9. A gas sample occupies 3.25 liters at 24.5 °C and 1825 mm Hg. Determine
the temperature at which the gas will occupy 4250 mL at 1.50 atm.

Under constant-pressure conditions a sample of hydrogen gas initially at and is cooled until its final volume is V, its final temperature is -25 C.

The letter H and atomic number 1 stand for the chemical element hydrogen. Hydrogen gas is the lightest element. Hydrogen is typically a gas with the formula H2 made up of diatomic molecules. It is very flammable, tasteless, colorless, odorless, and non-toxic. Hydrogen is the most common chemical in the universe, accounting for around 75% of all ordinary matter. Most stars, including the Sun, are composed primarily of plasma hydrogen. On Earth, hydrogen mostly manifests itself as organic and water molecules. The most common isotope of hydrogen, 1H, has one proton, one electron, and no neutrons in each of its atoms. Hydrogen is a nonmetallic element that, barring extremely high pressures, can easily form a single covalent bond with the majority of other nonmetallic elements to produce molecules like water and nearly all organic compounds. Hydrogen plays a special role in acid-base reactions because these reactions usually involve the exchange of protons between soluble molecules. Hydrogen can exist in ionic compounds as either a positively charged (or cation) species known as a hydride or a negatively charged (or anion) species known as an anion.

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Chemical reaction to biomass, like kiwi, into synthetic materials, like plastic, impact society because kiwi is biodegradable but plastic is not.

The series of chemical reactions used to change natural resources into synthetic products is termed chemical synthesis. Synthetic materials are formed when humans mix substances together for the purpose of creating new materials with desirable properties. Synthetic materials are produced by chemically changing the initial substances to create some material with different characteristics. Some of the best examples of synthetic materials are plastics and medicines. A synthetic substance may or may not be chemically identical to a naturally-occurring substance.

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1.50g was the sample's weight.

The movement of minuscule atoms, molecules, or electrons in solids, liquids, and gases produces heat energy. From one thing to another, excess heat can be exchanged. Heat is the flow or transfer that occurs as a result of the temperature differential between two objects.

Briefing:

From the question, we have

q= 9.86 J

C = 0.90 J/g-K

Temperature ΔT = ( 30.5 ºC - 23.2 ºC ) = 7.3 ºC = 7.3 K

The heat (q) absorbed is,

q = m x C x ΔT    

m= q/ (C x ΔT)

m = 9.86 J / ( 0.90 J/g-K ) x 7.3 K ) = 1.50 g

The mass of the sample = 1.50 g

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The molar mass of the unknown diprotic acid, given that 0.104 g of the acid was dissolved in 150 mL of water is 43.42 g/mol

First, we shall dtermine the mole of NaOH. This can be obtained as follow:

Mole = Molarity x Volume

Mole of NaOH = 0.103 × 0.0465

Mole of NaOH = 0.00479 mole

Finally, we shall determine the molar mass of the unknown diprotic acid. Details below:

Balanced equation:

H₂X + 2NaOH —> Na₂X + 2H₂O

Note: H₂X is the diprotic acid

From the balanced equation above,

2 moles of NaOH reacted with 1 mole of H₂X.

Therefore,

0.00479 mole of NaOH will react with = 0.00479 / 2 = 0.002395 mole of H₂X.

Molar mass = mass / mole

Molar mass of diprotic acid = 0.104 / 0.002395

Molar mass of diprotic acid = 43.42 g/mol

Thus, the molar mass of the diprotic acid is 43.42 g/mol

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The molecular formula for a compound with a molar mass of 52 g/mol and an empirical formula of ch is C4H4 (Cyclobutadiene).

