ip the electron in a hydrogen atom with an energy of -0.544 ev is in a subshell with 18 states. part a what is the principal quantum number, n, for this atom?

Answer:

The total number of atoms in this chemical formula

C8H3 NaBr 12

8+3+1+12=24

Answer:

i belive the answer is A if it's not i am very sorry

suppose mol of electrons must be transported from one side of an electrochemical cell to another in minutes. the size of electric current that must flow is   104.54 A.

Suppose 650 mmol of electrons must be transported from one side of an electro chemical cell to another in 10.0 minutes Then, we have to calculate the size of electric current that must flow. Then we know that Current I = Charge(q) / time(t), Charge = mols of e-x charge of electron = (0.650 mol of e-) x (96500 C/mol of e-) = 62725 C. now, time in seconds t = 10 min = 10 min x 60 s/ min = 600 s therefore, I = C/t = (62725)/600

| = 104.54 C/s, Also, 1 C/s = 1 Amp. Hence, I = 104.54 A. A torrent of particles, such as ions or electrons travelling through an electrically conducting or a vacuum is called as an electric current. The net rate of electric charge passing throughout a surface or through a control volume is how it is determined. Electric current is a term that refers to how so much electricity to flow across a circuit and how it flows in an electronic circuit. Amperes are employed to measure it (A). More and more electricity going through the circuit, the greater the ampere value.

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Answer:The atoms in gases are far apart from each other, so they are much more disordered than either liquids or solids.

Explanation:

Answer:

The gas under pressure subjected to heat can cause the tank to explode. A scuba tank filled to capacity with compressed air at 3000 psi could just as easily go up to 3400-3500 psi if heated

Explanation:

Air molecules are free to move and as more air is added to the tank, the molecules move and collide faster which raises the temperature. Hence option D is correct.

Pressure is defined as the force applied perpendicularly to an object's surface divided by the surface area over which it is applied. The movement of the molecules and the collisions they have with one another and the vessel walls cause the pressure to build up. According to general relativity theory, pressure contributes to the mass-energy cause of gravity by making a gravitational field stronger.

The tank may blow up if the gas within was under pressure and exposed to heat. If heated, the pressure of a scuba tank filled to capacity with compressed air at 3000 psi may readily increase to 3400-3500 psi. Because air molecules are free to move, the temperature in the tank rises as more air is introduced, as the molecules move and collide more quickly.

Thus, air molecules are free to move and as more air is added to the tank, the molecules move and collide faster which raises the temperature. Hence option D is correct.

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A homogeneous mixture, also known as a solution, is created when two or more components are combined to produce a combination. The solute and the solvent are the two substances that are combined.

The material that is being dissolved is known as the solute, whereas the substance that dissolves the solute is known as the solvent.

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Answer:

(m1+m2)v

Explanation:

where m1 is the mass of the first body

m2 is the mass of the second body

v is the velocity

Answer:

The same genes or slightly different versions of the same gene can be found on each chromosome in a pair. They form a line and split off bits of themselves, which they barter with one another. In sexual reproduction, crossing over is the first method that genes are shuffled to develop genetic variation.

Answer:

where a cold air mass is replacing a warmer air mass. ... The air behind a cold front is noticeably colder and drier than the air ahead of it. When a cold front passes through, temperatures can drop more than 15 degrees within the first hour.

Explanation:

The effects from a cold front can last from hours to days. The air behind the front is cooler than the air it is replacing and the warm air is forced to rise, so it cools. As the cooler air cannot hold as much moisture as warm air, clouds form and rain occurs.

Answer: ignitable gases, such as propane and butane.

Explanation:

That propellant may have hazardous characteristics such as being flammable (spray paint and lubricating sprays) and/or toxic (e.g. chlorinated solvent sprays or cleaning products). Most propellants in spray cans are mixtures of ignitable gases, such as propane and butane.

