A sample of unknown gas has a temperature of 378k. When the temperature is increased to 546k,the volume also increases to 1047 ml. What was the original volume ?

The reactive intermediate that is formed in  the reaction of tert-butyl methyl ether (MTBE) with hydrogen bromide (HBr) is a tert-butyl carbocation.

The reaction of tert-butyl methyl ether (MTBE) with hydrogen bromide (HBr) results in the substitution of a methyl group with a bromide ion, producing tert-butyl bromide (TBB). The reaction follows an S_N1 mechanism, which involves a two-step process. The first step is the protonation of MTBE with HBr, which produces a methanol molecule and a tert-butyl carbocation intermediate. This step is the rate-determining step of the reaction.

The second step involves the nucleophilic attack of the bromide ion on the tert-butyl carbocation intermediate to produce TBB. This step is very fast compared to the rate-determining step. The formation of the tert-butyl carbocation intermediate is facilitated by the electron-withdrawing nature of the oxygen atom in the MTBE molecule, which helps in stabilizing the positive charge on the carbocation.

The tert-butyl carbocation intermediate is a reactive species and can undergo further reactions, such as rearrangements and eliminations. Therefore, it is important to control the reaction conditions to minimize the formation of these unwanted byproducts. The reaction can be carried out at low temperatures and in the presence of a solvent to prevent the formation of the carbocation intermediate.

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Answer:

I literally have no idea

The element named for Time magazine's "Person of the Century" is Einsteinium which was named in recognition of Einstein's significant contributions to the field of physics.

Time magazine declared Albert Einstein as the "Person of the Century" in 1999. As a tribute to his contributions to physics and his role in shaping our understanding of the universe, the element with atomic number 99 was named Einsteinium (symbol: Es) in his honor.

Einsteinium is a synthetic element that was first synthesized in 1952 during the testing of a thermonuclear bomb. It is highly radioactive and has no practical applications outside of scientific research.

The element named for Time magazine's "Person of the Century," Albert Einstein, is Einsteinium (Es). This element, with atomic number 99, was named in recognition of Einstein's significant contributions to the field of physics and his enduring legacy as one of the greatest scientific minds in history.

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To solve this problem we are going to assume that the temperature at which the gold is found is room temperature.

We are going to use a property of materials that relates mass to volume, this is density. At this temperature, the density of gold is 19.3g/mL, the equation of density is:

We will use the following conversion factors:

1mL=1000mm^3

1atom=3.271x10^-22g

So, the atoms present in 3.00mm^2 will be:

In 3.00mm^3 of gold, there are 1.77x10^20 atoms

Answer: 1.77x10^20 atoms

Wet chemical system components typically are a storage tank or tanks, piping, nozzles, and an actuating mechanism.

The typical components of an actuation mechanism include a motor, transmission, control units, feedback, signaling, interlocking, and shutdown units. An electrical, hydraulic, or pneumatic drive is used to move a valve, shutter, or gate, which acts as an actuator to regulate the flow of fluids or gases.

When an automatic clutch is engaged, the control system 2 replaces the target-value signals coming over feeders 1 with the operator force signal if the operator uses the operator-dependent actuating mechanism.

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The amount of water that we get from the large balloon is greater than the amount of water that we get from the small balloon.

We know that water is composed of hydrogen and oxygen. Let us recall that the ratio of the water and the oxygen that form the water molecule is fixed irrespective of the volume of the water that we use for the reaction.

If we compare if you ignited a very large balloon of hydrogen and oxygen instead of a very small balloon filled with the same reactants, we would notice that the amount of water that is formed from the large balloon of hydrogen and oxygen is greater than that produced from a very small balloon filled with the same reactants.

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Answer:

Tetrahedral

Explanation:

Explanation:

The density of pure water ice at 0°C is 0.9168 g/ml, nearly 9% lighter than liquid water at 0°C, which has a density of 0.99987 g/ml 14. ... This drop in density occurs because the hydrogen bonds in water create an open hexagonal lattice, leaving space between the molecules 42.

Taking into account the definition of molarity, the molarity on the solution is 8 M.

Molar concentration or molarity is a measure of the concentration of a solute in a solution and indicates the number of moles of solute that are dissolved in a given volume.

The molarity of a solution is calculated by dividing the moles of solute by the volume of the solution:

\(Molarity=\frac{number of moles}{volume}\)

Molarity is expressed in units \(\frac{moles}{L}\).

In this case, you know that:

Replacing in the definition of molarity:

\(Molarity=\frac{2 moles}{0.250 L}\)

Solving:

Molarity= 8 \(\frac{moles}{L}\)= 8 M

Finally, the molarity on the solution is 8 M.

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When, the pH of a base B will be found to be 11.65 and having an initial concentration of 0.033 M. Then, the K value (Kb) of the base in this equilibrium is approximately 0.00452.

