizations recognized the usefulness of alloys; brass (copper and zinc) and bronze (copper and tin) were particularly significant.

Steel is an alloy of iron and carbon. carbon range is upto 2 percent in the mixture.

In steel iron atoms are larger than carbon.

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The six physical properties associated with hazard recognition of hazardous materials/chemicals are Flammability, Reactivity, Toxicity, Corrosivity, Physical hazards, Health hazards are explained below with details.

1. Flammability: The ability of a material to catch fire and burn easily.

2. Reactivity: The ability of a material to chemically react with other materials, including the potential for explosions or release of toxic gases.

3. Toxicity: The ability of a material to cause harm or death when ingested, inhaled, or absorbed through the skin.

4. Corrosivity: The ability of a material to eat away at or damage other materials, including metals and human tissue.

5. Physical hazards: The potential of a material to cause harm through physical means, such as pressure, impact, or friction.

6. Health hazards: The potential of a material to cause harm to human health, including acute and chronic effects.

These are the six physical properties associated with hazard recognition of hazardous material.

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Given that 1 kWh = 3. 6 MJ and that 1 Btu = 1055 J, It is shown that 1 kWh = 3412 Btu.

1 kilowatt (kWh) = 3.6 mega Joules (MJ)

1 British thermal unit (Btu) = 1055 Joules (J)

As we know that:

1 MJ = 1000000 J

Since

1 kWh = 3.6 x 1000000 J

Calculate for 1 J

1 J = 1 ÷ 1055 Btu

1 kWh = 3.6 x 1000000 x (1 ÷ 1055) Btu

1 kWh  = 3412.32 Btu

So it is calculated that 1 kilowatt (kWh) is equal to 3412 British thermal units (Btu).

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The volume is decreased to 0. 50L, the number of moles of SO₂Cl₂at equilibrium will increase by 1–10% option - a is correct.

The guiding idea of Le Chatelier is as follows: A shift in the position of the equilibrium results from a change in one of the variables that characterize a system in equilibrium and cancels out the effects of that change.

Now to solve this question first we have to know the Le-chatelier's

Principle

The Principal that if a system in chemical equilibrium is subjected to a disturbance it tends to change in a way that opposes this disturbance.

SO₂Cl₂(g) ⇄ SO₂(g) + Cl₂(g)

Initially, there is one molecule at the left hand side of the reaction and two molecules are on the right. But, the Partial pressure of molecules on RHS is lower than LHS. Concentration of RHS molecules is Lower, forward reaction is more favorable.

Decreasing volume would result in increasing the total pressure.

Now, according to Le chatelier's Principle, the equilibrium will shift in such a way to oppose change under compression. Since there are more moles of Products than reactants, to counteract the increased pressure. The equilibrium will shift to LHS increasing the moles

of SO₂Cl₂ but since the concentration (Partial Pressure)

of SO₂Cl₂, it will not increase more than 10%

Hence, answer will be (a) Increase 1-10%.

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The product could have been lost if this experiment was conducted in a physical laboratory: Human Error, Incomplete Reaction, Inadequate Stirring, Impurities and Loss of Product.

Product is a tangible or intangible good that is produced for sale on the market.

1. Human Error: Inaccurate measurements or miscalculations during the experiment may have caused the percent yield not to be 100%.
2. Incomplete Reaction: Depending on the reaction conditions, it is possible that the reaction did not go to completion, leading to a lower percent yield than expected.
3. Inadequate Stirring: If the reactants were not adequately mixed during the experiment, some reactants may not have been able to properly react, resulting in a lower percent yield.
4. Impurities: If the reactants used in the experiment were impure, it could lead to a lower percent yield due to the presence of undesirable substances that can interfere with the reaction or are not involved in the reaction.
5. Loss of Product: If the experiment was conducted in a physical laboratory, it is possible that some of the product was lost during the experiment due to improper handling or other factors.

