Find the pH of a 0.183 M aqueous solution of hypobromous acid (HOBr), for which Ka = 2.06 x 10-9. Please show all work.

Answer:

Each sample has the same number of molecules.

Explanation:

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Taking into account the definition of Avogadro's number, each sample has the same number of molecules.

Avogadro's Number or Avogadro's Constant is called the number of particles that make up a substance (usually atoms or molecules) and that can be found in the amount of one mole of said substance. Its value is 6.023×10²³ particles per mole.

Avogadro's number applies to any substance.

Avogadro's number applies to any substance. This means that the number of molecules in 1 mol of oxygen is equal to the number of molecules in 1 mol of nitrogen.

Finally, the correct answer is the third option: each sample has the same number of molecules.

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The only incorrect statement in the diagram is (d) Cr202-7 can be used in aqueous H2SO4.

Option (d) is incorrect because the half-cell reaction involving Cr2O7^2- and H+ (aq) produces H2CrO4, which can decompose in acidic solutions, leading to inaccurate results. Therefore, Cr2O7^2- should not be used in aqueous H2SO4 for the quantitative estimation of Fe(NO3)2-.

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The Only incorrect statement is option C

Electrochemistry is a branch of chemistry that deals with the study of the relationship between electrical energy and chemical reactions.

It involves the study of the behavior of electrons and ions in chemical reactions that occur in a solution or at the interface between two different phases, such as a solid electrode and a liquid electrolyte.

We can see that it is better to use HCl instead of the use of the H2SO4 acid as we have in the options.

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the relative change in the reaction rate due to a change in temperature from 300°C to 400°C, is (r(A₂) - r(A₁)) / r(A₁).

The equation for the reaction rate (rA) is given as:

r(A) = 2 *\(e^{-E / (R * t)\) * C₂A

Where:

E is the activation energy (44 kJ/mol)

R is the ideal gas constant (8.314 J/(mol·K))

T is the temperature in Kelvin (K)

To calculate the relative change in the reaction rate, we need to find the ratio of the reaction rates at the two temperatures.

denote the reaction rate at 300°C as r\(A_{1}\)and the reaction rate at 400°C as r\(A_{2}\)

convert the temperatures to Kelvin:

\(T_{1}\)= 300°C + 273.15 = 573.15 K

\(T_{2}\) = 400°C + 273.15 = 673.15 K

reaction rates at each temperature:

r(\(A_{1}\)) = 2 *\(e^{-E / (R * t_{1} )\) * C₂A

r(A₂) = 2 *\(e^{-E / (R * t_{2} )\) * C₂A

Relative change = (r(A₂) - r(A₁)) / r(A₁)

By substituting the calculated reaction rates into the formula, we can determine the relative change in the reaction rate due to the temperature change from 300°C to 400°C.

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Answer:

480.06 g/mol, Thorium nitrate.

Explanation:

The false statement regarding the Lewis structure for the nitric acid molecule, HNO3, is option B) The N-O bond order is 4/3.

The N-O bond order is actually 4/3 in one of the resonance structures of HNO3, but not in the overall molecule. The molecule requires more than one resonance structure, as stated in option A.

In water, HNO3 will dissociate to form H+ and NO3-, not H3O+, as stated in option C.

The formal charge on nitrogen can be calculated as 5-(0+6/2+2x2/2)=0, not +1 as stated in option D.

The oxidation state of nitrogen can be calculated as the sum of valence electrons of nitrogen and the electrons it has gained or lost, which is +5 in HNO3, as stated in option E.

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Answer:

The answer will be "B"

Explanation:

It is B, because as we can see in the problem, it shows that there are three hydrogen gas, which is H₂. So, it shows that the ratio of Hydrogen gas to Ammonia is 3:2. In the answer, it says for every 3 mol of H₂ 2 moles of ammonia is produce. Therefore, B is correct.

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The overall reaction is thermodynamically favorable as the products have higher stability than the reactants.

The three steps of an electrophilic aromatic substitution reaction are: (a) formation of an electrophile, (b) reaction with an aromatic ring to form an intermediate, and (c) loss of a leaving group to reform the aromatic system. The first step involves attacking an electron-rich aromatic ring with an electrophile, which is an electron-deficient species. This attack forms a cationic intermediate, which is a species with a positive charge. The second step involves the reaction of the intermediate with a nucleophile, resulting in the formation of a new carbon-carbon bond and the release of a leaving group. The final step involves the loss of the leaving group, resulting in the formation of a new aromatic system. The overall reaction can be represented as follows: Ar-H + E+ --> Ar-E+ --> Ar-X + E- --> Ar-Y, where Ar-H is the starting aromatic compound, E+ is the electrophile, Ar-E+ is the intermediate, Ar-X is the product with the leaving group, and Ar-Y is the final product after the leaving group is lost. The net reaction can be written as Ar-H + E+ --> Ar-Y. The overall reaction is thermodynamically favorable as the products have higher stability than the reactants.

