please answer holy its been an hour

An Arrhenius base is a substance that increases the concentration of OH- ions when dissolved in water.

1. The mass of chlorine formed can be obtain as follow:

2AlCl₃ -> 2Al + 3Cl₂

From the balanced equation above,

267 g of AlCl₃ decomposed to produce 213 g of Cl₂

Therefore,

10 g of AlCl₃ will decompose to produce = (10 × 213) / 267 = 7.98 g of Cl₂

Thus, the mass of chlorine formed is 7.98 g

2. The mass of aluminium formed can be obtain as follow:

2AlCl₃ -> 2Al + 3Cl₂

From the balanced equation above,

267 g of AlCl₃ decomposed to produce 54 g of Al

Therefore,

10 g of AlCl₃ will decompose to produce = (10 × 54) / 267 = 2.02 g of Al

Thus, the mass of aluminum formed is 2.02 g

The percentage yield of aluminum formed can be obtain as follow:

Percentage yield = (Actual /Theoretical) × 100

Percentage yield of aluminum = (1.2 / 2.02) × 100

Percentage yield of aluminum = 59.4%

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Answer:

A

Explanation:

To find the pH of vinegar, we can use the given formula pH= -log[H+], where [H+] is the hydronium ion concentration in the vinegar.Substituting the given value of hydronium ion concentration [H+] = 1.6 × 10^-3 M in the above formula, we get:pH = -log(1.6 × 10^-3)Using a calculator, we can evaluate the logarithm to be 2.8.Therefore, the pH of the vinegar is 2.8.Hence, the correct answer is option A) 2.8.

dont mind me here for the points

The moles of Cl₂(g) will be present at equilibrium is 3.94 × 10⁻⁴ mol

To determine the number of moles of Cl₂(g) at equilibrium, we need to use the given equilibrium constant (Kₑ) and the initial concentrations of CO(g) and COCl₂(g).

Given:

[CO(g)] = 0.3500 mol

[COCl₂(g)] = 0.05500 mol

Kₑ = 1.2 × 10²

The balanced equation for the reaction is:

CO(g) + Cl₂(g) ⇌ COCl₂(g)

Let's denote the number of moles of Cl₂(g) at equilibrium as x. At the start, we have [Cl₂(g)] = 0 mol, but it will change by x at equilibrium.

Using the equilibrium expression, we can write:

Kₑ = [COCl₂(g)] / ([CO(g)] * [Cl₂(g)])

Plugging in the values:

1.2 × 10² = [COCl₂(g)] / (0.3500 * [Cl₂(g)])

To solve for [Cl₂(g)], we need to isolate it on one side of the equation:

[Cl₂(g)] = [COCl₂(g)] / (0.3500 * Kₑ)

Now, let's substitute the given values:

[Cl₂(g)] = 0.05500 / (0.3500 * 1.2 × 10²)

[Cl₂(g)] ≈ 3.94 × 10⁻⁴ mol

Therefore, approximately 3.94 × 10⁻⁴ moles of Cl₂(g) will be present at equilibrium.

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The question was Incomplete, Find the full content below:

Starting with 0.3500 mol CO(g) and 0.05500 mol COCl₂(g) in a 3.050-L flask at 668 K, how many moles of Cl₂(g) will be present at equilibrium

CO(g) + Cl₂(g) ⇄ COCl₂(g)  Ke 1.2 x 10^{2} at 668 K

Answer:

your answer should be B.273 K

Explanation:

Trichlorine octanitride is the name of the chemical formula Cl₃N₈.

So, the correct answer is option (B)  trichlorine octanitride.

A chemical formula is an expression that shows the elements in a compound and the relative proportions of those elements.

If only one atom of a specific type is present, no subscript is used. For atoms that have two or more of a specific type of atom present, a subscript is written after the symbol for that atom.

A chemical formula is an expression that represents the element in that compound along with its relative proportion in the compound.

Example of Chemical formula for water is H₂O.

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The volume of argon gas will be, 79.68L .

Mass of argon (Ar) gas = 2.71 g

Molar mass of argon = 39.95 g/mole

Volume of argon gas = 4.21 L

Moles of neon (Ne) gas = 1.29 mole

First we have to calculate the moles of argon gas.

\(Moles of argon = \frac{mass\ of \ar}{molar \mass\ of \ ar}\\ \\Moles of argon = \frac{2.71}{39.95} \\\\Moles of argon = 0.0678 moles\)

Now we have to calculate the volume of neon gas.

