the amount of space an object occupies is called its

The Ka for the acid is 4.1 x 10⁻⁴.

Given that enough of a monoprotic acid is dissolved in water to produce a 1.12 M solution, and the pH of the resulting solution is 2.75.

We need to calculate the Ka for the acid. We can use the relationship between pH and Ka, which is given aspH = 1/2 (pKa - log Ka)

We can rearrange the above equation asKa = \(10^(^p^K^_a-2pH)\)

Now, we can substitute the given values in the above equation and solve for Ka.

pH = 2.75, [H+]

= \(10^-^2^.^7^5\)

= 1.78 x 10⁻³

Ka =  \(10^(^p^K^_a-2pH)\)Ka

= 1 \(10^(^p^K^_a-2pH)\)Ka

=  \(10^(^p^K^_a-2pH)\)Ka

= 4.1 x 10⁻⁴

To calculate the Ka of the acid, we will use the relationship between pH and Ka, which is given as pH = 1/2 (pKa - log Ka).We can rearrange the above equation as Ka =  \(10^(^p^K^_a-2pH)\).

Now, we can substitute the given values in the above equation and solve for Ka.We have first calculated the value of [H+] using the given pH, which is pH = -log[H+].

We then substituted the value of pH in the above equation to get the value of Ka. Hence, we have obtained the value of Ka for the monoprotic acid.

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Answer:

According to the law of conservation of mass, the mass of the reactants must be equal to the mass of the products

Explanation:

law of conservation of mass

Answer:47.05% is the percent yield of nitrogen in the reaction.

Explanation:

heoretical yield of nitrogen gas = x

Moles of ammonia =  

According to reaction,2 moles of ammonia gives 1 mol of nitrogen gas.

Then 2.3529 mol of ammonia will give:

of nitrogen gas

Mass of 1.1764 moles of nitrogen gas,x = 1.1764 mol × 28 g/mol=32.94 g

Experiential yield of nitrogen gas = 15.5 g

Percentage yield:

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47.05% is the percent yield of nitrogen in the reaction.

Answer:

Sound can move at approximately 0.21313 miles/second.

Explanation:

This expression gives us the ratio of the amount of ion x moved to the initial amount of ion x inside the cell.

Amount of ion x moved / Initial amount of ion x = 1 - (Vcell / (Vm * n)) * Δc

To derive the expression for the ratio of the amount of ion x moved to the initial amount of ion x inside the cell, let's consider an electrochemical cell with two compartments, separated by a selectively permeable membrane.

Let:

n = number of moles of ion x initially present inside the cell

z = charge of ion x (in terms of elementary charges)

F = Faraday's constant (96,485 C/mol)

E = cell potential

Vm = Nernst potential

According to the Nernst equation, the Nernst potential (Vm) can be expressed as:

Vm = (RT / zF) ln([x]out / [x]in)

Where:

R = gas constant (8.314 J/(mol·K))

T = temperature (in Kelvin)

[x]out = concentration of ion x outside the cell

[x]in = concentration of ion x inside the cell

The cell potential (E) is related to the Nernst potential (Vm) by the equation:

E = Vm - (RT / zF) ln([x]out / [x]in)

Now, let's consider the change in the amount of ion x inside the cell. The amount of ion x moved can be expressed as the difference between the initial amount (n) and the final amount (n - Δn), where Δn is the change in the amount of ion x.

The change in the amount of ion x can be related to the change in concentration using the formula:

Δn = n - (Vcell / Vm) * Δc

Where:

Vcell = cell volume

Δc = change in concentration of ion x

Substituting the expression for Δn into the ratio expression, we get:

Amount of ion x moved / Initial amount of ion x = (n - (Vcell / Vm) * Δc) / n

Simplifying the expression, we have:

Amount of ion x moved / Initial amount of ion x = 1 - (Vcell / (Vm * n)) * Δc

This expression gives us the ratio of the amount of ion x moved to the initial amount of ion x inside the cell.

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The curve represents saturation. Below the curve, the water is unsaturated. Above the curve, water is supersaturated. This means that more solute is present than the water can contain.

The line of the solubility curve indicates that the solution is saturated. A saturated solution is defined as a solution in which 100 g of solute is dissolved in 100 g of water. Simulations below this line indicate unsaturated solutions.

The difference between unsaturated and saturated solutes can be determined by adding very small amounts of solute to the solution. In unsaturated solutes, solutes will dissolve, and solutes in saturated solutes will not dissolve. In saturated solutes, crystals will form very quickly around the added solute.

