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The mole fraction of hexane in the solution is approximately 0.584.

To determine the mole fraction of hexane in the solution, we can use Raoult's law, which states that the vapor pressure of a component in a mixture is equal to the product of its mole fraction and its vapor pressure in its pure state.

Let's assume the mole fraction of hexane in the solution is represented by x. The mole fraction of pentane can be calculated as (1 - x) since the sum of mole fractions in a mixture is always 1.

According to Raoult's law, we have the following equation for the vapor pressure of the mixture:

P_total = x * P_hexane + (1 - x) * P_pentane

Substituting the given values:

265 torr = x * 151 torr + (1 - x) * 425 torr

Now, let's solve for x:

265 torr = 151x + 425 - 425x

265 torr - 425 torr = -274x

-160 torr = -274x

x = (-160 torr) / (-274 torr)

x ≈ 0.584

Therefore, the mole fraction of hexane in the solution is approximately 0.584.

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The nuclear reactions for two steps that produces 125i and 124xe are:

¹²⁴Xe₅₄ + ¹n = ¹²⁵Xe₅₄       neutron

¹²⁵Xe₅₄ + ⁰e₋₁ = ¹²⁵I₅₃        electron capture

Product of electron capture by 125i

⁰e₋₁ = ¹²⁵Te₅₂

Nuclear reaction is defined as a process in which the nucleus of an atom is changed by being split apart or joined with the nucleus of another atom.

Let's see an important example of nuclear fission is the splitting of the uranium-235 nucleus when it is bombarded with neutrons. Various products can be obtained from this nuclear reaction. Another much important example of nuclear fission is the splitting of the plutonium-239 nucleus.

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Answer:

When two distinct elements are chemically combined—i.e., chemical bonds form between their atoms—the result is called a chemical compound. Most elements on Earth bond with other elements to form chemical compounds, such as sodium (Na) and Chloride (Cl), which combine to form table salt (NaCl).

True, an electron loses energy in the transition from a 4f subshell to a 6s subshell

Orbitals of lower energies fill up first. The pattern of filling is 1s, 2s, 2p, 3s, 3p, 4s, 3d, etc. An full subshell of a specific orbital type must be filled before going on to the next subshell with a higher energy level since all of the orbitals inside a subshell are degenerate (of equal energy).

The orbitals are filled in accordance with the (n+1) rule, which states that even if an orbit's n value is greater, the orbits with a higher (n+1) value will be filled first.

Here, the (n+1) of the 6s orbital is 6, whereas the (n+1) of the 4f orbital is 7, filling the 4f orbital before the 6s orbital.

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Answer:

It's importance is the fact that you cannot solve s situation if you don't know it's problem.

Explanation:

Problem identification or identifying a problem by scientist I a major and a key step in solving a problem.

I mean, if you don't identify a problem, there is no way you can think about the solution not to talk of getting the solution.

So identification of a problem is infact one of the major step a scientist must take to solve a situation.

It's importance is the fact that you cannot solve s situation if you don't know it's problem.

Answer:

1.1 mol of O2

Explanation:

First we need the balance chemical equation which is

2 H2O2 -------> 2 H2O + O2

This is important because in stoichiometry you can go from units of one thing to other by using mole ratios, here the mole ratio is 2 mol of H2O2  for one mole of O2.

\(2.2 mol H2O2 \frac{1mol O2}{2 mol H2O2}\) = 1.1 mol of O2

\(Ba(OH)_2\rightarrow \bold{\green{Barium\: hydroxide}}\)

\( Ca(OH)_2\rightarrow \bold{\red{Calcium\: hydroxide}} \)

\(RbOH \rightarrow \bold{\blue{Rubidium \:hydroxide}}\)

The type of reaction represented by the equation is replacement reaction.

A replacement reaction also known as displacement reaction is a reaction in which the ions of the reactant exchange to produce a new product. For example

AB + CD —> AD + CB

In the above reaction, we can see that D replaces B in the product which shows that the reaction is a replacement reaction.

NaCl + AgNO₃ → NaNO₃ + AgCl

In the above reaction, we can see that Cl replaces NO₃ in the product. This simply indicates that the reaction is a replacement reaction.

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The sign of q for this process is negative as heat is released into the surroundings when a sample of explosive TNT is detonated under atmospheric pressure.

When TNT(Trinitrotoluene) is detonated under atmospheric pressure, it undergoes an exothermic reaction which releases a large amount of heat and gas. This process is highly exothermic and releases energy in the form of heat, light, and a shock wave. The force exerted by the air on the surface above it is called Atmosphere Pressure. Atmospheric pressure is measured using a device called barometer. The standard atmosphere is a unit of pressure given by 101,325 Pa, which is equivalent to 1013.25 millibars, 760 mm Hg, 29.9212 inches Hg, or 14.696 psi.

