Identify the Lewis acid in the following reaction: Co2+(aq)+6NH3(aq)⇌Co(NH3)62+(aq)

Energy is inversely proportional to the wavelength of a wave. Which would have the GREATEST energy. A wave with a wavelength of  5  meters.

The relationship between wavelength and energy is given as :

E = hf

E = h c / λ

where,

E = energy

h = Planck constant

c = speed of light

λ = wavelength

So, energy is inversely proportional to wavelength,  therefore, the wave having least amount of wavelength will have greatest amount of energy. So, according to the given value . the wavelength 5 m will have greatest energy.

Thus, Energy is inversely proportional to the wavelength of a wave. Which would have the GREATEST energy. A wave with a wavelength of  5  meters.

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Answer:

Couldn't figure out how to edit the other one to attach the image, but here is it with the labels. Also put the same explanation down below so you don't have to go to the other if you wanted to look at it in conjunction with the image.

Explanation:

Mass extinctions are periods of time where the organisms are essentially wiped out in an extremely brief period of time. You can see how the species just drops off. Adaptive radiation occurs when there is a diversification of a group of organisms as evident by the rise in the number of marine animal groups shown by the bracketed area.

Answer:

*ೃ: He became one of the foremost advocates of freedom of belief. John Locke is also known as the "Father of liberalism."

To determine the moles of a compound from the mass in grams, we must use the molecular mass. The molecular mass is calculated by adding the atomic weights of the elements multiplied by the atoms of the element present in the molecule. To make it easier we can make the following table:

We have that the molar mass of CHCl3 is: 119.377g/mol.

The number of moles will be:

In 16.0g pf CHCl3 there are 0.134 moles

Answer:

Lithium oxide.......................

Explanation:

6. magnicium chloride

2.Barium chloride

3. calcium nitride

4. lithium oxide

5. Aluminium sulphide

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The rate law for the reaction between iodide ion and dibromothane (C₂H₄Br₂) in methanol is determined to be Rate = k[C₂H₄Br₂][I], indicating that the reaction is first-order with respect to both reactants.

The rate constant (k) for the reaction is calculated to be approximately 4.88 M⁻¹s⁻¹ using the initial rate data from Experiment 1.

The rate of consumption of iodide ion (I) is estimated to be around 1.79 M/s when [C₂H₄Br₂]₀ = 0.74 M and [I]₀ = 0.52 M.

The activation energy (Ea) for the reaction is found to be approximately 51.3 kJ/mol using the Arrhenius equation and temperature data from Experiment 4.

To determine the rate law, we need to examine how the initial rates change with respect to the initial concentrations of the reactants. Let's consider the first experiment (Experiment 1) and compare it with the other experiments:

Experiment 1: [C₂H₄Br₂]₀ = 0.127 M, [I]₀ = 0.102 M, Initial rate = 6.45x10⁻² M/s

Experiment 2: [C₂H₄Br₂]₀ = 0.254 M (2 * [C₂H₄Br₂]₀), [I]₀ = 0.127 M (2 * [I]₀), Initial rate = 0.102 M/s (2 * Initial rate)

Experiment 3: [C₂H₄Br₂]₀ = 0.204 M (1.6 * [C₂H₄Br₂]₀), [I]₀ = 1.29x10⁻² M (0.126 * [I]₀), Initial rate = 0.204 M/s (3.16 * Initial rate)

From the comparisons above, we can see that doubling the initial concentrations of both reactants (Experiment 2) doubles the initial rate, indicating that the reaction rate is first-order with respect to both [C₂H₄Br₂] and [I].

The rate law for the reaction can be expressed as:

Rate = k[C₂H₄Br₂]ᵃ [I]ᵇ

Since the reaction is first-order with respect to both reactants, we have a = 1 and b = 1.

Therefore, the rate law for the reaction is:

Rate = k[C₂H₄Br₂][I]

To determine the rate constant (k), we can choose any of the experiments and use the given data. Let's use Experiment 1:

[C₂H₄Br₂]₀ = 0.127 M

[I]₀ = 0.102 M

Initial rate = 6.45x10⁻² M/s

Plugging these values into the rate law equation, we can solve for k:

6.45x10⁻² = k(0.127)(0.102)

k = 6.45x10⁻² / (0.127)(0.102)

k ≈ 4.88 M⁻¹s⁻¹

So, the rate constant for the reaction is approximately 4.88 M^(-1)s^(-1).