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D. methane, butane and propane

Propane and butane are both types of alkane hydrocarbons with relatively low boiling points, which allows them to be easily converted to a liquid form at relatively low pressures. This makes them easy to transport and store. Methane, ethane, and hexane are also alkane hydrocarbons, but they are not typically found in large amounts in LPG.

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An absolutely interesting occurrence is light. Despite the fact that it is well recognized that light is an electromagnetic, it is frequently more practical to characterise or characterize light in other ways than only as a wave.

For instance, light is frequently depicted as anything other than a wave in spectroscopy and fundamental physics.

Similar to how we replicate oceans moving through water, the Wave Model illustrates how light propagates. Colors can be explained using the Wave Model by including information about wavelength.

The Light Wave Model. Similar to how we simulate ocean waves moving across water, the Wave Model illustrates how light propagates. We can explain qualities of light by imagining it to be an oscillating wave.

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The amount of hydrogen monochloride that is produced at STP is 152 mL.

The balanced chemical reaction can be depicted as follows:

H₂ + Cl₂ -----> 2 HCl

According to stoichiometry, When one mole of hydrogen reacts with one mole of chlorine, it yields two moles of hydrogen monochloride. Stoichiometry defines the relationship between the quantities of reactants and products before, during, and following chemical reactions

If, 2 g of Hydrogen reacts with 71 g of chlorine to form 73 g of Hydrogen Chloride.

Therefore,  if 10 g reacts with 142 g of chlorine, the HCl produced will be 152 g or 152 ml of HCl.

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9.03 liters of carbon dioxide gas would contain 0.40 moles of carbon dioxide molecules. Since 1 mole of any gas contains 6.02 x 10^23 molecules, the number of molecules of carbon dioxide gas in 9.03 liters of carbon dioxide gas at STP would be 2.41 x 10^23 molecules.

Molecules are the smallest units of matter that can exist by themselves. They are composed of two or more atoms that are held together by chemical bonds. Molecules can be found in the air we breathe, the water we drink, and the food we eat. They can also be found in living organisms, like plants and animals. Molecules can be made of a variety of different atoms, such as oxygen, carbon, nitrogen, and hydrogen.

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The IUPAC name for dimethyl ketone is (C) 2-propanone

The prefix "di-" indicates two methyl groups (CH3) is attached to the parent compound, which is a ketone. The parent compound is also known as propanone.

It is a clear, colorless liquid that is commonly used as a solvent and in the production of various chemicals and materials. It is also known as acetone. It is used as a solvent, as a starting material in the synthesis of other compounds, and as an intermediate in the production of certain polymers.

Utilized to create compounds such as plastic, fiber, medicines, and other substances. Other compounds can also be dissolved with it. It is a byproduct of the breakdown of human fat and is found naturally in plants, trees, volcanic gases, forest fires, and other organisms.

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The total random kinetic energy of all the molecules in one mole of hydrogen at a temperature of 300k is 3741.3 J.

Given temperature (T) = 300K

The number of moles of hydrogen given are (n) = 1

Molecular weight of hydrogen (M) = 1g

Let the kinetic energy = KE

We know that Kinetic Energy (KE) = 1.5nRT where R = Rydbergs constant

So, KE (total) = 1.5nRT,

the total random kinetic energy is KE = (1.5) x (1) x (8.314) x (300) = 3741.3J/mol

The energy of motion is known as kinetic energy, and it can be observed in the motion of objects or subatomic particles. Examples of kinetic energy in action include a person walking, a baseball soaring through the air, a piece of food falling from a table, and a charged particle in an electric field.

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The molar conductivity of KCl at this concentration and  transport numbers and molar ionic conductivity of K+ and Cl– are

Generally, The transport number, t, of an ion can be calculated using the equation: t = (μi x Ci) / Λm,

where

Given that the electric mobility of

K+ is 5.9 x 10^-4 cm^2 V^-1 s^-1, the electric mobility of Cl- is 6.14 x 10^-4 cm^2 V^-1 s^-1, and the concentration of KCl is 0.30 mol L^-1, we can calculate the transport numbers as:

t(K+) = (5.9 x 10^-4 cm^2 V^-1 s^-1 x [K+]) / Λm t(Cl-)

= (6.14 x 10^-4 cm^2 V^-1 s^-1 x [Cl-]) / Λm

where

[K+] and [Cl-] are the molar concentrations of K+ and Cl- ions, respectively.

