3.5 kg = 9Dimensional AnalysisRatio:ProportionFormula Method9kgxg=IIkg19

The reaction between CO and H₂ to produce methane and water is exothermic with a change in enthalpy of -206 kJ/mol.

The given process is known as coal gasification, and it involves two stages: the first stage is the partial combustion of coal to produce carbon monoxide, and the second stage is the reaction between CO and H₂ to produce methane and water. The enthalpy change for the second stage can be calculated using the enthalpies of formation of the reactants and products, which are provided.

The enthalpy change for the reaction is -206 kJ/mol, indicating that the reaction is exothermic and releases heat. This information is useful for designing and optimizing coal gasification processes, as it provides insight into the energy requirements and potential efficiency of the process.

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The carbonyl stretching frequency in the infrared spectrum depends on the nature of the carbonyl group and the adjacent functional groups or substituents. Based on this, we can rank the given molecules in terms of their carbonyl stretching frequency, from highest to lowest:

2,4-cyclohexadienone > 2-cyclohexenone > cyclohexenone > cyclohexanone

In general, a carbonyl group adjacent to an electron-withdrawing group will have a higher stretching frequency compared to a carbonyl group adjacent to an electron-donating group.

In 2,4-cyclohexadienone, the two carbonyl groups are conjugated with each other and with the double bonds in the ring, resulting in a very high carbonyl stretching frequency. In 2-cyclohexenone, the carbonyl group is conjugated with the double bond in the ring, resulting in a slightly lower stretching frequency.

In cyclohexenone, the carbonyl group is adjacent to a single double bond in the ring, resulting in a lower stretching frequency compared to 2-cyclohexenone. In cyclohexanone, the carbonyl group is not conjugated with any other functional group, resulting in the lowest carbonyl stretching frequency among the given molecules.

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Answer:

210 grams

Explanation:

just add them all up

Answer:

Burning Paper

Explanation:

Burning Paper is an example of a chemical change because;

-  A new substance called  ''Ash'' is formed.

- It is an irreversible reaction.

Answer:

The pressure exerted by a gas is due to the random motion of particles in the gas. Gases have weak intermolecular forces and the particles are in continuous random motion and these particles collide with the walls of the container. These collisions with the walls of the container exert pressure on the gas.

Explanation: Hope this helps!!

Answer:

tigers eyes

Explanation:

Answer:

CH3CH3, 1,3- dichloro-2,2- dibromo, 2-butyne, cyclopentane, 2,3- dimethylbut-2-ene, 2,2,4,4- tetramethlpenta-3-one.

Explanation:

This problem or question has to do with spectroscopy. Spectroscopy is one of the Important aspect of physical Chemistry. It is important because it helps in the identification of chemical samples or compounds. The Nuclear Magnetic field work generally on the principle of absorption of energy.

The following compounds as given in the question above shows singlet in the 1H NMR spectrum.

(1). CH3CH3: shows singlet in the 1H NMR spectrum at 0.86 ppm.

(2). 1,3- dichloro-2,2- dibromo; shows singlet.

(3). 2- butyne shows singlet

(4). Cyclopentane shows singlet.

(5). 2,3 - dimethylbut-2-ene shows singlet.

(6). 2,2,4,4- tetramethlpenta-3-one shows singlet.

Kindly note that I have used the IUPAC naming system to name the Compounds in the question above.

Answer:

Ionic radius increases down the group, therefore Li+ ion has the smallest ionicsize out of the three ions.

The formula for the time (t) it will take for perfume molecules to diffuse a distance (l) into the room can be derived as follows: t = (l^2) / (6D), where D is the diffusion coefficient.

Diffusion is the process by which molecules spread out from an area of high concentration to an area of low concentration. In this case, we are considering the diffusion of perfume molecules into the room. To derive a formula for the time it takes for diffusion to occur, we need to consider the factors that affect the rate of diffusion.

The time it takes for molecules to diffuse a distance (l) can be related to the diffusion coefficient (D), which is a measure of how quickly molecules move and spread out. The formula for the time (t) can be derived using the equation t = (l^2) / (6D), where (l^2) represents the squared distance traveled and 6D represents the diffusion coefficient.

The diffusion coefficient depends on various factors, including the mass (m) and collision cross-section (σ) of the perfume molecules, as well as the pressure (p) and temperature (t) of the environment. By assuming that the mass and collision cross-section of the perfume molecules are similar to air molecules, we can consider them to be constant in the formula.

It's important to note that this derived formula is a simplification and assumes ideal conditions. Real-world diffusion processes may involve additional factors and complexities. However, the derived formula provides a starting point for understanding the relationship between diffusion time, distance, and the diffusion coefficient.

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This law states that matter can neither be created nor destroyed in an ordinary chemical reaction, but can change from one form to another.

