Naphthalene, C10H8(s), burns (reacts with O2(g)) to produce CO2(g) and H2O(g). Suppose a mixture initially contains only C10H8 and O2 in a mole ratio of 1.56:26.6 (C10H8:O2) at 380 Kelvin and a total pressure of 5.20 atm. Calculate the total pressure (atm) once the reaction reaches completion at constant temperature and volume. Enter your answer to 2 decimal places.

Answer:

18.3%

Explanation:

Add the numbers together, and then take the number of grams of the substance, in this case copper, not coppper lol. divide the .45 by 2.45 to get 18.3

According to the structure of the3- methyl benzoic acid in space, it is polar in nature due the presence of carboxyl group and the slightly polar benzene ring. So option B is correct.

Here is the structure of the 3-methylbenzoic acid in space. For the proper structure, refer to the image attachment in this answer.

     H

      |

     C

     / \

   C   O-H

   / \  

 C   C  

 /     \

H       CH3  

In order to predict the polarity of any compound, it is essential to consider the electronegativity of the atoms involved in the formation of the molecule. In the case of 3-methylbenzoic acid, the oxygen atom in the carboxyl group (COOH) is highly electronegative, so it creates a polarity between the oxygen and carbon atoms. Also, the benzene ring has a slightly polar character due to the presence of  double bonded carbon-carbon atoms. Therefore, the 3-methylbenzoic acid molecule is polar in nature due to the presence of the carboxyl group and also due to slightly polar benzene ring.

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here it wasnt letting my upload my answer so i screenshotted

The following compounds have integer i values:KClNa2CO3

The following compounds have integer i values: KCl and Na2CO3.

i stands for van't Hoff factor and is the number of particles formed from one solute molecule in a solution.

An i value of 1 means that no particles are produced upon solvation or that the solute molecule exists independently in the solvent.

Conversely, an i value greater than one indicates that one molecule of solute produces more than one particle in the solvent. This includes molecules that dissociate into ions, form complexes, or exist in a solvent as aggregates.

It is worth noting that the i value is an experimentally derived value and may not necessarily be an integer.

According to the question, the following compounds have integer i values:KClNa2CO3

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Answer:

2 are number of coloum o

The code for making dystrophin starts with DNA (deoxyribonucleic acid), which is a molecule that carries the genetic instructions used in the growth, development, functioning, and reproduction of all living organisms.

Duchenne muscular dystrophy (DMD) is a genetic disorder caused by mutations in the dystrophin gene located on the X chromosome. The dystrophin protein plays an important role in maintaining the structure and function of muscle fibers. In individuals with DMD, the dystrophin protein is too short or absent, which leads to progressive muscle weakness and loss of function.

The process of making dystrophin starts with the genetic code that is stored in the DNA molecule. The DNA is transcribed into messenger RNA (mRNA), which carries the genetic code from the nucleus to the ribosomes in the cytoplasm of the cell. The ribosomes then use the mRNA as a template to synthesize the dystrophin protein through a process called translation.

In individuals with DMD, mutations in the dystrophin gene can cause errors in the genetic code, which can lead to a shortened or non-functional dystrophin protein. Without a fully functional dystrophin protein, muscle fibers are more susceptible to damage and degeneration, which can lead to the symptoms of DMD.

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The correct statements are oxygen cylinders must always remain in an upright position and oxygen supports the combustion process and may cause a fire.

Oxygen is a chemical element with symbol O and atomic number 8. It belongs to the chalcogen family in the periodic table. It is a electronegative atom present towards the right side of the periodic table.

Among the above given options we can see that option d is correct because When fuel burns, it reacts with oxygen from the surrounding air, releasing heat and also  generating combustion products (gases, smoke, embers, etc.). This process is known as oxidation. Therefore oxygen supports combustion process.

Option a is also right because for  any gas that is compressed in a cylinder, it is important to keep the cylinders upright, or else there are chances that if the position of the cylinder is changed then lot of pressure can me exploded out.

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Answer:

A Chemical reaction involves changes in energy in the form of absorbtion and release of heat due to the formation and breakdown of chemical bonds. A chemical reaction is categoried as endothermic reaction in which heat energy is take in or absorbed and exothermic reaction in which energy is released.

A model can be created by following below details:

So, the decrease in temperature shows it is an endothermic reaction in which heat energy is absorbed.

Energy change in the reaction has been stored in the products and the reactants. The change in the reactant to product results in a change in energy.

