arrange these alkyl iodides according to decreasing rates of their sn1 reactions.

a) The explosiveness of hydrogen gas is a chemical property.

b) The bronze color of copper is a physical property.

c) The shiny appearance of silver is a physical property.

d) The ability of dry ice to sublime (change from solid directly to vapor) is a physical property.

Chemical properties are properties that describe the behavior of a substance during a chemical reaction or a chemical change. Explosiveness of hydrogen gas is an example of a chemical property because it describes how hydrogen gas reacts with oxygen to form water and how the reaction releases a large amount of energy in the form of an explosion.

Physical properties, on the other hand, are properties that describe the characteristics of a substance that can be observed or measured without changing the composition of the substance. Examples of physical properties include the color, texture, and melting point of a substance. The bronze color of copper and the shiny appearance of silver are both examples of physical properties.

The ability of dry ice to sublime (change from solid directly to vapor) is also a physical property because it describes a physical change that occurs when dry ice is heated or exposed to high pressure.

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Based on the data given, the molar concentration of chloride ion in the resulting solution is 0.283 M.

Given data :

Volume of NaCl solution, V₁ = 34.0 mL = 0.034 L

Volume of MgCl2 solution, V₂ = 60.0 mL = 0.0600 L

Concentration of NaCl, C₁ = 0.15 M

Concentration of MgCl2, C₂ = 0.36 M

Step-by-step solution:

As per the law of Conservation of mass, no. of moles of Cl ion in the final solution must be equal to the sum of moles of Cl ion in NaCl and MgCl2 solutions.

Let n₁ = no. of moles of Cl in NaCl solution and n₂ = no. of moles of Cl ion in MgCl2 solution

n₁ = C₁V₁ = 0.15 M × 0.0340 L

=> n₁ = 0.00510 mol

n₂ = C₂V₂ = 0.36 M × 0.0600 L

=> n₂ = 0.0216 mol

Total number of moles = n₁ + n₂

= 0.00510 mol + 0.0216 mol

=> total no of moles = 0.0267 mol

Total volume of the final solution = V = V₁ + V₂

= 0.0340 L + 0.0600 L

=> V = 0.0940 L

=> Molar concentration of chloride ion in the final solution = n / V= 0.0267 mol / 0.0940 L= 0.283 M

Therefore, the molar concentration = 0.283 M.

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Answer:

Triskaidekaphobia, or fear of the number 13, does not fit neatly into a clinical definition of a specific phobia. The number 13 is not an object or a situation, and it can be impossible for the sufferer to avoid.

Explanation:

Answer: nitrogen

Explanation:

Answer:its a chemixal change because  there are stuff getting mixed togehter making it a chemiacl change

Explanation:

Protons (H⁺) are pumped across the inner mitochondrial membrane as part of the process called electron transport chain, which is an essential step in cellular respiration.

The electron transport chain is responsible for generating adenosine triphosphate (ATP), the main energy currency of cells.

During cellular respiration, electrons are transferred from high-energy molecules (such as glucose) through a series of electron carriers embedded in the inner mitochondrial membrane. As electrons pass through the electron transport chain, energy is released and used to pump protons (H⁺) from the mitochondrial matrix to the intermembrane space.

There are some several reasons;

Establishing an Electrochemical Gradient; The pumping of protons across the inner mitochondrial membrane creates an imbalance of protons, resulting in a higher concentration of protons in the intermembrane space compared to the matrix.

Generation of ATP; The electrochemical gradient created by the proton pumping is utilized by ATP synthase, an enzyme complex embedded in the inner mitochondrial membrane.

Coupling Electron Transport with Proton Pumping; The pumping of protons across the inner mitochondrial membrane is coupled with the flow of electrons through the electron transport chain.

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The product obtained when benzene is treated with HNO₃/H₂SO₄ followed by Zn, HCl, heat, followed by NaOH is phenol.

Treatment of benzene with HNO₃/H₂SO₄ (nitration):

In the presence of a mixture of concentrated nitric acid (HNO₃) and concentrated sulfuric acid (H₂SO₄), benzene undergoes nitration. The nitronium ion (NO₂+) is formed, which attacks the benzene ring, resulting in the substitution of a hydrogen atom with a nitro group (NO₂). The product formed in this step is nitrobenzene.

Reduction of nitrobenzene using Zn and HCl (reduction):

Nitrobenzene can be reduced to aniline using zinc (Zn) and hydrochloric acid (HCl). This reaction results in the removal of the nitro group (NO₂) and the addition of hydrogen (H) to the benzene ring. The product formed in this step is aniline.

Heating aniline with NaOH (alkaline fusion):

When aniline is heated with sodium hydroxide (NaOH), a process called alkaline fusion, the benzene ring undergoes a ring-opening reaction. This results in the formation of sodium phenoxide, which can be acidified to give the final product, phenol.

So, the product obtained after treating benzene with HNO₃/H₂SO₄ followed by Zn, HCl, heat, followed by NaOH is phenol.