Mass of  C=12g

Mass of  H=1g. We can have 4 C's (4*12=48) and 4 H's (4*1=4)

so 48+ 4 is 52. Plus C4H4 has an empirical formula of CH since C4H4can be simplified. Cyclobutadiene is an organic compound with the formula C4H4. It is very reactive owing to its tendency to dimerize. Although the parent compound has not been isolated, some substituted derivatives are robust and a single molecule of cyclobutadiene is quite stable. Since the compound degrades by a bimolecular process, the species can be observed by matrix isolation techniques at temperatures below 35 K. It is thought to adopt a rectangular structure.

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In the cold countries where it snows heavily common salt or calcium chloride is scattered on the roads to melt the ice because they are an economical method to do so.

In the countries of cold climate a lot of snow gets accumulated on the driveways.

The blockage of the drivers is cured by using the calcium chloride solution or common rock salt.

These are very economical and easily available method to melt the ice in cold countries where it snows heavily.

When the rock salt or calcium chloride are scattered on the ice the releases heat which results in the melting of the ice due to snow.

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10.0 liter container containing 3.0 moles of an ideal gas at 5.00 atmospheres of pressure and at 37 C. 78 dalton will be the new pressure of the container if its volume is decreased to 4.00 liters while the temperature is increased to 100 C.

Atmospheric pressure, often known as barometric pressure, refers to the pressure present in Earth's atmosphere (after the barometer). 101,325 Pa (1,013.25 hPa), or 1013.25 millibars, 760 mm Hg, 29,9212 inches Hg, or 14.696 psi, is the definition of the standard atmosphere, or atm. One atmosphere, or one atm, is about similar to the average atmospheric pressure at sea level on Earth. The hydrostatic pressure that results from the weight of the air above the measuring point is typically a close approximation of atmospheric pressure. Atmospheric pressure decreases as height increases because there is less air mass at lower elevations. due to the thinness of the atmosphere in comparison to the Earth's radius. The Earth's gravitational acceleration, which is thought to be constant with regard to height, is largely to blame for this fall-off. The SI unit for pressure is the pascal, which is equal to 1 newton per square meter (1 N/m2). A column of air with a cross-sectional area of 1 square centimeter (cm2) has an average mass of about 1.03 kilogram and exerts a force or "weight" of about 10.1 newtons, translating to a pressure of 10.1 N/cm2 or 101 kN/m2 from mean sea level to the top of Earth's atmosphere (101 kilopascals, kPa). A column of air would weigh around 14.7 lbf and impose a pressure of 14.7 lbf/in with a cross-sectional area of 1 in2.

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Answer:

Below

Explanation:

Harmonics are additional frequencies that are present in a complex sound wave, in addition to the fundamental frequency. The fundamental frequency is the lowest, or "base," frequency of the sound, and it determines the pitch of the sound. The harmonics, on the other hand, determine the timbre, or "tone color," of the sound.

For example, the sound of a guitar string being plucked will have a fundamental frequency that determines the pitch of the note, but it will also have harmonics that give the note its characteristic "guitar-like" sound. Different instruments and voices produce different sets of harmonics, which is why they all have their own unique timbres.

In musical terms, harmonics can refer to the overtones, or higher-pitched frequencies, that are present in a musical note. These overtones can be used to create chords and other musical structures, and they play a crucial role in the way that music sounds to our ears.

Entropy will increase by 0.693 isothermal process.

The temperature of the system is constant (T = const) during an isothermal process, which is a thermodynamic process.

In order to maintain constant temperature control with the reservoir through heat exchange, the heat transfer into or out of the system normally needs to occur at such a slow rate. The thermal equilibrium is preserved in each of these states.

We know that

ΔS=nRln (V1/V2)

if V1=2V2 then it will become nR2ln.

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Answer:

Sorption is a concomitant phenomenon of adsorption and absorption. Adsorption describes the phenomenon in which molecules that are present in a fluid (liquid or gas), concentrated spontaneously on a solid surface by a finite time. Sorption is a concomitant phenomenon of adsorption and absorption.

The white ring of the NH₄Cl is formed at 24.3cm far from Hcl end.

What is grahams law of diffusion?

