Calculate the percent dissociation for a 0.22 M solution of chlorous acid (HClO2,Ka=1.2×10−2).

The sample of Ar would reach a pressure of 2.5 atm at a temperature of 267 K (-6.15 °C or 20.6 °F).

To answer this question, we can use the Ideal Gas Law which states that PV = nRT, where P is pressure, V is volume, n is the number of moles of gas, R is the gas constant, and T is temperature in Kelvin. We can rearrange this equation to solve for temperature: T = PV/nR.

First, we need to find the number of moles of gas in the 5 liter sample of Ar. Using the density of Ar, we can calculate the mass of Ar in the sample:

mass = density x volume = 1.54 g/L x 5 L = 7.7 g

Next, we can use the molar mass of Ar (39.95 g/mol) to calculate the number of moles:

moles = mass/molar mass = 7.7 g/39.95 g/mol = 0.193 moles

Now we can plug in the values for pressure (2.5 atm), volume (5 L), number of moles (0.193 moles), and gas constant (0.08206 L atm/mol K) to solve for temperature:

T = PV/nR = (2.5 atm)(5 L)/(0.193 mol)(0.08206 L atm/mol K) = 267 K

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This problem is providing us with the isotopic mass of Ga-71 and its percent abundance, so the isotopic mass of the second isotope is required. At the end, the result turns out to be 68.92547 amu.

In chemistry, isotopes are known as atoms of an element with different atomic masses (isotopic mass) but equal number of protons. In addition, they have a natural occurring abundance as a percentage.

Thus, this problem can be solved by writing the following weighted average for the atomic mass of Gallium:

\(m_{Ga}=m_{Ga-71}*\%ab_{Ga-71}+m_{Ga-?}*\%ab_{Ga-?}\)

Hence, since both percent abundances must sum 100 %, that of the second isotope will be 60.108 %. However, since its mass is unknown, one can use the average atomic mass of Gallium consigned in the periodic table in order to write the following, after plugging in what we have so far:

\(69.723=70. 9247050 amu *0.39892+m_{Ga-?}*0.60108\)

Hence, one can solve for the unknown as follows:

\(m_{Ga-?}=\frac{69.723amu-70. 9247050 amu *0.39892}{0.60108} \\\\m_{Ga-?}=68.92547amu\)

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Answer:

soluteswws

Explanation:

An Arrhenius base is a molecule that when dissolved in water will break down to yield an \(OH^-\) or hydroxide in solution.

An Arrhenius base is a compound that increases the OH− ion concentration in aqueous solution.

An Arrhenius base is a substance that, when dissolved in an aqueous solution, increases the concentration of hydroxide, or \(OH^-\), ions in the solution.

Bases Properties

Arrhenius bases that are soluble in water can conduct electricity.

Bases often have a bitter taste and are found in foods less frequently than acids. Many bases, like soaps, are slippery to the touch.

Bases also change the colour of indicators. Red litmus turns blue in the presence of a base (see figure below), while phenolphthalein turns pink.

Some bases react with metals to produce hydrogen gas.

Acids (pH < 7.0) react with bases (pH > 7.0) to produce a salt and water. When equal moles of an acid and a base are combined, the acid is neutralized by the base. The resulting mixture will have a more neutral pH.

An Arrhenius acid is a substance that dissociates in water to form hydrogen ions or protons. In other words, it increases the number of H+ ions in the water. In contrast, an Arrhenius base dissociates in water to form hydroxide ions, \(OH^-.\)

Example, sodium hydroxide, is added to an aqueous solution. NaOH dissociates into sodium, \(Na^+\), and hydroxide, \(OH^-,\) ions.

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Answer:

1. FALSE

2. TRUE

3. TRUE

4. FALSE

5. FALSE

6. TRUE

7. TRUE

8. TRUE

9. TRUE

10. TRUE

Explanation:

1. Conduction occurs more readily in solids and liquids

2. Gold is used as a contact metal in the electronics industry as it is a good conductor of both electricity and heat.

3. None

4. Radiation is the fastest mode of heat transfer while conduction is the slowest mode of heat transfer

5. Heat from Sun reaches us by the process of radiation

6. None

7. It is the motion of particles that creates a form of energy called heat (or thermal) energy that is present in all matter

8. At a temperature of 0o C, the thermal energy within a given system is also zero

9. None

10. None

PLEASE MARK BRAINLIEST, THANKS <3

The standard free-energy change at 25 ∘C for the given reaction, Mg(s)+Fe₂+(aq)→Mg₂+(aq)+Fe(s) can be calculated using the equation:ΔG∘ = ΣnΔGf∘ (products) − ΣnΔGf∘ (reactants)where ΔGf∘ is the standard free energy of formation of the compound, n is the stoichiometric coefficient of each compound in the reaction.

