how do you use CFSE in determining spinel structure type

Answer:

Stereotyping provides humans with the ability to quickly sort out patterns in a randomly diverse world filled with people of every size, shape, gender, age, color, and sexual orientation. And it’s just a quick first pass, nothing more

Answer:

I think this is the answer M=F/AM=4N/8m/s/sM=0.5kg.

Explanation:

I hope this helped!!

Answer:

It vaporizes.

Explanation:

When a substance absorbs heat energy and doesn't increase its temperature, that means it's going through a change of phase.

The next change of phase for a liquid is turning to a gas, so it vaporizes.

Ionization energy generally decreases down a group because as one moves down a group, the outermost electron moves further away from the nucleus and it takes less energy to remove it.

Ionization energy, also known as ionization energy, would be the minimal amount of energy needed to free an isolated gaseous atom's or molecule's least loosely bonded electron.

First ionization energy often drops as you advance down a group on the periodic table. This occurs even though the outermost electron would be typically held less securely and can be removed with less energy since it travels farther away from the nucleus.

Therefore, Ionization energy generally decreases down a group because as one moves down a group, the outermost electron moves further away from the nucleus and it takes less energy to remove it.

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Answer:

90.71 KJ

Explanation:

From the reaction equation, lead is the cathode while copper was the anode.

Hence;

E°anode = +0.34V

E°cathode = -0.13 V

E°cell =E°cathode - E°anode

E°cell = -0.13 V - 0.34V

E°cell = -0.47 V

But;

ΔG° = -nFE°cell

n= number of electrons transferred = 2

F = Faraday's constant = 96500 C

E°cell = -0.47 V

ΔG° = -(2 * 96500 * (-0.47))

ΔG° = 90,710 J or 90.71 KJ

The standard Gibbs free energy for the reaction

Pb²⁺(aq) + Cu(s) → Pb(s) + Cu²⁺(aq) is 89.3 kJ/mol.

Let's consider the following redox reaction.

Pb²⁺(aq) + Cu(s) → Pb(s) + Cu²⁺(aq)

We can identify both half-reactions.

Reduction (Cathode): Pb²⁺(aq) + 2 e⁻ → Pb(s)    E°red = -0.126 V

Oxidation (Anode): Cu(s) → Cu²⁺(aq) + 2 e⁻       E°red = +0.337 V

We can calculate the standard potential of the cell (E°cell) using the following expression.

E°cell = E°red,cathode - E°red,anode = -0.126 V - 0.337 V = -0.463 V

The standard Gibbs free energy (ΔG°) is a way to measure the spontaneity of a reaction. We can calculate it using the following expression.

ΔG° = − n × F × E°cell =

ΔG° = − 2 mol × (96,485 J/V.mol) × (-0.463 V) × (1 kJ/1000 J) = 89.3 kJ/mol

where,

Since ΔG° > 0, the reaction is not spontaneous.

The standard Gibbs free energy for the reaction

Pb²⁺(aq) + Cu(s) → Pb(s) + Cu²⁺(aq) is 89.3 kJ/mol.

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A conjugate acid-base pair consists of two substances that are related to each other by the loss or gain of a hydrogen ion. The compound that donates a hydrogen ion in an acid-base reaction is the acid, while the compound that accepts the hydrogen ion is the base.

This relationship between the acid and the base gives rise to a conjugate acid-base pair. The acid in the pair is typically a species that has an acidic proton, while the base in the pair is the species that is produced when the acid loses a proton. For example, consider the reaction of acetic acid (CH3COOH) with water (H2O). The acid in this reaction is acetic acid, which donates a hydrogen ion to water. The base in the reaction is the acetate ion (CH3COO-), which is produced when acetic acid loses a hydrogen ion.

Thus, the conjugate acid-base pair in this reaction is CH3COOH (acid) and CH3COO- (base). These two species are related to each other by the loss or gain of a hydrogen ion, and they are said to be conjugate to each other.

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0.5 * x + 0.9 * y = 0.6 * is the equation that represents the total liters of acid that are needed.

What is an equation?

An equation is a mathematical statement that asserts the equality of two expressions. It uses an equal sign (=) to show that the expressions on either side of the sign have the same value. Equations are typically used to solve problems by finding the unknown values of certain variables.

The total amount of acid in the 50% solution can be represented as 0.5 * x liters.

The total amount of acid in the 90% solution can be represented as 0.9 * y liters.

The total amount of acid in the mixture of the two solutions should equal to 0.6 * liters, which is equal to the desired 60% solution.

So, the equation representing the total liters of acid needed is:

0.5 * x + 0.9 * y = 0.6 *

This equation represents the relationship between the liters of the two solutions used and the total amount of acid in the solution.

Therefore, 0.5 * x + 0.9 * y = 0.6 * is the equation.