According to Graham's law, a gas's rate of diffusion or effusion is inversely related to the square root of its molar mass.

What is solid?

Solid ground is a substance that is hard, firm, or compact. having relative firmness, particle coherence, or form permanence as matter that is not liquid or gaseous: solid particles suspended in a liquid. regarding such a matter: Ice is water when it's solid.

According to grahams law of diffusion, rate of diffusion is inversely propotional to square root of its density and molar mass.

r ∝ 1/ [tex]\sqrt{d}[/tex] and γ ∝ 1/ [tex]\sqrt{M}[/tex]

γ NH₃/ γ HCl = [tex]\sqrt{M HCl / M NH3}[/tex] = [tex]\sqrt{36.5/17}[/tex]
1.465/ 1

given that

tube length = 60.0cm

We known that rate = distance / time

Time = distance / rate

let X be the distance travelled by HCl and

60-X be the distance travelled by NH₃

Time taken for HCl = Distance travelled by HCl/ rate of diffusion of Hcl

Time taken for NH₃ =  Distance travelled by NH₃ / rate of diffusion of Hcl

Since both gases are introduced at the same time and travelled same time

distance travelled by HCl (dHCl) / rate of diffusion of HCl = distance travelled by NH₃  ( dNH₃) / rate of diffusion of NH₃ (r NH₃ )

γ NH₃ / γ HCl = d NH₃ / d HCl  = 60-X /X = 1.465/1

60-X = 1.465X

60=2.465X

X=60/ 2.465= 24.34 cm

Therefore, white ring of the NH₄Cl is formed at 24.3cm far from Hcl end.

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Answer:

A. color change

Explanation:

I'm 100% sure this is correct. Hope it helps! May I please have a brainliest for this? Thank you!

Answer:

the answer is A

Explanation:

PLEASE MARK AS BRAINLIEST

The statement strengthens the argument for solar energy :

- The cost of solar energy continues to decline as production increases.

- Solar energy is abundant renewable resource and can be produced locally in remote areas.

- Solar energy has a high energy yield and can be used almost anywhere including rooftops.

Solar energy can be described as radiant light and heat from the Sun that is used by technologies such as solar power to generate electricity, solar thermal energy, and solar architecture. Solar energy is an essential source of renewable energy, and its technologies can be characterized as passive or active depending on how they capture and distribute solar energy.

In the given question the statement weakens the argument for solar energy Solar panels takes up a lot of space compared to other energy sources. The initial cost of the solar system is still relatively high.

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The concentration of a solution formed by diluting 25.0 ml of a 3.2 m nacl solution to 135.0 ml is 0.60 mol

M1V1=M2V2

M2=M1V1/V2

M2= 3.2×25.0 ÷ 135.0

M2=0.60 mol.

The term "concentration" in chemistry refers to the elements that make up a mixture or solution. Here's how concentration is defined and how it can be calculated using various techniques. Concentration in chemistry refers to the quantity of a substance in a given area. The ratio of the solute in a solution to the solvent or total solution is another way to define concentration. In order to express concentration, mass per unit volume is typically used. The solute concentration can, however, also be expressed in moles or volumetric units. Concentration may be expressed as per unit mass rather than volume. Although concentration is typically used to describe chemical solutions, it can be calculated for any mixture. Concentration Examples in Units: g/cm3, kg/l, M, m, N, and kg/L

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The binding energy of carbon-12 per nucleon. The mass of a proton is 1.007276 u, of a neutron 1.008665 u, and of carbon 11.996706 u is 7.94 MeV.

given that :

mass of protons = 1.007276 u

mass of neutrons = 1.008665 u

mass of carbon = 11.996706 u

mass of electron = 0.00055 u

the atomic mass of ¹²C₆ = 6 × 1.00758 + 6 × 1.00893 + 6 ×0.00055

                                        =   12.10236 u

the mass defect = 11.996706 u - 12.10236 u

                           = 0.105654 u

The binding energy = 0.105654 × 931 = 95.30 MeV

binding energy per nucleon = 95.30 / 12

                                               = 7.94 MeV

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Answer:

