Calculate the pH during the titration of 30.00 mL of 0.1000 M KOH with 0.1000 M HBr solution after the following additions of acid:(b) 15.00 mL

If excess ammonium sulfate reacts with 20.0g of calcium hydroxide then liters of ammonia are produced at STP 0.081L

Ammonium sulphate is the organic solvent and the primary use of ammonium sulphate is as a fertilizer for alkaline soils

Here given reaction is

(NH₄)₂SO₄ + Ca(OH)₂ → CaSO₄ + NH₃ + H₂O

Here given data is

Calcium hydroxide  = 20.0g

We have to find liters of ammonia are produced at STP =?

20.0g of (NH₄)₂SO₄ STP = ?

Then 20.0g of (NH₄)₂SO₄×1 mol/132g×0.54L/1 mol = 0.081L

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The law of mass action best fits that the law of mass action is a model that emphasizes the energy and orientation of molecular collisions to explain and predict reaction kinetics.

The relationship between concentrations of reactants and products in a chemical reaction at equilibrium is described by the law of mass action, which is a fundamental concept in chemistry. According to this, the rate of a chemical reaction is inversely related to the product of the reactant concentrations, where each reactant concentration is increased to a power equal to its coefficient in the balanced chemical equation.

This rule also serves as the foundation for a kinetic model that forecasts the speeds of chemical reactions by taking into account the energy and orientation of molecular collisions. It aids in the explanation of how temperature, concentration, and other variables affect response speeds.

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Answer:

Buffer solutions are essential in regulating blood acidity because they help maintain a stable pH level in the body. The pH of blood needs to be tightly controlled within a narrow range of 7.35 to 7.45 for optimal physiological functioning. Buffers work by absorbing excess hydrogen ions (H+) or hydroxide ions (OH-) that may be introduced into the bloodstream from various metabolic reactions. For example, if the blood becomes too acidic due to an increase in H+ ions, buffer systems such as the bicarbonate-carbonic acid system can neutralize the excess H+ ions and restore the pH balance. Conversely, if the blood becomes too alkaline due to an increase in OH- ions, buffer systems can absorb the excess OH- ions and bring the pH back to normal. In this way, buffer solutions help maintain the delicate acid-base balance crucial to the proper functioning of our bodies.

In TCD exam from the transforaminal window. The vessel which are insonating is 80 mm. Vessel which are sampling here is the middle cerebral artery (MCA).

A transcranial Doppler (TCD) exam uses a transforaminal window near the base of the skull to sample blood flow in intracranial vessels. The middle cerebral artery (MCA) is the largest intracranial vessel, measuring approximately 80 mm in diameter. As a result, when you perform a TCD exam through the transforaminal window, you are usually sampling the middle cerebral artery.

The MCA is a major blood vessel that supplies blood to the brain and is located on the lateral (side) side of the brain. The MCA's diameter can vary, but a diameter of 80 mm would be extremely large and unusual for this vessel.

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In consideration of Henry's law the molar mass of organic compound is 0.24 grams.

What is molar mass?

The molar mass of a chemical compound defined as the mass of a sample of that compound devided by the amount of substance which is the number of moles in that sample,measured in moles.

Sol-One of three asks what the mass of water is in grams and two and 1/2 liters of paper of Equis, 12.5% sodium chloride, 55 degrees Celsius. His problem tells us that pure water is 118 tour at 55 degrees Celsius. So the first thing that we have to do here is figure out wth e um, the mole fraction of thermal fractions, I suppose, of both sodium chloride and water.

We're dividing by molecular way to be trippy substances, uh, studying chloride being 58.44 grams per mole and water being 18.2 grand's for mole. That gets a 0.214 molds of sodium chloride and 4.86 months off water. So it can take both of these, uh, numbers of moles then and plug them into the, um, the pressure equation given and chapter 13 here. So the pressure of the solution is equal to the mole fraction of the solvent, which is here, water multiplied by the pressure of pure sullivan given to us in the problem.

We know those 2.5 liters. We're looking for this number of moles here. Ideal gas constant 0.8 to 6 leader atmospheres over mole Calvin. And then we have to convert, um, Celsius, the 55 degrees Celsius to Calvin. So remember that simply 55 degrees Celsius plus two year and 73 which gets US 328 Calvin. So solving all of that for the number of moles, then that gives us 0.133 off water and 2.5 liters of vapor. So last step, then, is to just convert that to Graham's, since the problem asks for a mass and not number moles. So you can plug that, um, basically into, uh, the molecular weight of water, just 18.2 grand's for mold. And that gives us keeping significant figures in mind. 0.24 grams.