According to the Avogadro's law, the volume of gas is directly proportional to the number of moles of gas at same pressure and temperature. That means,

\(\frac{v_1}{v_2} =\frac{n_1}{n_2}\)

where,

\(v_1\) = volume of argon gas

\(v_2\) = volume of argon gas

\(n_1\) = number of moles of argon gas

\(n_2\) = number of moles of argon gas

Now we put all the given values in this formula, we get

\(\frac{4.21}{v_2} = \frac{0.068}{1.29} \\\\v_2 = 79.86 L\)

Therefore, the volume of argon gas will be, 79.68L .

The molar mass of a chemical compound is defined as the mass of a sample of the compound divided by the amount of the substance, which is the number of moles of the sample measured in moles. Molar mass is the volume of a substance, not a molecular property. Molar mass is the average of several occurrences of a compound, whose mass often varies  due to the presence of isotopes. In most cases, molar mass is calculated from  standard atomic masses and is thus a function of the Earth's average and  the relative abundance of the Earth's atomic isotopes. Molar mass is suitable for converting between the mass of a substance and the amount of  substance in bulk.

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The partial charges on each fluorine atom are negative. Option B) The central O atom is the correct answer. Option B

The partial charges in a molecule are determined by the electronegativity values of the atoms involved. Electronegativity is the ability of an atom to attract electrons towards itself in a chemical bond. In the case of \(F_2O\), fluorine (F) is more electronegative than oxygen.

Fluorine is the most electronegative element on the periodic table, meaning it has a high ability to attract electrons. Oxygen is also relatively electronegative but less so than fluorine. When fluorine atoms bond with oxygen, the shared electrons will be pulled more towards the fluorine atoms, creating a polar covalent bond.

In \(F_2O\), each fluorine atom will pull the shared electrons towards itself, resulting in a higher electron density around the fluorine atoms. This creates a region of partial negative charge around the fluorine atoms.

Conversely, the oxygen atom will have a region of lower electron density and, therefore, a partial positive charge. This is because the shared electrons spend more time around the fluorine atoms due to their higher electronegativity.

Option B

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Quick boiling of water can be related to the hot weather because in high temperature water changes from liquid state to gaseous state.

Water boils quickly when the weather is hot and warm because hot weather has high temperature which leads to the quick evaporation of the water. In hot weather, the liquid water changes into vapor state very quickly as compared to cold temperature.

So we can conclude that Quick boiling of water can be related to the hot weather because in high temperature water changes from liquid state to gaseous state.

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Answer:

See explanation

Explanation:

According to the valence shell electron pair repulsion theory, the shape of a molecule depends on the number of electron pairs on the valence shell of the central atom in the molecule.

So, in order to identify the electron domain geometry of a molecule (number of regions of electron density)

1) draw the full Lewis structure of the molecule/ion

2) indicate the electron pairs surrounding the central atom

3) count the number of electron pairs surrounding the central atom

4) decide on the electron pair geometry using valence shell electron pair repulsion theory.

In this exercise we have to use our knowledge of electrons to describe our molecular formula, so we have to:

The valence shell is the outermost shell that an atom can present, that is, it is the shell furthest from the nucleus of an atom.

Electrons are negatively charged particles that revolve around the atomic nucleus and have a mass 1836 times less than that of protons and neutrons. Electrons are particles that are part of the constitution of the atom.

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There are approximately 6.022 × 10^23 atoms in 12 grams of Carbon-12 (12C).

The number of atoms in a given amount of a substance can be calculated using Avogadro's number, which represents the number of atoms or molecules in one mole of a substance. Avogadro's number is approximately 6.022 × 10^23.

Carbon-12 is a specific isotope of carbon, with an atomic mass of 12 atomic mass units (amu). One mole of Carbon-12 has a mass of 12 grams. Since one mole of any substance contains Avogadro's number of particles, in the case of Carbon-12, it contains 6.022 × 10^23 atoms.

Therefore, if we have 12 grams of Carbon-12, which is equal to one mole, we can conclude that there are approximately 6.022 × 10^23 atoms in this amount of Carbon-12.

In summary, 12 grams of Carbon-12 contains approximately 6.022 × 10^23 atoms. Avogadro's number allows us to relate the mass of a substance to the number of atoms or molecules it contains, providing a fundamental concept in chemistry and enabling us to quantify and understand the microscopic world of atoms and molecules.

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46. Covalent bonds are formed by sharing electrons between atoms.

Covalent bonds are chemical bonds formed when two atoms share electrons. They occur between nonmetal atoms and involve the sharing of electron pairs, resulting in the formation of a stable molecule. Covalent bonds are typically found in molecular compounds.