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Answer:

Explanation:

The speed of the jet can be found by using the formula

\(v = \frac{d}{t} \\ \)

d is the distance

t is the time taken

From the question we have

\(v = \frac{395000}{9000} = \frac{395}{9} \\ = 43.8888...\)

We have the final answer as

Hope this helps you

Reactivity decreases as you move from left to right. The farther to the left and down the periodic chart you move, easier it is for electrons to be given or taken away, hence resulting in higher reactivity.

Reactivity decreases as we move down the column. As you learn more about the table, you will be able to find that this pattern is true for other families.

The atoms get bigger, as the atomic number increases. The chemical properties change slightly when compared to the element right above them on the table. The non-metal elements in Group 7 that are known as the halogens, get less reactive as you move to the down of the group.

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Answer:

It's explained below.

Explanation:

An everyday situation is when we raise an object.

Now, when we raise an object, energy is transferred to the Earth object system and thus the gravitational field energy of the system will increase.

Now, this energy is usually released when the object falls. The mechanism of this release is known as gravitational force.

In the same manner, two magnetic and electrically charged objects that are interacting at a distance will exert forces on each other and this can lead to transfer of energy between the interacting objects.

Answer:

24

Explanation:

The complete nuclear equation is;

253/99 Es + 4/2He → 256/101 Md + 1/0n

The atomic and mass numbers of the particles involved are displayed in a nuclear equation, which is a symbolic depiction of a nuclear process. It is used to explain the alterations that take place inside atomic nuclei during nuclear reactions, such as radioactive decay, fusion, and fission.

Typically, nuclear equations have two sides that are divided by an arrow. On the left side of the arrow are the reactants, or initial particles, and on the right side are the products, or final particles. The arrow denotes the process of transformation or reaction.

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Answer:

The combined gas law states that the pressure of a gas is inversely related to the volume and directly related to the temperature. If temperature is held constant, the equation is reduced to Boyle's law. Therefore, if you decrease the pressure of a fixed amount of gas, its volume will increase.

Explanation:

Answer:

D. The volume increases.

Explanation:

100%

Refer to the attachment

Answer:

92

98

35

35

Explanation:

Answer: Because the gas is collected over water, it is not pure but is mixed with vapor from the evaporation of the water. Dalton’s law can be used to calculate the amount of the desired gas by subtracting the contribution of the water vapor.

In order to solve a problem, it is necessary to know the vapor pressure of water at the temperature of the reaction (see Table below). The sample problem illustrates the use of Dalton’s law when a gas is collected over water.

Vapor Pressure of Water (mmHg) at Selected Temperatures (°C)

0 5 10 15 20 25 30 35 40 45 50 55 60 65 70

4.58 6.54 9.21 12.79 17.54 23.76 31.82 42.18 55.32 71.88 92.51 118.04 149.38 187.54 233.7

Sample Problem: Gas Collected by Water Displacement

A certain experiment generates 2.58 L of hydrogen gas, which is collected over water. The temperature is 20°C and the atmospheric pressure is 98.60 kPa. Find the volume that the dry hydrogen would occupy at STP.

Step 1: List the known quantities and plan the problem.

Known

Unknown

The atmospheric pressure is converted from kPa to mmHg in order to match units with the table. The sum of the pressures of the hydrogen and the water vapor is equal to the atmospheric pressure. The pressure of the hydrogen is found by subtraction. Then, the volume of the gas at STP can be calculated by using the combined gas law.

Step 2: Solve.

Now the combined gas law is used, solving for

, the volume of hydrogen at STP.

Step 3: Think about your result.

If the hydrogen gas were to be collected at STP and without the presence of the water vapor, its volume would be 2.28 L. This is less than the actual collected volume because some of that is water vapor. The conversion using STP is useful for stoichiometry purposes.

Summary

The vapor pressure due to water in a sample can be corrected for in order to get the true value for the pressure of the gas.

Review

Why is gas collected over water not pure?

Why would we want to correct for water vapor?

In a lab, 2.20 L of gas is collected over water at a temperature of 30°C and a total pressure of 735.43 mmHg. Find the volume that the dry nitrogen of gas would occupy at STP.

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Use the resource below to answer the questions that follow.

Fatty acid groups are referred to as B) acyl groups.

Fatty acids are organic compounds that consist of a long hydrocarbon chain with a carboxyl group (-COOH) at one end. The hydrocarbon chain is composed of carbon and hydrogen atoms, and its length can vary. Fatty acids play essential roles in various biological processes and are major components of lipids, including triglycerides and phospholipids.

When a fatty acid is involved in chemical reactions or is attached to other molecules, it typically undergoes a process called activation, where it is converted into an acyl group. An acyl group is formed by replacing the -OH (hydroxyl) group of the carboxyl group with an -OR (alkoxy) group. The -OR group can be derived from various molecules, such as coenzyme A (CoA) or other acyl carrier proteins.

For example, when a fatty acid is activated for incorporation into a triglyceride molecule, it forms a triglyceride acyl group. Similarly, when a fatty acid is incorporated into a phospholipid molecule, it forms a phospholipid acyl group. The acyl group represents the hydrocarbon chain of the fatty acid, which may vary in length and saturation.

