at the boiling point, the density of the liquid is 809 g/l and that of the gas is 4.566 g/l. how many liters of liquid nitrogen are produced when 658.0 l of nitrogen gas is liquefied at 77.36 k?

The largest value of n that can be reached considering conservation of energy when a 12.3 eV electron collides with a hydrogen atom at rest in its ground state, exciting the electron to a higher energy level is n= 2.

When a hydrogen atom is excited, it absorbs a photon and one of the electrons goes to a higher energy level. When an electron in an excited atom returns to a lower energy state, it releases a photon with a specific wavelength.

The energy absorbed by the hydrogen atom when it is excited is given by:ΔE = Ei - Efwhere Ei is the energy of the initial state, and Ef is the energy of the final state.In this situation, the electron has an energy of 12.3 eV, which is greater than the ionization energy of the hydrogen atom (13.6 eV).

As a result, the hydrogen atom cannot be ionized, but the electron can be excited to a higher energy level using this energy. The maximum value of n that can be reached with this energy can be determined by equating the energy of the initial state to the sum of the ionization energy and the energy of the final state.

The energy difference can be computed as follows:ΔE = Ei - Ef= 12.3 eV - 10.2 eV= 2.1 eVwhere Ef is the final state energy, which corresponds to the energy of the nth state of the hydrogen atom.

When we solve for n, we get:

n² = ΔE/13.6 eV= 2.1 eV/13.6 eV= 0.154n = √(0.154)= 0.392

Therefore, the maximum value of n that can be reached is n= 2 (i.e., the second energy level).

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Answer:

Star is a cycles two

Sana maka tolong

The statement that correctly describes the boiling point of alcohols is option D which is alcohol boiling point are higher than that of their parent molecules.

Boiling point of alcohol explained.

Alcohol is  indeed capable of forming hydrogen bonds which can significantly affect its boiling point. Hydrogen bonding occurs between the oxygen atom of one alcohol molecule and the hydrogen atom of another. These intermolecular forces are stronger than the typical London dispersion forces found in nonpolar molecules.

Due to the presence of hydrogen bonding, alcohols generally have higher boiling points compared to nonpolar compounds of similar molecular weight.

Compared to their parent molecules, alcohol have higher boiling points .

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Answer:

3.39 mol

Explanation:

n = m/M, where n is moles, m is mass and M is molar mass.

n = 149/44.01

n = 3.38559418314 mol

n = 3.39 mol

Hope that helps

The chemical reaction that we observe with the change in absorbance measured by the spectrophotometer is the oxidation of guaiacol by hydrogen peroxide (H2O2).

This chemical reaction is related to the activity of turnip peroxidase in that it is catalyzed by this enzyme. Turnip peroxidase is an enzyme that catalyzes the oxidation of a wide range of substrates, including guaiacol. Guaiacol, in particular, is a colorless compound that, upon oxidation, turns brown in the presence of peroxidase.Turnip peroxidase catalyzes the oxidation of H2O2 in the presence of guaiacol, resulting in the formation of a brown-colored product. This reaction results in a change in absorbance that can be measured using a spectrophotometer. Thus, the activity of turnip peroxidase is related to the rate of the oxidation of guaiacol by H2O2.

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The value of both the activation energy in the Arrhenius equation incorporates a collision frequency and molecule orientation (Eact). The right response is C) Eact.

A formula describing the temperature dependence in reaction rates is the Arrhenius equation. The preexponential factor multiplied by the activation energy exponential, divided by the result of the molar gas constants and the temperature, gives the first-order rate constant.

k = Ae(-Eact/RT), where k is really the equilibrium concentration, R is the heat capacity, T the temperature, as Well as a is the or before component, is the formula for the Arrhenius equation. The least amount of energy required to be delivered toward the reactant molecules for the a chemical reaction to take place is known as the activation energy, and it takes into account how collision frequency and molecule orientation affect the reaction rate. Therefore, C) Eact is the right response.

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Answer:

-4.59°C

Explanation:

Let's see the formula for freezing point depression.

ΔT = Kf . m . i

ΔT = Freezing T° of pure solvent - Freezing T° of solution

Kf = Freezing constant. For water if 1.86°C/m

m = molality (moles of solute in 1kg of solvent)

i = Van't Hoff factor.

0°C - Freezing T° of solution = 1.86°C /m . 1.30m . 1.9

Freezing T° of solution = - (1.86°C /m . 1.30m . 1.9)

Freezing T° of solution = - (1.86°C/m .  1.30m . 1.9) → -4.59°C

NaCl →  Na⁺  +  Cl⁻

Answer:

2, 4, and 5

Explanation:

have a nice day:)

Answer:

2, 4, and 5

Explanation:

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please give me Brainlest

Answer:



Explanation:

To determine the number of moles of Fe2O3 that can be formed by reacting 3.2 moles of iron (Fe), we need to first write and balance the chemical equation for the reaction between iron and oxygen (O2) to form Fe2O3:

4Fe + 3O2 → 2Fe2O3

From the balanced equation, we see that 4 moles of Fe react with 3 moles of O2 to produce 2 moles of Fe2O3. This means that the mole ratio of Fe to Fe2O3 is 4:2, or simply 2:1.