Now, to determine the rate of consumption of iodide ion (I) when [C₂H₄Br₂]₀ = 0.74 M and [I]₀ = 0.52 M, we can use the rate law:

Rate = k[C₂H₄Br₂][I]

Plugging in the given concentrations and the rate constant we just determined:

Rate = (4.88 M^(-1)s⁻¹)(0.74 M)(0.52 M)

Rate ≈ 1.79 M/s

Therefore, the rate of consumption of iodide ion when [C₂H₄Br₂]₀ = 0.74 M and [I]₀ = 0.52 M is approximately 1.79 M/s.

The Arrhenius equation is given as:

k = Ae^(-Ea/RT)

where k is the rate constant, A is the pre-exponential factor, Ea is the activation energy, R is the gas constant (8.314 J/(mol·K)), and T is the temperature in Kelvin.

From the given data, we have:

Experiment 1: T = 20°C = 293 K

Experiment 2: T = 20°C = 293 K

Experiment 3: T = 20°C = 293 K

Experiment 4: T = 40°C = 313 K

Let's consider Experiment 1:

[C₂H₄Br₂]₀ = 0.127 M

[I]₀ = 0.102 M

Initial rate = 6.45x10⁻² M/s

We can rearrange the rate law equation to solve for the pre-exponential factor (A):

A = k / ([C₂H₄Br₂]₀[I]₀)

Plugging in the values for Experiment 1:

A = (4.88 M⁻¹s⁻¹) / (0.127 M * 0.102 M)

A ≈ 37.80 s⁻¹

Now, we can use the Arrhenius equation with Experiment 4 to determine the activation energy (Ea):

k = Ae^(-Ea/RT)

Rearranging the equation:

ln(k) = ln(A) - (Ea/RT)

Taking the natural logarithm of the rate constant from Experiment 4:

ln(k) = ln(1.79 M/s)

Substituting the values into the equation:

ln(1.79 M/s) = ln(37.80 s^(-1)) - (Ea / (8.314 J/(mol·K) * 313 K))

Simplifying the equation:

ln(1.79) = ln(37.80) - (Ea / (8.314 * 313))

Now, solve for Ea:

Ea = -(ln(1.79) - ln(37.80)) * (8.314 * 313)

Ea ≈ 51,253 J/mol or 51.3 kJ/mol

Therefore, the activation energy for this reaction is approximately 51.3 kJ/mol.

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Answer:

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Answer: There are few simple rules to follow.

(1) The atomic number is equal to the number of protons.

Z

= number of protons

(2) In neutrally charged elements, the number of electrons is the same as the number of protons.  

Z

= number of protons = number of electrons (no charge)

Otherwise, positive charge means that the element lost an electron and negative charge means it gained an electron.

(3) The atomic mass is equal to the sum of the number of protons and number of neutrons.

A

= number of protons + number neutrons  

or

A

=  

Z

+ number neutrons

So if you say that  

Z

= 20 and  

A

= 40, then

A

=  

Z

+ number neutrons

40 = 20 + number of neutrons

40 - 20 = number of neutrons

Therefore,

number of neutrons = 20

Explanation:

Answer:

solubility

Explanation:

Solubility is the ability of a solid, liquid, or gaseous chemical substance (referred to as the solute) to dissolve in solvent (usually a liquid) and form a solution. The solubility of a substance fundamentally depends on the solvent used, as well as temperature and pressure.

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Answer:

Solubility

Explanation:

just in case

Explanation:

lungs is the main organ of the human breathing system

Answer:

A group of cells working together is defined as a tissue and several tissues working together comprise an organ.

Explanation:

Answer:

hydrogen bonds

Explanation:

this is because the type of bonding occurs between electropositive forces.

Water molecules have a polarity, which allows them to be electrically attracted to other water molecules and other polar molecules by Hydrogen bonds.

