the rate constant (k ) for a reaction was measured as a function of temperature. a plot of lnk versus 1/t (in k ) is linear and has a slope of −1.15×104 k .

The name of the compound with the chemical formula Br2F8 is dibromo octafluorine.

The chemical formula of a compound shows the type and proportion of each element that makes up the chemical compound.

According to this question, a compound with chemical formula Br2F8 is given. The compound consists of the following:

Therefore, the name of the compound with the chemical formula Br2F8 is dibromo octafluorine.

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Answer:

A is  Mg^2+

B is K^+

C is Se^2-

D is Cl^-

Ca^2+ lies between  Mg^2+ and K^+

S^2-  lies between K^+ and Se^2-

Explanation:

I have attached an image of the four spheres.

Remember that, cations are smaller in size than the corresponding atom atom because the formation of a cation often involves the removal of an entire shell. Anions are larger in size than the corresponding atom because an electron is added thereby expanding the electron cloud and size of the anion.

From left to right let us designate the spheres as ABCD.

A is  Mg^2+

B is K^+

C is Se^2-

D is Cl^-

Ca^2+ lies between  Mg^2+ and K^+

S^2-  lies between K^+ and Se^2-

The size of the spheres, going from smallest to largest, would be: \(Mg^2^+\), \(K^+\), \(Ca^2^+\), \(Cl^-\), \(S^2^-\), \(Se^2^+\).

We can arrive at this answer because:

This is because when donating electrons, the cations get the largest number of protons. This makes the cation nucleus attract the electronic layers, decreasing their extension. In anion, the opposite happens and the increase of electrons increases the extension of the electronic layers.

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Answer:

51

Explanation:

Range= the difference between highest number and lowest number in a data set. For this, range =62-11 = 51

hope this helps

The factors that determine the solubility between two elements are the type of atomic bonds and the difference in atomic radii.

The factors that determine the solubility between two elements are the type of atomic bonds and the difference in atomic radii. The type of atomic bonds influences how strongly the atoms are attracted to each other and therefore how difficult it is for them to dissolve in a solvent. Ionic bonds are generally more soluble in polar solvents while covalent bonds are more soluble in nonpolar solvents. On the other hand, the difference in atomic radii determines how closely the atoms can pack together, affecting the crystal structure of the pure elements. A larger difference in atomic radii leads to a more open structure, making it easier for solvents to penetrate and dissolve the atoms. The spin of valent electrons does not directly impact solubility but can influence the reactivity and stability of the elements involved. In summary, both the type of atomic bonds and the difference in atomic radii play significant roles in determining the degree of solubility between two elements.

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Answer:

Explanation:

an ionic bond is formed by the conplete transfer of some electron from one atom to another.

Gas molecules will move from an area of higher partial pressure to an area of lower partial pressure.

The partial pressure of a gas (e.g. carbon dioxide in the lungs) allows the movement of molecules during physiological processes.

For example, during gas exchange, oxygen and carbon dioxide move in the respiratory system and circulatory system due to differences in the partial pressure of these gases.

In conclusion, gas molecules will move from an area of higher partial pressure to an area of lower partial pressure.

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yeah I don't know chemistry

Answer:

It allows for easier division of the sister chromatids into two identical chromosomes, one for each cell, and helps to prevent mistakes. You just studied 2 terms!

Explanation:

The method of seed dispersal of the pea plant happens in a mechanical way when the seeds disperse in different directions in what is known as explosive dispersal.

This refers to the movement of seeds through a variety of means from the parent plant.

Hence, we can see that the method of dispersal for the blueberry plant is through the process of suc--kering which occurs when new shoots grow and form new suc--kers from the main root cluster.

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The statements that are correct about Diastereomers are:

Diastereomers are those compounds that have the same molecular formula but are not mirror images of each other.

Examples of diastereomers include:

Therefore Diastereomers are not mirror images of each other and have the same molecular formula.

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A Mind Map is  described as an easy way to brainstorm thoughts organically without worrying about order and structure which allows you to visually structure your ideas to help with analysis and recall.

A mind map may transform a large list of uninteresting facts into a vivid, memorable, and meticulously structured diagram that corresponds to the way your brain naturally processes information.

We have two types of Combustion which are the complete combustion and incomplete combustion.

