When a gas-filled container is cooled, the pressure in the container decreases because the particles in the gas
a. have more kinetic energy.
b. have less kinetic energy.
c. attract each other.
d. move faster.

There are 4.48 × 10-3 moles of \(Na_{2}S_{2}O_{3}\) are required to dissolve 0.35 mol of AgBr in a 1.0 L solution if Ksp for AgBr is 3.3 × 10-13 and Kf for the complex ion \([Ag(S_{2}O_{3})_{2}]^{3-}\).

AgBr dissociates in water, and we can write the reaction as shown below:

\(AgBr = Ag^{+} + Br{-}\)

Since \(Ksp = [Ag^{+}][Br^{-}]\), we can obtain the equilibrium concentrations of \(Ag^{+}\) and \(Br^{-}\) from the Ksp value, using the stoichiometry of the balanced equation. Here, the concentration of  \(Br^{-}\)  is equal to that of \(Ag^{+}\).

Therefore, \(Ag^{+}\) =  \(Br^{-}\)  = √Ksp = √3.3 × 10-13 M\(\sqrt{Ksp} = \sqrt{3.3 * 10^{-13}} M\)  \(5.74 * 10^{-7}\) M. To determine the number of moles of \(Na_{2}S_{2}O_{3}\) required to dissolve 0.35 mol of AgBr in a 1.0 L solution, we must calculate the concentration of \([Ag(S_{2}O_{3})_{2}]^{3-}\) ion first.

Kf = \([Ag(S_{2}O_{3})_{2}]^{3-}\)./(\(Ag^{+}\)\([S_{2}O_{3}^{-2}]\))

For \(Ag^{+}\), we use the concentration obtained from Ksp:

\(Ag^{+}\)= \(5.74 * 10^{-7}\) M

Kf =  \(4.7 * 10^{13}\) mol-1L-3

\([Ag(S_{2}O_{3})_{2}]^{3-}\)= Kf × \([Ag(S_{2}O_{3})_{2}]^{3-}\)

=  \(Ag^{+}\)/Kf

\([Ag(S_{2}O_{3})_{2}]^{3-}\)

= (\(5.74 * 10^{-7}\) M)/(\(4.7 * 10^{13}\)  mol-1L-3 × (\(5.74 * 10^{-7}\) M)2)

= \(4.48 * 10^{-3}\) M

To find the number of moles of \(Na_{2}S_{2}O_{3}\) required to dissolve AgBr in 1 L of solution, multiply the concentration of \([Ag(S_{2}O_{3})_{2}]^{3-}\) by the volume of the solution:

\(4.48 * 10^{-3}\)  M × 1 L = \(4.48 * 10^{-3}\) moles \(Na_{2}S_{2}O_{3}\).

\(4.48 * 10^{-3}\) moles of \(Na_{2}S_{2}O_{3}\) are required to dissolve 0.35 mol of AgBr in a 1.0 L solution.

We used the stoichiometry of the balanced equation and the Ksp value to determine the concentration of [Ag+] and [Br-]. Then, we calculated the concentration of \([Ag(S_{2}O_{3})_{2}]^{3-}\). from the Kf value and the [Ag+] value obtained from Ksp.

Finally, we multiplied the concentration of \([Ag(S_{2}O_{3})_{2}]^{3-}\) by the volume of the solution to obtain the number of moles of \(Na_{2}S_{2}O_{3}\) needed to dissolve 0.35 mol of AgBr in a 1.0 L solution.

4.48 × 10-3 moles of \(Na_{2}S_{2}O_{3}\) are required to dissolve 0.35 mol of AgBr in a 1.0 L solution if Ksp for AgBr is  \(3.3 * 10^{-13}\) and Kf for the complex ion \([Ag(S_{2}O_{3})_{2}]^{3-}\) is \(4.7 * 10^{13}\)  mol-1L-3.

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Answer:

the pressure of the gas in torr is 2280 torr

Explanation:

The pressure of a gas in torr can be calculated by converting its pressure in kPa to atmospheres and then converting the atmospheric pressure to torr.

One atmosphere is equal to 101.325 kPa. Therefore, the pressure of the gas in atmospheres is 305 kPa / 101.325 kPa/atm = 3.00 atm.

One torr is equal to 1/760 of an atmosphere. Therefore, the pressure of the gas in torr is 3.00 atm * 760 torr/atm = 2280 torr.

Therefore, the pressure of the gas in torr is 2280 torr

Answer:

Protons have a positive charge.

Neutrons have no charge.

Electrons have a negative charge.