What this implies is that when two elements or compound combine as a reactant to form a product, there's no loss of matter and the mass of the reactants must be equal to the mass of the product.

Given that

AlBr₃ + K₂SO₄ → KBr + Al₂(SO₄)₃

If we look closely at the above reaction, we would see that aluminuim is not balanced, potassium is also not balanced, bromine is not balance as well as sulphur and oxygen.

Let's put two moles attached to the AlBr₂ and three moles of K₂SO₄

2AlBr₃ + 3K₂SO₄ →

This would give us

6KBr + Al₂(SO₄)₃

If we add the two equations together,

2AlBr₃ + 3K₂SO₄ → 6KBr + Al₂(SO₄)₃

From the above, we have

2 atoms of Al on the reactant side and 2 atoms of Al on the product side

6 atoms of Br on the reactant side and 6 atoms of Br on the product side

6 atoms of K on the reactant side and 6 atoms of K on the product side

3 atoms of S on the reactant side and 3 atoms of S on the product side

12 atoms of O on the reactant side and 12 atoms of O on the product side

Using the change of base rule to find the logarithm to four decimal places. the correct answer is 11.4235.

To find the logarithm of 143.2 using the change of base rule, we can choose any base we prefer. Let's use base 10 and natural logarithm (base e) for this calculation.

First, we'll use the change of base formula, which states that log(base b) x = log(base c) x / log(base c) b. In this case, we'll calculate log(base 10) 143.2.

We'll use the natural logarithm (ln) as our intermediary step. The natural logarithm of 143.2 can be calculated as ln(143.2).

Using a calculator, we find that ln(143.2) is approximately 4.9628.

Next, we need to calculate log(base 10) e, which is the logarithm of e with base 10. Using a calculator, we find log(base 10) e is approximately 0.4343.

Finally, we apply the change of base formula:

log(base 10) 143.2 ≈ ln(143.2) / log(base 10) e
                ≈ 4.9628 / 0.4343
                ≈ 11.4235

Rounding to four decimal places, the logarithm of 143.2 using base 10 is approximately 11.4235.

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The correct statement about the buddy system for allocating memory is:

C. With the buddy system, memory segments can be either divided or coalesced to satisfy an allocation request.

The buddy system is a memory allocation technique used in operating systems. It divides memory into fixed-size blocks or segments, typically in powers of two. When a memory allocation request is made, the system looks for a free block of suitable size. If the block is larger than required, it can be divided or split into smaller blocks to satisfy the request. Conversely, if adjacent blocks are free, they can be coalesced or merged to form a larger block for allocation.

A. The buddy system is not specifically designed for quickly allocating pages on demand for user-space applications. It is a general memory allocation strategy used in various contexts.

B. The buddy system may still result in internal fragmentation. Internal fragmentation occurs when allocated memory blocks are slightly larger than the requested size, leaving unused space within the block.

D. The buddy system does not guarantee physically contiguous memory allocation. It can allocate memory from different available blocks, which may or may not be physically contiguous.

Therefore, the only true statement is C. With the buddy system, memory segments can be either divided or coalesced to satisfy an allocation request.

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2.56 moles of HCl are required to react with 0.64 moles of KMnO4.

The balanced chemical equation is given as;2KMnO4 + 8HCl → 3Cl2 + 2MnO2 + 4H2O + 2KCl.This equation is balanced in such a way that 2 moles of KMnO4 reacts with 8 moles of HCl to produce 3 moles of Cl2, 2 moles of MnO2, 4 moles of H2O and 2 moles of KCl.We are given the number of moles of KMnO4 as 0.64 moles.Now, we can use stoichiometry to find the number of moles of HCl required to react with 0.64 moles of KMnO4.The balanced chemical equation shows that 8 moles of HCl reacts with 2 moles of KMnO4.

So, one mole of KMnO4 would react with 8/2 = 4 moles of HCl.Now, the number of moles of HCl required to react with 0.64 moles of KMnO4 would be;Moles of HCl = Moles of KMnO4 x (Moles of HCl / Moles of KMnO4) Moles of HCl = 0.64 x 4 = 2.56 moles of HCl.

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The molecules at point A are farther apart than the molecules at point B due to increase in temperature.

.

Temperature is a measure of the average kinetic energy of the particles of a substance.

The higher the temperature, the greater the kinetic energy of the molecules.

When water molecules are heated, the molecules acquire greater kinetic energy and move further apart.

Therefore, the molecules at A are farther apart than those at B.

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From the table showing the data involving the neutralization reaction between HCl and NaOH, the concentration of the HCl solution would be 0.864 M

From the available data:

Volume of acid used = 0.0351 - 0.0131 = 0.022 L

Volume of base used = 0.0575 - 0.0385 = 0.019 L

Concentration of base = 1.00 M

Number of moles of acid and base = 1

Using the equation:                      CaVa/CbVb = Na/Nb = 1

Ca = 1x0.019/0.022 = 0.864 M

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The expression to be rearranged K = [CO][Cl₂] [COCI₂]  are x = 0.327 or x = 339.

