Substances have internal energy due to the constant, random motion of their particles. This is a kind of kinetic energy that differs depending on the substance's state of matter. Arrange the states of matter in order of increasing kinetic energy. liquid gas

A 250 mL buffer solution with a concentration of 0.370 M ammonium bromide and 0.366 M ammonia is handed to us.

Ammonia (\(NH_{3}\)), the weak acid in this buffer, and ammonium (\(NH^{+} _{4}\)), its conjugate base. Ammonia has a pKa of 9.24. The buffer solution combines with 0.0318 moles of hydrochloric acid (HCl) to produce \(NH^{+} _{4}\) and Cl-. Calculations are made to determine the new concentration of NH4+ in the solution:

\([NH^{+}_{4} ]new =[NH^{+}_{4} ]initial + [HCl]\)

\([NH^{+}_{4} ]new = 0.370 M + (0.0318 mol / 0.25 L)\)

\([NHx=^{+}_{4} ]new = 0.497 M\)

As all of the \(NH_{3}\) has interacted with HCl, its concentration has now been reduced to zero.

We may determine the pH of the resulting solution by using the Henderson-Hasselbalch equation:

\(pH = pKa + log([NH_{3} ]/[NH^{+}_{4} ])\)

pH = 9.24 + log(0/0.497)

pH = 9.24 - infinity

pH = 2.76

Therefore, the pH of the resulting solution is 2.76.

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Answer:

4

Explanation: it's a carbon atom right....soo it'll form 4 bonds(single)

An atom can form 4 single covalent bonds is carbon with two electron shell.

The bonds are defined as a strong bond that binds atoms, ions, or molecules together and promotes the production of molecules.

There are three types of bonds.

Covalent bonds are defined as the bond formed by sharing of electrons with each other.

Covalent bonding is a stable equilibrium of the attractive and repulsive forces between two atoms that occurs when they share electrons. Bonding pairs or sharing pairs are other names for these electron pairs.

It can also be defined as a type of chemical link where atoms share electrons to create electron pairs.

Covalent bonds  has low melting point, boiling point, enthalpy of fusion and enthalpy of vaporization.

Thus, an atom can form 4 single covalent bonds is carbon with two electron shell.

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The amount 43.23 grams of water will be formed.

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Answer: D Because it is moving at a fast pace

Explanation:

Answer:

when a cold metallic is put in a water bath with cold water than the laws of thermodynamics and calorimetry suggests that both the solid and the liquid will engage in heat exchange until they attain equilibrium.

once they both are at equal temperature, no heat transfer will continue and the bodies will just stat in a packed atmosphere.

The butterfly's larval stage is characterized by the following statement: "The larva is generating new limbs as well as wings, transitioning into an adult."

After birth as well as hatching and before reaching adulthood, many animals go through the larval stage of development, sometimes known as larvae or larvas.

Thus, the butterfly's larval stage is characterized by the following statement: "The larva is generating new limbs as well as wings, transitioning into an adult."

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Answer:

B

Explanation:

because HCl donates a proton to water. Therefore, HCl is an acid. H2O accepts a proton from HCl. Therefore, H2O is a base.

Answer:

About 5.8 trillion miles is equal to 1 light year

so (5,878,600,000,000 miles)*(1.21 light-years) = 7,113,106,000,000 miles

The total mass of sodium chloride is 58.44 g/mol.

The mass of sodium is 22.99 g/mol.

To find the percent sodium in sodium chloride can be found by dividing the amounts.

Therefore, the percent sodium is 39%.

Answer:

An aquifer is a layer of porous substrate that contains and transmits groundwater. ... The upper level of this saturated layer of an unconfined aquifer is called the water table or phreatic surface. Below the water table, where in general all pore spaces are saturated with water, is the phreatic zone.

Matter are anything that is made up of atoms. The quantity of matter can be observed only on the basis of mass and volume calculation. Thus, water table is the top layer of groundwater.

Matter is a substance that has some mass and can occupy some volume. The matter is mainly used in science. Matter can be solid, liquid or gas.

Matter is anything that is made up of atoms. Anything around us that can be physically seen and touched are matter. Ice, water and water vapors are example of matter.

Mass can also be represented as number of molecules. We also saw that matter occupy some volume and that volume is measured only in liter. An aquifers is a permeable layer of soil that stores and transports groundwater. The water level or phreatic surface is the top floor of the saturated layer of such an aquifer system. Water table is the top layer of groundwater.

Thus, water table is the top layer of groundwater.

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Answer:

the answer is

191 mL

hope this will help you ❤️

The bright line spectra is a physical property of an element because it occurs in the physical appearance of an element.