The molar ionic conductivity, Λi, of an ion can be calculated using the equation: Λi = μi x Ci,

where

Given that the electric mobility of K+ is 5.9 x 10^-4 cm^2 V^-1 s^-1 and the concentration of K+ is 0.15 mol L^-1, the molar ionic conductivity of K+ is:

Λ(K+) = 5.9 x 10^-4 cm^2 V^-1 s^-1 x 0.15 mol L^-1

Λ(K+) =8.85×10−5

Similarly, given that the electric mobility of

Cl- is 6.14 x 10^-4 cm^2 V^-1 s^-1 and the concentration of Cl- is 0.15 mol L^-1, the molar ionic conductivity of Cl- is:

Λ(Cl-) = 6.14 x 10^-4 cm^2 V^-1 s^-1 x 0.15 mol L^-1

Λ(Cl-) =9.21×10^−5

Finally, the molar conductivity of KCl can be calculated as:

Λm = Λ(K+) + Λ(Cl-)

=9.21×10^−5+8.85×10^−5

Λm =1.806×10−4

The transport numbers of K+ and Cl- can be calculated by

t(K+) = Λ(K+) / Λm and

t(Cl-) = Λ(Cl-) / Λm respectively.

t(K+) = 8.85×10−5/1.806×10−4 '

t(K+)=4.90033223×10^−9

and

t(Cl-) =9.21×10^−5/1.806×10−4

t(Cl-) =5.09966777×10^−9

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The process of dissolution of KBr in water occurs because the final solution has a lower energy state than the two components separately.

What do you mean by endothermic?

Endothermic reactions are chemical reactions that absorb energy from their surroundings in order to proceed. This energy is usually in the form of heat and is absorbed from the surroundings in order to drive the reaction forward.

Even though the dissolution process is endothermic, it occurs because the enthalpy of solution is less than the sum of the enthalpies of the two components separately. The enthalpy of solution is the energy required to break the strong ionic bonds between the KBr molecules, allowing them to dissolve into the solution. The energy released from the formation of new hydrogen bonds between the KBr molecules and the water molecules is greater than the energy needed to break the ionic bonds, resulting in a net release of energy. This release of energy causes the overall process to be exothermic, even though the dissolution of KBr into water is endothermic.

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The sample has a volume of 5.3 mL.

Sample in chemistry is the collection of atoms, molecules, or other physical forms of a substance that are used for testing, analysis, or other scientific purposes. Samples are typically collected from a larger population and then studied to understand the larger population. In chemistry, samples can range from tiny amounts of a single chemical compound to large amounts of a mixture of compounds. Sampling is important for understanding chemical properties and reactions, as it helps scientists analyze the behavior of compounds in different situations.  Sampling can also be used to determine factors such as the toxicity, stability, or reactivity of a material.

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Answer: Beta Decay is the kind of radioactive decay that has the net effect of changing a neutron into a proton.

Explanation:

The opposite path, in which a neutron becomes a proton, is also possible. Exactly what happens is that a weak force changes the flavor of the card from top to bottom and vice versa. When this happens, the quark emits a W boson, which quickly decays into either an electron/antineutrino pair or a positron/neutrino pair, depending on the direction of change (neutron decays to protons, electron/antineutrino pairs are created).