To find the number of moles of Fe2O3 formed from 3.2 moles of Fe, we can use the mole ratio from the balanced equation:

moles of Fe2O3 = 2/4 x 3.2 moles

moles of Fe2O3 = 1.6 moles

Therefore, 1.6 moles of Fe2O3 can be formed by reacting 3.2 moles of iron.

Answer:

Explanation:

Causes of Greenhouse Effect

Answer:OH^- ion

Explanation: When LiOH added in water then LiOH dissociated in Li+ and OH- . Water is a composition of H+ and OH- ions hence concentration of OH- ions will be increased after adding LiOH.

The substances that cannot be broken down into simpler substances by ordinary means are called elements.

Elements are the fundamental building blocks of matter. They are pure substances composed of only one type of atom. Each element is characterized by its unique atomic number, which represents the number of protons in the nucleus of its atoms.

Elements are organized in the periodic table based on their atomic number and grouped according to their similar properties.

There are currently 118 known elements, ranging from hydrogen (the lightest element) to oganesson (the heaviest element). Each element has its own unique set of chemical and physical properties, such as boiling point, melting point, density, and reactivity.

Some elements are naturally abundant, while others are extremely rare and may only exist in trace amounts.

Elements combine with each other to form compounds through chemical reactions. Compounds are composed of two or more different elements chemically bonded together in specific ratios. The combination of different elements and their arrangements give rise to the vast diversity of substances found in the natural world.

Understanding the properties and behavior of elements is crucial in various scientific fields, such as chemistry, physics, and materials science. By studying the elements and their interactions, scientists have been able to unlock the secrets of matter and develop technologies that have revolutionized our world.

In summary, elements are the basic substances that cannot be broken down into simpler substances by ordinary means. They are the foundation of all matter and provide the diversity and complexity observed in the universe.

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Answer:

left

Explanation:

Metals are to the left of the line (excluding hydrogen, which is a nonmetal), nonmetals are to the right of the line, and metalloids are to the immediate right of the line.

(Hope this helps can I pls have brainlist (crown)☺️)

Lead is a naturally occurring metal found in the environment as well as manufactured in products. The major source of this metal has historically been fuels in on-road motor vehicles such as cars and trucks, and industrial sources.

Both naturally occurring in the environment and used in manufactured goods are the metal lead. In the past, industrial sources and fuels used in on-road motor vehicles (such as cars and trucks) have been the main sources of lead emissions. Lead emissions from the transportation industry rapidly reduced by 95% between 1980 and 1999 thanks to regulatory measures in the U.S. to remove lead from gasoline for on-road motor vehicles, while lead levels in the air decreased by 94% over the same period. The areas closest to lead smelters typically have the greatest airborne lead concentrations today. Today, the processing of ores and metals as well as piston-engine aircraft using leaded aviation gasoline are the main sources of lead emissions into the atmosphere.

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Answer:

7.5mL of the stock solution

Explanation:

A stock solution is a concentrated solution that is used to make another more diluted solution.

In the problem, the RFC solution is 20% (v/v). That means contains 20mL of RFC in 100mL of solution.

Yo need to prepare 50.0mL of a 3.0% (v/v), solution (3mL of RFC in 100mL of solution). That means you need:

50.0mL solution × (3mL RFC / 100mL solution) = 1.5mL of RFC. These RFC must come from the stock solution

As your stock solution contains 20mL of RFC per 100mL of solution, you will need:

1.5mL RFC × (100mL stock / 20mL RFC) =

The inhibition of DHFR will have an immediate impact on the production of deoxythymidine monophosphate (dTMP) (dihydrofolate reductase).

Dihydrofolate reductase (DHFR) is an enzyme that catalyses the transformation of dihydrofolate (DHF) to tetrahydrofolate (THF), a vital co-factor necessary for the manufacture of purines and thymidine, which are fundamental components for DNA synthesis. The inhibition of DHFR will have a direct impact on the production of deoxythymidine monophosphate (dTMP), the precursor of the thymine nucleotide in DNA. This is because DHFR is a crucial enzyme in the thymidine synthesis pathway since it converts DHF to THF, which is required for the formation of dTMP through a series of enzymatic processes.

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Answer:

The only one I know is NaC2HO4.

There is Sodium, Carbon, Hydrogen and Oxygen.

1 atom in sodium, 2 atoms in carbon, 1 atom in hydrogen and 4 atoms in oxygen completeting the total of 8 atoms in this element.

