What is the definition of physical science?

Answer:  (a) [tex]Pb^{2+}[/tex]

Explanation:

The metal with negative reduction potential will easily lose electrons and thus is oxidized and the one with positive reduction potential will easily gain electrons and thus is reduced.

Where both [tex]E^0[/tex] are standard reduction potentials.

[tex]E^0_{[Pb^{2+}/Pb]}=-0.126V[/tex]

[tex]E^0_{[Cr^{3+}/Cr]}=-0.74V[/tex]

[tex]E^0_{[Fe^{2+}/Fe]}=-0.44V[/tex]

[tex]E^0_{[Sn^{2+}/Sn]}=-0.13V[/tex]

Thus here [tex]Pb^{2+}[/tex] with negative reduction potential and least magnitude has the most tendency to gain electrons and thus can be most easily reduced.

Glucose is the most common disaccharide in our diet is the false statement regarding glucose.

The chemical formula of glucose is written as C₆H₁₂O₆.

Starch and glycogen is the highly branched compound or the polymers, which can be formed from the fundamental monomer unit of glucose. Glucose is also present in the blood of as a blood sugars and used as a source of energy or we can say that fuel for the human body. Glucose is a monosaccharide, it means it will not able to break down in following sub units.

Hence, option (c) is false because glucose is a monosaccharide.

To learn more about glucose, visit the below link:

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The false statement about glucose is (C), that is Glucose is the most common disaccharide in our diet. Glucose is actually a monosaccharide. Common disaccharides include sucrose, lactose, and maltose.

To determine which statement regarding glucose is FALSE, let's analyze the given options:

Electrons exist in specified energy levels surrounding the nucleus.

Answer:

electrons exist in specified energy levels surrounding the nucleus.

trueee hope it helpsss

The given statement is true. Privacy and cleanliness are considered as two priorities for the guest quarters.

Quarters are place where people stay as guest for some duration of time. People consider many priorities while booking hotels or quarters for their stay because as they are going to live in it for some span of time.

The first two priorities include privacy and cleanliness. They look out for both the external as well as internal cleanliness. External cleanliness includes surroundings, laws, etc., whereas the inner cleanliness includes right from the articles present in the room till the toilet of the room. As they are living in another individual living area they obviously demand for some sort of privacy.

Answer:

C. Because people get sick from exposure to high levels of radiation

Explanation:

Final answer:

The process of sp³ hybridization involves the mixing of an s orbital with three p orbitals to form four sp³ hybrid orbitals. This type of hybridization occurs in molecules like methane. On the other hand, sp² hybridization involves the mixing of an s orbital with two p orbitals to form three sp² hybrid orbitals, which occurs in molecules like boron trifluoride and ethene. Lastly, sp hybridization is the mixing of an s orbital with a single p orbital to form two sp hybrid orbitals, which occurs in molecules like beryllium hydride.

Explanation:

sp³ hybridization is a process where an s orbital and three p orbitals mix to form a set of four sp³ hybrid orbitals. These hybrid orbitals are arranged in a tetrahedral geometry, with each lobe of the hybrid orbitals pointing towards one of the corners of the tetrahedron. This type of hybridization occurs in molecules such as methane (CH₄).

sp² hybridization is the mixing of an s orbital and two p orbitals to form a set of three sp² hybrid orbitals. These hybrid orbitals are arranged in a trigonal planar geometry, with each lobe of the hybrid orbital pointing towards one corner of the triangle. This type of hybridization occurs in molecules such as boron trifluoride (BF₃) and ethene (C₂H₄).

sp hybridization is the mixing of an s orbital with a single p orbital to form a set of two sp hybrid orbitals. These hybrid orbitals are oriented linearly, with each lobe of the hybrid orbital pointing in opposite directions. This type of hybridization occurs in molecules such as beryllium hydride (BeH₂).

In the case of ethene (C₂H₄), each carbon atom undergoes sp² hybridization to form three sp² hybrid orbitals. One of these hybrid orbitals forms a bond with the identical hybrid orbital on the other carbon atom, resulting in the formation of a double bond. The remaining two hybrid orbitals form bonds with the 1s orbitals of two hydrogen atoms. The unhybridized 2pz orbitals on each carbon atom form another bond by overlapping sideways with each other.