Hydrogen Bond

Between a hydrogen (H) atom that is covalently bonded to a more electronegative "donor" atom or group and another electronegative atom bearing a lone pair of electrons—the hydrogen bond acceptor—a hydrogen bond (or H-bond) forms (Ac). The second-row elements fluorine, oxygen, and nitrogen are the most common donor and acceptor atoms (F).

It may take place either intramolecularly or intermolecularly (between different molecules) (occurring among parts of the same molecule). The energy of a hydrogen bond can range from 1 to 40 kcal/mol and is influenced by the shape, surroundings, and nature of the particular donor and acceptor atoms.

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Answer:

56.52 units

Explanation:

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The molarity of the solution resulting from dissolving 55.7 g of silver nitrate in enough water to give a final volume of 721 ml is 0.56 M.

Molarity refers to the concentration of a solution, usually measured in moles per liter (M). The number of moles of solute in a solvent can be determined using molarity. The following formula is used to calculate the molarity of a solution: Molarity = moles of solute ÷ liters of solution

Therefore, the molarity of the solution resulting from dissolving 55.7 g of silver nitrate in enough water to give a final volume of 721 ml is calculated as follows:

Convert the mass of silver nitrate to moles using its molar mass: AgNO3 molar mass = 107.87 g/mol

Number of moles of AgNO3 = mass / molar mass

= 55.7 g / 107.87 g/mol

= 0.515 M

Calculate the volume of the solution in liters: Volume of solution = 721 ml / 1000 ml/L

Volume of solution = 0.721 L

Using the molarity formula above, the molarity of the solution can be calculated:

Molarity = moles of solute ÷ liters of solution

Molarity = 0.515 mol ÷ 0.721 L

Molarity = 0.56 M

Therefore, the molarity of the solution resulting from dissolving 55.7 g of silver nitrate in enough water to give a final volume of 721 ml is 0.56 M.

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Explanation:

Covalent bonds can be classified based on the number of bonds between atoms into three categories:

1. Single Covalent Bond: In a single covalent bond, two atoms share one pair of electrons. This is the most common type of covalent bond. For example, in H2O, each hydrogen atom forms a single covalent bond with the oxygen atom.

2. Double Covalent Bond: In a double covalent bond, two atoms share two pairs of electrons. This bond is stronger than a single covalent bond. For example, in O2, the oxygen atoms are connected by a double covalent bond.

3. Triple Covalent Bond: In a triple covalent bond, two atoms share three pairs of electrons. This bond is the strongest among the three types. For example, in N2, the nitrogen atoms are connected by a triple covalent bond.

It is important to note that the number of bonds between atoms is determined by the number of electrons they need to achieve a stable electron configuration, which varies depending on the elements involved.

The covalent bond is classified mainly into three types

single, double and triple bonds.

Covalent bond is a bond formed between two atoms through the sharing of two electrons between them.  The atoms will share more than one electron pairs if the valency is not satisfied.  the three types of covalent bond are single bond, double bond and triple bond.

single bond is formed when one pair of electrons are shared between atoms, while if two pairs or three pairs are shared, it is called double or triple bond respectively. Covalent compounds are those which contains covalent bonding.

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The quantity of space occupied by an object and substance is defined as its mass.

An element would be a pure homogeneous substance composed of identical atoms. Because chemistry would be the study of stuff, it's more convenient to be using symbols to symbolize the elements than using the complete word.

Each atom is variable in size and hence mass. The periodic table shows the relative masses from each element. One atom of magnesium, as well for example, weighs 24.31 amu (atomic mass units). One mole containing magnesium, on the other hand, weighs 24.31 g.

Because one mole of MgCl2 is made up of one mole or magnesium as well as two moles of chlorine, the mass among one mole of MgCl2 must equal the total of the elements' masses. The molar mass as well as the molecular weight of either a material is its mass in one mole.

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If 250 mL of methane (CH4) effuses through a small hole in 48 s, the time required for the same volume of helium to pass through the hole is approximately 96 s.

The effusion rate of a gas is inversely proportional to the square root of its molar mass, according to Graham's law of effusion. In this case, we need to compare the effusion rates of methane and helium.