Explanation:

I hope this helps :)

If you use Copper (Cu) as the metal , Oxygen (O) and Carbon (C) as the c, then you can make 2 new compounds in five minutes.

The two possible compounds are:

Copper oxide (CuO) is a chemical compound composed of copper and oxygen. It is a black, solid material with a high melting point and is commonly referred to as cupric oxide or black oxide of copper.

CuO can be produced by heating copper in the presence of oxygen, or by reacting copper sulfate with sodium hydroxide. It is commonly used as a raw material in the production of copper salts, in the manufacturing of ceramics, as a pigment, and as a catalyst in various chemical reactions.

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There has been extensive research on how learning works across many different academic fields.

Thus,  Basic studies of the brain mechanisms underlying learning in humans and other species have traditionally been conducted in the fields of neurology and biology and learning.

Studies of how the human mind "computes," creating and applying knowledge, have typically been conducted in the fields of cognitive science and psychology and academic fields.

Studies of how machines (such as computers and robots) learn have typically been conducted in the fields of computer science and other branches of engineering; and studies of how learning occurs in the learning.

Thus, There has been extensive research on how learning works across many different academic fields.

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Answer:

if you could copy and paste the text or a picture of the options, i'd be more than happy to answer

Explanation:

:)

Variations in water density produce deep-ocean currents. Ocean currents are predominantly horizontal flows of water.

A continuous, directed movement of seawater caused by a variety of factors operating on the water, including as wind, and Coriolis effect, breaking waves, cabbeling, as well as temperature and salinity changes. Depth contours, shoreline patterns, as well as interaction with other currents all impact the direction and strength of a current.

Ocean currents are predominantly horizontal flows of water. An ocean current moves for long distances, forming the global conveyor, that plays a significant role in shaping the temperature of many of the Earth's areas. Variations in water density produce deep-ocean currents.

Therefore, variations in water density produce deep-ocean currents.

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Answer:

D. Ester

Polyesters are defined as (snooze alert!) long-chain polymers chemically composed of at least 85 percent by weight of an ester and a di-hydric alcohol and a terephthalic acid. The term refers to many (poly) esters (the building block compound—many fats and fragrances are esters).

Manufactured cellulose fibers come from plants that are processed into a pulp and then extruded in the same ways that synthetic fibers like polyester or nylon are made. Rayon or viscose is one of the most common "manufactured" cellulose fibers, and it can be made from wood pulp.

The Racah parameter (B) is used in the Racah theory to describe energy differences between electronic states in transition metal complexes. The Crystal Field Splitting Parameter quantifies the energy difference between d-orbitals caused by the interaction of the metal ion with ligands in a complex.

The Racah parameter (B) and the Crystal Field Splitting Parameter are both terms used in the field of coordination chemistry and describe different aspects of the electronic structure of transition metal complexes.

1. Racah Parameter (B):

The Racah parameter (B) is a parameter used in the Racah theory, which is a theoretical framework used to describe the electronic spectra of transition metal complexes. The Racah parameter determines the energy difference between different electronic states within the same electron configuration. It accounts for the splitting of energy levels arising from electron-electron repulsion effects in a complex.

2. Crystal Field Splitting Parameter:

The Crystal Field Splitting Parameter refers to the energy difference between the different sets of d-orbitals (often referred to as the crystal field splitting) in a transition metal complex. It arises from the interaction between the metal ion and its surrounding ligands. Ligands generate a crystal field that affects the energy levels of the metal's d-orbitals, causing them to split into different energy levels. The Crystal Field Splitting Parameter quantifies this energy difference.

In summary, the Racah parameter (B) is a parameter used to describe the energy differences between electronic states within a specific electron configuration, whereas the Crystal Field Splitting Parameter describes the energy difference between the different sets of d-orbitals caused by the interaction of the metal ion with its surrounding ligands.

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Ksp of PbBr₂ is 6.60 × 10⁻⁶. The molar solubility of PbBr₂ in pure water is 0.0118M.

Ksp or Solubility Product Constant is an equilibrium constant for the dissociation in an aqueous solution.

Molar solubility (S) is the concentration of the dissolved substance in a solution that is saturated.

Let the molar solubility be S upon dissociation.

PbBr₂ or Lead Bromide dissociates in pure water as follows:

                          PbBr₂ ----------> Pb⁺² + Br⁻

                                                     S      2S

Ksp = [Pb⁺²] [ Br⁻]

Ksp = (S) (2S)²

Ksp = 4S³

6.60 × 10⁻⁶ = 4S³

S = 0.0118M

Hence, the Molar solubility S is 0.0118M.

