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The pressure of 8.06 L of an ideal gas in a flexible container is decreased to one-third of its original pressure, and its absolute temperature is decreased by one-half and the final volume of gas is 12.09 L

The volume of gas in a flexible container is 8.06 L

The pressure is P1=X atm

Temperature is T1=YK

Let us calculate the volume V2 if Pressure P2=X/3 atm

Temperature T2=Y/2 K

Using the ideal gas equation, we get

P1V1/T1=P2V2/T2

V2=V1P1T2/T1P2

V2=8.06LX atm×Y/2K/YK.X/3 atm

V2=8.06x3/2

V2=12.09 L

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Energy sources found underground Oil, natural gas, and coal are collectively called fossil fuels.

sources of energy are fossil fuels formed within the Earth from dead plants and animals over millions of years—hence the name “fossil” fuels. They are established in underground layers of rock and dregs. Nonrenewable energy resources involve coal, natural gas, and oil, ... They are found in underground layers of rock and lees.

Still oil and natural gas will pursue to be the world's top two energy sources accounting for about 60 percent of global demand main energy sources are generally restricted as renewable or nonrenewable on the basis of whether they draw on an exhausted energy resource.

So we can conclude that Even today, oil, coal, and gas serve about 80 chunks of our energy source needs.

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Answer:

37.05 cm³

Explanation:

0.715 kg = (0.715 × 1000) g = 715g

volume = mass/density = 715/19.3 = 37.05 cm³

If a certain ore is 21.3% nickel by mass. The number of kilograms of this ore would you need to dig up to have 20.0 g of nickel is: 93.897 kg.

Using this formula to determine the  mass of ore

Mass of ore = Mass of nickel / Percentage of nickel by mass

Convert the percentage to decimal form by dividing it by 100

0.213 = 21.3%.

So,

Mass of ore = (20.0 g) / (0.213)

Mass of ore = 93.897 kg

Therefore the  mass of ore is 93.897 kg.

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Radioisotopes like Chlorine-36 is used for dating groundwater, Uranium-238 is used for analyzing rocks, Carbon-14 is used for dating bones whereas Cobalt-60 is used in killing cancerous cells.

The radionuclides of a heavy element are known as radioisotopes. They are atoms that have an unstable mix of protons and neutrons. In their nucleus, there is excess energy.

Some elements could have one or more unstable isotopes. These unstable isotopes cause gamma rays and the Alpha particles they release to decay.

Radioactive isotopes or radioisotopes are isotopes that are unstable owing to the presence of additional neutrons in their nuclei and produce different forms of radiation.

For instance: Uranium-238, Cobalt-60, Carbon-14, and Chlorine-36

Use of Radioisotopes:

(i) Cancer patients receive therapy using them.

(ii) They are used to evaluate rock formations

(iii) To date groundwater

(iv) To date bones

(v) Medical professionals utilize radioactive isotopes as "tracers" to find malignancies and blood clots in patients.

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Answer:

frequency

Explanation:

i just did it

Answer:

A: analog signal

Explanation:

on edge2021!

The most suitable choice is "likely" to convey the doubt or uncertainty regarding the boss's willingness to agree. Option B)

Based on the given context, the word that best fits the sentence is "likely."

The sentence implies that the speaker doubts the boss's willingness to agree with something. In this case, "likely" expresses the probability or possibility of the boss agreeing. It suggests that the boss is not expected to be receptive or open to the idea.

"Probable" implies a higher degree of certainty or likelihood, which may not be suitable in this context since the sentence indicates skepticism about the boss's agreement.

"Suitable" means appropriate or fitting, but it does not convey the sense of agreement or willingness.

"Talkative" refers to someone who is inclined to talk a lot, which is unrelated to the boss's agreement.

Therefore, the most suitable choice is "likely" to convey the doubt or uncertainty regarding the boss's willingness to agree. Hence option B) is correct.

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Answer:

Elliptical galaxies are one of the three types of galaxies. They have a rounded shape of an ellipse, like a stretched-out circle. They lack the swirling arms that are a main feature of spiral galaxies.

Explanation:

We have to find the phase of water at 0.25 atm and 0°C. If we look at the phase diagram of water and throw the lines we will find that the phase of water at those conditions is solid.