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Answer:D

Explanation:it makes sense alot

Answer: D) A relative humidity of 95%

Explanation:

Answer:

beryllium atom

Explanation:

An atom with two protons is always a helium atom. If scientists count four protons in an atom, they know it's a beryllium atom.

Answer:

Beta particles have a charge of minus 1.

Explanation:

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Answer:

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Explanation:

Beta particles have a mass which is half of one thousandth of the mass of a proton and carry either a single negative (electron) or positive (positron) charge. As they have a small mass and can be released with high energy, they can reach relativistic speeds (close to the speed of light)

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a. Consistency is a term that matches the description: The agreement between several measurements of the same quantity.

b. Density matches the description: Ratio between the mass and volume of a substance.

c. Outlier matches the description: In a series of measurements of the same quantity, one that is significantly different from the others.

d. Mean matches the description: Mathematical value reported when a quantity is measured multiple times.e. Immiscible is a term describing two liquids that do not mix together.

Definition: Immiscibility is the property of not being miscible. When two or more liquids are not able to form a homogeneous solution when combined, they are immiscible. The term "miscible" refers to the property of being mixed. Therefore, immiscible liquids cannot be mixed together or dissolved in one another.

Limiting reagent (also known as limiting reactant) is a chemical reaction term that refers to the substance that limits the quantity of product that can be formed in a chemical reaction. It is the substance that is entirely consumed first, preventing the other reactants from reacting further. The amount of product generated is determined by the quantity of the limiting reagent. In a chemical reaction, the quantity of the product produced is determined by the limiting reactant, and the rest of the excess reagents will remain unchanged.

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The element belongs to the second group of the periodic table.

four ionization energies of the element are 738, 1450, 7730, and 10550 kJ mol¹ .

We can see that, there a large increase in the 3rd ionization energy. Which indicates that below the electrons removed by third and fourth ionization energy is considered as core electrons, and the first two electrons is considered as valence electrons.

So the valency of this element is 2,which indicates that it belongs to the second group of the periodic table and are known as Alkaline earth metals, with the outermost configuration ns2.

The second-most reactive metals in the periodic table are the alkaline earth metals, which include radium, barium, strontium, calcium, and beryllium. They have low electronegativity, low electron affinity, and low ionization energy. They are good electrical conductors and have an oxidation state of +2.

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1.50g of hydrofluoric acid is produced if 3.00 g of hydrogen reacts with excess fluorine with a 25 percent yield.

The balanced equation for the reaction of hydrogen (H2) and fluorine (F2) to form hydrofluoric acid (HF) is:

H2 + F2 -> 2HF

To calculate the amount of HF produced, we'll use the concept of theoretical yield and percent yield.

The theoretical yield is the maximum amount of product that can be formed based on the amount of reactants used.

Here, we're given that 3.00 g of hydrogen is used, so to find the theoretical yield of HF, we'll use the molar ratio of hydrogen to hydrofluoric acid in the balanced equation.

1 mol of H2 produces 2 mol of HF

So, 3.00 g of H2 produces 2*3.00g = 6.00g of HF

Percent yield is the ratio of the actual yield to the theoretical yield multiplied by 100%.

It's given that the yield is 25%.

So the actual yield of hydrofluoric acid will be:

Actual yield = (Theoretical yield) x (percent yield/100)

Actual yield = 6.00g x (25/100)

Actual yield = 1.50g

So, 1.50g of hydrofluoric acid is produced if 3.00 g of hydrogen reacts with excess fluorine with a 25 percent yield.

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Answer:

98.4 kPa

Explanation:

Step 1: Given and required data

Step 2: Calculate the total pressure of the gaseous mixture

The total pressure of the gaseous mixture (P) os equal to the sum of the partial pressures of the gases that form it.

P = pH₂O + pN₂ + pHe

P = 19.9 kPa + 53.0 kPa + 25.5 kPa = 98.4 kPa

The total pressure of the wet gas mixture is 98.4 KPa

This law states that at constant temperature, the total pressure of a mixture of gases is equal to the sum of the partial pressure exerted by each gas. Mathematically, it is expressed as

Total pressure = partial pressure of A + partial pressure of B

P = pH₂O + pN₂ + pHe

P = 19.9 + 53 + 25.5

P = 98.4 KPa

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Answer:

the base of the satellite should be positioned at (0,20)

the best model which describes the equation of the satellite is \(\mathbf{y = \dfrac{x^2}{80} + 20}\)

Explanation:

From the information given:

A satellite dish is designed in such a way that it can pick up radio waves coming from the space.

This satellite dish is designed in the shape of a parabola.

