How can you relieve stress?

Answer:

not a base

Explanation:

Answer:

pH = 14 - pOH

pH = -log[H+]

pH = pKa + log [A-]/[HA]

Explanation:

The equation used depends on what is given in the equation.

The expression that represent the pH of the solution is

pH = 14 - pOH

pH = -log[H+]

pH = pKa + log [A-]/[HA]

It is the quantitative measure related to the acidity or the other liquid solutions. It should be range between the 1 and 10^-14. here the numbers be like from 0 to 14.

Hence, we can say that The expression that represent the pH of the solution is

pH = 14 - pOH

pH = -log[H+]

pH = pKa + log [A-]/[HA]

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The given statement " William Aston created the mass spectrograph to analyze and separated them, found 218 and found mass and percent abundance of each atoms" is false.

The mass spectrograph was not invented by William Aston. It was actually invented by J.J. Thomson in the early 20th century.

J.J. Thomson's work with the mass spectrograph led to the discovery of isotopes, which are different forms of an element with the same number of protons but different numbers of neutrons. Isotopes have different masses, and the mass spectrograph allowed scientists to separate and analyze them based on their mass-to-charge ratio.

The process of using a mass spectrograph to determine the mass and percent abundance of isotopes is known as mass spectrometry. It involves ionizing a sample, separating the ions based on their mass-to-charge ratio, and detecting the ions to determine their abundance.

The completed question is given as,

State true or false

William Aston created the mass spectrograph to analyze and separated them, found 218 and found mass and percent abundance of each atoms.

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Answer:

A hypothesis is a claim you make about what you think is going to happen in an experiment.

Hope This Helps

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The historical order of atomic models from the earliest to the most recent is as: Hard sphere model, electron shell model, and wave mechanical model. Therefore, option (A) is correct.

The atomic model can be described as the model used to describe the structure and composition of the atom. The atom as a primary component of matter has been under extensive study to understand the universe.

In the classical model of an atom, the atom is made of smaller particles with an electrical charge called electrons, protons, and neutrons. To understand the atomic models, it is important to understand how these particles make up the atom.

There are five principal atomic models that have been proposed over time,  which are Dalton’s atomic model, Thomson’s atomic model, Rutherford’s atomic model, Bohr’s atomic model, and the quantum atomic model.

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Your question was incomple, most probably the complete question was,

Which group of atomic models is listed in historical order from the earliest to the most recent?

A)  Hard sphere model, electron shell model, and wave mechanical model

B)  Hard sphere model,  wave mechanical model, and electron shell model

C) Electron shell model, Hard sphere model, and wave mechanical model

D) Electron shell model, wave mechanical model, and  Hard sphere model

Answer:

it decrease when a solution becomes more acidic which means that decrease in pH means increase..

Answer:

it's ph decreases.. meaning those with a small ph value are more acidic.forinstance one with a ph of 1 is more acidic than the one with a ph of 3.

I hope this helps

The answer is Solution!

Explanation:

Solution is a homogeneous mixture

of two or more substance. In a

sugar solution, sugar gets uniformly

mixed with water

The ionic equation for dissolution and the solubility product (ksp) expression for each of the following slightly soluble ionic compounds.

(a) For PbCl2:
Dissolution: PbCl2 (s) → Pb²⁺ (aq) + 2Cl⁻ (aq)
Ionic equation: PbCl2 (s) ⇌ Pb²⁺ (aq) + 2Cl⁻ (aq)
Solubility product (Ksp) expression: Ksp = [Pb²⁺][Cl⁻]²

(b) For Ag2S:
Dissolution: Ag2S (s) → 2Ag⁺ (aq) + S²⁻ (aq)
Ionic equation: Ag2S (s) ⇌ 2Ag⁺ (aq) + S²⁻ (aq)
Solubility product (Ksp) expression: Ksp = [Ag⁺]²[S²⁻]

(c) For Sr3(PO4)2:
Dissolution: Sr3(PO4)2 (s) → 3Sr²⁺ (aq) + 2PO₄³⁻ (aq)
Ionic equation: Sr3(PO4)2 (s) ⇌ 3Sr²⁺ (aq) + 2PO₄³⁻ (aq)
Solubility product (Ksp) expression: Ksp = [Sr²⁺]³[PO₄³⁻]²

(d) For SrSO4:
Dissolution: SrSO4 (s) → Sr²⁺ (aq) + SO₄²⁻ (aq)
Ionic equation: SrSO4 (s) ⇌ Sr²⁺ (aq) + SO₄²⁻ (aq)
Solubility product (Ksp) expression: Ksp = [Sr²⁺][SO₄²⁻]

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Galvanic cells or voltaic cells can generate electricity through the use of a spontaneous reaction.