A) Insolation

Explanation:

"the amount of solar radiation reaching a given area"

Answer:

A. Insolation

Explanation:

Incoming ultraviolet, visible, and a limited portion of infrared energy (together sometimes called "shortwave radiation") from the Sun drive the Earth's climate system.

so the answer is A.Insolation

Answer:

group

Explanation:

Given statement is True, No single theory of bonding accounts for everything that chemists observe about covalent bonds. According to the valence bond theory, side-by-side bonds are called pi bonds.

The strongest bonds are those that form along the axis. Side-by-side overlap of orbitals produces a stronger bond than end-to-end overlap.A covalent bond is a chemical bond that involves the sharing of electrons to form electron pairs between atoms. These electron pairs are known as shared pairs or bonding pairs. Covalent bonding also includes many kinds of interactions, including σ-bonding, π-bonding, metal-to-metal bonding, agostic interactions, bent bonds, three-center two-electron bonds and three-center four-electron bonds

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The pH of the resulting solution is 9.96 that can be calculated by using the using the pOH values.

Buffer Solution is a water solvent primarily based totally answer which includes a combination containing a vulnerable acid and the conjugate base of the vulnerable acid, or a vulnerable base and the conjugate acid of the vulnerable base. They face up to a alternate in pH upon dilution or upon the addition of small quantities of acid/alkali to them.

Millimoles of NH3 = 0.316 x 250 = 79

Millimoles of NH4Br = 0.339 x 250 = 84.75

Millimoles of KOH = 57.3

pOH  = pKb + log [salt - C / base + C]

       = 4.74 + log [84.75 - 57.3 / 79 + 57.3]

      = 4.04

pH + pOH=14

pH=14-4.04

pH = 9.96

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A replacement reaction is one wherein a set of atoms is replaced by another atom in a molecule. In the given reactions is 2Na + Cl₂ → 2NaCl is not a replacement reaction.

A displacement reaction also known as a replacement reaction can be defined as one wherein an atom is displaced by another atom in a molecule. For example, when iron (Fe) is added to a solution of copper sulfate (CuSO₄), it displaces the copper (Cu) metal.

A single replacement reaction can be described as a kind of redox reaction when an element moves out of a compound, one element is replaced by the other in its own compound.

[tex]A +BC\longrightarrow AB +C[/tex]

Double replacement reactions take place mostly in aqueous solutions wherein the ions precipitate and the exchange of ions occurs. The double replacement reaction can be represented as:

[tex]AB +CD\longrightarrow AC +BD[/tex]

Therefore, option (D) is correct.

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Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore, 126.05g of  Au can be obtained from 136.8g of Au[tex]_2[/tex]S.

The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity or amount of substance. We know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number.

Mathematically,

mole =given mass ÷ molar mass

Molar mass of Au[tex]_2[/tex]S = 425.9g/mol

given mass of Au[tex]_2[/tex]S = 136.8g

moles of Au[tex]_2[/tex]S =  136.8÷ 425.9

                       =0.32moles

Moles of Au in Au[tex]_2[/tex]S= 2×0.32moles

                                 = 0.64moles

mass of Au= moles of Au×Molar mass of Au

                    = 0.64×196.96

                   = 126.05g

Therefore,  126.05g of  Au can be obtained from 136.8g of Au[tex]_2[/tex]S.

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Basic amino acids are Arginine, Polar amino acids are Glutamine and non polar amino acids are Alanine.

Arginine is an essential amino acid that has a positively charged guanidine group. Arginine is well designed to bind the phosphate anion, and is often found in the active centers of proteins that bind phosphorylated substrates.  Glutamine is a polar amino acid. It thus most prefers to substitute for other polar residues, in particular Glutamate, which differs only in that it contains an oxygen in place of the amino group in Glutamine. It can also substitute with other polar amino acids. Alanine is an neutral non polar amino acid that is used to make proteins. It is used to break down tryptophan and vitamin B-6. It is a source of energy for muscles and the central nervous system. It strengthens the immune system and helps the body use sugars.

