what are the list of catalysts that can be used for hydrogenation of nitrobenzene???​

The alkaline earth metal that has 5 shells are beryllium (Be), magnesium (Mg), calcium (Ca)

The alkaline earth metals  can be described as the elements hich could be beryllium, magnesium, calcium, strontium, barium, and radium.

It should be noted that these elements are beenregarded as the second most reactive metals  as far as the periodic table  table is concerned and they are the elemnts that posses the increasing reactivity  following the  higher periods. The electrons in the elements  can be seen as one that help to give electron address with respect to the capacity of the shells to occupy electrons.

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The atomic mass of gallium is approximately 69.8009 amu.

To find the atomic mass of gallium, we need to calculate the weighted average of the masses of its two isotopes, taking into account their relative abundances.

First, we calculate the contribution of each isotope to the atomic mass:

Contribution of gallium-69 = 68.9256 amu x 0.60108 = 41.4024 amu

Contribution of gallium-71 = 70.9247 amu x 0.39892 = 28.3985 amu

Then, we add these contributions to obtain the atomic mass of gallium:

Atomic mass of gallium = 41.4024 amu + 28.3985 amu = 69.8009 amu

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The cultures of prehistoric humans are primarily known through the excavation of stone tools and other durable artifacts, such as the Oldowan and Acheulian tool traditions.

Stone tools and imperishable artifacts serve as key archaeological evidence for understanding prehistoric cultures. Through meticulous excavation and analysis, archaeologists have been able to piece together the lifestyles, technological advancements, and social behaviors of early human societies. The term "paleolithic" refers to the Old Stone Age, a time when humans relied on stone tools as their primary implements.

The Oldowan tool tradition is considered the earliest stone tool industry, dating back around 2.6 million years ago. It is characterized by simple tools, such as choppers and scrapers, which were crafted by flaking off pieces from larger stones. These tools were primarily used for basic activities like butchering and processing animal carcasses.

Later, the Acheulian tool tradition emerged around 1.76 million years ago, representing an advancement in stone tool technology. Acheulian tools, such as handaxes and cleavers, were more refined and standardized, showcasing an increased level of sophistication in tool-making techniques. These tools served a wide range of purposes, including hunting, woodworking, and shaping raw materials.

By studying the Oldowan and Acheulian tool traditions, researchers gain valuable insights into the cognitive abilities, cultural development, and technological progress of early humans. The examination of these artifacts provides evidence of their adaptability, problem-solving skills, and the gradual refinement of their tool-making techniques over time.

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A substance has the chemical structure C4H9N. Compound is a saturated acyclic hydrocarbon if the index of hydrogen shortage is zero.

If everything went according to plan, you would have discovered that IHD = 4, which denotes a total of 4 rings and/or pi bonds. Pi bonds can form between two carbons (C=C, CC), two carbons and oxygen (C=O), two carbons and nitrogen (C=N, CN), two nitrogens (N=N), or two oxygen atoms (N=O). Any rings may or may not contain the N or O.

IHD=2(6)+2−62=4 I H D = 2 ( 6 ) + 2 − 6 2 = 4 . This supports the idea that benzene has one ring and three double bonds.

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Answer:

nbfuhbcuwcbevbeufvhev

Explanation:

jejfihfirhugv

0.0451 moles of KMnO4 and 7.18 grams of KMnO4 are required to produce 11.4 grams of KNO3.

The chemical equation for the reaction is

5 KNO₂ + 2KMnO₄ + 3 H₂SO₄ →5 KNO₃ + K₂SO₄ + MnSO₄ + 3 H₂O

From the equation, we see that for every 5 moles of KMnO2, 5 moles of KNO3 are produced, and for every 2 moles of KMnO4, 5 moles of KNO3 are produced.

Determine the number of moles of KNO3 produced, which can be calculated from the mass of KNO3 (11.4 g) and its molar mass (101.1 g/mol):

11.4 g KNO3 / 101.1 g/mol = 0.1129 moles KNO3

Since 5 moles of KMnO2 produce 5 moles of KNO3, 2 moles of KMnO4 produce 5 moles of KNO3.