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Answer:

which of the following formulas represent a covalent molecule?

A)CaS

B)Co2

C)Na2O

D)FeCl3

Answer:

purppurppurppurppurppurp

Answer:

Hydrochloride acid + Zinc = Zinc Chloride + Hydrogen

Explanation:

When Hydrochloride acid and Zinc react, it results in the formation of Zinc chloride and hydrogen.

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Answer:

The answer is

210.6+14.57=225.17mm.

Answer:

Explanation:

0.15 MG +1.15 MG +2.051 MG

Answer:

109.5

Explanation:

It's a tetrahedreal with four bonds

Answer:

it have been already balanced

2H2 + O2 = 2H2O.

Answer: A light bulb in the same room at the same temperature.

Explanation: Yw, BYE!!!

Answer:

it is a result of hydrogen bonds present within water molecules.

Explanation:

when the water is transformed to ice at zero degrees Celsius, the water molecules are in crystal lattice in a structure that has a lot of empty space around each molecule.

Answer:

by determining or looking up the electron configurations of the main group elements.

Explanation:

The valence electrons participate in chemical reactions. ... You can also find the core and valence electrons by determining or looking up the electron configurations of the main group elements.

The rays that are mutagens are ultraviolet (UV) light and X-rays. Mutagens are substances or types of radiation, such as ultraviolet (UV) light or X-rays.

That result in permanent and inherited alterations (mutations). Deoxyribonucleic acid is found in the genetic material of cells (DNA). What makes UV light mutagens. DNA alterations aren't always caused directly by UV exposure. Longer than X-rays but shorter than visible light, ultraviolet (UV) radiation has a wavelength ranging from 10 nanometers (with a corresponding frequency of about 30 PHz) to 400 nanometers (750 THz). mutagens classified as physical, chemical, and biological agents. The first mutagenic agent discovered in 1920 was radiation. Other ionizing and non-ionizing radiations, including neutrons, alpha rays, X-rays, and UV rays, are also mutagenic.

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The amount of 38Sr90 produced from a nuclear reactor accident that will take half  lifetime to dissipate is 99.9778%.

The half-life of a reaction is the length of time required for the reactant concentration to decrease to half its initial value. A first-order reaction's half-life is a constant that is correlated with its rate constant: t1/2 = 0.693/k.

A radioactive element's half-life is the amount of time it takes for it to decay to half of its original value. It can be concluded from this that a source's activity has a half-life if it takes some time before it drops to half its starting value.

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Answer:

below on my bule

Explanation:bule

Answer:

Pure substances are further broken down into elements and compounds. Mixtures are physically combined structures that can be separated into their original components. A chemical substance is composed of one type of atom or molecule.

Explanation:

Answer:

A pure substance is made up of only one kind of particle. Mixtures are made up of pure substances combined together. A mixture is composed of at least two different kinds of particles.

Explanation:

Answer:

Include:

--Dot structures do not show the distribution of electrons in orbitals and take up a lot of space.

--Arrow and line diagrams take up a lot of space and make it difficult to count electrons.

--Written configurations make it easy to lose count of electrons and do not show the distribution of electrons in orbitals.

I Hope This Helps You!

Answer:

Dot structures do not show the distribution of electrons in orbitals and take up a lot of space.

Arrow and line diagrams take up a lot of space and make it difficult to count electrons.

Written configurations make it easy to lose count of electrons and do not show the distribution of electrons in orbitals.

Explanation:

edge.

(a) If one of the reaction products was the then unknown neutron, what was the other product is the C -12.

(b) The q-value of this reaction is the 5.9 × 10⁸ J.

The James Chadwick was discovered the neutron during the experiment involving the nuclear reaction in that the beryllium, bombarded with the alpha particles. The equation of the reaction is as :

⁴Be₉  +  ²He₄  ---->  ⁶C₁₂  +  ⁰n₁

(a) If one of the reaction products was the then unknown neutron, what was the other product is the C -12.