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Answer:

Molecule name: N--N-METHYL-N-PROP-2-YNYLAMINE

Formula: C13 H15 N

Molecular weight: 185.265 Da

RMA-3 (Rubidium Microporous Aluminosilicate-3) was hydrothermally synthesized from rubidium–aluminosilicate gels without using any organic or inorganic additives, and its structure determined by XRD Rietveld analysis was confirmed as a novel framework topology containing two 8-membered ring pore-openings with dimensions of 0.49 × 0.37 nm and 0.34 × 0.38 nm

Answer:

Hey there! Just wanted to let you know that the term RMA stands for "relative molecular mass" in chemistry. This is a measure of the size of a molecule, calculated by adding up the atomic weights of all the atoms in the molecule. For example, the relative molecular mass of water (H2O) is 18, because the atomic weight of hydrogen (H) is 1 and the atomic weight of oxygen (O) is 16. The relative molecular mass of a molecule is typically expressed in atomic mass units (amu) and can be useful for characterizing and comparing different substances, and predicting their physical and chemical properties.

Answer

a. Single displacement

b. Decomposition

When classifying chemical reactions, consider how reactants change to form the products.

An equation for a chemical reaction has a left side and a right side. The arrow separates the left and right sides.

Each product or reactant can be one or more elements.

We can use letters* to represent products and reactants in a reaction.

Two reactants become one product.

One reactant becomes two products.

Start with two reactants, a compound and an element. To form the products, the element replaces one of the elements that was in the compound.

Start with two reactants that are compounds. To form the products, an element from each compound replaces each other.

Therefore, equation (a) is a single displacement reaction and equation (b) is a decomposition reaction.

*Each letter represents an element. Two elements make a compound. A letter can also represent a compound if compound stays together during the reaction.

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The triple point of a substance is the temperature and pressure at which all three phases of the substance (solid, liquid, and gas) can coexist in equilibrium.

Point B on the phase diagram is the triple point for Bogusium, represented by the intersection of three lines, which indicates that all three phases can coexist in equilibrium at this point.

1. A triple point of a substance is the temperature and pressure at which all three phases of the substance can coexist in equilibrium.

2. Point B on the phase diagram is the triple point for Bogusium, represented by the intersection of three lines.

3. This indicates that all three phases can coexist in equilibrium at this point.

4. Therefore, the correct statement is that Point B represents the triple point for Bo.

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In the molecule C2H4, valence orbitals of the carbon atoms are assumed to be e) sp^2 hybridized.

The set of orbitals that can energetically accept electrons to create chemical bonds is known as the valence shell. The ns and np orbitals in the outermost electron shell make form the valence shell for main-group elements.

The outside electrons engaged in bonding are called valence electrons. A particular atom can have 0 to 7 valance electrons since valance electrons can only exist in the s and p orbitals. Noble gases are atoms that have no valence electrons and dislike forming bonds.

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The enthalpy of the reaction from the bond energy is +102 kJ/mol. Option C

We have to note that the enthalpy would have to do with the energy that ahs been absorbed or the energy that is released in a reaction. We know that if there is a release of energy then we can say that the reaction is exothermic but if we have a case where the energy has been taken in then we can say that the reaction in that case can be said to be exothermic.

We can see that the enthalpy of the reaction can be calculated on the basis of the bond energy when we write;

Energy of bonds that are broken - Energy of bonds that are formed.

[4(410) + 2(496)] - [2(805) + 2(460)]

(1640 + 992) - (1610 + 920)

2632 - 2530

= +102 kJ/mol

Hence, by calculation of the enthalpy bof the reaction, we can see that the reaction would absorb about 102 kJ of heat per mole of the reactant as shown.

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Iron objects such as storage tanks and underground pipelines can be protected from corrosion by connecting them through a wire to a piece of Mg.

General corrosion happens when the majority or even all atoms on such a metal surface become oxidized, causing the surface to corrode completely. The majority of metals were easily oxidised, which means they frequently lose oxygen electrons (among other elements) in the air either in water. Oxygen joins with the metal to produce an oxide as it becomes reduced (gains electrons).

A refined metal usually transformed naturally by corrosion into a safer stable chemical form, including its oxide, hydroxide, and sulphide. By reacting chemically and/or electrochemically with their surroundings, materials slowly degrade. Additionally, it gradually eliminates the element using chemical processes.

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