To determine the K value of the base (denoted as Kb), we need to use the concentration of the hydroxide ion (OH⁻) and the concentration of the base (B) in the equilibrium equation;

B(aq) + H₂O(l) ⇌ BH(aq) + OH⁻(aq)

The Kb expression for this equilibrium is;

Kb = [BH][OH⁻] / [B]

Given;

pOH = 14 - pH = 14 - 11.65 = 2.35

[OH⁻] = \(10^{(-pOH)}\) = \(10^{(-2.35)}\) = 0.00452 M

[B] = 0.033 M

Substituting these values into the Kb expression;

Kb = (0.033 M)(0.00452 M) / (0.033 M)

Kb ≈ 0.00452

Therefore, the K value (Kb) of the base will be  0.00452.

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Answer:

The air pressure in tires increases as the temperature goes up. Scientists have figured out that for every 10 degrees (Fahrenheit) that the temperature rises the tire pressure will increase by one pound per square inch

Explanation:

Answer:

decrease

Explanation:

a balloon has a volume of 10.2 l at 2.3 atm of pressure and 500c. the temperature of the same balloon at 3.3 atm and 20.4 l is  77 °c;

calculation as follows: V1/T1 =V2/T2, 2.3/298 = 2.7/T2, T2 = 77 °c. The mean vertical component of a gas's moving molecules is then evaluated by it's own pressure. The pressure acts right angles to the facade (normal); the tangential (shear) element of the force is proportional to the viscosity of the gas. The standard pressure measurement unit is the pascal (Pa). Because a pascal is a very tiny quantity of pressure, the kilopascal represents the most useful unit for each and every day gas pressures (kPa). 1000 pascals corresponds one kilopascal. The atmosphere is another frequently utilised unit of pressure (atm). Temperature and pressure are basic sets of circumstances for experimental measurements that allow comparisons between different sets of data to be made.

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Answer:

B.18 protons 22 neutrons 18 electrons

Explanation:

Neutral atom of Argon;

     Atomic mass  = 40amu

     Atomic number   = 18

Let us find the number of the subatomic particles;

 Protons are the positively charged particles in an atom

 Electrons are the negatively charged particles

 Neutrons do not carry any charges.

Now;

  Atomic mass  = number of protons + number of neutrons

   Atomic number  = number of protons

number of protons  = 18

In a neutral atom, number of protons equals number of electrons

  number of electrons  = 18

Number of neutrons  = atomic mass - atomic number

Number of neutrons  = 40 - 18  = 22

18 protons, 18 electrons and 22 neutrons

The number of atoms of chlorine present in the compound is 1.96 x 10²³ atoms.

The number of chlorine atom present in CCl₄ is calculated as follows;

The molar mass of the given compound is calculated as follows;

CCl₄  = C (12g/mol) + Cl (35.5 g/mol) x 4

CCl₄  = 154 g/mol

The number of moles of the given compound is calculate as follows;

n = reactant mass / molar mass

n = ( 12.5 g ) / ( 154 g/mol)

n = 0.081 mole

The number of moles of chlorine present in the compound is calculated as follows;

Cl₄ = 4 x 0.081 mole = 0.325 mol

The number of atoms of chlorine present in the compound is calculated as follows;

1 mole = 6.022 x 10²³ atoms

0.325 mole = ?

= 0.325 x 6.022 x 10²³ atoms

= 1.96 x 10²³ atoms

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Dibasic bases split into two OH- ions.

What is dibasic acid?
A dibasic acid is one that, when reacting with a base, can release two positively charged hydrogen ions, as well as protons. Diprotic acid is a more recent name for this kind of acid. Normally, an acid and a base will react to create salt and water. When the negative charges hydroxide ion from the base reacts with the positively charged hydrogen ion from of the acid, the result is water: H+ + OH- H2O. Two types of salt can be created from the two hydrogen atoms in a dibasic acid molecule, one of which is an acid salt with a hydrogen atom. One of the most well-known and frequently used acids is sulfuric acid, which is a good illustration of a dibasic acid.

Hence, the answer is Sr(OH)2 and Ca(OH)2.
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Answer:

Carbon Monoxide

Explanation:

that is a gas called Carbon monoxide is colorless, odorless, tasteless gas and it is flammable and kind of toxic to humans and other oxygen breathing organisms.

so therefore Carbon monoxide is the answer

The heat of vaporization of carbon tetrachloride at 310 k is ΔHvap ≈ 42.79 kJ/mol.