Location of the satellite is situated above the ground

Focus of the satellite is 40 ft above the ground

Using the ground as the x - axis

The objective here is to determine where should the base of the satellite be positioned?     &

Which equation best describes the equation of the satellite?

Using the ground as the x - axis;

Let say the x- axis start from the origin (0,0)

Then;

The Focus of the satellite which is 40 ft above the ground will be (0,40)

The position of the base of the satellite will be the vertex (h,k) which is at an equidistant position between the ground and the focus.

(h,k) = (0,20)

The model which best describes the equation of the satellite is as follows :

\((x - h)^2 = 4a(y - k) \\ \\ where ; \\ \\ (h,k) = (0,20) , \\ a = 20(x - 0)^2 = 4(20)(y - 20)\\ \\x^2 = 80( y - 20)\\ \\x^2= 80y - 1600\\ \\y = \dfrac{x^2}{80} + 20\)

Answer:

its ( 0,2 )

Explanation:

not ( 0, 20) because it said it was wrong and then gave me the answer. I hope this helps. :))))

A conjugate acid-base pair in this reaction is propanoic acid and propanoate. The correct answer is D.

In the given reaction, propanoic acid donates a proton (H⁺) to water and forms propanoate ion and hydronium ion (H₃O⁺).

The conjugate acid-base pairs are related by the transfer of a single proton (H⁺). In this reaction, the propanoic acid donates a proton to water and becomes the propanoate ion, which has one less H⁺. The water molecule accepts the proton and becomes the hydronium ion, which has one more H⁺. Therefore, the conjugate acid-base pair in this reaction are,

Propanoic acid (C₃H₅O₂H) and propanoate ion (C₃H₅O₂⁻).

Correct choice is D.

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Yes, \(Br^{-}\) and \(Cl^{-}\) ions both can be positively identified through  precipitation reaction or precipitimetry.

Through titration employing precipitation reaction or precipitimetry, these two ions can both be positively identified. When exposed to Cl- and Br- ions, AgNO3 transforms into silver halides. AgNO3 with Cl- ions precipitates white because AgCl is not particularly soluble in water, whereas AgNO3 with Br- ions precipitates cream.

A very light cream precipitate results from mixing cream and white ppt.

Both halides react as described below:

\(AgNO_{3}+ XCl\)\(= AgCl_{whiteppt.}\)

\(AgNO_{3}+ XBr\) \(= AgBr_{creamppt.}\)

Now, While AgBr does not dissolve in diluted ammonia, this AgCl precipitate does to create an Ag-diammonium ion combination. Two facts, including the fact that the ppt shade is now darker than the prior pale cream, demonstrate this. As a result of the addition of an ammonia solution, it becomes less concentrated, although some cream precipitates persist.

Second, concentrated ammonia dissolves the AgBr precipitate. AgBr precipitates dissolve when cream precipitate is filtered and concentrated ammonia is added. In solution Br- ions are confirmed by this.

\(Ag^{+}+NH_{3}\) ⇄ \((AgNH_{3} )_{2} ^{+}\)

The foregoing reaction switches in the right direction after the addition of diluted ammonia solution, and more and more Ag+ ions are complexed, producing the soluble form of Ag-diammonium complex.

Brown globules are produced when CHCl3 is added to the mixture and agitated.

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Therefore, CH₃CH₂OH (ethanol) is expected to have the largest intermolecular forces of attraction due to the presence of hydrogen bonding.

The substance CH₃CH₂OH (ethanol) is anticipated to have the strongest intermolecular forces of attraction among the substances CH₃CH₂CH₃ (propane), CH₃CH₂F (ethyl fluoride), and CH₃CH₂OH.

A hydrogen atom is joined to an oxygen atom to form a hydrogen bond in CH₃CH₂OH. When a hydrogen atom is bound to a highly electronegative atom (such oxygen, nitrogen, or fluorine) and interacts with another electronegative atom in a separate molecule, hydrogen bonding—a powerful intermolecular force of attraction—occurs.

In contrast, hydrogen bonds are absent from CH₃CH₂CH₃ and CH₃CH₂F. While ethyl fluoride (CH₃CH₂F) includes polar covalent connections but lacks the required hydrogen bound to a highly electronegative atom for hydrogen bonding, propane exclusively consists of nonpolar carbon-carbon and carbon-hydrogen bonds.

Because hydrogen bonds exist, it follows that CH₃CH₂OH (ethanol) will have the strongest intermolecular forces of attraction.

