Two systems with identical Rate Laws but dissimilar initial concentrations are incompatible.
What is Rate Law?
A rate law demonstrates how the concentration of the reactant affects the rate of a chemical reaction. The rate law typically takes the form rate = k[A]n for a reaction like aA products, where k is the proportionality constant referred to as the rate constant and n is the order of a reaction with respect to A. The amount of n must be determined experimentally because it is unrelated to the reaction stoichiometry.
Rate Law= K × Cvc × Coh
Vc+OH
We use the abbreviation Vc for Voilet crystals.
Here, limiting reactant is (Vc) which is the violet crystals.
Cvc = initial Cvc × (1 - x)
Coh = initial Cvc × (1 - x)
Using these values in the 1st equation
Rate Law = K × Cvc × Coh
we get,
Rate Law = K × (Cvc 1)² × (1-x)²
This new equation demonstrates that the rate law depends on the initial concentration of the reagents.
As a result, we can state that the rate law is not the same when the values of two systems differ.
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How many particles are in one mole?
О А.
OB. 2.066 x 1023
O C.
6.022 x 1023
O D.
6.023 × 1022
1022
3.026 x
Answer:
I think it's C. 6.022 * 1023
what is the standard reductiion potential e
The standard reduction potential of a species is the tendency of that species to get reduced. It measures the reduction tendency of a chemical species.
What is reduction?
Reduction in a chemical reaction is the increase in the number of electrons of the atoms or group of atoms involved. The reaction which loses oxygen or gains hydrogen can also be termed as reduction.
Standard reduction potential measures the tendency of a chemical species to get reduced. It can be calculated by subtracting the standard reduction potential at anode from the standard reduction potential at the cathode.
Therefore, standard reduction potential of a given species is the tendency of that species to undergo reduction in a redox reaction.
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liquid octane will react with gaseous oxygen to produce gaseous carbon dioxide and gaseous water . suppose 9.1 g of octane is mixed with 41.9 g of oxygen. calculate the minimum mass of octane that could be left over by the chemical reaction. be sure your answer has the correct number of significant digits.
The minimum mass of octane that could be left is 2.8gm.
When octane reacts is burned in the air, it chemically reacts with oxygen gas to produce carbon dioxide and water.
C8H18 + 5O2 = 8CO2 + 9H20
Octane is a hydrocarbon and alkane with the chemical formula C8H18, and the condensed structural formula is CH3(CH2)6 CH3. Octane has many structural isomers that differ by the amount and location of branching in the carbon chain. One of these isomers 2,2,4 trimethylpentane commonly called iso octane is used as one of the standard values in the octane rating scale.
Octane is a component of Gasoline (petrol). As with all low molecular weight hydrocarbons octane is volatile and very flammable.
Octane is colloquially used as a short form of octane rating, particularly in the expression high octane. The octane rating was originally determined by mixing fuels from only normal heptane and iso octane.
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Which of the following BEST accounts for the charge in potential energy going from Point B to Point A?As the atoms get closer together, their nuclei begin to repel one another,As the atoms get closer together, the attraction of the nucleus of each atom for the electron(s) of the other gets stronger and stronger,As the molecules get closer, they slow down, converting kinetic to potential energy,The bond is becoming stronger as the atoms approach each other.
The statement which accounts for the change in potential energy going from Point B to Point A is that as the atoms get closer together, the attraction of the nucleus of each atom for the electron(s) of the other gets stronger and stronger and is denoted as option B.
What is Potential energy?This is referred to as the energy possessed by a body by virtue of its position.
The change in the potential energy is as a result of the atoms getting closer which leads to the attraction of the nucleus of the electron of the other getting stronger.
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Never mind I don't need help, don't know how to take this down though
Answer:
................................ ..............
what volume (in ml) of 0.500 m naoh is required to neutralize 2.32 g of hno3? enter the number only, not units
NaOH is a mono base, whereas HCl is a mono acid. Therefore, 1 mole of NaOH is required to neutralize 1 mole of HCl.
Here, we will determine how much H 2 S O 4 is necessary to neutralize 60.2 mL of a 0.427 M KOH solution. As a result, 0.01285 moles of H 2 S O 4 are required to neutralize the KOH in the provided quantity. The number of moles per litre is the molarity of a solution. In 500 ml, you have 0.75 moles. As a result, you have 0.75 moles per liter, or 1.5 moles per liter, or one pound. vwX30 = 0.015 mol 1000 in 30 mL of 0.5 M H2SO4 500 mL is equal to 0.500 L of diluted solution because 30 mL of 0.5 M.