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The compound's molar mass is expressed in gram per mole, or g/mol.

One mole of a specific chemical or material has a mass of 1 molar. The compound's molar mass in the unit called gram per mole, or g/mol.

Avoid mixing up the terms molecular weight and molar mass of the material. The two are not equivalent. The atomic weight of each atom in a particular molecule adds up to make up the compound's mass, while the molar mass is the result of multiplying the molecule's weight by the number of moles in the compound.

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To calculate the volume of the reactor and space-time for a reversible gas phase reaction, A+2B, conducted at 540 °F and 3 atm with a feed rate of 75 lb mol/h and 40% A, and an equilibrium conversion of 75%, we need to consider the specific reaction rate and the concentration equilibrium constant.

The space-time for a reactor is defined as the volume of the reactor divided by the feed rate. To calculate the volume of the reactor, we first determine the molar flow rate of component A, which is 75 lb mol/h * 0.40 = 30 lb mol/h. Then, we divide the molar flow rate of A by the specific reaction rate to obtain the volume: Volume = 30 lb mol/h / (1.6 s * 3600 s/h) = 5.2083 ft³.

To calculate the space-time, we divide the volume by the feed rate: Space-time = 5.2083 ft³ / 75 lb mol/h = 0.0694 ft³/lb mol/h.

Therefore, the volume of the reactor is 5.2083 ft³ and the space-time is 0.0694 ft³/lb mol/h.

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Answer:

When light hits an object that is transparent or translucent and light can penetrate the material to travel all the way through.

Explanation:

when light transmission happens it can be scattered or refracted. Scattering happens when light hits an atom and is sent in all directions.

The original pressure of gas is 4 atm for given volume of 30 liters . This is taken out by boyle law.

Boyle's law is an experimental gas law that specifies the relationship between pressure and volume of a confined gas. It is also known as the Boyle-Mariotte law or Mariotte's law (particularly in France). Boyle's law states that the absolute pressure exerted by a given mass of an ideal gas is inversely proportional to the volume it occupies within a closed system if the temperature and amount of gas remain constant.According to Boyle's Law, while the temperature of a given mass of confined gas remains constant, the product of its pressure and volume remains constant as well. When comparing the same substance under two sets of conditions

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The charge of phosphate : 3-

Oxidation is an increase in oxidation number, while reduction is a reduction in oxidation number.

The formula for determining Oxidation Numbers in general:

1. Single element atomic oxidation number = 0.

Group IA (Li, Na, K, Rb, Cs, and Fr): +1

Group IIA (Be, Mg, Ca, Sr and Ba): +2

Group IIIA(Al, B) : +3

H in compound = +1, except metal hydride compounds (Hydrogen which binds to groups IA or IIA) oxidation number H = -1, for example, LiH, MgH₂, etc.

2. Oxidation number O in compound = -2, except OF2 = + 2 and in peroxide (Na₂O₂, BaO₂) = -1 and superoxide, for example KO₂ = -1/2.

3 The oxidation number in an uncharged compound = 0,

Total oxidation number in ion = ion charge, Example NO₃⁻ = -1

Compound AlPO₄ :

The oxidation number in an uncharged compound = 0

Since the charge of Al as group 3A (or group 13) is +3, while the AlPO₄ compound is a polyatomic compound (consisting of polyatomic ions PO₄ and Al), the PO₄ charge:

charge Al + charge PO₄ = 0

+ 3 + charge PO₄ = 0

charge PO₄ = -3

Answer: To determine the pressure change of a gas when it is heated at constant volume, we can use the ideal gas law:

PV = nRT

where P is the pressure, V is the volume, n is the number of moles of gas, R is the ideal gas constant, and T is the temperature in Kelvin.

Since the volume of the gas is constant, we can simplify the equation to:

P/T = nR/V

The quantity nR/V is a constant, which means that P/T is also a constant at constant volume. Therefore, we can use the following equation to calculate the pressure at a new temperature:

P2/T2 = P1/T1

where P1 and T1 are the initial pressure and temperature, and P2 and T2 are the final pressure and temperature.

We can convert the temperatures to Kelvin by adding 273.15:

T1 = 30.0 °C + 273.15 = 303.15 K

T2 = 40.0 °C + 273.15 = 313.15 K

We can plug in the given values and solve for P2:

P2/313.15 K = 2.50 atm/303.15 K

P2 = (2.50 atm)(313.15 K)/(303.15 K)

P2 = 2.58 atm

Therefore, the pressure of the gas increases from 2.50 atm to 2.58 atm when it is heated from 30.0 °C to 40.0 °C at constant volume.

Explanation:

The given statement: "Electrical attractions between atoms lower the total energy of the bonded atoms and make them more stable." is True.

Electrical attractions between atoms, specifically the sharing or transfer of electrons, can lower the total energy of the bonded atoms and make them more stable. This is because the sharing or transfer of electrons allows atoms to achieve a more favorable electron configuration, typically by filling or emptying their outermost electron shells. By doing so, the atoms reach a more stable state with lower potential energy, resulting in increased stability of the bonded system.