This means that for every 0.1129 moles of KNO3, 0.1129 moles / (5/2) = 0.0451 moles of KMnO4 are required.

Convert the number of moles of KMnO4 to mass by multiplying by its molar mass (158.0 g/mol):

0.0451 moles KMnO4 * 158.0 g/mol = 7.18 g KMnO4

How do you convert moles to mass?

Multiply the molecular weight by the number of moles for the substance. The molecular weight is the number of grams per mole for the substance and gives the conversion factor for moles to grams for that particular substance.

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To determine the amount of water that boils away, we need to know the initial temperature of the solutions and calculate the amount of heat generated by the reaction and the heat required to raise the temperature of the solution and water to their boiling points.

The given chemical equation represents a neutralization reaction between hydrochloric acid (HCl) and potassium hydroxide (KOH) to form water (\(H_{2}O\)) and potassium chloride (KCl).

The reaction is exothermic, and the enthalpy change is -57.3 kJ/mol, indicating that heat is released during the reaction.

When 20 mL of 10 M HCl is mixed with 17 mL of 10 M KOH, they react completely to form water and KCl. The reaction generates heat, causing the temperature of the solution to increase.

However, some of the water produced may boil away if the temperature exceeds its boiling point.

To determine how much water boils away, we need to calculate the amount of heat generated by the reaction and compare it to the heat required to raise the temperature of the solution and the water to their boiling points.

Without knowing the initial temperature of the solutions, it is difficult to estimate how much water would boil away. However, we can assume that if the temperature of the solution reaches 100 ∘C, then all the water produced will boil away.

In summary, to determine the amount of water that boils away, we need to know the initial temperature of the solutions and calculate the amount of heat generated by the reaction and the heat required to raise the temperature of the solution and water to their boiling points.

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Answer:

see below

Explanation:

1. Heat energy is added to the substance, weakening the electrical attraction between molecules.

2. Both the melting point and boiling point are lower.

3. dipole

4. Water and ethanol have different molecular structures.

5. The lone pairs of electrons in the oxygen atom causes the molecule to be bent; the oxygen atom has a partial negative charge, while the hydrogen atoms have partial positive charges.

[quizlet: captncrun]

Heat is a form factor that changes the solid from light to light to gaseous mediums. The phases take place in a cyclic manner.

Hence the correct option is C.

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The speed of the 4 kg ball at the given position is approximately 1.21 m/s.

When a 4 kg ball swings in a vertical circle on the end of a 60 cm long string, and the tension in the string is 20 N when its angle from the highest point on the circle is θ = 30°, we can determine the centripetal force acting on the ball and its speed at that position.

First, let's convert the string length to meters: 60 cm = 0.6 m. At the given angle, we can use the following equation to find the centripetal force (Fc) acting on the ball:

Fc = T - mg * cos(θ)

where T is the tension (20 N), m is the mass of the ball (4 kg), g is the acceleration due to gravity (approximately 9.81 m/s²), and θ is the angle (30°).

Fc = 20 - 4 * 9.81 * cos(30°)

Fc ≈ 9.64 N

Now, we can find the speed (v) of the ball at that position using the centripetal force formula:

Fc = (m * v²) / r

where r is the radius (0.6 m).

Rearranging the formula to solve for v:

v = √(Fc * r / m)

v = √(9.64 * 0.6 / 4)

v ≈ 1.21 m/s

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Answer:

I'm pretty sure it's NaOH

Explanation:

I hope this helps :D

Answer: Equilibrium

Explanation:

The reactions which do not go on completion and in which the reactant forms product and the products goes back to the reactants simultaneously are known as equilibrium reactions.

For a chemical equilibrium reaction, equilibrium state is achieved when the rate of forward reaction becomes equals to rate of the backward reaction which means the products are being made as quickly as reactants

Equilibrium state is the state when reactants and products are present but the concentrations does not change with time.

Answer:

monke

Explanation:

because my mum told me we are all monke

To cause cancer, proto-oncogenes require 1 allele to be mutated and are therefore considered dominant.