The values of ΔGf∘ for the given reaction are:

Mg₂+ (aq):−467.2 kJ/mol Fe(s): 0 kJ/mol Fe₂+(aq): −237.2 kJ/mol Mg(s): 0 kJ/molΔG∘ =

ΣnΔGf∘ (products) − ΣnΔGf∘ (reactants)ΔG∘ =

[ΔGf∘ (Mg₂+ (aq)) + ΔGf∘ (Fe(s))] - [ΔGf∘ (Mg(s)) + ΔGf∘ (Fe₂+(aq))]ΔG∘ =

[−467.2 kJ/mol + 0 kJ/mol] - [0 kJ/mol + (−237.2 kJ/mol)]ΔG∘ =

−230.0 kJ/mol At 25 ∘C, the standard free-energy change for the given reaction is −230.0 kJ/mol. The units of ΔG∘ are kilojoules per mole (kJ/mol). Hence, the answer is -230.0 kJ/mol.

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The Combustion is the the limiting reactant.

What is combustion ?

The generation of heat and light in the form of flame together with a chemical reaction that often entails the presence of oxygen. When a substance interacts with oxygen, a chemical reaction known as combustion occurs that generates heat. Among them are ethane, wood, and propane. The word for these compounds is exhaust. The majority of the exhaust is produced by chemical processes involving fuel and oxygen.

What is reaction ?

In a chemical reaction, one or more chemicals change into one or more other substances. For instance, the reaction between iron and oxygen results in rust. Sodium acetate, carbon dioxide, and water are the end products of the reaction between vinegar and baking soda.

Therefore, the Combustion is the the limiting reactant.

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Answer:

it's volume also decrease

Answer:

acetone evaporates faster than hexane.

Explanation:

because acetone does nor participate in hydrogen bonding, so it's intermolecular forces are comparatively weaker, and it evaporates most quickly.

The noble gases have a full outer shell of valence electrons, making them stable and unreactive. They are colorless, odorless gases at room temperature and have very low boiling points. Their lack of reactivity makes them useful in a variety of applications, including lighting and welding.

The properties that are common to each of the following chemical families include:

(a) Alkali metals The alkali metals have a single valence electron in their outermost shell, which is easily lost to form an ion with a charge of +1. They are the most reactive metals, reacting with water and air to produce hydrogen gas and an oxide layer, respectively. They are silvery-white and have a soft texture.

(b) Alkaline earth metals The alkaline earth metals have two valence electrons in their outermost shell, which they readily lose to form ions with a charge of +2. They are less reactive than the alkali metals, but they still react with oxygen to form an oxide layer on their surface. They are also silvery-white in color and have a harder texture than the alkali metals.

(c) Halogens The halogens have seven valence electrons in their outermost shell, making them highly reactive nonmetals. They readily form ions with a charge of -1 by gaining an electron. They are diatomic molecules at room temperature and can be found in a variety of colors and states of matter.

(d) Noble gases The noble gases have a full outer shell of valence electrons, making them stable and unreactive. They are colorless, odorless gases at room temperature and have very low boiling points. Their lack of reactivity makes them useful in a variety of applications, including lighting and welding. These properties are common to each of the following chemical families.

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Answer:

four moles could be produced

Explanation:

The computation of the number of moles for producing from the dissolution is shown below:

Given that

\(Na_3[Fe(Cl)_6]\)

It could be disassociated as

\(Na_3[Fe(Cl)_6] \leftrightharpoons 3Na^{+} + [Fe(Cl)_6]^{-3}\)

Therefore \(3Na ^{+}\) ions and 1 \([Fe(Cl)_6]^{-3}\) could be generated

And from 1 mole of \(Na_3[Fe(Cl)_6]\),

= 3 + 1

= 4 moles

Therefore four moles could be produced

By considering the above calculation we can easily determine the number of moles

24.6 mL of distilled water must be added to 75.0 ml of 0.332 m FECL3(aq) to reduce its concentration to 0.250 m.

The abundance of a constituent divided by the total volume of a mixture is called concentration.