Answer:

-1464 kJ/mol

Explanation:

The balanced equation for the reaction is given as;

C2H4(g)+3O2(g)→2CO2(g)+2H2O(l) ΔH∘1=?

The enthalpy of the reaction is given by the equation;

Enthalpy of reaction = Enthalpy of products - Enthalpy of reactants

Products:

2CO2(g)+2H2O(l)

Enthalpy of Products = 2 (−394) + 2(−286)

Enthalpy of Products = -1360 kJ/mol

Reactants:

C2H4(g)+3O2(g)

Enthalpy of Reactants = 2 (52) + 3(0)

Enthalpy of Reactants = 104 kJ/mol

Enthalpy of Reaction =  -1360 - 104 = -1464 kJ/mol

If the observed rotation of a solution of 1.2 g of a compound in 10 ml of water is -6.9 degrees then the specific rotation of the compound is -57.5 degrees / (g·dm/mL)

The specific rotation of a compound is defined as the observed rotation of a solution of 1 g of the compound in 1 mL of solvent, with a path length of 1 dm (or 10 cm).

In this case, we have:

Mass of the compound (m) = 1.2 g

Volume of the solvent (V) = 10 mL = 0.01 L

Path length (l) = 10 cm = 0.1 dm

Observed rotation (α) = -6.9 degrees

To calculate the specific rotation ([α]), we can use the following formula:

\([\alpha] = \frac{\alpha}{(c * l)}\)

Where c is the concentration of the solution in g/mL. We can calculate the concentration as follows:

\(c = \frac{m}{V}\)

\(c = \frac{1.2}{0.01}\)

c = 120 g/L

Now we can put the values into the formula to get:

\([\alpha] = \frac{-6.9}{(120*0.1)}\) degrees / (g*dm/mL)

[α] = -57.5 degrees / (g*dm/mL)

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Answer:

Soap is an excellent cleanser because of its ability to act as an emulsifying agent. An emulsifier is capable of dispersing one liquid into another immiscible liquid. This means that while oil (which attracts dirt) doesn't naturally mix with water, soap can suspend oil/dirt in such a way that it can be removed.

Soap acts as a cleaner because of its ability to act as an emulsifying agent. A soap molecule has a polar head and a nonpolar tail. Soap consists of a carbon chain where one end attracts oil and the other attracts water.  

Most of dirt can be described as oily in nature as oil does not dissolve in water. The molecule of soap consists of sodium salts of long-chain carboxylic acids. In soaps, the chain of carbon atoms dissolves in the oil, and the ionic or polar end of the soap molecule dissolves in water.

The soap molecules produce structures known as micelles. In micelles, one end faces the oil droplet, and the other end which is ionic in nature faces outside. Therefore, soap can form an emulsion in water and supports in dissolving the dirt when we wash our clothes.

Soap can be described as a kind of molecule in which both ends have different properties. The hydrophilic end dissolves water and is attracted to it whereas the hydrophobic end is dissolved in hydrocarbons and is water repulsive in nature.

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An ionic compound is a type of chemical compound that is composed of two ions held together by electrostatic forces.

A chemical compound is a combination of two or more elements that are chemically bonded together in a specific ratio. Chemical compounds are formed when the atoms of different elements are joined together through chemical bonds, which are formed when at least one atom gives or shares one or more electrons with another atom.

The two ions, a cation and an anion, are usually a metal and a non-metal. The cation carries a positive charge and the anion carries a negative charge. For example, in the ionic compound NaCl, the cation is sodium (Na+) and the anion is chloride (Cl-). In CrCl4, the cation is chromium (Cr4+) and the anion is chloride (Cl-). In NH,Br, the cation is nitrogen (NH+) and the anion is bromide (Br-). In Cu(OH)2, the cation is copper (Cu2+) and the anion is hydroxide (OH-).

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The pH of the solution is 1.954. The pH scale ranges from 0 to 14, with 7 being neutral.

