Krypton occupies 10.8 L at a pressure of 0.38 atm. Find the volume, in liters, of the krypton when the pressure is increased to 1.6 atm at the same temperature.

Answer:

See explaination

Explanation:

Balanced net ionic reaction.

Pb(s) + Cl2(g) ----- Pb2+ + 2Cl-

oxidation reaction :Pb(s) --- Pb2+ + 2e-

Reduction reaction:Cl2 + 2e- -----Cl-

Answer:

sedimentary rocks

Explanation:

I did this assignment

Answer:

4.02 kJ

Explanation:

We must convert the answer to kJ 4023.25 J . 1kJ /1000 =4.02kJ

Group 17 elements called halogens . All halogens have the same number of valence

electrons

The amount of heat energy produced when 1 g of hydrogen and 2 g of nitrogen are reacted, is -6.61 KJ

First, we shall obtain the limiting reactant. Details below:

3H₂ + N₂ -> 2NH₃

From the balanced equation above,

28 g of N₂ reacted with 6 g of H₂

Therefore,

2 g of N₂ will react with = (2 × 6) / 28 = 0.43 g of H₂

We can see that only 0.43 g of H₂ is needed in the reaction.

Thus, the limiting reactant is N₂

Finally, we the amount of heat energy produced. Details below:

3H₂ + N₂ -> 2NH₃ ΔH = -92.6 KJ

From the balanced equation above,

When 28 grams of N₂ reacted, -92.6 KJ of heat energy were produced.

Therefore,

When 2 grams of N₂ will react to produce = (2 × -92.6) / 28 = -6.61 KJ

Thus the heat energy produced from the reaction is -6.61 KJ

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The structural formula of butanol is C4H9OH. It consists of a chain of four carbon atoms, with a hydroxyl (-OH) group attached to one of the carbon atoms. Butanol has several structural isomers, which have the same molecular formula but different structural formulas.

A structural isomer is a compound that has the same molecular formula as another compound but has a different arrangement of its atoms. A string of 4 C atoms are bonded above, below, left, and right to H, except the second C, which is bonded below to O, which is bonded below to H is a structural isomer of butanol.

This is called butan-2-ol. The structural formula of butan-2-ol is CH3CH(OH)CH2CH3. In this isomer, the hydroxyl group is attached to the second carbon atom in the chain, whereas in butanol, the hydroxyl group is attached to the first carbon atom in the chain.

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A: begin to cool and daylight hours decrease.

Plants go through seasonal changes from summer to fall because of the changes in temperature and the length of daylight hours. As summer ends and fall begins, temperatures begin to cool down and the days become shorter. This change in temperature and daylight hours triggers physiological changes in plants, such as the slowing down of growth and the production of pigments like anthocyanins, which give leaves their characteristic red and orange colors in the fall. These changes allow the plant to prepare for the colder winter months and conserve energy for the upcoming spring growth season.

Answer:

a. begin to cool and daylight hours decrease

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Copper is a metal that can behave like a magnet because It is a conductor and can support electric current.

What is a definition of metal?

Strong electrical and thermal conductivity, malleability, ductility, and high light reflection are all characteristics of metals, which are one type of materials.

Copper is not magnetic in and of itself. However, when a magnet comes close to copper (and some other metals), the magnetic field causes the copper's surface electrons to reorganize and start revolving. They generate resistance by rotating in a circular motion perpendicular to the magnetic field.

Copper has the highest conductivity among non-precious metals, which means it can carry more electrical current than other non-precious metals.