Since the volume is constant, we can use the ratio of their times of effusion.

Let's assume the molar mass of methane (CH4) is M1 and the molar mass of helium (He) is M2. According to Graham's law, the ratio of the effusion times is given by:

(time for methane) / (time for helium) = √(M2 / M1)

Given that the time for methane is 48 s, we need to find the time for helium. Rearranging the equation, we have:

(time for helium) = (time for methane) / √(M2 / M1)

By substituting the molar masses of methane (16.04 g/mol) and helium (4.00 g/mol), we can calculate:

(time for helium) = 48 s / √(4.00 g/mol / 16.04 g/mol)

(time for helium) = 48 s / √(0.25)

(time for helium) = 48 s / 0.5

(time for helium) = 96 s

Therefore, the time required for the same volume of helium to pass through the hole is approximately 96 seconds.

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Answer:

866000

Explanation:

because one kilometer (km) = 1000000 millimeters (mm)

The significance of the Ronald Cotton case, that a person can be convicted without individual evidence. Therefore, option D is correct.

Evidence is something or information used to increase or decrease the likelihood that a fact exists. Evidence can be testimony, written materials, visual or audio recordings, DNA samples, or other physical artifacts.

In essence, evidence is utilized to support a claim made by people or organizations who think something is real or a fact. Evidence may also be used to debunk or dispute a fact or claim that others don't agree with or believe to be incorrect.

Thus, option D is correct.

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Answer:

The theoretical yield of carbonic acid is 1.24 grams.

Explanation:

The balanced equation for the formation of carbonic acid by the reaction of carbon dioxide with water is:

CO₂ + H₂O → H₂CO₃

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of reactant and product participate:

An ideal gas is characterized by three state variables: absolute pressure (P), volume (V), and absolute temperature (T). The relationship between them constitutes the ideal gas law, an equation that relates the three variables if the amount of substance, number of moles n, remains constant and where R is the molar constant of the gases:

P * V = n * R * T

Moles of carbon dioxide can be calculated using ideal gas law equation. In this case:

Replacing:

1 atm* 0.495 L= n* 0.082 \(\frac{atm*L}{mol*K}\) *298 K

Solving:

\(n=\frac{1 atm*0.495 L}{0.082\frac{atm*L}{mol*K}*298 K }\)

n= 0.02 moles

Then, by reaction stoichiometry 0.02 moles of carbon dioxide produces 0.02 moles of carbonic acid.

Since the molar mass of carbonic acid is 62.03 g/mol, then you can apply the following rule of three: if there are 62.03 grams in 1 mole, how much mass is there in 0.02 moles?

\(mass=\frac{0.02 moles*62.03 grams}{1 mole}\)

mass= 1.24 grams

The theoretical yield of carbonic acid is 1.24 grams.

Answer:

second one is answer

To calculate the volume percent of dioxane we will apply the following formula:

In this case, the solute will be dioxane, and the volume will be 69.3 mL.

To calculate the volume of solution we will sum both volumes:

Volume of solution = Volume of dioxane + Volume of Toluene

Volume of solution = 69.3 mL + 1300 mL

Volume of solution = 1369.3 mL

We are given all the data with a significant digit, therefore we must report the result also with a significant digit. So the answer will be.

The volume percent of dioxane in the solution is 5.1 %(v/v)

The atom that has two unpaired electrons is boron (B).

The correct answer is (b) B (boron).

Boron (B) has two unpaired electrons. It has an electron configuration of 1s² 2s² 2p¹. The 2p orbital of boron contains three electrons, with two of them being unpaired.

Let's analyze the other options:

(a) He (helium) has an electron configuration of 1s², and all its electrons are paired, so it does not have any unpaired electrons.

(c) Ca (calcium) has an electron configuration of [Ar] 4s², meaning it has two paired electrons in the 4s orbital. There are no unpaired electrons in calcium.

(d) Se (selenium) has an electron configuration of [Ar] 3d¹⁰ 4s² 4p⁴. All of its electrons are paired, so it does not have any unpaired electrons.

(e) Zn (zinc) has an electron configuration of [Ar] 3d¹⁰ 4s². All of its electrons are paired, so it also does not have any unpaired electrons.