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COOKING CLASS!
Copy and paste three recipes you would use for the Thanksgiving Holidays. Double and a half each recipe creating a new recipe, thereby changing the yield for each recipe. You will end up with nine recipes, giving you three of each recipe with different quantities and different yields.
A recipe's total yield is determined by multiplying the number of servings by the size of each serving. Multiply the new number of servings by the new size of each serving to determine the desired yield for the recipe.
Divide the desired yield by the original yield to obtain the conversion factor and multiply each component by the conversion factor. A standardized recipe is one that has been tried, tested, evaluated, and adjusted for use in school lunches. Consistent quality and yields are obtained every time the correct processes, equipment, and raw materials are used.
Recipes may be copyrighted if they involve substantial literary expression. This phrase may be a description or detailed instructions. This is why food and recipe bloggers often share stories and personal anecdotes alongside their recipe ingredients. Food is one of the most difficult things to trademark or copyright. Trademarks can be protected or copyrighted, but their content cannot be protected.
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The ability of a covalently bonded atom to attract the shared electrons is called?.
Electronegativity is the ability of a covalently bonded atom to attract shared electrons.
Electronegativity was introduced by Linus Pauling in 1932 and over the years, different scientists, such as Robert S. Mulliken, have proposed their own scales of electronegativity for the elements as well.
Electronegativity varies across the periodic table in a predictable manner (it follows a pattern). It increases from left to right across periods, and increases from bottom to top in groups. Fluorine is the most electronegative element and Francium is the most least electronegative one. When atoms are joined together and they have an electronegativity difference of fewer than two units, the bond formed is a covalent bond, in which the electrons are shared by both atoms.
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Hydrobromic acid and lithium hydroxide are mixed in solution. Indicate the net ionic equation. Is k>1, <1 or ~1?.
The net ionic equation is OH⁻(aq) + H⁺(aq) H₂O(l) and k ~1.
What is an ionic equation?A molecular equation is an equation in which the formula of a compound is written as if all substances exist as molecules. An ionic equation is an equation in which dissolved ionic compounds are represented as free ions.
Consider the molecular equation that occurs when an aqueous solution of lithium hydroxide and hydrobromic acid undergo a neutralization reaction.
LiOH(aq) + HBr(aq) ⇒ LiBr(aq) + H₂O(l)
The complete ionic equation includes all ions and species.
Li⁺(aq) + OH⁻(aq) + H⁺(aq) + Br⁻(aq) ⇒ Li⁺(aq) + Br⁻(aq) + H2O(l)
Only ions in the net ion equation It is included. Participate in reactions and molecular species.
OH⁻(aq) + H⁺(aq) H₂O(l)
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8. There are 75 Btu. If you need to convert the Btu to Joules, what number would you use to multiple the Btu by?
A.1.055
B.100,055
C.10,055
D.1,055
PLEASE HELP ME
A sealed tube containing the equilibrium mixture is placed in ice-cold water. There is an increase in the
amount of yellow solid in the equilibrium mixture. What can you deduce about the forward reaction
in this equilibrium?
Explain your deduction.
ICI(1) + CL(g) ICI,(s)
ICI(1) + CL(g) ICI,(s) is an endothermic reaction.
What is the classification of chemical reaction?Any transition from a more ordered to a less ordered state (solid to liquid, liquid to gas, or solid to gas),in which r energy, is used referred to as an endothermic reaction. Likewise, any transition from a less ordered to a more ordered state (liquid to solid, gas to liquid, or gas to solid), which releases energy, is referred to as an exothermic reaction
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which region of a titration could you use the henderson-hasselbalch equation to determine the ph? group of answer choices
Region B of the titration curve can be used to determine the pH
Henderson-hasselbalch equation is mostly used for buffer solutions. Buffer solutions are the solutions of weak acids and their salts, for example, the mixture of acetic acid and sodium acetate will act as a buffer solution. The major role of buffer solution is to resist the change in pH.
So it is clear that buffer solutions have an acid and a conjugate base, so region B can represent the pH. Region A of the titration curve represents the acid solution, region C represents the endpoint. While the other two regions are out of the system.