The concept of orbital hybridization allows atomic orbitals to combine and form hybrid orbitals that have different energy and orientation compared to the constituent orbitals. In the case of carbon, different combinations of s and p orbitals can produce four sp³, three sp², or two sp hybrid orbitals.

An sp³ hybrid orbital can also hold a lone pair of electrons. For example, in ammonia (NH₃), the nitrogen atom is surrounded by three bonding pairs and a lone pair of electrons. The nitrogen atom undergoes sp³ hybridization, with one hybrid orbital occupied by the lone pair.

These are four questons and four answers:

Answers:

Explanation:

Question 1) Cl₂O₇:

a) Net charge of the compound: 0

b) Rule: oxygen works with oxidation state +2, except with peroxides.

d) Rule: balance of charges: ∑ of the charges = net charge

Call X the oxidation number of Cl:

Conclusion: the oxidation number of Cl in Cl₂O₇ is 7⁺.

Question 2) AlCl₄⁻

a) Net charge of the ion: - 1

b) Rule: common oxidation number of Al in compounds: +3

c) Rule: balance of charges: ∑ charges = net charge = - 1

Conclusion: the oxidation number of Cl in AlCl₄⁻ is 1 ⁻.

Question 3) Ba(ClO₂)₂

a) Net charge of the compound: 0

b) Rule: common oxidation number of BA in compounds: +2

c) Rule: common oxidation number of O in compounds (except in peroxides): -2

d) Rule: balance of charges: ∑ charges = net charge = 0

Conclusion: the oxidation number of Cl in Ba(ClO₂)₂  is 3⁺.

Question 4) CIF₄⁺

a) Net charge of the ion: + 1

b) Rule: common oxidation number of F : - 1 (it is the most electronegative)

c) Rule: balance of charges: ∑ charges = net charge = + 1

Conclusion: the oxidation number of Cl in ClF₄⁺ is 5⁺.

Answer:

h. 37.5 cm³

Explanation:

where, P is the pressure of the gas in atm.

V is the volume of the gas in L.

n  is the no. of moles of the gas in mol.

R is the general gas constant,

T is the temperature of the gas in K.

(V₁T₂) = (V₂T₁).  

V₁ = 50.0 cm³, T₁ = -73°C + 273 = 200 K,

V₂ = ??? cm³, ​T₂ = -123°C + 273 = 150 K.

∴ V₂ = (V₁T₂)/(T₁) = (50.0 cm³)(150 K)/(200 K) = 37.5 cm³.

Exothermic Synthesis

Answer:

the answer is Exothermic Synthesis

Answer:

235/92U+10n→144/54Xe+90/38Sr+2/10n

Explanation:

235/92U+10n→144/54Xe+90/38Sr+2/10n

gluons because they so tightly  glue quarks together.

Answer:

all of the above I'm pretty sure

When deciding whom to invite to a party, one should consider the ages, interests, and favorites of guests, the time of the party, and the place the party is to be held, as these factors influence the event's success and shape the relationships among attendees.

When deciding whom to invite to a party, it is essential to consider all of the above: the ages, interests, and favorites of guests; the time of the party; and the place the party is to be held. This comprehensive approach ensures that the party is enjoyable for all attendees and suits their preferences and schedules. Not only do these factors play a crucial role in the immediate success of the event, but they can also impact the long-term relationships and social dynamics among those attending.

Considering the ages of guests is important for various reasons. From the practicality of socializing with children of differing ages, as a four-year-old would have different needs and restrictions compared to a four-month-old, to understanding the societal expectations and roles as host or guest in a setting. Furthermore, the interests of guests inform the activities and conversations that will resonate with the crowd. Additionally, by accommodating individuals' favorites, be it food, music, or decorations, you curate a personalized experience that can strengthen relationships.

The time of the party dictates its atmosphere and can affect the availability of your guests. An evening event may suit adults, while a midday gathering might be better for children. Finally, the place where the party is held influences the mood, comfort, and possible activities. Whether in a public venue or a private home, the setting establishes the tone for the interactions and experiences of those present.

The molarity of the NaOH solution is calculated by determining the moles of KHP, which is 0.002693 mol, and then using the volume of the NaOH solution that reacted with KHP. The molarity comes out to be 0.1068 M.