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Answer:

4) Aluminum Oxide

Explanation:

Answer:

Aluminum Oxide

Explanation:

:)

In the  SiO4 tetrahedron, each oxygen atom has a negative charge, and there are four oxygen atoms in the molecule. therefore, the  total electrical charge on the tetrahedron is -4.

The silicon-oxygen tetrahedron SiO4 is a molecule in which one silicon atom Si is bonded to four oxygen atoms in a tetrahedral arrangement. Each oxygen atom shares two electrons with the silicon atom to form covalent bonds. the resulting structure is a tetrahedron with a central silicon atom and four surrounding oxygen atoms.

In a covalent bond, atoms share electrons to fill their outermost shells, which is called the valence shell. Oxygen has six electrons in its valence shell, and it needs two more electrons to complete its octet. When oxygen shares two electrons with the silicon atom, it satisfies this requirement, and the oxygen atom becomes negatively charged.

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Ions present in the solution of the Na₃PO₄ is Na⁺ and PO₄³⁻.

The Sodium is the metal from the first column group and it has ability to donate ion and form the 1+ charge. The Phosphate has the ability to form the negative ion as the 3- charge. This is the reason that there are the 3 sodium ion for the 1 phosphate ion when Na₃PO₄ molecule is dissolved in the water. The ion are :

Na₃PO₄  --->  3Na⁺  +  PO₄³⁻

The ionic compound name is the sodium phosphate. The ionic compound is formed when the bond is formed by the sharing of the electrons.

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When calcium and oxygen interact, calcium oxide is created. Calcium oxide has the chemical formula CaO. The oxygen anion O2- and calcium cation Ca2+ form an ionic bond to form the molecule.

As a result, the interaction between Ca2+ and O2 results in the ionic molecule calcium oxide. The chemical name is CaO.

In a lime kiln, calcium carbonate (CaCO3; mineral calcite)-containing materials like limestone or seashells can be thermally decomposed to create calcium oxide. Calcination is the name of the method used to manufacture burnt lime.

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The mole fraction of carbon dioxide in the mixture is

P(CO₂) = 0.00004 × 76mmHg

           = 0.304mmHg

The key to this problem is the fact that each component of a gas mixture contributes to the total pressure exerted by the mixture in proportion to the number of molecules in the mixture.

Partial pressures of gases are most often expressed as mole fractions.

                    P(gas) = χ(gas) × P(mixture)

This is the proportional to the number of molecules.

As you know, 1 mole of a substance is exactly 6.022⋅10²³

molecules of that substance. This is known as the Avogadro number Nₐ.

This means that the number of molecules, say x and Avogadro's number

No. can be used to express the number of moles of a gas.

             From a mole =  Number of Molecules × Nₐ

Now, the percentage composition of a gas mixture is the number of molecules each gas contributes to 100 molecules of the mixture.

In this case, the air must contain 0.04% carbon dioxide. This means that there are 0.04 CO₂ molecules in 100 air molecules.

For example, the number of moles of carbon dioxide in 100 air molecules is ⁿCO² = 0.04 molecules × Nₐ

            = 0.04 Nₐ

This air sample is

n (total) = 100 molecules × Nₐ

            = 100⋅Nₐ

This means that the mole fraction of carbon dioxide in the mixture is

P(CO₂) = 0.00004 × 76mmHg

           = 0.304mmHg

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Answer:

Types of fronts because meteorologists are able to predict the weather by the looking at the air mass (fronts) in the atmosphere.

Answer:

Types of fronts

Explanation:

Explanation:

There are several pieces of evidence that can be used to identify chemical changes, other than a change in color. Some of these include the production of a gas, the formation of a precipitate, a change in temperature, and a change in the state of matter (e.g. from a solid to a liquid or vice versa). For example, if a solid substance is added to a liquid and bubbles of gas are produced, this is evidence of a chemical change. Similarly, if two clear solutions are mixed together and a solid precipitate forms, this is also evidence of a chemical change. Additionally, if a substance is heated and it changes from a solid to a liquid or from a liquid to a gas, this is also evidence of a chemical change.

The molecule that contains polar covalent bonds, but is nonpolar is option i only.What are polar covalent bonds?A polar covalent bond is a type of bond that occurs between two atoms of differing electronegativities.

These bonds are characterized by an unequal sharing of electrons, which causes one atom to carry a partial negative charge and the other atom to carry a partial positive charge.What are nonpolar molecules?A molecule in which all atoms have the same electronegativity and the electron distribution is equal is called a nonpolar molecule.

These molecules have no dipole moment because the electron charges are symmetrically distributed around the atoms.Some examples of nonpolar molecules are mentioned below:CCl4 (Carbon Tetrachloride)CH4 (Methane)CF4 (Carbon Tetrafluoride)CO2 (Carbon Dioxide)Option i only contains the polar covalent bonds but is nonpolar. Hence,

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The volume 0.175 molar NaOH required to titrate 25 ml of 0.350 molar acetic acid to the equivalence point is 50 ml.