Therefore, the correct answer to the question is B) Acyl.

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The number of mole present in 87 grams of potassium bromide, KBr is 0.731 mole

We'll begin our calculation by obtaining the molar mass of potassium bromide, KBr. Details below:

Molar mass of potassium bromide, KBr = K + Br

Molar mass of potassium bromide, KBr = 39 + 80

Molar mass of potassium bromide, KBr = 119 g/ mol

Finally, we shall determine the number of mole present. Details below:

Mole = mass / molar mass

Mole of potassium bromide, KBr = 87/ 119

Mole of potassium bromide, KBr = 0.731 mole

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Complete question:

How many moles are in 87g of potassium bromide?

The central atom in AIF3 is aluminum (Al). The hybridization of aluminum in AIF3 is sp3. This means that the aluminum atom has combined its 3p and 3s orbitals with one of its 3d orbitals to form four hybrid orbitals that are arranged in a tetrahedral shape. the hybridization of the central atom (Aluminum) in AlF3 is sp².

In AlF3, the central atom is aluminum (Al). To determine its hybridization, we'll follow these steps:
1. Determine the number of valence electrons for the central atom (Aluminum). Aluminum has 3 valence electrons.
2. Count the number of atoms bonded to the central atom (Aluminum). In AlF3, there are 3 fluorine (F) atoms bonded to the central aluminum atom.
3. Calculate the total number of electron groups around the central atom. In this case, there are 3 bonding pairs (from the 3 F atoms) and 0 lone pairs, so the total is 3 electron groups.
4. Determine the hybridization based on the total number of electron groups. For 3 electron groups, the hybridization is sp².
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Option A is the correct answer: A negative change in entropy indicates that the system has become more ordered.

What is Entropy?

Entropy is a thermodynamic property that describes the degree of disorder or randomness in a system. It is a measure of the number of ways in which the energy of a system can be distributed among its particles. The greater the number of possible arrangements, the higher the entropy of the system.

It is denoted by the symbol S and is measured in units of joules per Kelvin (J/K).

A negative change in entropy indicates that the system has become more ordered. .If the entropy decreases, it means that the system has become more ordered or less random.

For example, when a gas condenses into a liquid, the particles become more ordered and the entropy decreases. Similarly, when a crystal forms from a solution, the molecules become more ordered and the entropy decreases. In both of these cases, the change in entropy is negative.

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Explanation:

Nature is what we think of as pre-wiring and is influenced by genetic inheritance and other biological factors.

Nurture is generally taken as the influence of external factors after conception, e.g, the product of exposure, life experiences and learning on an individual.

The partial pressure of Xe is 2.60atm

The sum of the partial pressures is equal to the total pressure. Ptotal = P1 + P2 + P3... .To calculate the partial pressure of one of the components of a mixture, subtract the sum of known partial pressures of the other components from the total pressure.

Given the values of

PHe=0.20 atm

PAr=0.20 atm

Ptotal=3.00 atm

We need to find  PXe

Solution: Determine the sum of the partial pressures of helium and argon, then subtract the sum from the total pressure.

PHe+PAr =0.20 atm + 0.20=0.400 atm

PXe=3.00atm−0.400=2.60 atm

Each gas that makes up a mixture of gases has a partial pressure, which is the notional pressure of that gas as if it alone filled the original combination's complete volume at the same temperature.

According to Dalton's Law, a perfect gas mixture's total pressure equals the sum of its constituent gases' individual partial pressures.

The thermodynamic activity of a gas's molecules is gauged by its partial pressure.

Gases react, disperse, and dissolve based on their partial pressures rather than the concentrations they have in liquids or other gas combinations.

This general characteristic of gases holds true in biological chemical interactions involving gases.

Hence the partial pressure of Xe is 2.60atm

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From september 1 to june 1, the number of daylight hours observed each day in new york state will be option A: Decrease only.

The number of daylight hours observed each day in New York State will go down. This is due to the earth's tilt on its axis and its orbit around the sun, which causes the amount of daylight to change throughout the year.

In the northern hemisphere, the fall and winter months have shorter daylight hours than the spring and summer months. On September 1st, it is the start of fall, which means the days will start getting shorter.

Therefore, As we move towards June 1st, the days will continue to get shorter until we reach the shortest daylight hours of the year on the winter solstice (around December 21st or 22nd), after that the days will start getting longer again.

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Answer:

100 and 1 atm

Explanation:

I think the gas is given kinetic energy only from its temperature

Answer: a. BaO

Explanation:

For formation of a neutral ionic compound, the charges on cation and anion must be balanced. The cation is formed by loss of electrons by metals and anions are formed by gain of electrons by non metals.

Here element barium is having an oxidation state of +2 called as \(Ba^{2+}\) cation and \(O^{2-}\) is an anion with oxidation state of -2. Thus they combine and their oxidation states are exchanged and written in simplest whole number ratios to give neutral \(BaO\)