Complete question: (Graph is attached as a picture)
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Leandra is learning about chemical reactions and she wants to examine the information that is included in a chemical equation. Which pieces of information does a chemical equation include? choose the three that apply.
The correct answers are (A).The type of atoms that form during a reaction. (C). the kind of substances that go into a molecule. (D). if the molecules are reactants or products.
What is chemical equation?A chemical equation can offer information about the types of atoms that are produced during a reaction, the types of elements that make up molecules, and the types of molecules that are reactants or products.
We can therefore draw the conclusion that chemical equation provides us with useful and significant information about elements. Chemical equation also informs us about the number of atoms involved in the chemical reaction as well as the quantity or concentration of products produced at the end of the chemical reaction.
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Complete question is "Leandra is learning about chemical reactions and she wants to examine the information that is included in a chemical equation. Which pieces of information does a chemical equation include? Choose the three that apply. A. the kinds of atoms that form during a reaction B. the kinds of molecules involved in the reaction C. the kinds of elements that make up a molecule D. whether the molecules are products or reactants E. whether the products have more mass than the reactants".
Why is electron filling similar to going up the stairs?.
If we look into the Bohr's atomic model, it is like a staircase.
Where every next orbit is like a stair.
As we can not rest in air, we either have to stay on level 1 or can go up with enough energy to climb next level.
Same way, electron can either stay on one orbit or can go to higher orbits with enough energy to jump from lower energy level to the higher energy level, can say orbit.
According to Bohr, atom is a system consisting of a dense nucleus surrounded by orbiting electrons.
He compared his atomic structure with the structure of the Solar System.
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how many grams of carbon dioxide can be produced by burning 6.50 moles of propane? assume that oxygen is the excess reactant in this reaction. round your answer to 3 significant digits.
858.185 grams of Carbon Dioxide can be produced when 6.50 moles of Propane is burned.
What is Propane?
Propane is a three-carbon alkane and has the molecular formula C3H8. In addition to low-emission public transportation, propane is also used as fuel in home and industrial applications.
When 1 mole of Propane undergoes combustion in presence of oxygen, 3 moles of Carbon Dioxide is produced.
Using this, we can calculate that
6.50 moles of propane x 3 gives us 19.50 moles of Carbon Dioxide.
Converting moles to grams, we get 1 mole of CO2 is 44.009 grams.
Therefore, 19.50 x 44.009 = 858.185 grams of CO2.
Hence, we can say that 858.185 grams of CO2 is produced when 6.5 moles of propane is burned.
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Burning 6.50 moles of propane can result in the production of 858.185 grammes of carbon dioxide.
What is Propane?
The chemical formula for propane is C3H8, a three-carbon alkane. In addition to being a fuel for low-emission public transportation, propane is also employed in domestic and commercial settings. Three moles of carbon dioxide are created when one mole of propane is burned in the presence of oxygen.
With this, we can determine that
We get 19.50 moles of carbon dioxide when we multiply 6.50 moles of propane by 3.
1 mole of CO2 is equal to 44.009 grammes when converted to grammes.
As a result, 19.50 times 44.009 equals 858.185 grammes of CO2.
Thus, we can state that the combustion of 6.5 moles of propane results in the production of 858.185 grammes of CO2.
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Which is generally stronger, intermolecular interactions or intramolecular interactions?.
Intramolecular interactions are generally stronger.
Intermolecular interactions are one or two orders of magnitude weaker than intramolecular interactions, which are real bonds in which electrons are obtained, lost, or shared.
Chemical bonds including ionic, covalent, and metallic bonds are instances of intramolecular forces. The chemical bonds that hold the atoms in molecules together are known as intramolecular forces. The metallic bond, the ionic bond, and the covalent bond are the three main categories of chemical bonding.
Intramolecular bonds can be classified as covalent, ionic, or metallic. A covalent bond is one in which two atoms share a pair or pair of electrons. Covalently bound species with low molecular masses are referred to as molecules in compounds.
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explain why it is the freezing point depression of a solvent does depend on the concentration of the solute.
The reason why the freezing point depression of a solvent depends on the concentration, it is because the solute occupies space between the solvent molecules.
The freezing point depression of a solvent depends on the concentration of the soluteThe freezing point depression of a solvent does depend on the concentration of the solute because the solute occupies space between the solvent molecules, thus reducing the number of molecules that can interact.
