An s sublevel is represented by the quantum number

Explanation:

Systems which occur in the nature on their own are known as natural system. On the other hand, systems which are made by human beings are known as human-made systems.

Therefore, classifying given systems as follows.

Natural systems are:

Human-made system are:

Answer:

1.79*10^-14

Explanation:

A quick easy way I do is find the pH which is .253-14 = -13.747

and put it as the exponent for 10.

10^-13.747=1.79*10^-14

The formula mass of a compound is calculated by adding the atomic masses of each atom in its formula according to their quantities. For instance, for H2S2 it's (2*1.0) + (2*32.1) equals 66.2 amu, and for HFO2 it's (1*1.0) + (1*19.0) + (2*16.0) equals 52.0 amu.

To calculate the formula mass of H2S2 and HFO2, one must first understand the atomic masses of each element involved from the periodic table. Indeed, the formula mass is the sum of the atomic masses of each atom in the compound formula. Therefore,

For H2S2, you find the atomic masses for Hydrogen (H) and Sulfur (S). The atomic mass of hydrogen is approximately 1.0 and sulfur is around 32.1. Given the compound has 2 atoms of hydrogen and 2 atoms of sulfur, we obtain:  (2*1.0) + (2*32.1) = 66.2 amu.

For HFO2, you find the atomic masses for Hydrogen (H), Fluorine (F), and Oxygen (O). Atomic mass of Hydrogen is 1.0, Fluorine is 19.0, and Oxygen is 16.0. Thus, we calculate: (1*1.0) + (1*19.0) + (2*16.0) = 52.0 amu.

Remember to keep at least one decimal place in the atomic masses during your calculations. This will improve the accuracy of your result.

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Final answer:

To find the heat absorbed by the dissolution of 2.8 moles of NH4NO3, multiply the amount of substance by its molar heat of solution, yielding 71.96 kJ.

Explanation:

To calculate the amount of heat absorbed when 2.8 moles of NH4NO3 are dissolved in water, you multiply the number of moles by the molar heat of solution. The molar heat of solution for NH4NO3 is 25.7 kJ/mol.

The calculation is as follows:

Therefore, the dissolution of 2.8 moles of NH4NO3 in water absorbs 71.96 kJ of heat.

When 2.8 mol NH₄NH₃ is dissolved in water, 71.96 kJ of heat is absorbed.

To determine how much heat is absorbed when 2.8 mol NH₄NH₃ is dissolved in water, use the given molar heat of solution.

Dissolution Process:

NH₄NH₃ (s) → NH4⁺ (aq) + NO₃⁻ (aq)

The molar heat of solution for NH₄NH₃ is 25.7 kJ/mol.

Hence, 71.96 kJ of heat is absorbed when 2.8 mol of NH₄NH₃ is dissolved in water.

Answer:

Exothermic

Explanation:

From the perspective of thermodynamics, chemical reactions can be broadly

classified as endothermic and exothermic reactions.

Endothermic reactions are accompanied by the absorption of heat and have a negative value for the reaction enthalpy i.e. ΔH is negative. In contrast, exothermic reactions are accompanied by the release of heat and have a positive value for the reaction enthalpy i.e. ΔH is positive.

The given reaction is:

[tex]N2(g) + 3H2(g)---- 2NH3(g) + 100.4 kJ[/tex]

Based on the above reaction, production of NH3 is accompanied by the release of 100.4 kJ of heat, hence this is an exothermic reaction.

the distance north of south of the equator .thats the answer

Answer:

7.56 moles

Explanation:

For a 742 kPa, we can consider the gas as an ideal gas because it will be close to 7 atm (1 kPa = 0.01 atm), which is low pressure. So, the ideal gas equation is:

PV = nRT

Where P is the pressure, V is the volume, n the number of moles, R the gas constant and T the temperature (always in Kelvin). For pressure in kPa and volume in liters, R = 8.314 kPa.L/mol.K, then:

742x25 = nx8.314x295

2452.63n = 18550

n = 18550/2452.63

n = 7.56 moles

If two cars get a 4 way stop intersection at the same time, the car on the right should be yielded the right of way. This is known as the "right-of-way rule."