Complete Combustion is said to occur when there is sufficient oxygen, resulting in the complete oxidation of the fuel. It produces carbon dioxide and water as the primary products.

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When sulfur dioxide (SO2) and nitrogen oxides (NOX) are released into the atmosphere and carried by wind and air currents, acid rain is the volcanoes.

Thus, Nitric and sulfuric acids are created when the SO2 and NOX react with water, oxygen, and other substances. Then, before hitting the ground, they combine with water and other substances.

The majority of the SO2 and NOX that contribute to acid rain originates from burning fossil fuels, however a tiny amount comes from natural sources like volcanoes.  

Thus, When sulfur dioxide (SO2) and nitrogen oxides (NOX) are released into the atmosphere and carried by wind and air currents, acid rain is the volcanoes.

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Answer:

8 and 0

Explanation:

8 and 0 together make 80

When you dissolve a cube of sugar in a cup of tea, the entropy of the system increases.

The system in this context consists of the sugar cube and the tea. Initially, the sugar molecules are arranged in a crystalline structure, which is an ordered state. When the sugar cube is dissolved in the tea, the sugar molecules spread out and mix with the tea molecules, forming a more disordered state. As the randomness of the system increases, so does its entropy. Therefore, the entropy of the system increases when you dissolve a cube of sugar in a cup of tea.

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Answer:

1) Water molecules are polar.

The two molecules of hydrogen are slightly positively charged, whereas the molecule of oxygen is slightly negatively charged. This is because the electrons are more attracted to the oxygen end of the molecule than the hydrogen end.

2) Water molecules frequently organize into spheres.

This is due to the molecules' mutual attraction to one another due to gravity. They also increase surface tension, which also promotes the formation of water spheres. The hydrogen bonds that exist between molecules are what produce the surface tension. This has a balance between being weak enough to be readily disturbed and robust enough to support its own weight inside the sphere.

Hope this helps! :)

Answer:

sonic boom

The nurse would use the relief of chest pain or improvement in symptoms as the outcome to determine the effectiveness of sublingual nitroglycerin.

Sublingual nitroglycerin is a medication commonly used to relieve chest pain or angina in patients with cardiovascular conditions such as coronary artery disease. The nurse administers nitroglycerin under the tongue (sublingually) to ensure rapid absorption into the bloodstream.

To assess the effectiveness of sublingual nitroglycerin, the nurse would look for specific outcomes related to the relief of symptoms. The primary outcome would be the reduction or elimination of chest pain or angina symptoms experienced by the patient. Nitroglycerin works by dilating blood vessels, improving blood flow to the heart, and reducing the workload on the heart, which can alleviate chest pain associated with angina.

The nurse would closely monitor the patient's response to nitroglycerin administration, assessing for any improvement in symptoms, such as a decrease in chest pain intensity, relief from shortness of breath, or resolution of other associated symptoms. These positive outcomes would indicate the effectiveness of the sublingual nitroglycerin in providing relief to the patient.

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Using the law of the conservation of mass, the reactions can be shown to obey the law.

We need to know what the law of the conservation of mass says so that we can be able to know how we can be able to apply the law in the proper perspective. We have to know that the law says that total mass of the system would remain constant. The implication of this is that the mass before the reaction would be the same as the mass after the reaction. The mass of the substance must be able to add up in the system that is under study as we have one here.

Mass of the iron = 56 g

Mass of the chlorine = 35.5 g

Balanced reaction equation;

\(2Fe + 3Cl_{2} ---- > 2FeCl_{3}\)

This is the  formation of the iron III chloride

Total mass on the right hand side = 2(56) + 6(35.5) = 325 g

Total mass on the left hand side = 2[56 + 3(35.5)] = 325 g

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The mass of the precipitate, BaSO₄ obtained from the given reaction is 18.64 grams

Mole = Molarity x Volume

Mole of Na₂SO₄ = 0.3 × 0.3

Mole of Na₂SO₄ = 0.09 mole

Mole = Molarity x Volume

Mole of BaCl₂ = 0.4 × 0.2

Mole of BaCl₂ = 0.08 mole

Balanced equation

Na₂SO₄(aq) + BaCl₂(aq) —> BaSO₄(s) + 2NaCl(aq)

From the balanced equation above,

1 mole of BaCl₂ reacted with 1 mole of Na₂SO₄.