Answer: d. Solid

The volume of the base that we are going to require in the process would be 28.5 mL

A neutralization reaction is a chemical reaction that occurs when an acid reacts with a base to form a salt and water. It is called a neutralization reaction because the resulting solution is neutral, with a pH of around 7.

We have that;

CAVA/CBVB = NA/NB

CAVANB = CBVBNA

VB = CAVANB/CBNA

VB = 0.132 * 12 * 2/0.111 * 1

VB = 28.5 mL

We are going to use the base that would have a volume of 28.5 mL

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Answer:

The electron configuration 1s22s22p3s23p5

is the element Silicon.

Answer:

position

Explanation:

The position of an object is its location in a space.

Answer:

283.211

Explanation:

The microstructure features exactly two components and two different phases in the given nanostructure. Therefore, the correct option is option B.

Within physical chemistry, engineering, mining, as well as materials science, a phase diagram is a specific kind of diagram that displays the parameters  at which thermodynamically different phases arise and coexist at equilibrium.

Lines of equilibrium, also known as phase boundaries, or circumstances under which different phases may coexist at equilibrium, are typical elements of a phase diagram. The microstructure features exactly two components and two different phases in the given nanostructure.

Therefore, the correct option is option B.

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Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore, 0.25moles  of He are in a container with a volume of 5.6 L at STP.

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.

One mole of ideal gas has 22.4L volume at STP.

number of moles of Helium = Given volume ÷volume occupied by gas at STP

Given volume of helium = 5.6 L

Substituting all the given values, we get

number of moles of Helium = 5.6 L  ÷22.4L

number of moles of Helium =0.25moles

Therefore, 0.25moles  of He are in a container with a volume of 5.6 L at STP.

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Answer: 0.25 moles

Explanation:

Given volume of helium = 5.6 L

Substituting all the given values, we get

number of moles of Helium = 5.6 L  ÷22.4L

number of moles of Helium =0.25moles

Therefore, 0.25moles  of He are in a container with a volume of 5.6 L at STP.

Answer:

A DC power supply, commutator, rotor armature, axle, and a field magnet.

Answer:

A) Cl2 + 2NaI = 2NaCl + I2

The solution's volume is 100 divided by 0.971 to get 102.98 mL. The number of moles of the solute (acetone) per litre of the solution is its molarity. Divide the mass by the molar mass to get the number of moles of acetone: 1.41 g / 58.08 g/mol = 0.0243 mol.

Molarity (M), which is determined by dividing the solute's mass in moles by the volume of the solution in litres, is the most widely used unit to express solution concentration: litres of solution/moles of solute equals M. One litre of a solution with a 1.00 molar concentration (1.00 M) contains 1.00 moles of solute.

The proportion of the solute that is dissolved in a solution is indicated by the solution's concentration. This formula can be used to determine a solution's concentration: Concentration is calculated as Volume of Solute multiplied by 100 and Volume of Solution (ml).

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Answer:

Because People think they can be someone else instead of themselves. They don't want to be labeled, and they don't want to be insecure.

Explanation: Just be yourself. No one else.

Answer:

The enthalpy of combustion of ethanol is -1430 kJ/mol, which means that for every mole of ethanol that is burned, 1430 kJ of heat is released.

To determine the amount of heat given off from the combustion of 1 dm³ of ethanol, we need to first calculate the number of moles of ethanol in 1 dm³.

1 dm³ is equivalent to 1000 cm³. Since the density of ethanol is 0.79 g/cm³, the mass of 1 dm³ of ethanol can be calculated as:

mass = density x volume

mass = 0.79 g/cm³ x 1000 cm³

mass = 790 g

To convert this mass to moles, we need to divide by the molar mass of ethanol:

moles = mass / molar mass

moles = 790 g / 46 g/mol

moles = 17.17 mol

Therefore, 1 dm³ of ethanol contains 17.17 moles of ethanol.

To calculate the heat given off from the combustion of 1 dm³ of ethanol, we can use the following equation:

heat = enthalpy of combustion x moles of ethanol

heat = -1430 kJ/mol x 17.17 mol

heat = -24,551 kJ

Therefore, the heat given off from the combustion of 1 dm³ of ethanol is -24,551 kJ, or approximately 24,551 kJ of heat is released.

A) Ethanol in water: Distillation.