The right-of-way rule is a traffic law that determines which vehicle has the right to proceed first at an intersection.

-When two vehicles arrive at a 4-way stop intersection at the same time, the vehicle on the right has the right of way and should proceed first.

-If the two vehicles arrive at the same time and are facing each other, the vehicle going straight has the right of way over the vehicle turning left.

The right-of-way rule is important for safety reasons. It helps to prevent accidents and reduce traffic congestion by providing a clear and consistent way to determine which vehicle has the right to proceed first.

Therefore, the car on the right should be yielded the right of way.

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Final answer:

Propane's complete combustion reaction with oxygen producing carbon dioxide and water is a chemical process, representing a typical exothermic combustion reaction used for heat generation.

Explanation:

The combustion of propane (C3H8) in the presence of oxygen (O2) to produce carbon dioxide (CO2) and water vapor (H2O) is a chemical reaction that involves the breaking and forming of chemical bonds.

The balanced chemical equation for this reaction is:

The balanced chemical equation for the complete combustion of propane is C3H8 + 5O2 → 3CO2 + 4H2O. This reaction is exothermic, releasing heat energy which is why propane is commonly used as a fuel source.

Answer: Electrical and Thermal.

Explanation:

Answer:

B. The ionization energy increases because the ratio of the protons to electrons increases.

Explanation:

edg 2021

The answer is: B. Matter can be divided into two groups; pure substances and mixtures.

Pure substance is made of only one type of atom or only one type of molecule, it has definite and constant composition with distinct chemical properties.

For example, aluminium is an element and ammonia is compound.

Mixtures are physical combinations of pure substances that have no definite or constant composition.

Final answer:

To find the new pressure in psig, we can use Boyle's Law, which states that the pressure and volume of a gas are inversely proportional at constant temperature. The new pressure would be 12 psig.

Explanation:

To determine the new pressure in psig, we can use Boyle's Law, which states that the pressure and volume of a gas are inversely proportional at constant temperature.

Boyle's Law can be represented by the equation: P1V1 = P2V2, where P1 and V1 are the initial pressure and volume, and P2 and V2 are the final pressure and volume.

Using this equation, we can rewrite it as:

P1/P2 = V2/V1

Substituting the given values into the equation, we have:

10 psig/P2 = 25 ft3/30 ft3

Solving for P2, we find:

P2 = (10 psig)(30 ft3)/25 ft3 = 12 psig

Answer:cool slowly beneath Earths surface

Explanation:

Answer:

cool slowly beneath Earth's surface

Explanation:

Answer:

The correct answer is unit cell.

Explanation:

Unit cell

Smallest unit of a crystal with fixed arrangement of atoms or ions. And this geometrical arrangement of atoms is responsible for shape of crystal and symmetry possessed by the crystal. Repetition of these unit cells in a space forms crystal.

The repeating subunits that are responsible for the shape of a crystal are

known as Unit cells.

These are solids whose components are arranged in a highly ordered

microscopic structure thereby forming  lattice structure.

The unit cells known as atoms in a repeated manner are responsible for

the formation and shape of the crystal.

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Answer:

Zn + Ag+ → Zn2+ + Ag

Explanation:

Plato

The statement of the redox reactions is spontaneous as "[tex]Zn + Ag^{+}[/tex]→ [tex]Zn^{2+} + Ag[/tex] ".

A redox reaction is the process in which electrons are exchanged between two reactants that are involved. The oxidation number of a molecule, atom, or ion varies as a result of gaining or losing an electron.

If the standard electrode potential for the redox reaction, [tex]E^{0}[/tex], is positive, the redox reaction is spontaneous. That means, the reaction will move forward if [tex]E^{0}[/tex] is positive. In this reaction, silver ion is the oxidizing agent that readily accepts the electron to attain (stable configuration) the metal state, while Zn is a reducing agent which loses electrons (i.e., oxidized) by causing a reduction. It proceeds with[tex]E^{0}[/tex] redox reaction as given, the reaction moves forward and is considered to be spontaneous.