The reduction of the concentration from 0.332 M to 0.250 M corresponds to the dilution of : 0.332M/0.250 M = 1.328;

Add distilled water to the solution up to 1.328 times the first volume: 75 ml x 1.328 = 99.6 mL.

Now, take the 75 mL of 0.332 M, and add distilled water up to the volume of 99.6 mL, that is you add 24.6 mL of distilled water.

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Electrolysis is a process, which allows us to break down a chemical compound into its elements, completing the balance by adjusting the number of atoms on both sides of the reaction is important because the number of electrons given up during oxidation must be the same as the number of electrons gained during the reduction.

It is a process of oxidation and reduction of one or more elements that, through the induction of electric current, breaks down the water molecule (H2O), thus producing gaseous hydrogen and oxygen.

Oxidation and reduction processes occur simultaneously and never in isolation, which is why they are called redox reactions.

Therefore, we can conclude that electrolysis is a process where electrical energy will change to chemical energy where it is important that the number of electrons given up during oxidation is the same as the number of electrons gained during reduction.

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Answer:

Directly & Pressure

Explanation:

Oumm...I don't know if it's right but correct me if I'm wrong

When propanal reacts with excess of methanol in the presence of HCl, it forms 1,1-dimethoxy propane.

C2​H5​−CHO+2CH3​OHHCl​(1,1−diethoxy propane)C2​H5​−CH(OCH3​)2​​

Propanol belongs to the primary type of alcohol. The chemical formula of propanol is CH3CH2CH2OH. This is a colourless liquid and is also sometimes called propan-1-ol, n-propyl alcohol, 1-propyl alcohol, or n-propanol.

(i) Propanal having α-hydrogen atom undergo aldol condensation in presence of dil. NaOH and forms 3-hydroxy-2-methyl pentanal.

C2​H5​−CHO+(dilute)NaOH​⟶C2​H5​−OH∣CH​−CH∣CH3​​−CHO

(ii) The carbonyl group of propanal is reduced to CH2​ group on treatment with hydrazine followed by heating with KOH in ethylene glycol and the product formed will be propane.

C2​H5​−CHONH2​−NH2​−H2​O​C2​H5​−C∣∣N​−NH2​KOH/ethylene glycolheat​C2​H5​−CH3​+N2​

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Answer:

have g8igcicg9ccgco

Explanation:

gcohogxzrxog floor. gi gi gi gi. r. uvgi7rz. g yde6ifkg. gg g goog oh g of ifz8fd8dti

Answer:

3)N2, H2, Cl2........

The process by which heated, or hot liquid rises, cools, and then sinks is called convection.

Convection is the process by which heated, or hot liquid rises, cools, and then sinks. Convection currents are also responsible for the circulation of air in the atmosphere and the flow of currents in the ocean. In fluid dynamics, the term "convection" refers to the movement of heat or mass as a result of the collective motion of molecules within fluids (liquids or gases).

The heat transfer is caused by a temperature difference across the fluid. Heat flows from the hot region to the cold region, resulting in fluid motion. Convection is driven by differences in temperature or density within a fluid. When a fluid is heated, it expands, becomes less dense, and rises. Cooler, denser fluid sinks to replace the rising fluid. This process results in the formation of convection currents.

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Its is different because Iron-59 contains 33 neutrons. We also call it the same because it has 26 protons.

Due to its 33 neutrons, iron-59 differs from other iron isotopes. Due to the fact that all isotopes have 26 protons, they are all the same.

What are Isotopes?
Isotopes two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei, and hence differ in relative atomic mass but not in chemical properties; in particular, a radioactive form of an element.

Hence, Iron-59 is different form other isotopes of iron because it contains 33 neutrons. It is the same as other isotopes because they all contain 26 protons.

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The specific heat of water is 4.184 J/goC.

What is specific heat?

The quantity of heat needed to increase the temperature of one gram of a substance by one degree Celsius. Typically, the units of specific heat are calories or joules per gram per degree Celsius. The specific heat of water, for instance, is 1 calorie (4.186 joules) per gram per degree Celsius.