Therefore, the atom that has two unpaired electrons is boron (B).

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Answer:

you have to answer about what Emmy Noether was known for and how she accomplished her goal! For example Dr. Martin Luther King was known for his peaceful protests and his famous "I Have a Dream". He accomplished this goal by never giving up and sticking to his morals! I hope this helped!! ♡♡ (BTW love your profile picture)

Bohr's model lacked orbitals again for electrons or the electron cloud, contrary to Dalton's theory, which was founded on the idea that every element is made up of its own distinct variety of an indivisible atom.

According to the theory, an atom contains a small, dense, positive charge centre known as the nucleus, where practically every bit of mass was concentrated. Light, particles with negative charges called electrons then orbit far from the nucleus in a manner similar to how planets circle the Sun.

Dalton proposed his atomic hypothesis based on all of his observations. It's frequently called the billiards ball model. Due to the lack of understanding of the atomic electrons and the nucleus at the time, he described an atom as a ball-like structure.

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Answer:

B.)Schrodinger's model

Explanation:

The balanced molecular chemical equation for the reaction between potassium bromide (KBr) and calcium chloride (CaCl2) is: 2KBr(aq) + CaCl2(aq) -> 2KCl(aq) + CaBr2(aq).

To balance the equation, we need to ensure that the number of atoms of each element is the same on both sides of the reaction arrow.

Given: KBr(aq) + CaCl2(aq) ->

The number of potassium (K) atoms on the left side is 1, while there are 2 chlorine (Cl) atoms on the right side due to CaCl2. To balance the K atoms, we need to add a coefficient of 2 in front of KBr: 2KBr(aq) + CaCl2(aq) ->

Now, the number of potassium (K) and chlorine (Cl) atoms is balanced.

Next, we look at the bromine (Br) and calcium (Ca) atoms. There is 2 bromine (Br) atoms on the left side and 1 calcium (Ca) atom on the right side. To balance the Br atoms, we need to add a coefficient of 2 in front of CaBr2: 2KBr(aq) + CaCl2(aq) -> 2KCl(aq) + CaBr2(aq)

Now, the equation is balanced with respect to the number of atoms on both sides.

The balanced molecular chemical equation for the reaction between potassium bromide (KBr) and calcium chloride (CaCl2) is: 2KBr(aq) + CaCl2(aq) -> 2KCl(aq) + CaBr2(aq).

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70 g of a solid solute is added to 50 g of water at 20 °c, and it all dissolves. when additional solute is added, it does not dissolve. KI is the solute.

What is solute ?

A solute is a substance that has dissolved in a solution. Molecules of the solvent often outnumber those of the solute in a fluid solution. In our daily lives, salt and water are two of the most prevalent solutes. Salt becomes a solute when it is dissolved in water.

What is solvent?

Solvents are employed to dissolve the substances that serve as the formulation's solutes. The components of these solutes can be solids, liquids, or gases. The use of a suitable solvent in conjunction with the solute is required to create a solution.

given: 70g of solute is added to 50g of water at 20degree C

solution: at 20degree C,

since graph is for 100g of water

multiple by 2

2 x 50g of water=100g of water

similarly 2 x 70g of solute= 140g of solute

at 20degree C, The solute KI falls at 140g

Therefore , KI is the solute

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The final volume of the solution would be 1200 mL when a 500.0 mL solution of 2.40 M KCl is diluted to 1.00 M as dilution involves adjusting the concentration by adding a solvent (usually water) while keeping the number of moles constant.

M₁V₁ = M₂V₂

Where: M₁ = initial concentration, V₁ = initial volume ,M₂ = final concentration, V₂ = final volume

In this case, 

M₁ = 2.40 M (initial concentration), V₁ = 500.0 mL (initial volume) ,M₂ = 1.00 M (final concentration) ,V₂ = ? (final volume)

M₁V₁ = M₂V₂

(2.40 M)(500.0 mL) = (1.00 M)(V₂)

Now, for V₂:

V₂ = (2.40 M)(500.0 mL) / (1.00 M)

V₂ = 1200 mL

The final volume of the solution would be 1200 mL 

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