Equivalence point in a titration is the point at which the titrant completely reacted with the analyte in the perfect stoichiometric ratio. Equivalence point can be identified using an indicator color change.

If we have M1 molar solution in V1 volume titrated with M2 molar solution of V2 volume, then we can write it as:

M1V1 = M2V2.

Here, the volume and molarity of acetic acid is 25 ml and 0.350 molar. The volume required for 0.175 m NaOH for titration is :

volume of NaOH = (volume of acetic acid × molarity) / molarity of NaOH

                             = (0.350 × 25 ml) /0.175

                             = 50 ml.

Therefore, the volume of NaOH required in this titration is  50 ml.

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To calculate the actual heat, I'd use calorimetric to weigh a sample mass. I 'd calculate the mass of a material sample. At a specified temperature, I will heat the material. I should position the heated material inside a calorimeter for coffee cup containing an initially established mass of water. I 'd wait for the weather to stabilize and then measure the difference in weather. To assess the sum of energy consumed, I will use the increase in water temperatures. For measure real heat I will use the sum of energy per material, weight, and temperature shift.

-------------------------------

Hope this helps!

Brainliest would be great!

-------------------------------

With all care,

07x12!

Answer:

-I would use calorimetry to determine the specific heat.

-I would measure the mass of a sample of the substance.

-I would heat the substance to a known temperature.

-I would place the heated substance into a coffee-cup calorimeter containing a known mass of water with a known initial temperature.

-I would wait for the temperature to equilibrate, then calculate temperature change.

-I would use the temperature change of water to determine the amount of energy absorbed.

-I would use the amount of energy lost by substance, mass, and temperature change to calculate specific heat.

Answer:

151.988 how i don't know

Radical reduction is demonstrated by the reaction of internal alkyne with Na/liquid NH3, which transforms the alkyne into a trans alkene. 2-Butyne reduced into trans 2-Butene in our situation.

(MAH-leh-kyool) The smallest particle of a material that possesses all of the substance's physical and chemical characteristics. A single atom or more make form a molecule.

Alkynes are hydrocarbons with triple-bond carbon atoms in them. For molecules with a single triple bond, their standard formula is CnH2n-2 (and no rings). Alkyne go through many of the same reactions as alkenes, but they have the ability to react twice thanks to the two p-bonds in the triple bond.

Alkynes, which have the empirical formula CnH2n2, are organic compounds formed of functional group carbon-carbon triple bonds. These hydrocarbons are unsaturated.

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Answer:

22.98977

Explanation:

Na is actually sodium and its atomic number is 11.

I'm not sure if this is multiple choice or a question where you have to answer in writing but here is the mass of Na 22.98977.

Hope this helps

Answer:

C₂H6

Explanation:

Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). Option A

A hydrocarbon is a compound that consists of only carbon and hydrogen atoms. It is important to identify the formula that represents a hydrocarbon among the given options:

A) C₂H6: This formula represents ethane, which is a hydrocarbon. Ethane consists of two carbon atoms bonded together with single bonds and six hydrogen atoms.

B) C₂H5OH: This formula represents ethanol, which is not a hydrocarbon. Ethanol contains a hydroxyl group (-OH), indicating the presence of oxygen in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.

C) C₂H5Cl: This formula represents ethyl chloride, which is not a hydrocarbon. Ethyl chloride contains a chlorine atom (Cl) in addition to carbon and hydrogen atoms. It is a haloalkane, not a hydrocarbon.

D) C₂H6O: This formula represents ethanol, which, as mentioned before, is not a hydrocarbon. Ethanol contains an oxygen atom (O) in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.

Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). It consists only of carbon and hydrogen atoms, making it a suitable representation of a hydrocarbon.

In summary, the formula C₂H6 (option A) represents a hydrocarbon, while the other options contain additional elements (oxygen or chlorine) that make them non-hydrocarbon compounds. Option A

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Answer:

I hope I can help

Explanation:

I hope I can help you

Lewis dot structures, electron "."structures, are diagrams that depict both the interactions of atoms within a molecule and any lone pairs of electrons that may be present. There will be four dots surrounding the letter C, which stands for carbon.

The electrons in their valence shells can be shared or transferred when atoms come together to form compounds. Lewis . structures were used as tents.

Each of the four valence electrons is represented as a . in the Lewis symbol for carbon.

This displays the carbon letter C with four dots surrounding it. The four dots stand for the four electrons that make up carbon's valence shell. The 2s and 2p orbitals are home to these electrons.

The electrons added to or subtracted from the Lewis dot diagram when the atom is an ion are equal to the charge's magnitude. An anion (negative charge) has electrons added to it, whereas a cation (positive charge) has electrons subtracted.

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Ans

Higher surface area

Explanation:

The rate of chemical reacts are determined by temperature, agitation, and surface area. The more surface a substance is exposed to, the more it reacts.

Answer:

lustrous

malleable

ductile

sonorous

good conductors of electricity and heat

Answer:

657/865= 75.9

D. 76%