When a solute is dissolved in a solvent, it takes up space between the solvent molecules. This reduces the number of molecules that can interact, and thus lowers the freezing point of the solvent. The more concentrated the solution, the greater the effect on the freezing point.
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the density of a 20.0% by mass ethylene glycol (c2h6o2) solution in water is 1.03 g/ml. find the molarity of the solution.
The density of a 20.0% by mass ethylene glycol ([tex]C_{2} H_{6} O_{2}[/tex]) solution in water is 1.03 g/ml. the molarity of the solution is 16.58 M
Describe density.A substance's density is defined as its mass per unit volume.
[tex]D=\frac{m}{v}[/tex]
where,
D=density
m= mass
v= volume
MolarityMole concentration per liter of solution is known as molarity.
Let us find the molarity of a solutionLet's assume that the solution weighs 100 grams. Ethylene glycol's mass would thus be 20.0 grams.
Ethylene glycol has a molar mass of 62.07 grams per mol.
mole = [tex]\frac{given mass }{ molar mass}[/tex]
= [tex]\frac{20.0}{62.07}[/tex] =0.322 g
We determine the volume of the solution and convert it to liters using the formulas:
D= m/ v
v= m/D
v= [tex]\frac{20.0}{1.03}[/tex] = 19.41 mL
Molarity =[tex]\frac{no. of moles }{volume ( L)}[/tex]
= [tex]\frac{0.322}{19.41} * 1000[/tex]
=16.58 M
so, the molarity of the solution is 16.58 M
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I need help what is the answer
Neon is a Noble Gas (Group 18), so it would have 8 valence electrons. The valence electrons determine its recativity, so you will need to find the model with around 8 valence e-.
Model W and model Y
the activity of an isotope of erbium of falls from 500, b, q,500bq to 125, b, q,125bq in just 20, h, o, u, r, s,20hours. what is its half-life?
The half-life = 10hrs.
Solution:
We know, activity after 'n' half-lives R=RO (1/2)n
125= 500 (1/2) n
= (1/2)n = (125/500) = 1/4 = (1/2)
n = 2
now,
nty2 = 20 hrs
2ty₂ = 20 hrs
ty₂ = 10 hrs
∴ half-life = 10 hrs
Half-life is the time it takes a given amount of a radioactive element to decay to half its original value. This also means that half-life is the time it takes for the activity of a source to decay to half its original value. Become. Isotope half-life is used to describe the rate at which the isotope decays and emits radiation. Half-life can be used to predict the amount of radioactive material remaining after a certain period of time.
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SOMEONE HELP ME WITH THIS PLEASE I'LL MARK AS BRAINLIEST
Our electronegativity calculator is here to assist you with your chemistry questions about atom bonds. It calculates the type of bond based on the electronegativity values of the elements.
How to calculates electronegativity values of the elements ?Electronegativity is a measure that differs between atoms and influences their chemical properties as well as the type of bond formed.
Using the electronegativity calculator, you can determine the type of bond formed between different elements based on their electronegativity values.
You can also use our tool as an electronegativity difference calculator to calculate the difference between two elements' electronegativity values. Follow the steps below to determine the type of bond between elements based on electronegativity:
Choose the first element's electronegativity value.Choose the second element's electronegativity value.The calculator computes the difference between these two electronegativities before displaying the type of bond formed by these two elements. This feature is known as the ionic or covalent calculator.To learn more about electronegativity values of the elements refer to:https://brainly.ph/question/11980884
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determine the limiting reactant when 2.0 moles of fe and 6.0 moles of o2 are added to the chemical reactor.
When 2.0 moles of Fe and 6.0 moles of O₂ are added in a chemical reactor, the limiting reactant between Fe and O₂ is Fe.
Limiting reactant is defined as the reactant which is present in less quantity than the required. It limits or restricts the yield of a reaction before other reactants are completely used in a reaction. The other reactant is known as excess reactant.