To determine the molarity of the NaOH solution, we need to know the stoichiometry of the reaction between NaOH and KHP (potassium hydrogen phthalate). The equation for the reaction is:

KHP + NaOH -> KNaP + H2O

Each mole of KHP reacts with one mole of NaOH. First, we determine the moles of KHP:

Molar mass of KHP (C8H5KO4) = 204.22 g/mol

Moles of KHP = mass of KHP / molar mass of KHP

Moles of KHP = 0.550 g / 204.22 g/mol = 0.002693 mol KHP

Since the mole ratio between KHP and NaOH is 1:1, the moles of NaOH will also be 0.002693 mol. We can now determine the molarity (M) of the NaOH solution.

Molarity (M) = moles of solute / liters of solution

Molarity of NaOH = 0.002693 mol / 0.02521 L = 0.1068 M

Therefore, the molarity of the NaOH solution is 0.1068 M.

The molarity of the NaOH solution is [tex]{0.107 \text{ M}[/tex]

To find the molarity of the NaOH solution, follow these steps:

1. Write the balanced chemical equation for the reaction between NaOH and KHP (potassium hydrogen phthalate). The reaction is as follows:

  [tex]\[ \text{NaOH} + \text{KHC}_8\text{H}_4\text{O}_4 \rightarrow \text{KNaC}_8\text{H}_4\text{O}_4 + \text{H}_2\text{O} \][/tex]

2. Calculate the moles of KHP that reacted with the NaOH solution. The molar mass of KHP [tex](KHC$_8$H$_4$O$_4$)[/tex] is 204.22 g/mol. Using the given mass of KHP (0.550 g), we can find the moles of KHP:

  [tex]\[ \text{moles of KHP} = \frac{\text{mass of KHP}}{\text{molar mass of KHP}} = \frac{0.550 \text{ g}}{204.22 \text{ g/mol}} \][/tex]

3. Perform the calculation for the moles of KHP:

  [tex]\[ \text{moles of KHP} = \frac{0.550}{204.22} \approx 0.002693 \text{ mol} \][/tex]

4. Since the reaction between NaOH and KHP occurs in a 1:1 molar ratio, the moles of NaOH that reacted with KHP are equal to the moles of KHP:

 [tex]\[ \text{moles of NaOH} = \text{moles of KHP} = 0.002693 \text{ mol} \][/tex]

5. Calculate the molarity of the NaOH solution. The volume of the NaOH solution used is 25.21 ml, which is equivalent to 0.02521 L (since 1 L = 1000 ml):

 [tex]\[ \text{Molarity of NaOH} = \frac{\text{moles of NaOH}}{\text{volume of NaOH in liters}} = \frac{0.002693 \text{ mol}}{0.02521 \text{ L}} \][/tex]

6. Perform the calculation for the molarity of NaOH:

  [tex]\[ \text{Molarity of NaOH} = \frac{0.002693}{0.02521} \approx 0.1068 \text{ M} \][/tex]

7. To express the molarity with the correct number of significant figures, consider the given data. The volume of NaOH has four significant figures (25.21 ml), and the mass of KHP has three significant figures (0.550 g). Therefore, the molarity should be expressed with three significant figures:

  [tex]\[ \text{Molarity of NaOH} = 0.107 \text{ M} \][/tex]

Final answer:

The nuclear equation for the synthesis of rutherfordium-257 by bombarding californium-249 with carbon-12 is 24998Cf + 126C → 257104Rf + 410n. It shows the reactants, products, and the conservation of mass and atomic numbers in the reaction.

Explanation:

The student is asking for a nuclear equation for the synthesis of rutherfordium-257, which is created by bombarding californium-249 (Cf-249) with carbon-12 (C-12). The balanced nuclear equation takes into account the conservation of mass and atomic numbers. The californium-249, which has an atomic number of 98 and a mass number of 249, reacts with carbon-12, which has an atomic number of 6 and a mass number of 12.

The equation is:

24998Cf + 126C → 257104Rf + 410n

In this reaction, rutherfordium-257 has an atomic number of 104 and a mass number of 257. To conserve the mass number and atomic numbers on both sides of the equation, we need to add four free neutrons (n) with a mass number of 1 and an atomic number of 0 to the products side. This completes the balanced nuclear equation for the formation of rutherfordium-257.