B) Boiling the mixture of chloride crystals with water: Evaporation.

C) Pure water from muddy water: Filtration.

D) Sodium chloride in water: Evaporation or Crystallization.

E) Sodium carbonate in water: Filtration or Evaporation.

F) Chlorophyll from leaves: Extraction using a suitable solvent like ethanol.

G) Mixture of acetic acid and alcohol: Distillation.

H) Serum from blood sample: Centrifugation.

I) Kerosene from water: Separatory funnel or Decantation.

J) Ammonium chloride in sand: Sublimation or Dissolving in water and Filtration.

A) Ethanol in water: Distillation can be used to separate ethanol from water based on their different boiling points.

B) Boiling the mixture of chloride crystals with water: By heating the mixture, the water will evaporate, leaving behind the chloride crystals.

C) Pure water from muddy water: Filtration can be used to separate the solid particles (mud) from the water.

D) Sodium chloride in water: Evaporation can be used to separate sodium chloride from water by heating the mixture until the water evaporates, leaving behind the salt.

E) Sodium carbonate in water: Filtration can be used to separate solid sodium carbonate from water, similar to muddy water.

F) Chlorophyll from leaves: Extraction using a suitable solvent like ethanol or acetone can be used to separate chlorophyll from leaves.

G) Mixture of acetic acid and alcohol: Distillation can be used to separate the mixture based on their different boiling points.

H) Serum from blood sample: Centrifugation can be used to separate the serum, which is the liquid part of blood, from the solid components like cells.

I) Kerosene from water: Separatory funnel or decantation can be used to separate the immiscible liquids by pouring off the top layer (kerosene) from the bottom layer (water).

J) Ammonium chloride in sand: Sublimation can be used to separate ammonium chloride by heating the mixture, causing the ammonium chloride to vaporize and then condense back into solid form in a cooler region, leaving the sand behind.

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The density  of plastic of length of 5 cm, width of 5 cm, and a height of 5 cm would be  1.6 gm / cm3.

In this case

The dimensions of a square chunk of plastic is 5 cm x 5 cm x 5cm.

Mass, m = 200 gm

Density =  Mass / Volume

It will form a cube. Hence, the Volume = side x side x side

So ,

d = 200 gm / 5cm x 5 cm x 5 cm

d = 1.6 gm / cm3

Hence , Density is equal to 1.6 gm / cm3.

What is density explain?

Density can be defined as the mass per unit volume. Density Symbol.

Density Formula: ρ = m/V,

where ρ is the density

m is the mass of the object and V can be defined as Volume.

What is a unit of density?

It is commonly expressed in units of grams per cubic cm.

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Answer: The value of the equilibrium constant Kc for this reaction is 0.088

Explanation:

\(Molarity=\frac{x}{M\times V_s}\)

where,

x = given mass

M = molar mass

\(V_s\) = volume of solution in L

Equilibrium concentration of \(CaCO_3\) = \(\frac{25.3}{100\times 9.0}=0.028M\)

Equilibrium concentration of \(CaO\) = \(\frac{14.9}{56\times 9.0}=0.029M\)

Equilibrium concentration of \(CO_2\) = \(\frac{33.7}{44\times 9.0}=0.085M\)

The given balanced equilibrium reaction is,

\(CaCO_3(s)\rightleftharpoons CaO(s)+CO_2(g)\)

The expression for equilibrium constant for this reaction will be,

\(K_c=\frac{[CaO]\times [CO_2]}{[CaCO_3]}\)  

Now put all the given values in this expression, we get :

\(K_c=\frac{0.029\times 0.085}{0.028}=0.088\)

The number of moles of the water that was evaporated is  12083467.5 moles of water.

We know that the number of moles that we have can be gotten as the ratio of the mass to the number of moles of the object. Now we know that from the question, we have the volume of the hydrogen to be 90,000 gallons. We have to convert this volume to liters.

Given that;

1 gallon = 3.79 L

90,000 gallons  = 90,000 gallons  * 3.79 L/1 gallon

= 341100 L

Then we have the density of the hydrogen to be 70.85 g/L

Mass of the hydrogen =  70.85 g/L *  341100 L

= 24166935 g

Number of moles of the hydrogen reacted = 24166935 g/2 g/mol

= 12083467.5 moles

If 2 mole of hydrogen gives 2 moles of water

12083467.5 moles of hydrogen gives 12083467.5 moles of water

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Answer:   8 x 10^12

Explanation:

The prefix tera means 10^12. Each byte is 8 bits, so a terabyte is 8 x 10^12 bits.