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Answer: To solve this problem, we need to use the Avogadro's number, which represents the number of particles (molecules or atoms) in one mole of a substance. The Avogadro's number is approximately 6.022 x 10²³ particles per mole.

First, we need to calculate the number of moles of CO₂ molecules in 2.5 x 10²⁵ molecules:

n = N/N_A

where:

n = number of moles

N = number of molecules

N_A = Avogadro's number

n = 2.5 x 10²⁵ / 6.022 x 10²³

n = 41.56 mol

Next, we can use the molar mass of CO₂ to convert moles to grams. The molar mass of CO₂ is approximately 44 grams per mole.

m = n x M

where:

m = mass in grams

n = number of moles

M = molar mass

m = 41.56 mol x 44 g/mol

m = 1826.24 g

Therefore, there are approximately 1826.24 grams in 2.5 x 10²⁵ CO₂ molecules.

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Explanation:

Answer:

freezing is a phase change from liquid to solid at atmospheric pressure

From the molarity of \(IO^{3-}\)in saturated solution #1 (\(8.84 . 10^{-6}\)), the equilibrium concentration of \(Ca^{2+}\) in that solution is: 4.42 x \(10^{-6}\) M  and the molar solubility of \(Ca(IO^3)^2\) in saturated solution is: 4.42 x \(10^{-6}\) M.

To determine the equilibrium concentration of Ca2+ in saturated solution #1 with a molarity of \(IO^{3-}\) at 8.84 x 10-6, and determine the molar solubility of\(Ca(IO^3)^2\) in that solution, follow these steps:

So, the equilibrium concentration of  \(Ca^{2+}\) in saturated solution #1 is 4.42 x \(10^{-6}\) M, and the molar solubility of \(Ca(IO^3)^2\) in that solution is 4.42 x \(10^{-6}\) M.

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Answer:

It has an atomic number of 27. The number of protons in an atom determines its atomic number.

Explanation:

Answer:

Atoms are at their most stable when their outermost energy level is either empty of electrons or filled with electrons.

Compound          Type of IMFs                   Sublime at STP?

Carbon dioxide       London dispersion         Yes

Hydrogen fluoride  Hydrogen bonding   No

Calcium chloride     Ionic bonding                  No

Naphthalene        London dispersion         Yes

Iodine                      London dispersion        Yes

Sodium chloride        Ionic bonding                 No

Water                    Hydrogen bonding         No

A chemical compound is described as  a chemical substance composed of many identical molecules containing atoms from more than one chemical element held together by chemical bonds.

London dispersion forces are also described as a type of intermolecular force acting between atoms and molecules that are normally electrically symmetric.

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Two substances, a and b were heated. Both substances change color. when cooled, both substances return to their original colors.

Changes within the size or form of matter are examples of physical change. Physical changes include transitions from one state to a different , like from solid to liquid or liquid to gas. Cutting, bending, dissolving, freezing, boiling, and melting are a number of the processes that create physical changes.

Physical changes occur when objects or substances undergo a change that doesn't change their chemical composition. This contrasts with the concept of chemical process in which the composition of a substance changes or one or more substances combine or break up to form new substances.

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Answer:

The number of half dollars in the stack of the height of the Gateway Arch in St. Louis is 89,313 half dollars

Explanation:

The given height of the Gateway Arch in St. Louis = 630 ft

The thickness of each half dollar = 2.15 mm

By conversion of factors, we have;

1 feet = 304.8 mm

Therefore;

630 ft. = 304.8 × 630 mm = 192,024 mm

The number of half dollars that will stack up to 630 ft or 192,024 mm, is therefore, given as follows;

The number, n, of half dollars in the stack of the height of the Gateway Arch in St. Louis = The height of the Gateway Arch in St. Louis/(The thickness of each half dollar)

n = 630 ft/(2.15 mm/(half dollar)) = 192,024 mm/(2.15 mm/(half dollar)) = 89,313.49 ≈ 89,313 half dollars

The number of half dollars in the stack of the height of the Gateway Arch in St. Louis = 89,313 half dollars.

Explanation: Pottasium reacts with water vigorously and the reation is exothermic. The heat released causes the hydrogen released to ignite.

Answer: Pottasium reacts with water vigorously and the reation is exothermic. The heat released causes the hydrogen released to ignite.

Answer:

Subatomic particles

Explanation:

I hope it helped

Answer

Dmitri Mendeleev Explanation:The modern periodic tables is credited primarily to the russian chemist Dmitri Mendeleev. Mendeleev's table is based on the periodic law, which states that when elements are arranged in order of increasing mass, their properties recur periodically.