(a) Computing heat of vaporization using vapor pressure data:

Heat of vaporization can be calculated using the Clausius-Clapeyron equation, which relates the vapor pressure and temperature of a substance to its heat of vaporization. The equation is given as:

dP/dt = ΔHvap/RT^2

Where ΔHvap is the heat of vaporization, R is the gas constant, T is the temperature and P is the vapor pressure. We can rearrange the equation to obtain ΔHvap:

ΔHvap = R * (dP/dt) * T^2 / (T2 - T1)

Using the data given, we can estimate dP/dt by taking the slope between the two points closest to 310 K:

dP/dt = (0.369912 - 0.165077) / (320.0 - 300.0) = 0.102175

Substituting the values into the equation for ΔHvap, we obtain:

ΔHvap = 8.314 * 0.102175 * (310)^2 / (320 - 300)

ΔHvap ≈ 42.79 kJ/mol

(b) Computing heat of vaporization using SRK equation of state:

Heat of vaporization can also be estimated using a thermodynamic equation of state such as the Soave-Redlich- Kwong (SRK) equation. This equation can be used to calculate the fugacity and enthalpy of a substance and can then be used to estimate its heat of vaporization.

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Answer:

A

Explanation:

got it on edge

An echolocation refers to a method that relies on sound waves and is used by different animal species for navigation, communication, and finding food. Therefore, option A is correct.

Echolocation is a method used by bats, dolphins, and other animals to locate objects using reflected sound. This enables the animals to move around in complete darkness, allowing them to navigate, hunt, recognize friends and enemies, and avoid obstacles.

(1) To hunt for prey, bats make high-frequency sounds. (2) Sound waves are used by dolphins and other toothed whales to locate prey and navigate their surroundings. (3) Nocturnal oil birds use echolocation to navigate their surroundings, particularly in low-light conditions.

Echolocation is used to help with orientation, obstacle avoidance, food acquisition, and social interactions.

Thus, option A is correct.

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Answer:

A comet

Explanation:

Comets  travel so fats through the solar system that they melt which give them their glowy tail

Answer:

When ΔS > 0 and ΔH < 0, the process is always spontaneous as written. When ΔS < 0 and ΔH > 0, the process is never spontaneous, but the reverse process is always spontaneous. When ΔS > 0 and ΔH > 0, the process will be spontaneous at

Explanation:

What are the best conditions to lead towards a spontaneous reaction? high negative enthalpy, high temp, high positive entropy. Your enthalpy is high and negative but your entropy is also negative.

Answer:

6.05 g

Explanation:

Use the density to convert the volume to a weight.

(5.00 mL) × (1.21 g/mL) = 6.05 g liquid plant food

You will need 6.05 g liquid plant food.

Yes, you can use the method of water displacement to determine the volume of wood. The reason is that the water displacement method allows you to measure the volume of irregularly shaped objects, like wood, by observing how much water is displaced when the object is submerged.

Here are the steps to use water displacement for measuring the volume of wood:

1. Fill a container with enough water to submerge the wood completely.
2. Note the initial water level.
3. Carefully submerge the wood in the water, making sure no air bubbles are trapped.
4. Note the change in the water level.
5. Calculate the difference between the initial and final water levels. This difference represents the volume of the wood, as the amount of water displaced is equal to the volume of the object submerged.

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Answer:

False

Explanation:

Substances are of two types: Pure substances and mixtures. Pure substances include elements (made up of single kind of atoms), compounds (atoms of different element in fixed proportion). Substances are of three types: elements, compounds and mixtures.

Answer:

D

Explanation:

It could come from anybody of water around you that had some water evaporated.

Sodium is not a metal because it does not have the characteristic properties of a metal. In general, metals are known for their metallic luster, high thermal and electrical conductivity, and their ability to lose electrons to form positive ions.

Sodium, on the other hand, has a low melting point and boiling point, and is a very reactive element. It is a silvery-white metal that is highly reactive with water, causing it to catch fire and explode. This is because sodium is highly electropositive, meaning it easily loses electrons, and forms a positive ion (Na+). When sodium comes into contact with water, it reacts with the water molecules and forms sodium hydroxide (NaOH) and hydrogen gas (H2), which causes the explosion.

Additionally, Sodium has a relatively low density and is a relatively poor conductor of heat and electricity, compared to most metals.

In summary, Sodium is not classified as a metal because it does not possess the characteristic properties of a metal such as high thermal and electrical conductivity, metallic luster, and ability to lose electrons to form positive ions. Instead, it is a highly reactive and electropositive element that forms positive ions and reacts readily with water.

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Answer:

c Two hydrogen one oxygen

Explanation:

H2O

Answer:

P-waves compression waves while S-waves are shear waves.

Explanation:

P- waves has the ability to travels through solid, liquid and gaseous medium while S-waves travels through only solid medium and restricted by liquid and gaseous medium. P-waves is a type of seismic wave that will reach first to the recording station as compared to S-waves because P-waves moves faster that S-waves that moves slower so that's why P-waves reach first on the recording station that is located 500 miles away.