A galvanic cell or voltaic cell can be described as an electrochemical cell in which electricity is generated from spontaneous Oxidation-Reduction reactions.

A common apparatus consists of two different metals or electrodes, each immersed in different beakers containing their respective ion solution, They are connected by a salt bridge or a porous membrane.

Galvanic cells carry the spontaneous redox reactions but have been designed to harness the energy generated from the said reaction. The electromotive force of the cell can be defined as the difference between the half-cell potentials which are measured by the two electrodes in the electrolyte.

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neutron activation analysis for a sample of a rock revealed the presence of 140 56ba , which has a half-life of 12.5 days . assuming the isotope was freshly separated from its decay products, 13.4 ng is the mass of 140 56ba in a sample emitting 1.00 mci of radiation

radiation = 1.00 mCi, radiation = 1.00 x 10-3 Ci, radiation = 1.00 x 10-3 Ci * (3.7 x 1010 dps / 1 Ci), radiation = 3.7 x 107 dps, half life = 12.5 days, half life = 12.5 days * (24 hr / day) * (3600 s / hr), half life = 1.08 x 106 secondsdecay constant = 6.418 x 10-7 s-1number of disintegrations = 5.765 x 1013number of moles = 9.57 x 10-11 mol mass Ba-140 = (number of moles) * (molar mass Ba-140), mass Ba-140 = (9.57 x 10-11 mol) * (139.911 g/mol), mass Ba-140 = 1.34 x 10-8 g, mass Ba-140 = 13.4 ng   (where ng = nanogram). Isotopes are atoms and have the same amount of protons but different neutron numbers. They have nearly identical chemical properties but vary in mass and thus in physical properties. An isotope is one of two or more types of atoms of a chemical element that have the same number of protons and position in the periodic table as well as remarkably similar chemical actions but differ in atomic mass and physical properties. The term "daughter products" refers to decay products. They are radionuclides formed thru the nuclear reactions of parent radionuclides.

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Answer:15 +18

Explanation:15 fuel +18 oxygen + 33 cd

Oxygen gets oxidized and potassium and chlorine get reduced. The number of electrons moving to have a balanced reaction is 6.

The number of allocated elements in a chemical combination is termed an oxidation number. The oxidation number is generally the count of the number of electrons that a molecule or atom shares, loses, or gains during bond formation.

The given chemical equation will be

\(\rm 2K ^+ + 2Cl^+ + 2O_3^{2-} = 2KClO_3\)

In this reaction, oxygen gets oxidized and potassium and chlorine get reduced.

The number of electrons moving to have a balanced reaction will be

Number of electron = 2 × 3 = 6

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Answer:

Answer down below

Explanation:

The right response is d. Both enzymes will have the same ΔG for catalysis.

The reaction rate and equilibrium constant have an impact on the Gibbs free energy (ΔG). No matter the source of the enzyme, such as E. coli or a thermophilic microbe, the ΔG for a reaction is the same. As a result, both enzymes will have the same ΔG for sucrose hydrolysis.

The ΔG may be written mathematically as:

ΔG = -RT ln (K)

T is the temperature, K is the equilibrium constant, and R is the gas constant..

As both enzymes have the same reaction rate (K) and temperature (T), the reaction's ΔG  value will likewise be the same.

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The molality of the solution and the molar mass of the unknown compound is mathematically given as

Generally, the equation for the Molarity   is mathematically given as

M=dt/Kt

Therefore

M=2.5/1.86

M=1.34

Therefore

M=wt s/Mol of un*1000/gof solvent

mol of un =5*1000/1.34*25

149.25g/mol

In conclusion,  the molar mass of the unknown compound is

149.25g/mol

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Answer:

Long bones contain yellow bone marrow and red bone marrow, which produce blood cells.

Explanation:

Have a nice night!