The balanced reaction between Fe and O₂ is given as
4Fe+3O₂→2Fe₂O₃
To find out limiting reactant, we need to find out moles of Fe₂O₃ using moles of Fe and O₂. The mol to mol ratio between Fe and Fe₂O₃ is 4:2 or 2:1. Hence, moles of Fe₂O₃ formed is
2.0 mol Fe×(1 mol Fe₂O₃/2 mol Fe)
=1 mol Fe₂O₃
The mol to mol ratio between O₂ and Fe₂O₃ is 3:2. Hence, moles of Fe₂O₃ formed is
6.0 mol O₂×(2 mol Fe₂O₃/3 mol O₂)
=(6.0×2 mol Fe₂O₃/3)
=12.0 mol Fe₂O₃/3
=4.0 mol Fe₂O₃
Since Fe forms the less moles of Fe₂O₃. Hence, the limiting reactant is Fe.
Therefore, when 2.0 moles of Fe and 6.0 moles of O₂ are added in a chemical reactor, the limiting reactant between Fe and O₂ is Fe.
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4. You have Four olution A,B,C,D. A- Milk in water B- Baking powder in water C- Vinegar in water D- Glucoe in water. What colour change would you expect when you dip a red litmu into each of thee tet tube\
According to the given condition the color will change to blue if you dip red litmus paper in second solution ie. Baking powder in water.
What does red litmus paper indicate?Using litmus paper, which turns red for acidic materials and blue for alkaline or basic materials, the substance is determined. When the pH is between 4.5 and 8.3, litmus paper turns red and turns blue. The pH level is near to neutral if the paper becomes purple.A combination of several colours taken from lichens and made water-soluble is known as litmus. One of the earliest kinds of pH indicators, used to assess the acidity of materials, is frequently produced by its absorption onto filter paper.Additionally, water-soluble gases that influence acidity or basicity can be detected using wet litmus paper; the gas dissolves in the water and the resulting solution colours the litmus paper. For instance, alkaline ammonia gas causes red litmus paper to turn blue. While all pH paper functions as litmus paper, the reverse is not true.To learn more about litmus paper refer :
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q17 (1pts) write a lewis structure for so3 that expands the octet to minimize formal charge and if necessary places negative formal charges on the most electronegative atom(s).
Having the chemical formula SO3, sulphur trioxide is a substance. Due to its reaction with the airborne water to form sulfuric acid, this substance is very significant and extensively studied.
Acid rain is what happens when this sulfuric acid, which is a gas, mixes with rain and falls to the ground. Sulphur trioxide is typically colourless and lubricious yet has a strong corrosive tendency. Additionally chemical formula known as battery acid, it is employed in the production of acids, fertilizers, lead-acid batteries, the pickling of metal, the purifying of petroleum, and other processes. The Lewis structure of sulphur trioxide , also known as an electron dot structure, establishes the quantity of valence electrons in an atom. chemical formula , they explain the role that these valence electrons play in the process.
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Which of these pairs of elements is most likely to be part of a polyatomic ion?
I and I?
S and O?
or K and F.
The pairs of elements that is most likely to be part of a polyatomic ion is option B: S and O.
What is polyatomic ion?An ion made up of two or more atoms that really combine covalently is referred to as a polyatomic ion. This implies that only non-metals can link covalently with one another since a covalent bond is created when electrons are shared.
S and O atoms, for instance, have a covalent bond and frequently combine to produce polyatomic ions. K and F, Li and I, Mg and Br, on the other hand, are both metals and non-metals. Therefore, because the metal will donate its valence electrons to the non-metal, they will always establish an ionic bond.
As a result, we can draw the conclusion that, among the possibilities provided, S and O pairs of elements are most likely to make up a polyatomic ion.
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what term describes a catalytic converter as it reaches its effective temperature? group of answer choices light off trigger combustion absorption
Light off describes a catalytic converter as it reaches its effective temperature.
The lowest temperature required to start a catalytic reaction is known as the catalyst light-off. The aforementioned definition is not very precise because of the reaction rate's steady growth. The temperature at which conversion reaches 50% is referred to as the light-off temperature.
Between 400 and 600F is the usual light-off temperature at which a catalytic converter begins to function. The usual operating temperature is from 1,200 to 1,600 degrees Fahrenheit. On the other hand, as the amount of toxic gas in the exhaust pipe rises, so does the operating temperature. The converter doesn't have to exert a lot of effort to complete its tasks.
With unleaded gas, catalytic converters operate as intended because lead in regular gas is poisonous to the catalyst and prevents it from capturing pollutants in vent fumes.
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HELP!!! WILL MARK BRAINLIEST!!!