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Answer: The answer is 9.8 m/s^2 south

Explanation:

CO 2

H ₂0

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The acid dissociation constant(Ka) is 0.0095

The reaction for this dissociation of acid is

HSO4 ⇄H+ + SO4 -2

The dissociation constant can be determined from the following expression

\(Ka= \frac{[H+] [SO4]-2}{[HSO4}\)  

[H+] = 10-PH

       = 10-1.35

[H+]  = 0.0447

[H+] = 0.0447 mol / L

From equation, [H+] = [SO4-2] = 0.0447 mol / L

[SO4-2] = 0.0447 mol / L

From the values of [H+], [SO4-2] and [HSO4] Ka can be calculated as follows,

Ka = 0.0447 * 0.0447 / 0.200

     = 0.0019 / 0.200

     = 0.0095

Hence the value of the acid dissociation constant (Ka) for the given reaction is  0.0095

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Answer:

b

Explanation:

Answer:

b

Explanation:

The force by which an object is attracted towards the earth is called the gravitational force. Pushing an object by exerting a force opposite to it is normal force. The force generated by rubbing two objects against each other and resisting motion is friction force and the pulling force from opposites sides is called tension.

Force is an external agent acting on a body to change it from the state of motion or rest. There are various kinds of force such as frictional force, magnetic force, gravitational force etc.

Gravitational force is the force by  which the an object attracts other objects into its center of mass. Earth is attracting all bodies into its surface by gravitational force.

Pushing an object by exerting a force opposite to it is normal force. The force generated by rubbing two objects against each other and resisting motion is friction force and the pulling force from opposites sides is called tension.

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The total volume of HCl(aq) used in the titration was 9.50 mL, the total volume of NaOH(aq) used was 3.80 mL, and the molarity of the sodium hydroxide solution was 0.25 M.

To determine the total volume of HCl(aq) used in the titration, we subtract the initial buret reading from the final buret reading:

Total volume of HCl(aq) = final buret reading - initial buret reading

Total volume of HCl(aq) = 25.00 mL - 15.50 mL

Total volume of HCl(aq) = 9.50 mL

To determine the total volume of NaOH(aq) used in the titration, we use the same approach:

Total volume of NaOH(aq) = final buret reading - initial buret reading

Total volume of NaOH(aq) = 8.80 mL - 5.00 mL

Total volume of NaOH(aq) = 3.80 mL

To calculate the molarity of the sodium hydroxide solution, we use the following formula:

Molarity of NaOH(aq) = (Molarity of HCl(aq) * Volume of HCl(aq)) / Volume of NaOH(aq)

Substituting the given values, we get:

Molarity of NaOH(aq) = (0.10 M * 9.50 mL) / 3.80 mL

Molarity of NaOH(aq) = 0.25 M

Therefore, the molarity of the sodium hydroxide solution is 0.25 M.

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Answer:

hand sope

Explanation:

because they are made up of carboxylic acid and sodium hydroxide (NaOH) Thus the salts formed by the reaction between a strong base and a weak acid are basic in nature.

To convert acetone (propanone) to propanal, you can use a two-step process involving reduction and oxidation reactions. Here's a general outline of the process:

1. Reduction of Acetone to Isopropanol:

First, you need to reduce acetone to isopropanol (2-propanol) using a reducing agent. Common reducing agents for this step include sodium borohydride (NaBH₄) or lithium aluminum hydride (LiAlH₄).

Reaction conditions:

- Acetone + NaBH₄ (or LiAlH₄) → Isopropanol

- Solvent: usually an alcohol (e.g., methanol or ethanol) or an ether (e.g., THF)

- Temperature: room temperature or slightly above

2. Oxidation of Isopropanol to Propanal:

Next, oxidize isopropanol to propanal using an appropriate oxidizing agent. A common oxidizing agent for this step is pyridinium chlorochromate (PCC), which selectively oxidizes primary alcohols to aldehydes without over-oxidizing to carboxylic acids.

Reaction conditions:

- Isopropanol + PCC → Propanal

- Solvent: an aprotic polar solvent (e.g., dichloromethane)

- Temperature: room temperature

- Avoid strong oxidizing agents like potassium permanganate (KMnO₄) or chromium trioxide (CrO₃) because they can over-oxidize the isopropanol to propionic acid.