Answer:

SEDIMENTARY ROCK

Explanation:

Answer:

Fluorine; f2 + 2e– → 2f–e0 = +2.87 v

Explanation:

Answer:

[tex]\boxed{\text{c) Mg}}[/tex]

Explanation:

Think of it this way.

The Mg half-reaction has the most negative potential, so it has the least tendency to go to the right.

For the same reason, it has the greatest tendency to go to the left.

The oxidation half-reaction would be

Mg ⟶ Mg²⁺ + 2e⁻    E° = 2.37 V

[tex]\text{The most readily oxidized species is \boxed{\textbf{Mg}}}[/tex]

Answer:

[tex]\boxed{\text{(a) 0.00 V; (b) 0.424 V}}[/tex]

Explanation:

We must look up the standard reduction potentials for the half-reactions.

                                                                    ℰ°    

Cr₂O₇²⁻ + 14H⁺ + 6e⁻ ⇌ 2Cr³⁺ + 7H₂O     1.36

Cl₂ + 2e⁻ ⇌ 2Cl⁻                                       1.35827

2IO₃⁻ + 12H⁺ + 10e⁻ ⇌ I₂ + 6H₂O             1.195

Fe³⁺ + e⁻ ⇌ Fe²⁺                                      0.771

(a) Cr³⁺/Cl₂

We reverse the sign of ℰ° for the oxidation half-reaction. Then we add the two half-reactions and their ℰ° values.

                                                                                  ℰ°/V    

2Cr³⁺ + 7H₂O ⇌ Cr₂O₇²⁻ + 14H⁺ + 6e⁻                  -1.36

Cl₂ + 2e⁻ ⇌ 2Cl⁻                                                     1.358 27

2Cr³⁺ + 3Cl₂ + 7H₂O ⇌ Cr₂O₇²⁻  + 6Cl⁻ + 14H⁺     0.00

(b) Fe²⁺/IO₃⁻

                                                                            ℰ°/V

Fe²⁺ ⇌ Fe³⁺ + e⁻                                                -0.771

2IO₃⁻ + 12H⁺ + 10e⁻ ⇌ I₂ + 6H₂O                      1.195

10Fe²⁺ + 2IO₃⁻ + 12H⁺ ⇌ 10Fe³⁺ + I₂ + 6H₂O     0.424

The ℰ° values for the cells are [tex]\boxed{\textbf{(a) 0.00 V; (b) 0.424 V}}[/tex]

Answer:

Answer:

\boxed{\text{(a) 0.00 V; (b) 0.424 V}}

Explanation:

We must look up the standard reduction potentials for the half-reactions.

                                                                   ℰ°    

Cr₂O₇²⁻ + 14H⁺ + 6e⁻ ⇌ 2Cr³⁺ + 7H₂O     1.36

Cl₂ + 2e⁻ ⇌ 2Cl⁻                                       1.35827

2IO₃⁻ + 12H⁺ + 10e⁻ ⇌ I₂ + 6H₂O             1.195

Fe³⁺ + e⁻ ⇌ Fe²⁺                                      0.771

(a) Cr³⁺/Cl₂

We reverse the sign of ℰ° for the oxidation half-reaction. Then we add the two half-reactions and their ℰ° values.

                                                                                 ℰ°/V    

2Cr³⁺ + 7H₂O ⇌ Cr₂O₇²⁻ + 14H⁺ + 6e⁻                  -1.36

Cl₂ + 2e⁻ ⇌ 2Cl⁻                                                     1.358 27

2Cr³⁺ + 3Cl₂ + 7H₂O ⇌ Cr₂O₇²⁻  + 6Cl⁻ + 14H⁺     0.00

(b) Fe²⁺/IO₃⁻

                                                                           ℰ°/V

Fe²⁺ ⇌ Fe³⁺ + e⁻                                                -0.771

2IO₃⁻ + 12H⁺ + 10e⁻ ⇌ I₂ + 6H₂O                      1.195

10Fe²⁺ + 2IO₃⁻ + 12H⁺ ⇌ 10Fe³⁺ + I₂ + 6H₂O     0.424

The ℰ° values for the cells are \boxed{\textbf{(a) 0.00 V; (b) 0.424 V}}

Explanation:

its right trust

To curb the increase in Earth's temperature due to greenhouse gases, we need to reach 'net zero' carbon emissions by 2050 or sooner. The problem arises largely from burning fossil fuels and deforestation, leading to increased CO2 in the atmosphere. Continued trajectory could double Earth's CO2 levels from pre-industrial times by the end of the century.