The pH of a solution is defined as the negative logarithm (base 10) of the concentration of hydrogen ions (H+) in the solution. Since HNO3 is a strong acid, it is almost completely dissociated in water, so the concentration of H+ ions in the solution is equal to the concentration of HNO3.

We first need to determine the concentration of nitric acid (HNO3) that has formed from the reaction of NO2 with water.

The molar mass of NO2 is 46.006 g/mol, so the number of moles of NO2 dissolved in 1.00 L of water is

4.18 mg / 46.006 g/mol = 0.0910 mol.

Since the reaction between NO2 and water is:

NO2 (aq) + H2O(l) → HNO3 (aq) + NO(g)

The number of moles of HNO3 formed is equal to the number of moles of NO2 present, which is 0.0910 mol.

So, the concentration of HNO3 is 0.0910 mol / 1.00 L = 0.0910 M.

pH = -log(0.0910) =1.954

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Answer:

≈15

Explanation:

1.43-.96=.57

.57/1.43 (change / original) * 25 ≈ 9.96

25 - 9.96 ≈ 15

So the correct option is B. Price variance. Price variance term describes difference between actual price of inputs and the standard price of inputs.

Price variance refers to the difference between the actual price paid for inputs and the standard price set for those inputs. It is a measure of the discrepancy between the expected or budgeted cost or actual cost of acquiring materials, goods, services. Price variance helps in evaluating the effectiveness of procurement activities and assessing the impact of price fluctuations on overall costs. A favorable price variance indicates that inputs were obtained at a lower cost than expected, while an unfavorable price variance suggests higher costs than anticipated.

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The correct statement is;

The wavelength of a photon emitted by the electron jumping from level 2 to level 1 6 is given by λ=hc/ΔE. Option A

The electrons are grouped in distinct energy levels or shells encircling the atomic nucleus, according to the Bohr model of the atom. An integer value, commonly represented by the letters K, L, M, N, and so forth, is used to identify each energy level. The K shell is the innermost and has the lowest energy level of all the energy levels, which are arranged in ascending order of energy.

The movement of the electron from one energy level to the other would give the wavelength of the photon produced as  λ=hc/ΔE.

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When a car driver puts their foot on the brake pedal, the brake fluid is pushed down a narrow tube connected to the brake. Since brake fluid is hard to squash, the brakes are put on immediately the scientific term for squash is compressibility.

The scientific term for squash is "compressibility". In the case of brake fluid, it has very low compressibility, which means that it cannot be easily compressed or squashed, resulting in immediate and effective brake application when pressure is applied to the brake pedal.

The term "compressibility" describes how much a particular volume of matter shrinks under pressure. A solid or a liquid under pressure essentially maintains its volume. The solid or liquid's constituent atoms, ions, or molecules are in close proximity to one another.

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Answer:

  802.69 g

Explanation:

The molar mass of Barium nitrite is 229.34 g/mol, so 3.5 moles of it will have a mass of ...

  3.5 mol × 229.34 g/mol = 802.69 g

Answer: to protect giant pandas

Explanation:

A hipaa-mandated electronic transaction for claims may also be called an EDI (Electronic Data Interchange) transaction. EDI allows healthcare providers and insurance companies to exchange claims information electronically while maintaining HIPAA compliance and data security. This streamlined process helps to reduce errors and administrative costs associated with paper claims processing.
A HIPAA-mandated electronic transaction for claims may also be called an Electronic Data Interchange (EDI) transaction. EDI transactions allow healthcare providers to submit claims electronically in a standardized format, ensuring secure and efficient data exchange while maintaining HIPAA compliance.

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The molar solubility of magnesium hydroxide in water is approximately 2.27×10⁻⁴ mol/L.

To find the molar solubility of magnesium hydroxide (Mg(OH)₂), we need to determine the concentration of Mg²⁺ and OH⁻ ions in a saturated solution.