The majority of your blood cells are produced in your bone marrow. This is known as haemopoiesis. In children, haemopoiesis occurs in the long bones, such as the thighbone (femur). Adults have it mostly in their spine (vertebrae), hips, ribs, skull, and breastbone (sternum).

Hematopoiesis is the process by which all the cellular components of blood and blood plasma are produced. It happens in the hematopoietic system, which includes organs and tissues like bone marrow, liver, and spleen. Simply put, hematopoiesis is the process by which the body produces blood cells.

The bone marrow is where blood cells are created. The soft, spongy material in the center of the bones is called bone marrow. It generates approximately 95% of the body's blood cells. The pelvic bones, breastbones, and spine bones contain the majority of the adult body's bone marrow.

Red cells are constantly produced in the marrow of certain bones. As previously stated, the marrow is the primary site of red cell production, known as erythropoiesis, in adults.

Thus, The majority of your blood cells are produced in your bone marrow. This is known as haemopoiesis.

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According to unit conversion, 11.9 mg of sodium should be consumed by an average adult according to the data.

Unit conversion is defined as a multi-step process which involves multiplication or a division operation by a numerical factor.The process of unit conversion requires selection of appropriate number of significant figures and the rounding off procedure.

It involves a conversion factor which is an expression for expressing the relationship between the two units.A conversion ratio always has value which equals to one which indicates that numerator and denominator have values which are expressed in different units.

7% of 170 that is 7/100×170=11.9 mg.Thus, 11.9 mg of sodium should be consumed by an average adult according to the data.

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When the electrons in an atom transition between energy levels, according to Bohr, an atomic spectrum is produced. When energy is absorbed, the electrons would leap to a greater energy level than they normally would, creating an excited and unstable condition. Electrons ordinarily have the lowest energy attainable.

The characteristic wavelengths of electromagnetic radiation (or a subset of it) that are released or absorbed by a material, atom, or molecule are known as a spectrum.

The term "spectrum" alludes to how various people experience autism in a variety of ways; autism is a condition that is highly diverse. Autism is seen as a spectrum disorder because each autistic person experiences it differently. Some autistic people may require more care than others in order to live the lifestyles they desire.

The sun's spectrum of colors, the rainbow, and a molecule's infrared absorption wavelengths are a few examples of spectra.

Continuous, emission, and absorption spectra are the many types.

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A physical change is a type of change in which the form of matter is altered but one substance is not transformed into another.

The dimensions or shape of matter may be changed, but no reaction occurs. Physical changes are usually reversible. Note that whether a process is reversible or not isn't truly a criterion for being a physical change.

Contrast this with a chemical process, during which chemical bonds are broken or formed so that the starting and ending materials are chemically different. Most chemical changes are irreversible. On the opposite hand, melting water into ice (and other phase changes) is often reversed.

Examples of physical changes include: Crumpling a sheet of paper (an exemplar of a reversible physical change)Breaking a pane of glass (the chemical composition of the glass remains the same)

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The ranking of bonds by increasing price volatility (duration) is as follows:

2) 4,2,1,3

This means that option 2 ranks the bonds in the correct order of increasing price volatility.

The duration of a bond measures its sensitivity to changes in interest rates. Generally, bonds with longer durations are more sensitive to interest rate changes and exhibit greater price volatility.

In the given ranking, the bond with the lowest price volatility (shortest duration) is bond 4, followed by bond 2, bond 1, and bond 3. This implies that bond 4 is the least affected by interest rate changes and has the lowest price volatility, while bond 3 is the most sensitive to interest rate changes and has the highest price volatility.

The ranking is based on the understanding that longer-term bonds tend to have higher durations and are more susceptible to price fluctuations due to changes in interest rates, while shorter-term bonds have lower durations and exhibit lower price volatility.

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Answer:The answer IS true

Explanation:

In the polysaccharide cellulose, large numbers of monosaccharides are linked together through glycosidic linkages.

TPolysaccharides, which are the most ubiquitous carbohydrates in nature, serve a number of functions, including energy storage and incorporation into plant cell walls.

Tens to thousands of monosaccharides are joined together via glycosidic linkages to form large polymers known as polysaccharides. The three most frequent polysaccharides are starch, glycogen, and cellulose. They are collectively referred to as homopolymers because, after complete hydrolysis, each of these three exclusively yields one type of monosaccharide (glucose).