To avoid a large increase in temperature due to greenhouse gas emissions, it is crucial that these emissions peak as soon as possible. According to the Union of Concerned Scientists, we should aim for 'net zero' carbon emissions by 2050 or even sooner. This would mean that no more carbon enters the atmosphere than is removed.

Greenhouse gases, primarily carbon dioxide, are largely a result of burning fossil fuels, such as coal and oil. Alongside this, the destruction of tropical forests which absorb CO2 from the atmosphere exacerbates the problem.

If this trajectory continues, Earth's CO2 levels are predicted to double from pre-industrial levels by the end of this century, leading to potentially catastrophic climactic changes. Hence, mitigation strategies to stabilize carbon emissions constitute a major part of our global strategy towards climate change.

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Answer- The correct answer is ammonia.

Explanation- All other compounds that are formed do not have any essence of Nitrogen in it. Whereas, Methane is a compound  with carbon and hydrogen as elements while water has hydrogen and oxygen as its elements.

Lastly Hydrogen and chlorine combined together to form hydrochloric acid. Hence the only compound left with nitrogen is ammonia and has nitrogen and hydrogen as its basic elements.

Answer:

The answer is C. Ammonia

Explanation: I got it right on the test.

Have a good day :)

Answer: Oxygen

Explanation:

Answer: The substance which gets reduced in the hydrogen-oxygen fuel cell is oxygen.

Explanation:

A reduced substance undergoes reduction reaction. This is defined as the reaction in which an atom gains electrons.

A fuel cell is defined as the electrochemical cell which converts the chemical energy of a fuel (often used hydrogen) and an oxidizing agent (often used oxygen) into electrical energy via a pair of redox reactions.

The reactions which occur in hydrogen-oxygen fuel cell are:

At cathode:  [tex]H_2+2OH^-\rightarrow 2H_2O+2e^-[/tex]

At anode:  [tex]\frac{1}{2}O_2+H_2O+2e^-\rightarrow 2OH^-[/tex]

As, the oxygen is gaining electrons from the above reaction. Thus, it is undergoing reduction reaction and is getting reduced.

Hence, the substance which gets reduced in the hydrogen-oxygen fuel cell is oxygen.

Withholding personal judgment against people with mental illness is important to understand their troubles objectively and provide support.

The main importance of withholding personal judgment against people with mental illness is that it allows us to attempt to objectively understand a person's troubles. When we withhold personal judgment, we can empathize with individuals suffering from mental illness and provide them with the support and care they need. Additionally, by not judging, we create an environment that encourages open communication and reduces the stigma surrounding mental health.

Answer:dispersed state

dispersed medium

colloid

Answer:

Label A points to the solid particles of pigment that give the paint its color. The solid particles are the (dispersed state.)

Label B represents the liquid surrounding the solid particles. This liquid is called the (Dispersed Medium)

This paint does not settle over time, so it is an example of a (Colloid)

Explanation:

Fernanda looked at a sample of paint under a microscope. At right is the sketch she made of what she saw.

Answer:

A. Add a coefficient 4 before h2o and add a 2 before so2

Explanation:

Answer : The correct option is, Add a coefficient 2 before [tex]H_2O[/tex] and a 2 before [tex]SO_2[/tex].

Explanation :

Balanced chemical reaction : It is defined as the reaction in which the number of atoms of individual elements present on reactant side must be equal to the product side.

If the amount of atoms of each type on the left and right sides of a reaction differs then to balance the equation by adding coefficient in the front of the elements or molecule or compound in the chemical equation.

The coefficient tell us about that how many molecules or atoms present in the chemical equation.

The given chemical reaction is,

[tex]2H_2S+3O_2\rightarrow H_2O+SO_2[/tex]

This reaction is an unbalanced chemical reaction because in this reaction number of hydrogen, sulfur and oxygen atoms are not balanced.

In order to balance the chemical equation, the coefficient '2' is put before the [tex]H_2O[/tex] and [tex]SO_2[/tex] and we get the balanced chemical equation.