In 1 Terbyte of storage there are \(8\times 10^{12}\).

Explanation:

1 Terabyte = 1000 Gigabyte

1 Gigabyte= 1000 Megabytes

1 Megabytes= 1000 Kilobyte

1 Kilobyte = 1000 Bytes

Given:

A single byte consists of 8 bits

To find:

The number of bits in 1 Terabyte of storage.

Solution:

1 Byte  = 8 bits

So, in Bytes in 1 Terabyte:

\(1 terabytes= 1000\times 1000\times 1000\times 1000 Bytes=10^{12} Bytes\)

Now number of bits in \(10^{12}\) bytes:

\(1Byte=8bits\\10^{12} Bytes=10^{12}\times 8 bits=8\times 10^{12} bits\)

In 1 Terabyte of storage there are \(8\times 10^{12}\) bits.

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Answer:

D.

Explanation:

Unlike the fruits that the animals have eaten, the seeds do not get digested and instead pass through the digestive track intact. Once the fruit is eaten by the animal the seeds will be deposited in the animal's waste so that they can grow into a new blackberry plant. The waste actually acts as a fertilizer which helps the seed grow once it falls into the ground where it can get the rest of the resources it needs to grow properly. This is one of many ways that animals help plants grow.

De-Broglie wavelength λ for wave association with object of mass m moving with velocity v is given by-

\(\boxed{\sf{\lambda = \frac{h}{mv}}}\)

Here, h = Planck constant( value ≈ 6.63 ×10-³⁴ joules second )

Putting Values -

λ = 6.63×10-³⁴/100×0.1

=>6.63×10-³⁴/10

=>6.63 × 10-³⁵ m

Thus, option (a) is correct.

At equilibrium, the number of moles of \(Cl_2\) (g) will be 0.2025 mol.

1: Write the balanced chemical equation:

\(C_O\)(g) + \(Cl_2\)(g) ⟶ \(C_OCl_2\)(g)

2: Set up an ICE table to track the changes in moles of the substances involved in the reaction.

Initial:

\(C_O\)(g) = 0.3500 mol

\(Cl_2\)(g) = 0.05500 mol

\(C_OCl_2\)(g) = 0 mol

Change:

\(C_O\)(g) = -x

\(Cl_2\)(g) = -x

\(C_OCl_2\)(g) = +x

Equilibrium:

\(C_O\)(g) = 0.3500 - x mol

\(Cl_2\)(g) = 0.05500 - x mol

\(C_OCl_2\)(g) = x mol

3: Write the expression for the equilibrium constant (Kc) using the concentrations of the species involved:

Kc = [\(C_OCl_2\)(g)] / [\(C_O\)(g)] * [\(Cl_2\)(g)]

4: Substitute the given equilibrium constant (Kc) value into the expression:

1.2 x \(10^3\) = x / (0.3500 - x) * (0.05500 - x)

5: Solve the equation for x. Rearrange the equation to obtain a quadratic equation:

1.2 x \(10^3\) * (0.3500 - x) * (0.05500 - x) = x

6: Simplify and solve the quadratic equation. This can be done by multiplying out the terms, rearranging the equation to standard quadratic form, and then using the quadratic formula.

7: After solving the quadratic equation, you will find two possible values for x. However, since the number of moles cannot be negative, we discard the negative solution.

8: The positive value of x represents the number of moles of \(Cl_2\)(g) at equilibrium. Substitute the value of x into the expression for \(Cl_2\)(g):

\(Cl_2\)(g) = 0.05500 - x

9: Calculate the value of \(Cl_2\)(g) at equilibrium:

\(Cl_2\)(g) = 0.05500 - x

\(Cl_2\)(g) = 0.05500 - (positive value of x)

10: Calculate the final value of \(Cl_2\) (g) at equilibrium to get the answer.

Therefore, at equilibrium, the number of moles of \(Cl_2\) (g) will be 0.2025 mol.

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Answer: 14.0

Explanation: 14.0 is a base. The more basic, the less hydrogen ion concentration.