Cancer is a group of diseases involving abnormal cell growth with the potential to invade or spread to other parts of the body. These contrast with benign tumors, which do not spread. Possible signs and symptoms include a lump, abnormal bleeding, prolonged cough, unexplained weight loss, and a change in bowel movements.While these symptoms may indicate cancer, they can also have other causes.Over 100 types of cancers affect humans.

Tobacco use is the cause of about 22% of cancer deaths. Another 10% are due to obesity, poor diet, lack of physical activity or excessive drinking of alcohol. Other factors include certain infections, exposure to ionizing radiation, and environmental pollutants.

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The pH of the solution is 1.38.

Mass of HCl = 614 mg = 0.614 g

Moles of HCl = 0.614g / 36.5 gmol⁻¹

Concentration of HCl :

Concentration=  moles/volume of solution in liters

On adding 0.01682 moles to 400 mL of water that 0.4 L of water.

[HCl]=0.01682 mol/0.4 L= 0.04205 M

HCl (s) + H₂O (l) → H₃O⁺ (aq) +Cl⁻

1 mole of HCl gives 1 mole of hydronium ion and 1 mole of chloride ions in an aqueous solution.

Then 0.04205 mol/L of HCl will give:

1x0.04205 M= 0.04205 mol/L of hydronium ions.

[H₃O⁺]= 0.04205 M

pH= -log[H₃O⁺]

pH= -log[0.04205 M]

    = 1.38

The pH of the solution is 1.38.

The complete question is- A chemist dissolves 614. mg of pure hydrochloric acid in enough water to make up 400 mL of solution. Calculate the pH of the solution. Round your answer to 3 significant decimal places. X 5 ?

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Answer:

3.96 x 1024 molecules

1 mole is equal to 6.023 × 10 ²³ molecules. 39.57 × 10 ²³ molecules are there in 230 grams of NH₄OH.

The term molar mass is defined as the mass in grams of one mole of a substance. It is represented by the symbol "M".

The mass (in grams) of one mole of a substance is known as its molar mass. You can calculate an element's molar mass by taking its atomic mass and multiplying it by the conversion factor grams per mole (g/mol).

The molar mass of NH₄OH is 35g/mol

1 mole = 35 grams

1 mole = 6.023 × 10 ²³ molecules

35 grams =  6.023 × 10 ²³ molecules

230 grams = ?

Number of molecules = weight / molar mass × 6.023 × 10 ²³

= 230 / 35 × 6.023 × 10 ²³

= 6.57 × 6.023 × 10 ²³

= 39.57 × 10 ²³ molecules

Thus, 39.57 × 10 ²³ molecules are there in 230 grams of NH₄OH.

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Answer:

Rock

Explanation:

We can make a 0.25 M solution with a volume of 200 mL from the stock solution.

We can use the dilution formula to fix this issue:

C1V1 = C2V2

where C1 and V1 represent the initial (stock) solution's concentration and volume, and C2 and V2 represent the end (diluted) solution's concentration and volume.

In order to write: "We want to determine the volume of a 0.25 M solution that can be created from the stock solution."

C2 = 0.25 M V2 =? where C1 = 1.00 M and V1 = 50 mL.

Using the dilution formula with these values as input, we obtain:

0.25 M x V2 = 1.00 M x 50 mL

If we simplify, we get:

50 mL = 0.25 M x V2

The result of dividing both sides by 0.25 M is:

V2 = 200 mL

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Answer:

Gravitational potential energy may be converted to other forms of energy, such as kinetic energy. If we release the mass, gravitational force will do an amount of work equal to mgh on it, thereby increasing its kinetic energy by that same amount (by the work-energy theorem).

Explanation:

Answer:

A push or pull is referred to as a force. Forces can cause objects to move, slow, stop, or change the direction in which they travel. The force of gravity, for example, pulls all objects toward the Earth's center. Every time two things interact, a force is exerted on each of them. When this happens, the two items no longer feel the force after the interaction ends.

Explanation:

Force is that external physical cause which changes or tends to change:

hope this helps you.

Answer:

The magnesium atom is larger.

Explanation:

The magnesium atom is larger because it is on the left side of the Periodic Table (period 3 and group 2) where the atomic radius is larger.

Atomic radius is the distance from the center of the nucleus of an atom to the most external electron shell.