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The final temperature, in degrees Celsius, of the gas is 34.62 °C

From the question, we are to determine the final temperature, in degrees Celsius

From the Pressure law or Gay-Lussac's law

We have that, for a given mass and constant volume of an ideal gas, the pressure exerted on the sides of its container is directly proportional to its absolute temperature.

Using the formula,

\(\frac{P_{1} }{T_{1}} = \frac{P_{2} }{T_{2}}\)

Where P₁ is the initial pressure

T₁ is the initial temperature

P₂ is the final pressure

and T₂ is the final temperature

From the given information,

P₁ = 739 mmHg

T₁ = 23 °C = 23 + 273.15 = 296.15 K

P₂ = 768 mmHg

T₂ = ?

Putting the parameters into the formula, we get

\(\frac{739}{296.15}=\frac{768}{T_{2} }\)

Then,

\(T_{2} = \frac{768 \times 296.15}{739}\)

T₂ = 307.77 K

Therefore,

T₂ = 307.77 - 273.15 = 34.62 °C

Hence, the final temperature, in degrees Celsius, of the gas is 34.62 °C

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Here is the complete question:

A gas sample has a pressure of 739 mmHg when the temperature is 23 °C. What is the final temperature, in degrees Celsius, when the pressure is 768 mmHg, with no change in the volume or amount of gas?

Answer: Copper is purified by electrolysis . Electricity is passed through solutions containing copper compounds, such as copper(II) sulfate. The anode (positive electrode ) is made from impure copper and the cathode (negative electrode) is made from pure copper. Pure copper forms on the cathode.

In a system, there are 2 singly linked lists. Another of the linked lists' end nodes was accidentally linked to a second list, creating an inverted E s list. Create a program to find the intersection of two linked lists.

The head of both the linked list is the first node. The value of said neck points to NULL if somehow the link list is empty. In a list, each node has at least two components:

The head of a list refers to the point at which a linked list can be accessed. Head is not an distinct node, it should be highlighted.

Items that show up in the same location in two related circumstances are said to be corresponding objects. Angles are a common example, as demonstrated here. Because they are located in the same spot in the two related shapes, angle A here on left corresponds to angle K on the right. We claim K is the equivalent of A.

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Answer:

A. 15

Explanation:

From the equation we see that 6 water particles are used to make 1 particle of the hexose.

That means, that to make 1 mole of the hexose, we need 6 moles of water (as a mole is an unit of count of particles).

To make 2.5moles of the hexose, we need 2.5*6 moles of water, so 15 moles of water.

The calculated molar mass of 32 g/mol is the same as the molar mass of oxygen. Thus, the gas is O2.

Let us determine the molar mass of this gas. We can begin with the density of the gas as follows:

Density = mass/volume
Density = 0.96 g/0.672 L

Density = 1.43 g/L

We know that at STP (standard temperature and pressure), temperature is 0°C and pressure is 1 atm. We can use these values to determine the molar volume of a gas, which is 22.4 L.

Molar volume = 22.4 L at STP
Thus,
1 mole of gas occupies 22.4 L at STP

We can determine the number of moles of the gas as follows:

Number of moles = volume/molar volume
Number of moles = 0.672 L/22.4 L/mol
Number of moles = 0.03 mol

The molar mass can be determined using the following formula:
molar mass = mass/number of moles
molar mass = 0.96 g/0.03 mol
molar mass = 32 g/mol

The calculated molar mass of the gas is 32 g/mol. Now let us compare this molar mass with the molar mass of the given gases.
Oxygen (O2) has a molar mass of 32 g/mol

The calculated molar mass of 32 g/mol is the same as the molar mass of oxygen. Therefore, the identity of the gas is O2.

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Answer:

More freely moving than a solid

Explanation:

Answer:

Chloroform has a boiling point of 61.15 degrees Celsius and a vapor pressure of 9.5 kPa at 20 degrees Celsius. Glycerol, on the other hand, has a boiling point of 290 degrees Celsius and a vapor pressure of 0.0002 kPa at 20 degrees Celsius. Therefore, chloroform has a much lower boiling point and a much higher vapor pressure than glycerol. This means that chloroform is more volatile and evaporates more easily than glycerol.

Explanation:

Chloroform has a boiling point of 61.15 degrees Celsius and a vapor pressure of 9.5 kPa at 20 degrees Celsius. Glycerol, on the other hand, has a boiling point of 290 degrees Celsius and a vapor pressure of 0.0002 kPa at 20 degrees Celsius. Therefore, chloroform has a much lower boiling point and a much higher vapor pressure than glycerol. This means that chloroform is more volatile and evaporates more easily than glycerol.

The changes occur in reaction are the bond in H₂ is broken, and new bonds are formed between hydrogen and oxygen atoms.

Hydrogen bond is a type of chemical bond which is formed between the hydrogen atom and more electronegative atom due to high dipole interaction.