A bright line spectrum is formed when a light beam passes through an analyte sample where some wavelengths of the light are absorbed by the atoms present in the sample which leads to attaining the excited state of the electrons in those atoms. As the excited electron returns to the ground state, the energy that was absorbed is released in the form of discrete lines of light. Spectral lines are formed by the transitions of electrons within atoms. As the electrons move closer to the nucleus or farther from the nucleus of an atom, energy in the form of light is emitted or absorbed. A continuous spectrum comprises lights of all wavelengths within a certain range whereas a line spectrum only consists of a few wavelengths.

So we can conclude that due to the occurrence in the physical appearance of an element, the bright line spectra are considered as a physical property of an element.

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1.0608 mol/L is the concentration of the compound measured using UV/Vis spectrophotometer.

The equation for the Beer-Lambert Law has the following structure:

A=E×b×c

Where b is the sample's route length, E is the molar absorptivity, A is absorbance, and c is the compound's concentration in solution.

In question: E is 0.296 m- 1cm-1. A is .314 and path length is 1.00 cm.

By adding values in formula the answer is 1.0608 mol/L.

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The total bond energy of the reactants and products must be subtracted to obtain the energy change in the reaction \(2H_2O --- > 2H_2 + O_2\) using the provided bond energy.

Reactants:

2H-O-H (2 molecules) = 2 * (2 * O-H) = 2 * (2 * 463 kJ/mol) = 1852 kJ/mol

Products:

2H-H (2 molecules) = 2 * (2 * H-H) = 2 * (2 * 436 kJ/mol) = 1744 kJ/mol

O=O = 1 * O=O = 1 * 495 kJ/mol = 495 kJ/mol

1852 kJ/mol is the total binding energy of the reactants.

The combined binding energy of the products is 1744 kJ/mol + 495 kJ/mol, which is equal to 2239 kJ/mol.

Energy change (ΔE) = Total bond energy of the products - Total bond energy of the reactants

ΔE = 2239 kJ/mol - 1852 kJ/mol = 387 kJ/mol

So, the answer is E.

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Your question is incomplete, most probably the complete question is:

Calculate the energy change of the following reaction

based on the bond energies given.

2H2O2H2 + O2

H-H: 436kJ/mol

O=0: 495kJ/mol

O-H: 463kJ/mol

Select one:

A gas under constant pressure will expand when heated.

The temperature is the degree of hotness or coldness of the object.

According to the ideal gas law.

pV= nRT

where, p = pressure. V = volume, n =moles of elements, R =universal gas constant and T =temperature.

When pressure is kept constant, volume is directly proportional to the temperature.

When temperature is increased or an object is heated, the volume also increases i.e expands.

Thus, a gas under constant pressure will expand when heated.

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Answer:

B. A possible explanation for why something happens.

Explanation:

By the process of elimination, it's none of the others but B.

Answer:

mmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm

Explanation:

nnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn

Answer:

bleaching powder is actually a mixture of calcium chloride, calcium hydroxide and calcium hypochlorite. hence it is not a single salt. It is not completely soluble in water as it composed of heavy calcium salts, which are known to be insoluble in water.

Answer:

It does disolve

Explanation:

It depends on how much bleaching powder you're trying to dissolve in water

Answer: 55,000

Explanation:

Scientific Notation: 5.5 x 10⁴

Standard form: move the decimal 4 places to the right

                         5 5 0 0 0 0.

                      =  55,000

Answer:

5.72×10^2

Explanation:

5.5×104

=55×104

=5720÷10

=572

=5.72×10^2

The total interaction energy in units of eV/atom assuming λ = 4156 eV and R_0/rho = 12 is 150N eV/atom.

Given Potential for two inert gas (Xe) atoms at separation R :

U=λe^(-R/rho)-R^6/a^6

a) To calculate the potential energy of the two atoms at equilibrium separation R_0,

we have to put dU/dR = 0λ e^(-R_0/rho) = (6R_0^6)/(a^6)λ e^(-R_0/rho) = (6(12rho)^6)/(a^6)

Therefore, λ = (6(12rho)^6)/(a^6) * e^(12)

The potential energy can be expressed as, U=λe^(-R_0/rho) = ((6(12rho)^6)/(a^6)) * e^(12) * e^(-12rho/rho)= ((6*12^6)/a^6) * e^(-11rho)

b) Given R_0 = 12rho, λ = (6(12rho)^6)/(a^6) * e^(12)

Therefore, λ = (6(12rho)^6)/(a^6) * e^(12) = (6 * 12^6)/(a^6) * e^(12) * e^(-12) = (6 * 12^6)/(a^6)

Potential energy U = λe^(-R_0/rho) = (6 * 12^6)/(a^6) * e^(-11rho)c)

The total interaction energy in units of eV/ atom assuming λ = 4156 eV and R_0/rho = 12

Therefore, λ = (6(12rho)^6)/(a^6) * e^(12) = (6 * 12^6)/(a^6) * e^(12) * e^(-12) = (6 * 12^6)/(a^6)

Total energy (U) = (N/2)U = (N/2)λe^(-R_0/rho) = (N/2)(6 * 12^6)/(a^6) * e^(-11rho) = 150N eV/atom.