The expression to be rearranged K = [CO][Cl₂] [COCI₂] is:

(0.156 - x) (0.156 - x) (0.263 + x) = 5.00 × 10⁻²

We will expand and simplify the expression:

(0.156 - x) (0.156 - x) (0.263 + x) = 5.00 × 10⁻²(0.156)² + (0.156)(x) - (x)(0.156) - (x)² (0.263 + x)

= 5.00 × 10⁻²(0.156)² - (0.263)(0.156)(x) - (0.156)(x) + (0.263)(0.156)(x) + x²(0.263 + x) - 5.00 × 10⁻² = 0

After simplifying:

-0.0132302 x² - 0.001002 x + 0.0014256 = 0

This is in the form ax² + bx + c = 0 where a = -0.0132302, b = -0.001002 and c = 0.0014256

Using the quadratic formula, we have:

\(\[x = \frac{-b \pm \sqrt{b^2-4ac}}{2a}\]\)

Substituting values, we get:

\(\[x = \frac{-(-0.001002) \pm \sqrt{(-0.001002)^2-4(-0.0132302)(0.0014256)}}{2(-0.0132302)}\]\)

Solving, we get:x = 0.327 or 3.39 × 10²

Therefore, the solutions are x = 0.327 or x = 339.

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Answer: Explanation:

Water wheels have several important parts that work together (see diagram).

*Flowing water (delivered via a channel called a mill race)

*Large wooden or metal wheels.

*Paddles or buckets (arranged evenly around the wheel)

*Axle.

*Belts or gears.

Answer:

The mass remains constant

Explanation:

Burning a wood is a chemical change which produces many products. According to the law of conservation of mass, matter is neither created nor destroyed in a chemical reaction.

Answer:

See explanation

Explanation:

It is common knowledge that quite a number of people enjoy singing in the shower. There are reasons for this!

In the shower, there are many surfaces that reflect the sound of your voice as you sing. That makes your voice to sound more powerful and have more  volume.

The reverberation of the sound makes the sound of your voice stronger and more intense altogether enriching the music produced as you sing.

Pyramidal is the electronic geometry (the arrangement of all electron pairs) around the central atom of nh3.

In chemistry, a trigonal pyramid is a molecular shape that resembles a tetrahedron and has one atom at the top and three at the corners of the base (not to be confused with the tetrahedral geometry). The molecule belongs to point group C3v when all three of the atoms in the corners are the same. The pnictogen hydrides (XH3), xenon trioxide (XeO3), the chlorate ion, ClO 3, and the sulfite ion, SO2 3 are some molecules and ions with trigonal pyramidal structure. Trigonal pyramidal-shaped molecules are sometimes referred to as sp3 hybridized in organic chemistry. According to the AXE technique for the VSEPR theory, the classification is AX3E1.

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Approximately 214 grams of the radioactive substance will remain after 70 minutes.

To calculate the amount of radioactive substance that will remain after 70 minutes, we can use the formula:
Final amount = Initial amount * (1 - decay rate)^time
Given that the decay rate is 1.9% per minute and the initial amount is 1000 g, we can substitute these values into the formula:
Final amount = 1000 g * (1 - 0.019)^70

Simplifying the equation:
Final amount = 1000 g * (0.981)^70
Evaluating the equation:
Final amount ≈ 1000 g * 0.214
Final amount ≈ 214 g

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The structure of the dimer of Nomex is as follows:


To draw the structure of the dimer, we first need to draw the structure of the two monomers, isophthalic acid and m-aminoaniline:



Next, we need to eliminate a water molecule from the two monomers to form the dimer. This is done by removing a hydrogen atom from the amino group of m-aminoaniline and a hydroxyl group from isophthalic acid:


Finally, we can connect the two monomers together to form the dimer of Nomex:

This is the structure of the dimer of Nomex, which is a condensation copolymer formed between isophthalic acid and m-aminoaniline.

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Answer:

exothermic

Explanation:

exothermic reactions give off heat.....or the temp of the substances increases

Answer:

hola, soy bueno en química en algunas cosas y no tengo correo lo siento

Explanation:

oye hablas español

The littoral zone of a lake is the area closest to the shore. It has very little biological activity but includes a lot of oxygen. The water in the lake's littoral zone is freshwater, free of living organisms such as plants and fish.

Answer: A an apple has the mass of 86.5g

Explanation:

Quantitative measurements are those that deal with a quantity, for example:

Mass of as sample

Length of a piece of wire

Molecules in a mole

Volume of a gas

Temperature of a sample

Answer:

Explanation:

the given equation is not balance

the balance equation can be written as

4P+5O2...........2P2O5