Given chemical reaction is:

2H₂ + O₂ → 2H₂O

In the above reaction hydrogen nucleus not loses proton inspite of that it was broken and new bond formation takes place in water.

Despite the fact that oxygen atoms attract electrons from hydrogen atoms, oxygen atoms do not gain electrons.

In the water molecule each electron of both hydrogens is shared with an oxygen atom.

As a result, in the preceding equation, the hydrogen molecule's bond is broken, a new bond is formed, and each hydrogen atom's electron is shared with an oxygen atom.

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Answer:

c and d on edge 2022

Explanation:

Electrons tend to occupy the lowest available energy level.

This is in accordance with the Aufbau principle, which states that electrons fill orbitals in order of increasing energy levels. Electrons prefer to occupy lower energy orbitals because they are more stable, and therefore, require less energy to maintain their current state. The electron configuration of an atom describes the arrangement of its electrons in various orbitals.

The energy levels of electrons in atoms are described using the principal quantum number (n). The first energy level (n = 1) is the lowest energy level, and it is closest to the nucleus. As the value of n increases, so does the energy level of the electron, and the distance from the nucleus increases as well. In summary, electrons tend to occupy the lowest available energy level because they are more stable and require less energy.

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Answer:

Mass = 5013.36 g

Explanation:

Given data:

Number of moles of CsPO₄ = 22 mol

Mass of sample = ?

Solution:

Formula:

Mass = number of moles × molar mass

Molar mass of CsPO₄ = 132.91×1 + 30.97×1 +16×4 = 227.88 g/mol

by putting values,

Mass = 22 mol ×  227.88 g/mol

Mass = 5013.36 g

Answer: it has full valence shells

Explanation: Hope this is it

Answer:

Neon, along with helium, argon, krypton and xenon, make up the group known as noble gases. These are the most stable and least reactive elements due to having full valence shells (the outer shell has the max number of electrons, two for helium, eight for the rest).

Explanation:

Hope it helps

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Tori

Answer:

C. N₂O₄ → N₂ + 2O₂

General Formulas and Concepts:

Chemistry - Reactions

Explanation:

Step 1: Define

N₂O₄ decomposes into N₂ and O₂

Step 2: RxN

Unbalanced RxN:   N₂O₄ → N₂ + O₂

Balanced RxN:   N₂O₄ → N₂ + 2O₂

Answer:

CO2 will form

Explanation:

come here ukg-qixc-yjg

The question requires us to calculate the molecular mass of a gas, given its density (1.2 g/L) and conditions of pressure (745 torr) and temperature (20°C).

Density is defined as the mass of a compound over its volume. From this definition, we can calculate the molecular mass of the gas knowing the density, as given by the question, and the volume of 1 mol of the gas.

We can calculate the volume of a gas considering the equation of Ideal Gases:

where P is the pressure of the gas, V is its volume, n is the number of moles, R is the constant of gases and T is the temperature.

Note that the constant of gases R was given in units of L.atm/K.mol, while the pressure and temperature were given in Torr and °C, respectively. Thus we need to convert these values to the appropriate units.

Knowing that 1 Torr corresponds to 0.00131579 atm:

1 Torr --------------------- 0.00131579 atm

745 Torr ---------------- x

Solving for x, we have that 745 Torr corresponds to 0.980 atm.

To convert the temperature from Celsius degrees to Kelvin, we must add 273.15:

T = 20 + 273.15 K = 293.15 K

Therefore, the pressure and temperature we'll use in our calculation are 0.980 atm and 293.15 K. Also, since we are calculating the molecular mass, we'll consider 1 mol of gas.

Rearranging the equation of ideal gases to calculate the volume and applying the values to the equation, we'll have:

Therefore, the volume of 1 mol of the gas under the conditions given is 24.6L.

Next, we'll use this value to calculate the molecular mass using the density given by the question:

Therefore, the gas given by the question presents 29.5g per mol.

the second one is equal and opposite

            Precipitate definition (Entry 2 of 3) 1: a substance that has been physically or chemically isolated from a solution or suspension, typically in the form of an insoluble crystalline or amorphous solid. 2: a byproduct, outcome, or result of a procedure or action. adjective. precipitate.

Precipitation Illustration

        Silver chloride will solidify out of solution when silver nitrate and sodium chloride are combined in water. Silver chloride is the precipitate in this instance.

       Solids are created by the process of precipitation after two chemicals react. The downword () arrow symbol is used to represent the production of precipitate in this type of reaction.

      It happens between the reactant ions in the aqueous solutions that give rise to the material. Complete response: Precipitation includes the following: snow, sleet, hail, and rain.

       An excess of the light blue precipitate dissolves to create an inky transparent solution. A little amount of sodium hydroxide solution and subsequently an excessive amount are added to solution W. There develops an insoluble white precipitate.

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