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Answer:

people as: it Is less expensive. easy to carry

The camel consumed approximately 2.24 kg of protein from the Bermudagrass hay.

To calculate the amount of protein the camel consumed, we need to consider the dry matter basis of the hay. Here's how you can calculate it:

Calculate the dry matter weight of the hay:

Dry Matter Weight = Total Weight of Hay × Dry Matter Percentage

Dry Matter Weight = 18.3 kg × (83.4/100)

Dry Matter Weight = 18.3 kg × 0.834

Dry Matter Weight = 15.2442 kg

Calculate the protein content in the dry matter;

Protein Content = Dry Matter Weight × Protein Percentage

Protein Content = 15.2442 kg × (14.7/100)

Protein Content = 15.2442 kg × 0.147

Protein Content = 2.2414194 kg

Therefore, the camel consumed approximately 2.24 kg of protein from the Bermudagrass hay.

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An atom X that has 12 protons and 12 electrons, loses 2 electrons to form an ions,  the charge of ion will be X⁺² the number of protons 12 and electrons in the ions is 10.

An atom X has 12 protons and 12 electrons that means X is a neutral atom and the atomic no. is 12 because total no. of protons is equal to atomic number. When it looses the 2 electrons then atom becomes positively charged ion . the charge on the ion is +2.

now, the no. of protons will be = 12

number of electrons will be = 12 - 2 = 10

Thus, An atom X that has 12 protons and 12 electrons, loses 2 electrons to form an ions,  the charge of ion will be X⁺² the number of protons 12 and electrons in the ions is 10.

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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:

One molecule of glucose has 6 atoms, as you can see in carbon's index. ( C6 ). In 20 molecules there will be 6⋅20 carbon atoms.

Explanation:

Answer:

NRC: Seabrook nuke plant ran safely in 2020, concrete degradation being monitored. SEABROOK — According to federal experts, annual inspections throughout 2020 show NextEra Energy Seabrook's nuclear power plant again ran safely over the past year.

Explanation:

Answer:

the molecular formula = SF6

Explanation:

firstly we have to list the firmulas we r goin to use to work out the molecular formula.

now we use the 1st formula to find n which will be substituted into the molecular formula

We are going to take the mass we have been given in the question as the mass of the compound and substitute it to the formula.

Then we will work out the mass of empirical formula for the compound: Sulphur; 32 flourine;19 SF6_ 32+6(19)=146

now we finish off n

Lastly we work out the molecula formula

the final answer will therefore be SF6

Answer:

to protect astronauts from dieing from no air or presurre

Explanation:

Answer:

Matter is made up of particles that are in constant motion and have energy

Explanation:

Answer:

0 lone pairs

Explanation:

Answer:

359 grams FeO

Explanation:

To find how many grams FeO are produced, you need to use the moles of Fe, convert it to moles of FeO (using the mole-to-mole ratio from the equation), then convert the moles of FeO to grams (using the molar mass from the periodic table).

2 Fe + O₂ --> 2 FeO

Molar Mass (FeO) = 55.845 g/mol + 16.00 g/mol

Molar Mass (FeO) = 71.845 g/mol

5.00 moles Fe           2 moles FeO            71.845 grams
----------------------   x  ------------------------  x  ----------------------  = 359 grams FeO
                                   2 moles Fe               1 mole FeO

Answer:

D

Explanation:

1. Air and Fuel Intake: A mixture of air and fuel is drawn into the engine's cylinder through the intake valve.

2. Compression: The piston moves up to compress the air and fuel mixture in the cylinder, which raises its temperature and pressure.

3. Ignition: The spark plug ignites the compressed air and fuel mixture, causing a controlled explosion that pushes the piston back down in the cylinder.

4. Expansion: The downward movement of the piston creates energy that drives the engine's crankshaft, which converts the reciprocating motion of the piston into rotary motion.

5. Exhaust: The exhaust valve opens, and the piston moves up to expel the exhaust gases from the engine's cylinder, which prepares the engine for the next cycle.

The half-life of the sample is 4 hours.

Given:

N₀ = 120,000. After 8 hours, the number of undecayed nuclei is N = 7,500.

The half-life of a radioactive sample is the amount of time it takes for half of the original radioactive nuclei to decay.

The formula for radioactive decay:

N = N₀ × (1/2)^(t/t½)

where N is the number of undecayed nuclei at time t, N₀ is the initial number of undecayed nuclei, t is the time elapsed, and t½ is the half-life of the sample.

7,500 = 120,000 × (1/2)^(8/t½)

Dividing both sides by 120,000:

(1/16) = (1/2)^(8/t½)

Taking the logarithm of both sides (base 2):

-4 = (8/t½)

Multiplying both sides by -1/8:

1/2 = (t½/8)

t½ = 4 hours

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