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The STP equation is Pressure , P = 1 atm , Temperature , T = 273.15 K.

The ideal gas equation is given as :

P V = n R T

where,

P = pressure of the gas = 1 atm

V = volume of the gas

n = 1 mol

R = constant = 0.823 atm L / mol K

T = temperature = 273.15 K

V = n R T / P

V = (1 × 0.082 ×273.15 ) / 1

V = 22.4 L

thus, at STP , that is standard temperature and the pressure,  the volume is 22.4 L.

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No it would not work because an insulator stops electrons from moving from moving to atom to atom so there is no way to get a charge to the metal leaves

What is metal leaf electroscope

Gold leaf electroscop has two gold leafs suspended from a metal(usually brass) stem in a vacuumed glass jar and connected to a metal cap.  The glass is grounded with the help of a metal foil to make it uncharged. It can be used to:
Detect charge: Body under test is touched with the metal cap. If the leaves diverge, the body is charged and if there is no effect on leaves, then the body is uncharged.
To identify the nature of charge: The electroscope is charged by a known body(say positively charged body) and then the body is removed. Next, the body under test is brought in contact with the metal cap. If the leaves diverge further, the body has same charge(positive) and if the leaves come closer to each other, the body has opposite charge(negative).
Identify a body as conductor or insulator: Take two electroscopes. Charge one of the electroscopes so that its leaves will diverge. Then, connect the two electroscopes by the object under test. If the leaves of other electroscope diverge, the body is a conductor and if there is no effect on the electroscopes, the body is an insulator.

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When an element from group 2 bonds with an element from group 17 an ionic bond is formed, due to electronegativity difference.

Chemical Bonding generally refers to the formation of a chemical bond between two or more atoms, molecules, or ions to give rise to a chemical compound. These chemical bonds are what keep the atoms together in the resulting compound.

Ionic bond, also called as the electrovalent bond, type of linkage formed from the electrostatic attraction between oppositely charged ions in a chemical compound. Such a bond forms when the valence that is  the outermost electrons of one atom are transferred permanently to another atom.

In the above given case when element from group 2 reacts with the element of group 17, it will form a ionic bond due to the huge electronegativity difference.

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The density of this planet's atmosphere is 5.86kg/m³.

At sea level, the density of the air is roughly 1.2 kg/m3 (1.2 g/L, 0.0012 g/cm3). Utilizing measurements of temperature, pressure, and humidity, density is calculated instead of being directly measured (a form of the ideal gas law). As altitude rises, the density of the atmosphere declines.

Given,

Molar mass = 28.6 gmoL

Temperature = 95k

Pressure = 1.6atm

Density of this planet's atmosphere = MP/RT

Density of this planet's atmosphere = 28.6×1.6/0.0821×95

Density of this planet's atmosphere = 45.76/7.8

Density of this planet's atmosphere = 5.86kg/m³.

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The plasma etching is the etching process produces the more anisotropic etching in  fabrication.

What is anisotropic?

In contrast to isotropy, a material's ability to alter or take on various qualities in different directions

What is etching process ?

Chemical etching is a type of engraving that removes material from metal while also etching a permanent image using a high-pressure, high-temperature chemical spray. To generate the desired picture, the material's surface is covered with a mask or resist, which is then carefully peeled off, revealing the metal.

Therefore, plasma etching is the etching process produces the more anisotropic etching in  fabrication.

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Answer:

No

Explanation:

It is not a serious condition because people who have it don't face any life threatening, or even health threatening symptoms. The only bad symptoms that a person can have are diarrhea, gas, or bloating, which are all pretty uncomfortable, but aren't serious things.

-Hope this helped & Happy Holidays!