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Answer: D convection currents

Explanation:

The seafloor spreading is a phenomena that occurs due to liberation of heat from the convection currents generated in the mantle. It makes the earth crust more plastic and less dense. This happens at divergent plate boundaries. As the plates move apart, the less denser material rises. It leads to the formation of mountain and crust cracks.

Answer:

\(\begin{array}{lll}&State \ Government&Central \ Government\\Political \ parties \ in \ power&PDP&PDP\\Present \ area \ representative & Jude \ Ogbimi&Leo \ Ogor \\Opposition \ party&APC&APC\\Date \ of \ election&April \ 10 \ 2021&February\ 23\ 2019\\Date \ of \ next \ election&April \ 2025&February \ 2023\\Number \ of \ women&2&Non\end{array}\)

Explanation:

The People's Democratic Party, PDP, are the party in power in the Delta state House of Assembly, while the All Progressives Congress, APC, are the opposition party

Answer:

three atoms = 1 water molecule

3 × 6 = 18 atoms

................

Sodium plating from Na-β″-alumina ceramics at room temperature refers to a process that allows sodium ions (Na+) to be deposited onto a ceramic material called Na-β″-alumina at normal room temperatures. This breakthrough has significant implications for the development of fast-charging all-solid-state batteries.


The use of Na-β″-alumina ceramics is crucial in this process. Na-β″-alumina is a specific type of ceramic material known for its excellent ionic conductivity, particularly for sodium ions. This means that it allows the movement of sodium ions through its structure, which is necessary for the sodium plating process to occur.

In summary, sodium plating from Na-β″-alumina ceramics at room temperature is a breakthrough that allows sodium ions to be deposited onto a specific ceramic material. This advancement has the potential to accelerate the development of fast-charging all-solid-state batteries, which offer numerous advantages over conventional battery technologies.

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When steel and zinc were connected, zinc is the cathode. The term cathode refers to the electrode that is reduced during an electrochemical reaction.

The electrons are moved from the anode to the cathode during an electrochemical reaction in order to maintain a current in the wire that links the two electrodes.

According to the galvanic series, zinc is more active than iron, meaning that it is more likely to lose electrons and be oxidized. As a result, when steel and zinc are connected, zinc will act as the anode and lose electrons, whereas iron (steel) will act as the cathode and receive the electrons transferred by zinc.

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Frequency – The frequency of a wave is the number of waves that pass a given point in a certain amount of time. Frequency is measured in units called hertz (Hz), and is defined as the number of waves per second. A wave that occurs every second has a frequency of 1 wave per second (1/s) or 1 Hz.

The molarity of the given throat spray is 0.042 M.

Explanation :

What is Molarity?

Molarity is a measure of the concentration of a solute in a solution in terms of moles of solute per liter of solution. It is denoted by M or mol/L. It is calculated using the following formula:Molarity = Number of moles of solute / Volume of solution (in liters)

Calculating the Molarity

The throat spray has a density of 0.9956 g/mL. This means that 1 mL of the throat spray has a mass of 0.9956 g. Let the volume of the throat spray be V mL.

Therefore, the mass of the throat spray can be expressed as:

m = 0.0140 × V (since 1.40% mass phenol means 1.40 g of phenol in 100 g of solution)

Now, let's substitute the given values in the formula for molarity and simplify it:

Molarity (M) = Number of moles of solute / Volume of solution (in liters)

Number of moles of solute = Mass of solute / Molar mass

Molar mass of phenol (C6H5OH) = 6 × 12.01 g/mol (for C) + 5 × 1.01 g/mol (for H) + 16.00 g/mol (for O)= 94.11 g/mol (approx)

Molarity = Number of moles of solute / Volume of solution (in liters)= (0.000148 V) / (V / 1000)= 0.148 M/L= 0.042 M (approx.)

Therefore, the molarity of the given throat spray is 0.042 M.

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Answer:  

1.  DNA copying mistakes made during cell division, exposure to ionizing radiation, exposure to chemicals called mutagens, or infection by viruses.

2.  both

Explanation:  Since errors can occur when DNA replicates itself, mutations can occur in both asexually and sexually reproducing organisms.

Answer:

30%

Explanation:

As the formula for finding concentration

= (mass of solute/mass of solution)×100

= (30/100)×100

= 0.3×100

= 30%

The concentration is 30%.