Answer:

+1

Explanation:

Since the number of atoms which are reacting are equal to the number of to the number of atoms in the product, this reaction demonstrates that matter is neither created nor destroyed in a chemical reaction.

Any system that is closed to all exchanges of matter and energy is subject to the law of conservation of matter, which is a general law of physics and chemistry. This law states that regardless of how the components rearrange themselves, the mass of an object or group of things remains constant over time.

A chemical reaction is a procedure that causes one group of chemical components to change chemically into another. Chemical reactions, which can frequently be described by a chemical equation, traditionally include changes that solely affect the locations of electrons in the formation and dissolution of chemical bonds between atoms, with no change to the nuclei.

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Many island chains were formed as a result of blank volcanism is known as hotspot volcanism.

Hotspot volcanism occurs when a mantle plume, a column of hot and buoyant rock material rising from deep within the Earth's mantle, reaches the surface. These mantle plumes are stationary relative to the moving tectonic plates on the Earth's surface.

As the tectonic plate moves over the stationary hotspot, the mantle plume melts and produces magma. This magma rises through the Earth's crust, creating a volcanic eruption. Over time, repeated eruptions build up layers of lava and volcanic material, forming a cone-shaped volcano. As the tectonic plate continues to move, the volcano becomes inactive, and a new volcano forms above the stationary hotspot.

However, in the case of island chains, the tectonic plate movement carries the volcanoes away from the hotspot. As a result, a trail of extinct volcanoes is left behind, forming a linear chain of islands. Each island in the chain represents a period of volcanic activity at that specific location as the plate moved over the hotspot.

Hotspot volcanism and the formation of island chains provide valuable insights into the dynamics of Earth's mantle and plate tectonics. By studying the age progression of islands in a chain, scientists can gain a better understanding of the movement and speed of tectonic plates and the behavior of mantle plumes deep beneath the Earth's surface.

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Answer: 0.889 meters

Explanation:

Given :

Nurse Antonio adds that 7 grams of NaCI to water to make 1 liter of solution.

To Find :

The molar concentration of the solution .

Solution :

Molecular mass of NaCl , \(m=58.44\ g/mol\) .

Now , number of moles is given by :

\(n=\dfrac{\text{Given weight}}{\text{Molecular Mass}}\\\\n=\dfrac{7}{58.44}\ mole\\\\n=0.12\ moles\)

Molarity is given by :

\(M=\dfrac{\text{Number of moles}}{\text{Volume ( in Liters)}}\\\\M=\dfrac{0.12}{1}\ M\\\\M=0.12\ M\)

Hence , this is the required solution .

Chemical symbol Sg is for seaborgium with atomic number 106 and  atomic mass 269 u while element with atomic number 118 is oganesson  with symbol Og and atomic mass 294 u, neodymium has symbol Nd with atomic number 60 and atomic mass 144.24 u.

It is defined as a substance which cannot be broken down further into any other substance. Each element is made up of its own type of atom. Due to this reason all elements are different from one another.

Elements can be classified as metals and non-metals. Metals are shiny and conduct electricity and are all solids at room temperature except mercury. Non-metals do not conduct electricity and are mostly gases at room temperature except carbon and sulfur.

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Answer:

20,075 g

Explanation:

Solution at attachment box

Firstly i found the mole of HCLwhich we needed

After that I found the gram of HCL which we needed

M.V=n

The mass of hydrogen chloride present in 50. mL of 11 M HCl solution is 20.08g. Details about mass can be found below.

The mass of a substance can be calculated by multiplying the number of moles of the substance by its molar mass.

However, the number of moles of Hydrogen chloride must be calculated first as follows:

Molarity = no of moles/volume

no of moles = 11M × 0.05L

no of moles = 0.55mol

mass of HCl = 0.55 mol × 36.5g/mol

mass of HCl = 20.08g

Therefore, the mass of hydrogen chloride present in 50. mL of 11 M HCl solution is 20.08g.