The balanced equation for the dissociation of magnesium hydroxide is:

Mg(OH)₂(s) ⇌ Mg²⁺(aq) + 2OH⁻(aq)

Let's assume the molar solubility of Mg(OH)₂ is "x" mol/L.

The solubility product constant, Ksp, is given as 1.2×10⁻¹¹, and it represents the equilibrium expression for the dissociation of Mg(OH)₂:

Ksp = [Mg²⁺][OH⁻]²

Since Mg(OH)₂ dissociates to form one Mg²⁺ ion and two OH⁻ ions, we can express the equilibrium concentrations as:

[Mg²⁺] = x mol/L

[OH⁻] = 2x mol/L

Substituting these values into the Ksp expression:

Ksp = (x)(2x)² = 4x³

Given that Ksp = 1.2×10⁻¹¹, we can set up the equation:

4x³ = 1.2×10⁻¹¹

x = ∛(1.2×10⁻¹¹/4)

x ≈ 2.27×10⁻⁴ mol/L

Therefore, the molar solubility of magnesium hydroxide in water, as determined by the Ksp value, is approximately 2.27×10⁻⁴ mol/L.

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The time required for a reaction to reach equilibrium can depend on the value of Kc, which represents the equilibrium constant. The equilibrium constant, Kc, is determined by the concentrations of the reactants and products at equilibrium.

In general, reactions with a larger Kc value tend to reach equilibrium more quickly than those with a smaller Kc value. This is because a larger Kc indicates that the concentration of products is higher compared to the concentration of reactants at equilibrium. As a result, the reaction proceeds more rapidly to reach the point where the ratio of products to reactants matches the value of Kc.

Therefore, among the given options, the answer would be option (c) where Kc is a very large number. In this case, the reaction would require the least amount of time to reach equilibrium.

It's important to note that the actual time required for a reaction to reach equilibrium depends on various factors such as temperature, pressure, and the presence of catalysts. Additionally, the time required for a reaction to reach equilibrium cannot be determined solely based on the value of Kc. However, in general, a larger Kc value suggests a quicker attainment of equilibrium.

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The ability of molecules to stick to each other is called "adhesion''. Adhesion refers to the tendency of two different substances to stick or bond to each other.

This interaction is driven by various forces such as hydrogen bonding, van der Waals forces, and ionic bonding, among others. Adhesion is an important property in many areas of science and technology, including materials science, surface chemistry, and biology. For example, adhesion plays a crucial role in the functioning of biological systems, such as in the attachment of cells to surfaces or the formation of bonds between proteins. In materials science, adhesion is used to create strong bonds between different materials, such as in the production of adhesives, coatings, and composites.

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Answer: I think probaly wrong so probaly dont

listen to me

Explanation:

The efficacy of alcohol, specifically ethanol, as a temporary treatment for poisoning with ethylene glycol can be explained by its ability to competitively inhibit the metabolism of ethylene glycol in the liver.

Ethylene glycol is a toxic substance found in certain automotive antifreeze and coolant products. When ingested, it is metabolized in the liver by alcohol dehydrogenase, an enzyme that normally breaks down ethanol.

However, ethanol has a higher affinity for alcohol dehydrogenase than ethylene glycol. By administering ethanol as a treatment, it saturates the enzyme, effectively blocking the metabolism of ethylene glycol.

This competitive inhibition allows for the excretion of ethylene glycol through urine without its conversion into more toxic metabolites, such as glycolic acid and oxalic acid.

The presence of ethanol in the bloodstream ensures that alcohol dehydrogenase is primarily focused on metabolizing ethanol rather than ethylene glycol, reducing the toxic effects of ethylene glycol poisoning.

It's important to note that while ethanol can be used as a temporary treatment for ethylene glycol poisoning, it is not a definitive antidote. Prompt medical attention and appropriate medical treatments, such as dialysis and administration of fomepizole or 4-methylpyrazole, are essential for managing ethylene glycol poisoning effectively.

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