Hence the correct answer is [tex]Zn + Ag^{+}[/tex] → [tex]Zn^{2+} + Ag[/tex].

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The new volume of the gas can be calculated using Boyle's law of gases. The volume of the gas when pressure drops from 90 kpa to 20 kpa, increases from 4 L to 18 L.

Boyle's law states that, at constant temperature, the volume of a gas is inversely proportional to the pressure of the gas.

hence, PV = a constant.

Let P1 and V1 be the initial pressure and volume and P2 and V2 be the final pressure and volume, then

P1 V1 = P2V2.

Given that,

P1 = 90 kPa

P2 = 20 kPa

V1 = 4 L

V2 = P1 V1/P2

     = (90kPa  × 4 L)/20 kPa

     = 18 L.

Therefore, the final volume of the gas will be 18 L.

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Answer:

16.56 g

Explanation:

Mass is the production of Volume and Density.

m = V. d = 6 × 2.76 = 16.56 g

Answer:

it is an organ it is a structure containing at least 3 different types of tissue that works together for a common purpose

Basically, the higher the percentage of the active ingredient in a drug, the more quickly it will reach the blood stream.

For example, when making a tablets, the active and the inactive ingredients are mixed together to form small grains and compressed into tablets. How quickly the drug reach the bloodstream depends on the type and amount of addictive in the drug, and the degree of compression.  

The drug is the active ingredients while the addictive is the inactive ingredients. The chemical substances consumed in order to produce a desired effect is the active ingredients and the addictive such as stabilizers, diluents, lubricants are mixed together with the drug so that the drugs can be swallowed easily. The inactive ingredients also help in the breaking down of the drug in the gastrointestinal tract.

Drug absorption refers to the movement of drug into the bloodstream and how quickly it will reach its intended site depends on several factors.

Some of the factors include:

However, Drug dosage can be in a form of capsules, a tablet, solution or transdermal patch. It is made up of the drug and addictive.  

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KEYWORDS:

Basically, a drug will enter the blood stream more quickly the larger the amount of the active ingredient is.

Drugs are defined as any chemical that, when taken, alters the physiology or psychology of an organism. They might affect how your brain works, as well as your emotions, conduct, comprehension, and senses.They are therefore erratic and harmful, particularly for children. Drug effects vary depending on the user and the substance.

The active components of the drug are different from the inactive components that make it addictive. The addictive substances such as stabilizers, diluents, and lubricants are combined with the medicine to make it easier to swallow, while the active ingredients are ingested to create the intended effect. The drug's breakdown in the digestive system is also aided by the inactive components.

Thus, basically, a drug will enter the blood stream more quickly the larger the amount of the active ingredient is.

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To neutralize a 50.0-mL sample of a 1.50 M NaOH solution with a 2.90 M HCl solution, you need 25.86 mL of HCl. Thus, the final volume of the solution when the NaOH has been completely neutralized by the HCl is 75.86 mL.

First, you need to calculate the amount (moles) of NaOH in your original solution. To do this, multiply the volume of your solution (in liters) by the molarity. This yields (50.0 mL / 1000 mL/L) x 1.50 mol/L = 0.075 mol NaOH.

Next, use the balanced neutralization reaction between HCl and NaOH:

HCl (aq) + NaOH (aq) → H2O (l) + NaCl (aq)

From this reaction, we can see that one mole of HCl reacts with one mole of NaOH to produce one mole of water and one mole of sodium chloride.

Given that you have 0.075 moles of NaOH, you will need an equivalent amount of HCl for neutralization. Knowing the concentration of your HCl solution (2.9 M), calculate the volume of HCl required using the formula:

Volume = moles / molarity = 0.075 mol / 2.90 mol/L = 0.02586 L or 25.86 mL of HCl.

The final volume of the solution is ultimately the sum of the original NaOH solution volume and the volume of HCl titrant added: 50.0 mL + 25.86 mL = 75.86 mL.

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