Identify on the slide at least 2 reactions create a red or yellow product. (Write the reaction this way: Na2SO4 + AgNO3 using the compound on the left of the chart + the compound on the top of the chart).
Which ion do all of the red and yellow reactions have in common? Drag that ion from the list onto the board.
1. List at least two chemical reactions that resulted in a yellow, orange, or red precipitate.
2. The ion that all of the red and yellow reactions have in common is (drag from the list):
Answer:
Explanation:Silver nitrate, AgNO3 , will react with sodium sulfate, Na2SO4 , to produce silver sulfate, Ag2SO4 , an ionic compound that is considered insoluble in aqueous solution, and aqueous sodium nitrate.
What is the correct lewis electron-dot structure for the compound made of magnesium fluorine after forming an ionic bond?.
In the Lewis structure of MgF₂, each magnesium atom and each fluorine atom has two single bonds. Two fluorine atoms flank the magnesium atom. There are no lone pairs present on magnesium ion however there are three lone pairs on each of the fluorine atoms.
What is lewis electron-dot structure?Each element has a certain number of electrons in its atomic orbitals. Of these electrons, only those involved in bond formation with other atoms are present in the outermost shell of the atom. These electrons in the outermost orbital of the atom are called valence electrons.
MgF₂ is an ionic compound consisting of a magnesium cation and a fluoride anion. To draw the electron dot or Lewis diagram of this compound, you must first draw the electron configuration of the atoms.
Electronic configurations:
Mg : 1s²2s²2p⁶3s²
F : 1s²2s²2p⁵
By donating two electrons, magnesium has a full octet in its outer shell, and fluorine lacks only one electron to complete its octet, so two fluorine atoms bond with magnesium. Forms stable MgF₂ compounds. Thus an ionic bond is formed.
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give the oxidation number of chlorine in each of the following substances: nacl mgcl2 cl2 ocl2 clo3 - clf naclo
The oxidation state of chlorine in each of the following substance : NaCl, [tex]MgCl_{2}[/tex], [tex]Cl_{2}[/tex], [tex]OCl_{2}[/tex], [tex]ClO_{3}[/tex], Clf and NaClO are -1,-1,0,+1,+6,+1 and +1 respectively.
NaCl
The oxidation state of Na is +1 as it belongs to alkali metal group 1 substituting it to get the oxidation state of chlorine:
(1)+Cl= 0
Cl= -1
[tex]MgCl_{2}[/tex]
The oxidation state of magnesium is +2 as it belongs to group 2 alkaline earth metal substituting it to get oxidation of chlorine:
(+2)+2Cl=0
2Cl=-2
Cl =-2/2
Cl= -1
[tex]Cl_{2}[/tex]
As it is in the elemental state
= 0
[tex]OCl_{2}[/tex]
The oxidation state of oxygen is -2 substituting it to get oxidation state of chlorine:
(-2)+2Cl=0
2Cl= +2
Cl= 1
[tex]ClO_{3}[/tex]
Cl +3(-2)=0
Cl -6=0
Cl= +6
Clf
the oxidation state of fluorine(f) is -1 as it is from halogen group. Both chlorine and fluorine belong to same group and have same property but as fluorine is more reactive than chlorine oxidation state of fluorine is -1.
Cl-1=0
Cl=1
NaClO
(+1)+Cl(-2)=0
Cl -1=0
Cl= +1
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suppose you have an avogadro's number of potassium atoms. how many grams does this represent? report your answer to two decimal places.
The potassium atom represents 39.1 g grams.
Give a brief idea about Potassium.The chemical element potassium has the atomic number 19 and the letter K (which stands for kalium in Neo-Latin). Potassium is a silvery-white metal that may be easily and gently sliced with a knife. Within seconds of exposure, potassium metal quickly combines with air oxygen to produce flaky, white potassium peroxide. It was initially separated from potash, which is made up of plant ashes and from which it gets its name. Potassium is an alkali metal in the periodic table. All alkali metals have a single valence electron in the outer electron shell, which can be removed easily to produce a positive-charged ion called a cation, which interacts with anions to form salts. Only ionic salts include potassium in nature. Potassium interacts vehemently with water, producing enough heat to ignite the hydrogen released during the reaction and producing a flame that is purple in color. It is found in numerous minerals, including orthoclase, a common component of granites and other igneous rocks, and is dissolved in seawater, which contains 0.04% potassium by weight.
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