The greater the columbic attractions, the closer the protons in the nucleus are to the electrons in the outer layers, making the size of the atom smaller.

Answer:

The answer is offspring

Explanation:

Butane exists in a liquid state inside a lighter because it is stored under high pressure, which causes its boiling point to decrease.

When butane is stored under high pressure in a lighter, it is forced to remain in a liquid state even at room temperature. Butane has a boiling point of -1°C at atmospheric pressure, which means that it will vaporize into a gas at temperatures higher than this point. However, when it is stored under pressure in a lighter, the pressure forces the boiling point to decrease, which means that butane will remain in a liquid state even at room temperature.

When you press the lighter's button, it releases the pressure on the butane, causing it to convert from a liquid to a gas and ignite with the help of a spark, creating a flame that you can use for various purposes.

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hope this answer helps and have a good day

the correct answer in this scenario. Providing oxygen can help alleviate the patient's respiratory distress and improve their oxygen saturation levels. However, it's important to assess the patient's airway and breathing before administering oxygen to ensure that it's safe to do so.
Your answer: (A) high-flow oxygen.

The first thing you need to do when treating any patient is to perform a primary assessment, which includes checking the patient's airway, breathing, and circulation. In this case, the patient is experiencing slight respiratory distress, so your first priority should be to address their breathing.

Option B, an immediate head-to-toe trauma assessment, is not the best first step in this scenario because the patient is experiencing respiratory distress. While it's important to assess the patient for any other injuries or medical conditions, addressing their breathing should be the first priority.

Option C, transport to the local trauma center, may be necessary if the patient's condition worsens or if they require additional medical care. However, before transporting the patient, you should stabilize their breathing and perform a more thorough assessment to determine if there are any other injuries or medical conditions that require immediate attention.

Option D, insertion of a supraglottic airway, may be necessary if the patient's respiratory distress is severe and other measures, such as high-flow oxygen, are not effective. However, it's important to assess the patient's airway and breathing before inserting any kind of airway device to ensure that it's safe to do so.

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Answer:

During electron transport, energy from electron carriers (NADH and FADH₂) is used to pump hydrogen ions into the intermembrane space.

The answer for the first part may also be electrons since they are the literal source of the energy. Electrons are stored in the electron carriers.

A sample 0. 100 moles of a gas is collected at at STP . 2.24 is the volume of the gas in liters.

The STP means standard temperature and pressure.

At STP,

Temperature = 0 °C =273 K

Pressure = 1 atm

We get value of volume by using ideal gas equation,

PV = nRT

Calculation,

Since, one mole of a gas occupy 22.4 L volume at STP

So, for 0.1 mole volume occupy = 22.4L × 0.1 mole/1 mole =  2.24L

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Answer: The molecular formula will be \(C_6H_6O\)

Explanation:

Molecular formula is the chemical formula which depicts the actual number of atoms of each element present in the compound.  

Empirical formula is the simplest chemical formula which depicts the whole number of atoms of each element present in the compound.

The empirical formula is \(C_6H_6O\)

The empirical weight of \(C_6H_6O\) = 6(12)+6(1)+1(16) = 94 g.

The molecular weight = \(2\times \text{vapour density}=2\times 47=94\)

Now we have to calculate the molecular formula.

\(n=\frac{\text{Molecular weight}}{\text{Equivalent weight}}=\frac{94}{94}=1\)

The molecular formula will be=\(1\times C_6H_6O=C_6H_6O\)

Molar mass of Cu = 6.45x10^25 atoms.

The molar mass of Cu = 63.55g/mol.

Mass of Cu= ?

Thus, Mass of cu= Molar mass of Cu / The molar mass of Cu

                             = 6.45x10^25 atoms/ 63.55g/mol.

                              = 0.176 g

The chemical element copper has the atomic number 29 and the letter Cu, which comes from the Latin word cuprum.

It is an extremely high thermal and electrical conductivity metal that is soft, malleable, and ductile. Pure copper has a pinkish-orange tint when it is first exposed to the air.

Thus, Molar mass of Cu = 6.45x10^25 atoms.

The molar mass of Cu = 63.55g/mol.

Mass of Cu= ?

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