The balanced chemical reaction will be,

[tex]2H_2S+3O_2\rightarrow 2H_2O+2SO_2[/tex]

Answer:

4.32e+26

Explanation:

Answer:

4.32e+26

Explanation:

Answer:

Explanation:

A redox reaction is a reaction in which there is an exchange of electrons between different species. As one specie gains electrons the other loses it and this furnishes the reaction.

Redox reactions are made up of half-reactions which shows how a specie gains electrons and what happens to it. It also shows what happens to a specie that loses electrons.

To understand and be able to identify what an oxidation and reduction half reaction is, we need to know what oxidation and reduction entails.

Oxidation is the loss of electron by an atom. It also entails addition of oxygen to a specie, removal of hydrogen from a specie. This leads to increase in oxidation number of the specie.

Reduction is just the opposite of oxidation and electrons are gained by an atom here.

To identify an oxidation or reduction half in a redox reaction, we look at the species closely and we check for the following:

1. Changes in oxidation number

2. Wether a species loses or gains electrons.

3. Addition /removal of oxygen and hydrogen.

Let's take for example:

Fe²⁺ + MnO₄⁻ → Fe³⁺ + Mn²⁺

By inspection, we look at the species involved:

Fe: Fe²⁺ → Fe³⁺

The oxidation number increases from 2+ to 3+

There is a loss of an electron for this to occur

We see that this is an oxidation half

Mn: MnO₄⁻ → Mn²⁺

The oxidation number of Mn changes from +7 to +2:

X+ (-2x4) = - 1

X - 8 = - 1

X = 7

This implies that 5 electrons were gained.

There is also a loss of oxygen.

This makes the reaction a reduction half.

This simple way is used to identify reduction and oxidation halves.

To identify oxidation and reduction half-reactions in a redox equation, remember that oxidation involves the loss of electrons and reduction involves the gain of electrons. Balance the reaction by ensuring electrons lost equal electrons gained. Iron and hydrogen serve as examples of a reducing agent and an oxidizing agent, respectively.

To identify oxidation and reduction half-reactions in a redox equation, it's essential to understand the basic principle that oxidation involves the loss of electrons, while reduction involves the gain of electrons.

An oxidation half-reaction will show electrons as products (on the right side), indicating that the species is losing electrons. Conversely, a reduction half-reaction will have electrons as reactants (on the left side), signifying the gain of electrons by the species.

Example of Identifying Half-Reactions

Consider a redox process where Iron (Fe) is oxidized, and Hydrogen (H₂) is reduced. The oxidation half-reaction can be represented as Fe -> Fe²⁺ + 2e⁻, showing iron losing two electrons. For the reduction process, H⁺ + e⁻ -> H₂ illustrates hydrogen gaining electrons.

To ensure the reaction is balanced, the number of electrons lost in the oxidation process must be equal to those gained in the reduction process. This might require multiplying one or both half-reactions by a certain number to balance the electrons.

In the overall reaction, the species that gets oxidized (loses electrons) acts as the reducing agent, and the species that gets reduced (gains electrons) acts as the oxidizing agent. Therefore, in our example, iron acts as the reducing agent, and hydrogen acts as the oxidizing agent.

Answer:

By using a screen

Answer:

Use a screen

Explanation:

Answer:

[H⁺] = 1.0 x 10⁻¹² M.

Explanation:

∵ [H⁺][OH⁻] = 10⁻¹⁴.

[OH⁻] = 1 x 10⁻² mol/L.

∴ [H⁺] =  10⁻¹⁴/[OH⁻] = (10⁻¹⁴)/(1 x 10⁻² mol/L) = 1.0 x 10⁻¹² M.

∵ pH = - log[H⁺] = - log(1.0 x 10⁻¹² M) = 12.0.

∴ The solution is basic, since pH id higher than 7 and also the  [OH⁻] > [H⁺].

Answer:

Explanation:

Oxidation-reduction reaction is the simulaneous oxidation and reduction of the substances and is represented by two half-reactions.

The oxidation half-reaction is the loss of electrons, with the consequent increase in the oxidation state by the oxidized substance.

In this case, the process that shows the loss of electrons is:

That reaction shows:

On the other hand, the reduction half-reaction is the gain of electrons, with the consequent reduction of the oxidation state by the reduced substance.

In this case, the process that shows the gain of electrons is:

That reaction shows:

Summary:

chlorine by twenty øne piløts