Therefore,

0.08 mole of BaCl₂ will also react with 0.08 mole of Na₂SO₄.

From the above illustration, we can see that only 0.08 mole of Na₂SO₄ out of 0.09 mole given is neede to react completely with 0.08 mole of BaCl₂.

Therefore, BaCl₂ is the limiting reactant

Balanced equation

Na₂SO₄(aq) + BaCl₂(aq) —> BaSO₄(s) + 2NaCl(aq)

From the balanced equation above,

1 mole of BaCl₂ reacted to produce 1 mole of BaSO₄.

Therefore,

0.08 mole of BaCl₂ will also react to produce 0.08 mole of BaSO₄.

The mass of BaSO₄ can be obtained as follow

Mass = mole × molar mass

Mass of BaSO₄ = 0.08 × 233

Mass of BaSO₄ = 18.64 g

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Answer:

Ammonium lauryl sulfate, like any other surfactant, makes a good base for cleansers because of the way it disrupts the hydrogen bonding in water. Hydrogen bonding is the primary contributor to the high surface tension of water. In hydrogen bonding with the water surrounding them.

Statements C. The cell has a complete set of genes but only a fraction of these genes are expressed is true about a specialized cell.

The process of cell specialization makes reference to the expression of a given group of genes in a cell so the cell generates specific proteins that are required to play certain functions.

Therefore, with this data, we can see that the process of cell specialization is based on the expression of a specific group of genes and it leads to specific structural or enzymatic proteins.

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Electrons are negativity charge particle found in an atom. His twine is Proton who is positively charged

Answer:Chemical reaction

Explanation:

The main concept that must be applied to determine the coefficients (amount of each item) is that there must be equal amounts of each element on each side of the equation. We are not destroying or creating new atoms. In this case, the unbalanced reaction formula is:

B

r

2

+

K

I

=

K

B

r

+

I

2

There are a two problems we need to solve before it will be balanced:

There are two moles of Iodine atoms (

I

) on the right side of the equation, while there is only one mole on the right side.

There are two moles of bromine (

B

r

) atoms on the left side, while there is only one on the right.

Since there are two moles of bromine atoms on the left side, we need two moles on the right as well. We can do this by adding a coefficient of two to the

'

K

B

r

'

term in the equation. Our now modified equation looks like this:

B

r

2

+

K

I

=

2

K

B

r

+

I

2

There is one mole of Iodine atoms on the left, and two on the right. To fix this, we add a coefficient of two to the

'

K

I

'

term. The resulting equation is below.

B

r

2

+

2

K

I

=

2

K

B

r

+

I

2

Bonus step: We can also put ones in front of the coefficient-less species. This is like changing a phrase from "an apple" to "1 apple". It is the exact same thing, but makes it a little more clear sometimes. This would like like this:

1

B

r

2

+

2

K

I

=

2

K

B

r

+

1

I

2

Can you see that there is now an equal amount of each element on each side of the equation? That means that it is balanced.

Answer: its a reduction and an oxidation reaction

Explanation:

Answer:

many joules are required to heat 75 grams of water from -85*C to 185*C? (Csteam 1.84 Jlg*'C, Cwater 4.184 Jlg*%C, Cice 2.09 ) Jlg* C, AHfusion 6.01 kJ/

The energy requirements,

345,524 joules are required to heat 75 grams of water from -85*C to 185*C, taking into account the phase changes at 0*C and 100*C.

To solve this problem, we need to break it down into two parts: heating the water from -85*C to 0*C, and then from 0*C to 185*C. We also need to take into account the energy required for the phase changes at 0*C and 100*C.