According to the law of conservation of energy, energy can neither be created nor destroyed in a chemical reaction. The chemical reaction has been resulted in the energy change by the endothermic and exothermic reactions.

The project model for energy change can be:

Reactant + Energy = Products.

The ice cube has been placed in a beaker. It has been consisted of the stored potential energy. WIth the application of heat energy there has been the conversion of ice cubes to the water, and the potential energy of the ice cubes has been converted to the kinetic energy of the moving liquid particles.

Reactant = Product + Energy

The model has consisted of matching the light with a matchstick. The chemical energy of the stored matchstick has been converted to light and heat energy.

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Answer:

D

Explanation:

it seems the most logical

Answer:

B

Explanation:

6.00 ml

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False. Mitochondrial ATP synthase is a protein complex located in the inner mitochondrial membrane that is responsible for synthesizing ATP from ADP and inorganic phosphate during oxidative phosphorylation.

It is an integral part of the electron transport chain, which is the process by which cells generate most of their ATP. The ATP synthase complex requires a proton gradient across the inner mitochondrial membrane to function properly. When mitochondria are broken or disrupted, the proton gradient is lost, and ATP synthesis ceases.

Therefore, ATP synthase cannot synthesize ATP once it is extracted from broken mitochondria. In fact, ATP synthase is highly sensitive to disruption and is often used as a marker for mitochondrial damage or dysfunction. This is why it is crucial to handle mitochondria carefully during experiments to ensure that they remain intact and functional. Overall, mitochondrial ATP synthase is a critical component of cellular energy metabolism and plays an essential role in maintaining proper cellular function.

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Answer:

Doubling the volume of the reaction vessel and adding more oxygen to the reaction vessel will change the concentrations and will affect equilibrium concentrations.

Explanation:

Yes, it is fake! The actual density of the ring is lower than that of real gold

To know if the gold ring is fake or not, we shall determine the density of the gold ring. This is shown below:

Density = mass / volume

Density of gold ring = 109 / 6

Density of gold ring = 18.17 g/mL

Comparing the density of the gold ring (i.e 18.17 g/mL) to the density of real gold (i.e 19.3 g/cm³), we can conclude that the gold ring is fake.!

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Answer:

A. 7

(assuming the water is neutral)

energy which a body possess by virtue of being in motion

ex: a river flowing at a certain speed comprises kinetic energy as water has a certain velocity and mass

The molecular formula is the expression of the number of atoms of the elements and the chemical symbols of the atoms. The correct molecular formula of the compound is \(\rm C_{6}H_{6}O_{6}.\)

A molecular formula is a depiction of the chemical symbols of the elements with the number of atoms in the subscripts present in the compound.

Let the empirical formula for the compound be, \(\rm (CHO)_{n}\) and the molar mass of the compound is 176.124 g/mole.

The percentage of the carbon in the compound is calculated as,

\(\begin{aligned} &=\dfrac{\text{mass of the carbon}}{\text{mass of the sample}} \times 100\\\\&= \dfrac{283.4}{692.5}\times 100\\\\&= 40.92\end{aligned}\)

The percentage of the hydrogen in the compound is calculated as,

\(\begin{aligned} &=\dfrac{\text{mass of the hydrogen}}{\text{mass of the sample}} \times 100\\\\&= \dfrac{31.7}{692.5}\times 100\\\\&= 4.57\end{aligned}\)

The percentage of the oxygen in the compound is calculated as,

\(\begin{aligned} &=\dfrac{\text{mass of the oxygen}}{\text{mass of the sample}} \times 100\\\\&= \dfrac{377.4}{692.5}\times 100\\\\&= 54.49\end{aligned}\)

The ratio of the atomic number of the carbon in the compound is = 3.410

The ratio of the atomic number of the hydrogen in the compound is = 4.577

The ratio of the atomic number of the oxygen in the compound is = 3.406

Now dividing all the three ratios with the smallest ratio we get C: H: O = 1:1:1

Hence, the empirical formula of the compound is given as, \(\rm [CHO]_{n}\) and the molecular formula as,

\(\begin{aligned}\rm 12n + 1n + 16n & = 176.24\\\\29 \rm n &= 176.24\\\\\rm n &= 6 \end{aligned}\)

Hence, the molecular formula of the compound is option C. \(\rm C_{6}H_{6}O_{6}.\)

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D. Running water at 135 F (57 C) or lower, or a container of water at 135 F (57 C) or lower.