47. Ionic bonds are formed by gaining or losing electrons between metals and nonmetals.

48. A subscript is used in a formula to indicate the number of atoms of an element in a compound.

49. Chemical reactivity or stability depends on the number of outer energy levels (valence shells) in atoms.

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Answer: The average kinetic energy of the particles in a gas is proportional to the temperature of the gas. Because the mass of these particles is constant, the particles must move faster as the gas becomes warmer. The volume of the gas therefore becomes larger as the temperature of the gas increases.

Answer:

160000

Explanation:

F=ma

m=40000

a=4

if a 40,000 kilogram plane is accelerating at a rate of 4 meters/second², then the force generated by the engine would be 160000 Newtons.

Newton's Second Law states that The resultant force acting on an object is proportional to the rate of change of momentum.

As given in the problem we have to find out the force generated by the engine of the plane if a 40,000-kilogram plane is accelerating at a rate of 4 meters/second²,

The mass of the plane = 40000 kilograms

The acceleration of the plane = 4 meters/second²

The force generated by the engine of the plane = 40000×4

                                                                              = 160000 Newtons

Thus, the engine would generate a force of  160000 Newtons.

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Answer:

0.70.

Explanation:

To calclate the mole faaction of a certiain substance, we have to calculate the total number of moles. In this case, we have 0.314 moles of CO2 and 0.724 moles of N2, so the total number of molesis:

And finally, the formula t find the mole fraction of a substance is:

where X is N2:

The mole fraction of N2 in the glass container is 0.70.

The decomposition of aspirin (acetylsalicylic acid,\(C_{9} H_{8} O_{4}\)) can occur through the hydrolysis reaction, resulting in the formation of acetic acid (\(CH_{3} COOH\)) and salicylic acid (\(C_{7} H_{6}O_{3}\)).

The decomposition of aspirin (acetylsalicylic acid, \(C_{9} H_{8} O_{4}\)) can occur through the hydrolysis reaction, resulting in the formation of acetic acid (\(CH_{3} COOH\)) and salicylic acid (\(C_{7} H_{6}O_{3}\)). To determine the moles of each product formed, we need to consider the balanced chemical equation for the reaction:

\(C_{9} H_{8} O_{4} = > C_{7} H_{6}O_{3} +CH_{3} COOH\)

From the equation, we can see that for every 1 mole of aspirin, 1 mole of salicylic acid and 1 mole of acetic acid are produced.

Therefore, the moles of salicylic acid and acetic acid formed will be equal to the number of moles of aspirin that decomposes. If we know the amount of aspirin in moles, we can directly calculate the moles of each product based on stoichiometry.

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Answer:

1.52 g/mL

Explanation:

The formula for finding the density of an object is d = m/v, or density = mass divided by volume.

Therefore, we can input the two values and solve for d.

d = 220/145

d = 44/29

d ≈ 1.52 g/mL

The capacity of an object is measured by its volume. For instance, a cup's capacity is stated to be 100 ml if it can hold 100 ml of water in its brim. Here ice cube has particles that can be drawn closer to occupy smaller volume. The correct option is D.

Due to the strong intermolecular interactions, the solid molecules are very near to one another. Solids have a low volume and a high density as a result. Additionally, the solid molecules cannot be easily crushed due to the narrow intermolecular distance.

So here ice cube has small volume.

Thus the correct option is D.

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The order of reaction can be known from the rate equation.

The question is incomplete but I will try to explain the concept of order of reaction to you.

We have to note that when we talk about the order of the reaction what we mean is the order that we can be able to obtain from the stoichiometry of the reaction.

We do not only look at the reaction equation as we try to obtain the order of reaction but we rely so heavily on the empirical data that we can get from the reaction for the order of reaction in each specie.

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Answer:

Hypochlorous acid - Sodium hypochlorite

Explanation:

A buffer works when pH you want is ± 1 unit of pKa of the buffer. For example, for a buffer with pKa 7, it works between 6 and 8 (7-1 and 7+1).

pKa = -log Ka:

pKa boric acid - Sodium borate: 9.23. As you want a pH of 8.0. This buffer has a pKa too high.

pKa Hypochlorous acid - Sodium hypochlorite: 7.46. With this pKa, this buffer is a great choice to prepare it with a pH = 8.0

pKa Formic acid - Sodium formate: 3.74. This pKa is too low to make a buffer with pH = 8.0

Best choice is:

The wavelength of light that should be employed for nickel(II) ion is roughly 400–500 nm, according to the absorbance spectra displayed. This is due to the graph's observation of an absorbance peak with a maximum of roughly 0.8 in this region.