First, we need to calculate the energy required to heat 75 grams of water from -85*C to 0*C:

Q = mcΔT
Q = 75g x 4.184 J/g*C x (0 - (-85))
Q = 26,541 J

Next, we need to calculate the energy required for the phase change from ice to water at 0*C:

Q = n x AHfusion
n = m/M (where m is the mass and M is the molar mass of water)
n = 75g / 18.015 g/mol = 4.159 mol
Q = 4.159 mol x 6.01 kJ/mol x 1000 J/kJ = 25,180 J

Now we need to calculate the energy required to heat the water from 0*C to 100*C:

Q = mcΔT
Q = 75g x 4.184 J/g*C x (100 - 0)
Q = 31,380 J

We also need to take into account the energy required for the phase change from water to steam at 100*C:

Q = n x AHvap
n = m/M (where m is the mass and M is the molar mass of water)
n = 75g / 18.015 g/mol = 4.159 mol
Q = 4.159 mol x 40.7 kJ/mol x 1000 J/kJ = 169,033 J

Finally, we need to calculate the energy required to heat the steam from 100*C to 185*C:

Q = mcΔT
Q = 75g x 1.84 J/g*C x (185 - 100)
Q = 93,390 J

Adding up all of the energy requirements, we get:

26,541 J + 25,180 J + 31,380 J + 169,033 J + 93,390 J = 345,524 J

Therefore, 345,524 joules are required to heat 75 grams of water from -85*C to 185*C, taking into account the phase changes at 0*C and 100*C.

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The specific heat capacity of a substance is the amount of heat needed to elevate it by 1 degree kelvin per gram. The easier it is for something to heat up, then, the smaller the heat capacity. We would suppose that a cook in a hurry would want a pan that heats up more quickly and would choose one with a lesser heat capacity.

0.385 for copper and 0.900 for aluminum.

Despite using non-SI units, we can still compare using it. It is obvious to him that copper has a lower specific heat, so he will pick that.

In case you're curious, you can also approach this issue from the perspective of heat conduction. To do this, look up the thermal conductivities of each material, and then apply Fourier's rule of heat conduction to determine that Copper would be best.

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The intermolecular forces in HF, \(CCl_4\) and \(CH_3Cl\) molecules are hydrogen bonding, dispersion forces and dipole-dipole interactions respectively.

Intermolecular forces, such as the electromagnetic forces of attraction or repulsion that act between atoms in a molecule and other kinds of nearby particles, such as atoms or ions, mediate interactions between molecules.

The attractive forces that occur between molecules are known as intermolecular forces. They control a number of bulk characteristics, including the solubilities (miscibilities) of compounds and their melting and boiling temperatures.

Intermolecular forces may be divided into four categories: hydrogen bonding, London dispersion forces, ion-dipole, and dipole-dipole.

HF has a hydrogen bond, also known as an H-bond, is an electrically charged attraction between an electronegative atom containing a single pair of electrons, known as the hydrogen bond acceptor, and a hydrogen (H) atom that is covalently attached to a more electronegative "donor" atom or group.

\(CCl_4\) has London dispersion forces which is the least powerful intermolecular force. When the electrons in two nearby atoms hold positions that cause the atoms to temporarily form dipoles, the consequence is the London dispersion force, a transient attractive attraction.

\(CH_3Cl\) has dipole-dipole interactions where molecules having permanent dipoles are drawn to one another electrostatically; for example, the positive end of one molecule will attract the negative end of another, and so forth, eventually causing the molecules to align.

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Number of atoms : 2.245 x 10²⁴

A mole is a number of particles(atoms, molecules, ions)  in a substance

This refers to the atomic total of the 12 gr C-12  which is equal to 6.02.10²³, so 1 mole = 6.02.10²³ particles  

Can be formulated :

N = n x No

N = number of particles

n = mol

No = 6.02.10²³ = Avogadro's number

n= 3.73 moles

Number of atoms :

\(\tt 3.73\times 6.02\times 10^{23}=\boxed{\bold{2.245\times 10^{24}}}\)

The answer is very probable because of how incredibly small atoms are

Very probable because of how incredibly small atoms are the chances that at least one of the atoms exhaled in your first breath will be in your last breath.

Hydrogen and oxygen always react in a 1:8 ratio by mass to form water. early investigators thought this meant that oxygen was 8 times more massive than hydrogen.

If you say that something is probable, you mean that it is likely to be true or likely to happen.

Everything around us is made up of really tiny molecules. However, such molecules are constructed from much smaller atoms. Then, even smaller protons, neutrons, and electrons are used to build those atoms. Quarks, which are even smaller particles than protons, make up protons.

The smallest unit of substance that may be disassembled without ejecting any electrically charged particles is the atom. The smallest piece of substance that displays an element's distinctive qualities is an atom. As a result, the atom serves as the basic unit of chemistry.

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