Answer: In equation of reaction nitrogen N2 is formed instead of O2

Formula of nitroglycerin is C3H5(NO3)3

Number for N2 is 12. Thus one mole nitroglycerin produces 3 moles N2

Explanation:

Mass of Barium = 720.73 g ; Mass of Phosphorus = 108.37 g ; Mass of Oxygen =  223.91 g

To determine the masses of barium, phosphorus, and oxygen in a sample of barium phosphate (Ba3(PO4)2), you need to calculate the formula weight of the compound and then multiply it by number of moles of  compound in the sample.

First, calculate the formula weight of the compound:

Ba3(PO4)2 formula weight = (3 x 137.327 g/mol) + (2 x (30.97 g/mol + 4 x (16.00 g/mol)) = 601.9 g/mol

n = 1053.8 g / 601.9 g/mol = 1.75 mol

Mass of Barium = 3 x 137.327 g/mol x 1.75 mol = 720.73 g

Mass of Phosphorus = 2 x 30.97 g/mol x 1.75 mol = 108.37 g

Mass of Oxygen = 8 x 16.00 g/mol x 1.75 mol = 223.91 g

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Answer:

combustion is a high-temperature exothermic redox chemical reaction between a fuel and an oxidant, usually atmospheric oxygen, that produces oxidized, often gaseous products, in a mixture termed as smoke.

The frequency and the wavelength are;

1)  4 * 10^-5 m

2) 2 * 10^-7 m

3) 4.4 * 10^13 Hz

4)  4.6 * 10^14 Hz

5)  4.5 * 10^-7 m

From the fact that;

c = λf

c = Speed of light

λ = wavelength

f = frequency

1)  λ = 3 * 10^8/7.5 * 10^12

λ = 4 * 10^-5 m

2)  λ = 3 * 10^8/1.5 * 10^15

λ = 2 * 10^-7 m

3) f = c/ λ

f = 3 * 10^8/6.8 * 10^-5

f = 4.4 * 10^13 Hz

4) f = 3 * 10^8/6.5 * 10^-7

f = 4.6 * 10^14 Hz

5)  λ = c/f

= 3 * 10^8/6.6 * 10^14

= 4.5 * 10^-7 m

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Answer:

2 electrons

Explanation:

The first principal energy level contains only an s sublevel; therefore, it can hold a maximum of two electrons.

Now, we can use the equilibrium expression for the reaction of codeine as a base with water: C₁H₂NO + H₂O ⇌ C₁H₂NOH⁺ + OH⁻.

Kb = ([C₁H₂NOH⁺] * [OH⁻]) / [C₁H₂NO].

To calculate the base dissociation constant (Kb) for codeine, we can use the relationship between the concentration of hydroxide ions (OH-) and the concentration of the base (codeine) at a given pH.

In a basic solution, the concentration of hydroxide ions can be determined using the formula: [OH-] = 10^(-pOH). Since the pH of the solution is given as 9.59, we can calculate the pOH as 14 - 9.59 = 4.41.

Next, we need to determine the concentration of codeine. The given solution has a concentration of 1.7 x 10³ M, which means [codeine] = 1.7 x 10³ M.

Now, we can use the equilibrium expression for the reaction of codeine as a base with water: C₁H₂NO + H₂O ⇌ C₁H₂NOH⁺ + OH⁻.

Kb = ([C₁H₂NOH⁺] * [OH⁻]) / [C₁H₂NO].

Since we have the concentrations of codeine ([C₁H₂NO]) and hydroxide ions ([OH⁻]), we can substitute these values into the equation and calculate Kb.

Please note that without additional information about the dissociation of codeine as a base, the specific value of Kb cannot be determined with the information provided.

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The molar mass of a substance is the mass of one mole of that substance, and it is usually measured in units of grams per mole (g/mol). In the case of helium gas (He2), the molar mass is calculated by adding up the masses of two atoms of helium.

Helium is a chemical element with the atomic number 2 and the symbol He. Its atomic weight is 4.003, which means that one atom of helium has a mass of 4.003 grams. To find the molar mass of helium gas, we need to multiply the atomic weight of helium by Avogadro's number, which is 6.022 x 10^23 atoms per mole.

Therefore, the molar mass of helium gas (He2) is:

(2 x 4.003 g/mol) = 8.006 g/mol

It is important to note that, helium is a diatomic molecule, meaning it exist in pairs (He2) and it is a gas at room temperature and standard pressure, so the molar mass of helium gas is 8.006 g/mol.