The elements are the simplest chemical forms and they cannot be broken down through chemical reactions. There are many elements in the given formulas.

The elements are defined as those substances whose atoms all have the same number of protons. The elements are considered as the building blocks of matter. Each element has an atomic number and a symbol.

Each atom is regarded as an element. The elements create bonds to form molecules. The isotopes are the elements with the same atomic number but different mass numbers.

NaC₂HO₄  - 'N' , 'C', 'H','O'

H₂F₅BLi - 'H','F','B','Li'

He₂PSO₄ - 'He', 'P','S','O'

He₂O₄PH - 'He', 'O','P','H'

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The neutral atoms of all of the isotopes of the same element have:

C) the same number of electrons

Isotopes are atoms of the same element that have different numbers of neutrons in their nuclei, but the same number of protons. This means that isotopes have the same atomic number, which determines the element to which they belong, but different mass numbers.

The other answers are incorrect for the following reasons.

a. This is incorrect because all atoms of the same element have the same number of protons.

b. This is incorrect because isotopes of the same element have different numbers of neutrons. The definition of isotopes is atoms of the same element having different numbers of neutrons.

c. This is incorrect because the mass numbers of the different isotopes will differ. The mass number is the sum of the protons and neutrons in the nucleus of an atom. Since isotopes of the same element have different numbers of neutrons, the mass numbers will differ.

d. This is incorrect because the mass of the different isotopes will differ. Neutrons have mass. Therefore, atoms that have different numbers of neutrons will have different masses.

Therefore, The neutral atoms of all of the isotopes of the same element have:

C) the same number of electrons

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Answer:

this is nice..... cool

Explanation:

If a carbohydrate, like xylulose, has five carbon atoms and a carbonyl group on the second carbon, it is called a(n) keto pentose.

These consist of glycogen, cellulose, as well as starch. Benedict's reagent can be used as a test to see if there are lots of simple carbohydrates present. When it interacts with lowering sugars, it changes from turquoise to yellow or orange. These contain unbound aldehyde but rather ketone groups in simple carbohydrates.

Sugars and starches are examples of carbohydrates. They contain carbon, hydrogen, and oxygen, which appear in the ratio 1:2:1. Size-based categories for carbohydrates include monosaccharides, disaccharides, or polysaccharides. Carbohydrates act as sources of power as their main purpose.

Therefore, If a carbohydrate, like xylulose, has five carbon atoms and a carbonyl group on the second carbon, it is called a(n) keto pentose.

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Answer:

erm-- how do i answer this question xd

Explanation:

Gaining of an electron is most exothermic for Fluorine.

N2(g)+O2(g)→2NO(g) is an endothermic response because heat is absorbed on this reaction. all of the other reactions are exothermic as the warmth is launched for the duration of the method.

Any manner that absorbs warmness from its environment is an endothermic system. consequently, all endothermic reactions are endothermic strategies. An endothermic reaction is any chemical response that absorbs warmth from its surroundings. The absorbed electricity provides the activation electricity for the reaction to arise.

Fluorine is important for the manufacturing of nuclear material for nuclear power vegetation and for the insulation of electrical towers. Hydrogen fluoride, a compound of fluorine, is used to etch glass. Fluorine, like Teflon, is used to make plastics and is also essential in dental fitness.

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Answer

The theoretical Van't Hoff factor i for C12H22O11 is 1

Explanation

The Van't Hoff factor, i, is the number of particles formed in a solution from one formula unit of solute.

The Van't Hoff factor, i, is a property of the solute. In an ideal solution, i does not depend on the concentration of the solution.

For a nonelectrolyte, like (C12H22O11), which does not separate into ions in solution, Van''t Hoff factor, i = 1 because 1 molecule of sucrose (C12H22O11) forms only one particle in solution.f

The solution's new concentration can be calculated to be 0.0147 M.

The dilution formula is used to calculate the concentration of a solution after dilution based on the initial concentration and the dilution factor. The dilution factor is defined as the ratio of the final volume to the initial volume.

The formula for dilution is

C1V1 = C2V2

where C2 is the solution's final concentration, V2 is the solution's final volume after dilution, C1 is the solution's original concentration, and V1 is its starting volume.

employing the dilution formula;

0.1176 * 30 = x * 240

x = 0.0147 M

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Mass percentage =

\(\frac{mass \: of \: element}{mass \: of \: the \: compound} \times 100\)

\(o = \frac{16g}{18g} \times 100 \\ = 88.9\%\)

H =

\(\frac{2g}{18g} \times 100 \\ = 11.1\%\)

organic molecules

because organic molecules does not dissociate in water

Answer:

B

Explanation:

Answer: According to Boyle's Law, if the temperature remains constant, doubling the pressure will halve the volume of the gas.

Explanation:

Answer:

its for use full

Answer:

Explanation:

Gymnastics

Answer: Gymnastics