(b) The q-value of this reaction is as :

q = mc²

Where,

The m is the mass

The c is the speed of the light.

m = 4.002603 + 2.014102

m = 1.988501

q = 1.988501  × 3 × 10⁸

q = 5.9 × 10⁸ J

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The answer is 0.017110756386119. We assume you are converting between moles NaCl and gram. You can view more details on each measurement unit: This compound is also known as Sodium Chloride. The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles NaCl, or 58.44277 grams.

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According to the stoichiometry of the given chemical equation, 1.45 g of Cl₂ are needed to produce 2.4 grams of NaCl.

Stoichiometry is the determination of proportions of elements or compounds in a chemical reaction. The related relations are based on law of conservation of mass and law of combining weights and volumes.

Stoichiometry is used in quantitative analysis for measuring concentrations of substances present in the sample.

According to the given chemical equation, 70.906 g of chlorine gives 117 g sodium chloride, thus, 2.4 g of sodium chloride will be produced, when 2.4×70.906/117= 1.45 g of Cl₂ reacts.

Thus, according to the stoichiometry of the given chemical equation, 1.45 g of Cl₂ are needed to produce 2.4 grams of NaCl.

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The cellular organelle that is most affected by CO poisoning is mitochondria (option B).

Mitochondria is a cellular organelle found in eukaryotic cells and responsible for the production of energy in form of ATP.

Carbon monoxide (CO) is a common environmental pollutant released when fossil fuels are burned. The major target of this pollutant is the mitochondria.

Carbon monoxide (CO) binds to cytochrome oxidase of the electron transport chain in the mitochondria, thereby, blocking oxidative phosphorylation and ATP production. As ATP declines, there is no energy to drive the breathing muscles.

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Answer:leeeeeee

Explanation:

First, we calculate the moles of each element taking the percentages as a mass:

We divided the number of moles by the smaller number of moles. In this case, C is the smallest:

These numbers give us the empirical formula wich is: CH2

The pH at the beginning of the titration is 1 so the pH after adding 20.0 mL of NaOH is 1.70 after adding 50.0 mL of NaOH is 2.21, and after adding 60.0 mL of NaOH is 2.40 and The pH at the equivalence point is 7.

In this titration, a strong base, NaOH, is added to a weak acid, HCl, to determine its concentration.

At the beginning of the titration, the pH is determined by the dissociation of the weak acid, which makes the solution acidic with a pH of 1. As NaOH is added, it reacts with HCl in a 1:1 ratio to form water and salt. This reaction neutralizes the acidic solution and increases the pH.

At the equivalence point, all the HCl is neutralized, and the solution is neutral, giving a pH of 7. The pH curve obtained from this titration is a typical shape for an acid-base titration involving a weak acid and a strong base.

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Answer:

2.3g

Explanation: my mom is a teacher

CH₄ + 2O₂ → CO₂ + 2H₂O For this reaction the mass of methane gas (CH4) is required in order to follow the Law of Conservation of Mass is 2.3 gram. Therefore, option D is correct.

The Law of Conservation of Mass states that the total mass of the reactant is exactly equal to the total mass of the product.

It is also state that in a chemical reaction mass is neither created nor destroyed. For example, the carbon atom in coal gets carbon dioxide when it is burned.

This law is important in understanding and production of various chemical reactions. If researchers experience the identities alongside the quantities of the reactants for any particular reaction.

According to the Law of Conservation of Mass, In given combustion reaction to obey this law the mass of reactant is 2.3 grams.

Thus, option D is correct.

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Answer:B

Explanation:

Answer:

Both large loose rocks and the small loose rocks used to be apart of the earths solid rock layer.

Explanation:

The molarity of the alkali potassium hydroxide is 4.167 M.

Molarity (M) is the amount of a substance in a sure quantity of answers. Molarity is described because the moles of a solute according to liters of an answer. Molarity is also called the molar attention of an answer.

Calculation:-

V = 24 cm³ = 0.024 L

V = 20 cm³ = 0.020 L

molarity of sulphuric acid = 2.5

Mv = MV

M  0.024 = 0.02 × 2.5 × 2

M = 0.1 /0.024

    = 4.167 M

Molar concentration is a measure of the attention of a chemical species, specifically of a solute in an answer, in terms of the amount of substance in step with the unit extent of the answer. In chemistry, the most generally used unit for molarity is the number of moles in keeping with liter, having the unit symbol mol/L or mol/dm³ in SI unit.

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Answer:

Displacement Reaction

Explanation:

Zinc replaces lead in Lead(ll) nitrate as zinc is more reactive than lead.