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To address the crevice corrosion issue in the high-pressure connectors and piping of the SWRO plant, several remedies can be considered, A SWRO (Sea Water Reverse Osmosis) plant is a water desalination facility that uses reverse osmosis technology to treat seawater or brackish water and produce freshwater

Material Selection: Evaluate the material compatibility with the operating conditions, especially the chloride ion concentration and temperature. Consider using corrosion-resistant alloys such as duplex stainless steel (e.g., 2205) or super duplex stainless steel (e.g., 2507) that have better resistance to chloride-induced corrosion compared to 316L or 317L stainless steel.

Surface Treatment: Apply appropriate surface treatments to enhance corrosion resistance. Passivation or pickling can remove surface contaminants and create a protective oxide layer on the metal surface, reducing the susceptibility to corrosion.

Design Modifications: Evaluate the design of the connectors and piping to minimize crevices and stagnant areas where corrosion can occur. Smooth transitions, avoiding sharp angles or crevices, can help promote better fluid flow and prevent the accumulation of corrosive substances.

Cathodic Protection: Implement cathodic protection methods, such as impressed current or sacrificial anodes, to protect the connectors and piping from corrosion. This technique involves introducing a more easily corroded metal (anode) to the system, which sacrifices itself to protect the connected metal (cathode) from corrosion.

Monitoring and Maintenance: Regularly monitor the corrosion levels and condition of the connectors and piping. Implement a maintenance program that includes periodic inspections, cleaning, and repairs, if necessary, to prevent corrosion from progressing.

It is important to consult with corrosion experts and engineers who specialize in SWRO plant operations to assess the specific conditions, perform material testing, and provide tailored solutions to mitigate the crevice corrosion problem effectively.

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The total work produced by the steam engine needs to be calculated and given that the steam engine accepts heat during isothermal expansion at 250 °C and discards heat through isothermal compression at 25 °C.

The magnitude of the entropy change during the isothermal compression step is 750 J/K. The efficiency of the steam engine is 65% of the maximum attainable theoretical efficiency. Given that the efficiency of the steam engine is 65% of the maximum attainable theoretical efficiency.

Hence, the actual efficiency will be:

η_actual = η_max × 0.65Where,

η_max is the maximum attainable theoretical efficiency.

η_actual = 0.65 × η_maxNow,

the efficiency of a Carnot engine (η_Carnot) can be given as:η_Carnot = 1 - (T_cold / T_hot)Here, T_hot and T_cold are the temperatures of the hot and cold reservoirs respectively.

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Work is a measure of the energy transfer that occurs when an object is moved against a force. Work is defined as the product of the force applied to an object and the displacement of the object in the direction of the force. Hence the total work produced by the engine is 47,175 J.

1. Converting the temperatures from degrees Celsius to Kelvin.

T1 = 250 °C + 273.15 K = 523.15 K

T2 = 25 °C + 273.15 K = 298.15 K

2. The maximum attainable theoretical efficiency.

ηmax = 1 - T2 / T1 = 1 - 298.15 / 523.15 = 42.9%

3. The efficiency of the steam engine.

η = 0.65 * ηmax = 0.65 * 42.9% = 27.7%

4. The entropy change during the isothermal expansion step.

dS = 750 J/K

5. The total work produced by the engine.

W = η * (T1 - T2) * dS = 0.277 * (523.15 - 298.15) * 750 J/K = 47,175 J

Therefore, the total work produced by the engine is 47,175 J.

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Answer:

1.92

Explanation:

Choose a fact or concept from the lesson that you can apply in your life. Describe the fact or concept, and explain how you will apply it.

Answer: For Primavera integrated science

A fact is this, we all have a lot of issues in life, but we need to stay as positive as possible about it.

Explanation:

In life a lot of bad things will happen to us. These things can be very negative at time's and make life harder. We should attempt to remain as positive about the situation as possible. This will enable us to be in a better headspace about whatever has happened to us and give us more mental room to breath.

Two heads are better than one is the phrase which means that advice from a second person can be helpful. The concept of the issues and positivity can be taken.

Negativity is the pessimism that criticizes something around a person. Positivity is the optimistic attitude or the positive approach towards a person or something.

An individual faces a lot of challenges and issues in his life that can be dealt with a positive approach. A lot of bad things occurring in a person's life can negatively affect the person making their life harder.

Being positive in a bad situation will enable a person to remain calm to solve the problems and will give him more mental peace.

Therefore, "two heads are better than one."

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