Heteropolymers may also comprise sugar acids, amino sugars, or non-carbohydrate substances in addition to monosaccharides. Polysaccharides, a class of non-reducing carbohydrates, are not sweet and do not change. 

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Answer:

Explanation:

The reaction undergoing least change in volume will have lowest change in entropy .

1 ) C₂H₂(g) + 5/2O₂(g) → 2CO₂(g) + H₂O(g)

change in volume = 2.5 +1 - ( 2 + 1 ) = 0.5

2 ) CH₄(g) + 2O₂(g) → CO₂(g) + 2H₂O(g)

change in volume = 2 +1 - ( 2 + 1 ) = zero

3 ) C₂H₆(g) + 7/2O₂(g) → 2CO₂(g) + 3H₂O(g)

change in volume = 3 +2 - ( 3.5  + 1 ) = 0.5

4 ) C₂H₄(g) + 3O₂(g) → 2CO₂(g) + 2H₂O(g)

change in volume = 2 +2 - ( 3  + 1 ) = zero

Hence least change in volume is in case no - 2 and 4 .

In reaction

C₂H₄(g) + 3O₂(g) → 2CO₂(g) + 2H₂O(g) and

CH₄(g) + 2O₂(g) → CO₂(g) + 2H₂O(g)

∆S° or change in entropy is least .

Because vinegar is more dense than oil, it will sink to the bottom while the oil floats to the top.

When two or more liquids are mixed, they may or may not form a hom---ogeneous mixture depending on their chemical and physical properties. A hom---ogeneous mixture is one that has a uniform composition throughout, while a heter---ogeneous mixture is one that has a non-uniform composition and may exhibit separation of its components over time. In the case of liquids, the separation is due to differences in their densities.

Liquids can be thought of as having different layers, where the density of each layer depends on the type of liquid and its temperature.

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Johnny’s reasoning that he can hear the train better by putting his ear to the ground is correct because sound waves travel faster through solids than they do through air.

Sound waves are longitudinal waves that travel through mediums by vibrating the particles within the medium. The different mediums that sound waves can travel through include solids, liquids, and gases.

The speed of sound is determined by the properties of the medium it is traveling through. Sound travels faster through denser mediums because there are more particles to vibrate and transmit the sound wave. Therefore, Mary’s reasoning that sound will travel faster through a thinner medium is incorrect.

Johnny’s reasoning that he can hear the train better by putting his ear to the ground is correct because sound waves travel faster through solids than they do through air.

When sound waves move from one medium to another, they change speed and direction. When sound waves move from air to ground, they encounter a denser medium and slow down. This causes them to bend toward the ground and spread out along their surface.

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Johnny would be the first that would hear the train.

Now we have to take out minds back to the speed of sound in the various media that we have. We must first of all know that sound is a mechanical wave and that the implication of this is that the wave would travel through a medium.

Sound sets the medium that it travels through into vibration. The implication of this is that the sound would travel in compressions and rare factions.  This occurs more easily in the solid ground.

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Answer:

isobar

Explanation:

edge 23

Answer:

The object with less mass will have a greater change in velocity

Explanation:

Answer:

the one with the smaller object mass becaise you get more force upon impact with less effort to move

Answer:

A calcium ion will form a 1+ charge because it will have more protons than electrons.

Explanation:

Electrons have negative charges

Protons have positive charges

Calcium likes to lose its extra electron to achieve an octet outer shell and be "happy".

Answer: 71.76

Explanation:

Answer:

71.76

Explanation:

You plug them in the equation said there

When mentos and diet coke are mixed, the diet soda explodes

Explanation:

Due to the fact that the mentos are dense, they sink to the bottom of the bottle which gives the diet coke its explosion.

Answers & Explanations:

What happens when Mentos and Diet Coke are mixed?

Mentos sinks rapidly through the liquid, causing a fast, large eruption.

What causes Mentos and Diet Coke to react that way?

The addition of the Mentos leads to the rapid nucleation of carbon dioxide gas bubbles in the Diet Coke, causing them to precipitate out of the solution.

Is the reaction Chemical or Physical?

The eruption is caused by a physical reaction.

How could we prove one way or the other?

We can prove it by using the equation:

\(CO_{2} (aq) = Co_{2}(g)\)

Answer:

A part.

Explanation:

Because the reactants must be the exact same as the the products.