As the formula for finding concentration

= (mass of solute/mass of solution)×100

= (30/100)×100

= 0.3×100

= 30%

The amount of a substance, such as salt, is in a positive amount of tissue or liquid, along with blood. A substance turns into more concentrated whilst much less water is present.

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Answer:

d = 3 g/cm³

Explanation:

Given data:

Mass of stone = 27 g

Volume of water = 10 cm³

Volume of water+ stone = 19 cm³

Volume of stone = ?

Density of stone = ?

Solution:

Volume of stone = total volume - volume of water

Volume of stone = 19 cm³ -  10 cm³

Volume of stone = 9 cm³

Density of stone:

d = m/v

d = 27 g/ 9 cm³

d = 3 g/cm³

Two isotopes of the same element only have these differences: atomic mass

Isotopes are forms of an element that have the same number of protons and electrons but differing numbers of neutrons. The various isotopes of an element have varying weights depending on the amount of neutrons present in each isotope.

Chemically speaking, an element's isotopes are nearly or completely identical. The chemical behaviours of several isotopes are quite similar. But each isotope has a unique set of physical characteristics, including as mass, melting or boiling temperature, density, and freezing point. Any isotope's physical characteristics are mostly influenced by its mass.

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ANSWER

option D

EXPLANATION

When a full bag of trash is placed in a compactor, the compactor will compress the bag so as to allow more trash to fill in. This is done by increasing the capacity of the trash.

Therefore, the volume of the trash bag will changed

Hence, the correct answer is option D

The wavelength becomes longer, and the energy decreases.

What is a wavelength?

A wavelength is a measure of the distance between two successive crests or troughs of a wave. It is usually measured in meters, and is the inverse of the frequency of a wave. Wavelengths can be used to describe light, sound, and other forms of energy.

The Doppler effect is responsible for this phenomenon. As the star moves away from Earth, its light waves become stretched out, reducing their frequency and energy. This is because the star is receding from us, so the light waves have to travel a longer distance to reach us, resulting in a decrease in frequency and energy.

What is Doppler effect ?

Doppler effect is an effect that occurs when the frequency of a wave changes as the source and observer move relative to each other. It is commonly observed in sound waves, where the frequency of a sound wave changes when either the source or observer moves. This effect is also seen in light waves, in which the frequency changes when the source and observer move towards or away from each other.

Hence, Option A is correct.

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Answer:

The liquid will freeze

Explanation:

well see... all the other answers require INCREASING the temp, so yeah.

please brainliest me. i just gave away 1300 points in the last 24 hours for questions like "what is 1+1"

Answer:

24

Explanation:

The energy, in kj, is transferred between the system and surroundings when 250. 0 g of potassium fluoride is dissolved into water, the molecular mass of kf is 58. 10 g/mol is 745 kJ per second  thermodynamics

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Answer:

16 g

Explanation:

Step 1: Write the balanced equation

2 Na + Cl₂ ⇒ 2 NaCl

Step 2: Identify the limiting reactant

The theoretical mass ratio (TMR) of Na to Cl₂ is 46:71 = 0.65:1.

The experimental mass ratio (EMR) of Na to Cl₂ is 10:10 = 1:1.

Since EMR > TMR, Cl₂ is the limiting reactant

Step 3: Calculate the mass of NaCl produced

The theoretical mass ratio of Cl₂ to NaCl is 71:117.

10 g Cl₂ × 117 g NaCl/71 g Cl₂ = 16 g NaCl

The enzyme aconitase catalyzes the isomerization of citrate followed by a dehydration reaction.

Isomerization is a process in which a molecule undergoes a structural change, but the molecular formula remains the same. In this case, citrate is converted into isocitrate, which is an important step in the citric acid cycle.

Aconitase is a member of the iron-sulfur protein family that contains a [4Fe-4S] cluster, and it is involved in catalyzing the isomerization of citrate in the citric acid cycle. This enzyme has two active sites, one of which is responsible for the isomerization reaction, and the other is responsible for the dehydration reaction.

Aconitase works by binding to the citrate molecule and causing it to undergo a structural change. This results in the formation of an intermediate molecule called cis-aconitate. The dehydration reaction is then catalyzed by the enzyme, which removes a molecule of water from the cis-aconitate to produce isocitrate.

The reaction catalyzed by aconitase is important because it helps to generate energy for the cell. The citric acid cycle is a metabolic pathway that is used by cells to generate ATP, which is the primary source of energy for cellular processes. The isomerization of citrate is a critical step in this pathway because it helps to convert the energy stored in food molecules into a form that can be used by the cell.

Therefore, the correct answer is option e) isomerization; dehydration.

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