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Answer:

15.32 days

Explanation:

From the question given above, the following data were obtained:

Half-life (t½) = 3.83 days

Original amount (N₀) = 225 g

Amount remaining (N) = 14.06 g

Time (t) =.?

Next, we shall determine the number of half-lives that has elapsed. This can be obtained as follow:

Original amount (N₀) = 225 g

Amount remaining (N) = 14.06 g

Number of half-lives (n) =?

N = N₀ / 2ⁿ

14.06 = 225 / 2ⁿ

Cross multiply

14.06 × 2ⁿ = 225

Divide both side by 14.06

2ⁿ = 225 / 14.06

2ⁿ = 16

Express 16 in index form with 2 as the base

2ⁿ = 2⁴

n = 4

Thus, 4 half-lives has elapsed.

Finally, we shall determine the time. This can be obtained as follow:

Half-life (t½) = 3.83 days

Number of half-lives (n) = 4

Time (t) =.?

n = t / t½

4 = t / 3.83

Cross multiply

t = 4 × 3.83

t = 15.32 days

Therefore the time for 225 g sample of Radon to decay to 14.06 g is 15.32 days

The de Broglie wavelength of an electron traveling at 1.59×105m/s is  0.4547 x 10⁻⁹ m.

The elementary electric charge of the electron is a negative one, making it a subatomic particle. Due to their lack of known components or substructure, electrons, which are part of the first generation of the lepton particle family, are typically regarded to be elementary particles.

The length scale at which a particle's wave-like characteristics are significant is indicated by its de Broglie wavelength. The symbol or dB is typically used to indicate the De Broglie wavelength. The de Broglie wavelength for a particle with momentum p is given by dB = hp.

λ = h/mv

Where,

λ = wavelength of electron

m = mass of electron = 9.11e-31 kg

v = speed of electron = 1.59 × 10⁵ m/s

h = constant

Therefore,

λ = (6.626x10⁻³⁴J-s) ÷  [(9.11e-31 kg) (1.59 x 10⁵ m/s)]

λ = 0.4547 x 10⁻⁹ m

Thus, The de Broglie wavelength of an electron traveling at 1.59×105m/s is  0.4547 x 10⁻⁹ m.

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Answer:

Chemical

Explanation:

Answer:

6.76 mol/L

Explanation:

A chemist prepares a solution 0.607 kg of calcium bromide by measuring out of calcium bromide into a 450. mL volumetric flask and filling the flask to the mark with water. Calculate the concentration in mol/L of the chemist's calcium bromide solution. Be sure your answer has the correct number of significant digits.

Step 1: Given data

Step 2: Calculate the moles of solute

The molar mass of calcium bromide is 199.89 g/mol.

607 g × 1 mol/199.89 g = 3.04 mol

Step 3: Convert "V" to liters

We will use the conversion factor 1 L = 1000 mL.

450. mL × 1 L/1000 mL = 0.450 L

Step 4: Calculate the concentration of calcium bromide in mol/L

[CaBr₂] = 3.04 mol/0.450 L = 6.76 mol/L

The volume of \(N_2O_5\) needed to produce 9.64 L of \(NO_2\) is 4.97 L, calculated using stoichiometry and the ideal gas equation.

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Since the car is being acted upon by balanced forces, the car is at rest. as the forces are being balanced.

Force is defined as a cause which is capable of changing the motion of an object. It can cause an object which has mass to change it's velocity. It is also simply a push or a pull . It has both magnitude as well as direction.Hence, it is a vector quantity.

It has SI units of Newton and is represented by'F'.Newton's second law states that force which acts on an object is equal to momentum which changes with time. If mass of object is constant, acceleration is directly proportional to net force acting on an object.

The concepts which related to force are thrust and torque .Thrust increases the velocity of an object and torque produces change in rotational speed of an object.

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