The plot of a substance's absorbance as a function of light wavelength is called the absorbance spectrum. The absorbance spectrum in this instance is for the nickel(II) ion.

The peak in absorbance shows that the nickel(II) ion's electrons are most easily moved from a lower energy state to a higher energy one by this particular wavelength of light. As a result, more light is absorbed, increasing the measured absorbance.

Depending on the particular experiment and the tools being used, a specific wavelength of light should be employed. However, judging by the absorbance spectrum displayed, measuring nickel(II) ion absorbance should be possible at a wavelength of roughly 400–500 nm.

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Answer:

The somatosensory cortex is a region of the brain which is responsible for receiving and processing sensory information from across the body, such as touch, temperature, and pain.

Area 1 specifically is important in sensing the texture of an object. :)

Hope this helps!

Answer: A

Explanation:

Cobalamin supplementation would be most appropriate in the case of Methionine synthase enzyme deficiencies.

An essential vitamin and medication, vitamin B12 (cobalamin) is used to manage and treat a variety of conditions, including pernicious anaemia, ileal resection, spinal cord myelopathy, and others. This activity goes over the benefits of cobalamin as a supplement, how it works, and any potential drawbacks. This activity will highlight the mechanism of action, adverse event profile, and other significant factors important for members of the interprofessional team of patients with pernicious anaemia, ileal resections, spinal cord lesions, and other related conditions (e.g., off-label uses, dosing, pharmacodynamics, pharmacokinetics, monitoring, relevant interactions).

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Answer:

E = 7.11 × \(10^{-7}\)  Cal

Explanation:

given data

efficiency = 25 %

solution

first we get here E by the power that is express as

p = \(\frac{E}{t}\)     ...........1

E = p × t

E = 1 ×  2 × \(\frac{1hp}{746w} \times \frac{1hr}{3600 s}\)  

E = 7.447 × \(10^{-7}\) J

and

Ein is get by efficiency

Ein = \(\frac{Eout}{\eta }\)        ..................2

Ein = \(\frac{7.447 \times 10^{-7}}{.25 }\)

Ein = 29.788 × \(10^{-7}\)  J

so required energy is

E = 29.788 × \(10^{-7}\)  ×  \(\frac{1Cal}{4.184J}\)

E = 7.11 × \(10^{-7}\)  Cal

Answer:

The total energy of the reaction can be calculated by finding the difference between the energy of the reactants and the energy of the products.

In this reaction, the energy of the reactants is given as 732 kJ/mol, which means that it takes 732 kJ of energy to break all the bonds in the reactants.

The total bond energy of the product side is given as 1256 kJ/mol, which means that it takes 1256 kJ of energy to break all the bonds in the products.

To find the total energy of the reaction, we can subtract the energy of the reactants from the energy of the products:

Total energy of the reaction = energy of the products - energy of the reactants

= 1256 kJ/mol - 732 kJ/mol

= 524 kJ/mol

The total energy of the reaction is 524 kJ/mol, which means that 524 kJ of energy is released during the formation of 2 moles of XY from 2 moles of X and 1 mole of Y2. The negative sign is not included because the reaction is exothermic and energy is being released.

To solve this problem using the gas laws, we need to use the Ideal Gas Law. This law states that the product of the pressure and the volume of a gas is proportional to the absolute temperature.

The equation of the Ideal Gas Law is the following:

\(\boxed{\large\displaystyle\text{$\begin{gathered}\sf \bf{\dfrac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2} } \end{gathered}$} }\)

Where:

We clear for V₂:

\(\boxed{\large\displaystyle\text{$\begin{gathered}\sf \bf{V_2=\frac{P_1V_1T_2}{P_2T_1 } } \end{gathered}$} }\)

Where:

Substituting the known values:

\(\boxed{\large\displaystyle\text{$\begin{gathered}\sf \bf{V_2=\frac{760\not{kPa}\times0.050 \ L\times20.0\not{k} }{ 380\not{kPa}\times10.0\not{k} } } \end{gathered}$} }\)

\(\boxed{\large\displaystyle\text{$\begin{gathered}\sf \bf{V_2=\frac{760 \ L}{3800 } } \end{gathered}$} }\)

\(\boxed{\boxed{\large\displaystyle\text{$\begin{gathered}\sf \bf{V_2\approx0.2 \ Liters} \end{gathered}$} }}\)