Therefore, the total interaction energy in units of eV/atom assuming λ = 4156 eV and R_0/rho = 12 is 150N eV/atom.

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Metals have a crystalline in nature, and a consistent shift in stress causes the structure to alter, causing the metal to stiffen and fracture. This is known as metal fatige. The bending causes that to occur.

A metal is a substance that has a shiny look when freshly processed, polished, or shattered, and conducts electricity and heat rather effectively. Generally speaking, metals are malleable and ductile.

These characteristics are the outcome of the metallic link that exists between the metal's atoms or molecules.

The earth's crust is where most pure metals are found. They are discovered in ores, which are solid materials from which metals and minerals may be extracted. The majority of the planet's iron mass, which makes up over a third of its mass, is located in its core.

Thus, Metals have a crystalline in nature, and a consistent shift in stress causes the structure to alter.

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Answer: A

Explanation:in learned this last year:)

A: The number of crickets in each container. and

C: The number of cricket chirps.

are possibly the right answers

The correct classification for both calcium (Ca) and iron (Fe) is:

D) Ca is an alkaline earth element and a metal, and Fe is a transition element and a metal.

Calcium (Ca) belongs to the alkaline earth metals group, which is located in Group 2 of the periodic table. Alkaline earth metals are characterized by their reactivity, high melting points, and tendency to form 2+ cations. Therefore, Ca is classified as an alkaline earth element and a metal.

Iron (Fe) is a transition element, also known as a transition metal. Transition metals are located in the d-block of the periodic table and are characterized by their ability to form multiple oxidation states and exhibit variable valencies. Fe is classified as a transition element and a metal due to its properties and location in the periodic table.

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the temperature at which the rate constant is 4.75 s^-1, we can use the Arrhenius equation:k = Ae^(-Ea/RT)

Where:k is the rate constantA is the pre-exponential factorEa is the activation energyR is the gas constant (8.314 J/(mol*K) T is the temperature in Kelvin We are given the rate constant at one temperature (80 K)

Let's solve for T:T = (100,000 J) / (8.314 J/(mol*K) * ln(4.75 s^-1 / A)Since we don't have the value for A, we can't calculate the exact temperature. The pre-exponential factor (A) is typically given or can be determined experimentally.

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the temperature at which the rate constant will be 4.75 s^-1 is 403 K (rounded to the nearest integer).

To determine the temperature at which the rate constant will be 4.75 s^-1, we can use the Arrhenius equation, which relates the rate constant (k) to the activation energy (Ea) and the temperature (T).

The Arrhenius equation is given as:

k = A * e^(-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.

We are given the activation energy (Ea) as 100,000 J and the rate constant (k) at 80 K as 0.425 s^-1.

To find the temperature at which the rate constant is 4.75 s^-1, we can rearrange the equation as follows:

T = (-Ea)/(R * ln(k/A))

Substituting the given values, we have:

T = (-100,000 J) / (8.314 J/mol·K * ln(4.75/0.425 s^-1))

Calculating this, we find that T is approximately 403 K.

Therefore, the temperature at which the rate constant will be 4.75 s^-1 is 403 K (rounded to the nearest integer).

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Answer: NOT a base

Explanation: i just took the exam and got this one wrong but i donno the correct answer between the last 3 good luck bb

Answer:

A catalyst

Explanation:

Catalysts make reaction faster and speed up the reaction time.

You are experiencing post-traumatic stress disorder (PTSD) due to the critical stress experienced during the incident.

Post-traumatic stress disorder (PTSD) is a psychological condition that can develop after a person experiences or witnesses a traumatic event. In this scenario, witnessing the roof collapse on a coworker and being trapped under a section of the roof would be considered a traumatic event. The symptoms mentioned, such as replaying the event and experiencing distressing thoughts, are characteristic of PTSD. PTSD can also involve flashbacks, nightmares, hypervigilance, and avoidance of triggers associated with the traumatic event. It is important to seek professional help if you are experiencing symptoms of PTSD, as therapy and support can be effective in managing and recovering from the condition.

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The gram-formula mass of the product in the given reaction is 201.8g.

Gram Formula mass is the atomic mass of one mole of an element or a molecular compound, or an ionic compound.

To calculate the gram formula mass of a compound, the following applies;

According to this question, propene reacts with bromine to produce bromo propane with the molecular formula; C₃H₆Br₂.

Gram formula mass = 12(3) + 1(6) + 79.9(2) = 201.8g

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