The total mass of the solution =g of KNO3 + g of water

= (2.58+ 98.57) g

= 101.15 g

Change in temperature =(20.4 – 22.5) degree celcius = -2.1 degree celcius

q = mcΔT= 101.15 g x 4.184 j/goC x -2.1oC= -8 8.74 J

Moles of KNO3= 2.58/101.11= 0.0255 mol

The heat that is being lost by the water is being gained by KNO3 so it is + heat of solution per mole(J)= 888.74 J/0 .0255 mol= 34829.82257 J/mol= + 35 K J/mol

Hence, the heat of solution per mole is kno3 is 35KJ/mol

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Answer:

its B

Explanation:

a p e x

Answer:

the answer is b. allows electricity to flow easily

Answer:

12 g

Explanation:

From the question given above, the following data were:

Number of atoms = 6.02×10²³ atoms

Mass of ₆C¹² =?

From Avogadro's hypothesis,

1 mole of any substance contains 6.02×10²³ atoms. This implies that 1 mole of ₆C¹² also contains 6.02×10²³ atoms i.e

1 mole of ₆C¹² = 6.02×10²³ atoms

Recall

From the period,

1 mole of ₆C¹² = 12 g

Thus,

12 g of ₆C¹² = 6.02×10²³ atoms

Therefore, 12 g of ₆C¹² contains 6.02×10²³ atoms

Colonialism had a profound impact on East Africa, shaping its development and laying the groundwork for ongoing conflicts in the region. The effects of colonial rule can be seen in political, economic, social, and cultural aspects.

Firstly, colonial powers imposed arbitrary borders without considering the ethnic, cultural, and historical realities of the region. This led to the creation of artificial nation-states that encompassed diverse ethnic groups, often resulting in internal tensions and conflicts. The borders created during colonialism continue to be a source of contention and have fueled separatist movements and territorial disputes.

Secondly, colonial powers exploited the region's resources for their own benefit. Natural resources such as minerals, land, and labor were extracted and exported, leading to economic imbalances and underdevelopment in East Africa. This legacy of resource exploitation and economic dependency has contributed to ongoing economic challenges and inequality in the region.

Moreover, colonial powers imposed their own systems of governance, administration, and education, which marginalized local populations and suppressed their cultural practices and identities. These legacies of political and cultural domination have perpetuated divisions and grievances, fueling conflicts along ethnic, religious, and political lines.

Furthermore, the colonial legacy of divide and rule tactics, such as favoring certain ethnic groups or promoting ethnic rivalries, has left a lasting impact on the political landscape of East Africa. Political power struggles, exclusionary policies, and competition over resources have contributed to conflicts and power struggles that persist to this day.

In conclusion, colonialism in East Africa had far-reaching consequences. It disrupted local social structures, exploited resources, created artificial borders, and imposed foreign systems of governance. These factors have shaped the region's development and set the stage for current conflicts by exacerbating ethnic tensions, perpetuating economic inequalities, and fostering political instability. Understanding the historical context of colonialism is crucial for comprehending the complexities of the conflicts and challenges faced by East Africa today.

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Once upon a time, there was a spacecraft named "Dawn" that was launched on a mission to study the dwarf planet Ceres. The spacecraft was equipped with state-of-the-art technology and a team of highly skilled scientists and engineers were aboard to control and monitor the mission.

As Dawn approached Ceres, the team was amazed at the vast, barren landscape that stretched out before them. They couldn't wait to start collecting data and analyzing the planet's surface. However, soon after they arrived, they encountered a problem. The spacecraft's landing gear malfunctioned and they were unable to land on the surface.

The team quickly came up with a plan B and decided to study Ceres from orbit. They began to collect data and take pictures of the planet's surface. They were shocked to find that Ceres had a surprisingly varied landscape, with towering mountains, deep craters, and mysterious bright spots.

As the mission continued, the team discovered that Ceres had a subsurface ocean beneath its icy crust. The team was thrilled at this discovery and knew that it would greatly contribute to the understanding of our solar system.

However, just as they were about to wrap up their studies, the team received a distress signal from a nearby spacecraft that was in trouble. Without hesitation, the team of Dawn set course to investigate and assist.

As they neared the other spacecraft, they saw that it was under attack by a group of rogue asteroids. The team of Dawn quickly came up with a plan and using their advanced technology, they were able to defend the other spacecraft and destroy the asteroids.

The other spacecraft, grateful for the help, thanked the team of Dawn and they continued on their journey. The team of Dawn, proud of their bravery and the success of their mission, returned to Earth with a wealth of new data and knowledge about Ceres and the Solar System.

The Dawn spacecraft mission was a great success and it helped scientists understand more about the dwarf planet Ceres, and it also demonstrated the courage, resourcefulness, and the sense of camaraderie of the team.

Answer:

3,000,000,000

Explanation:

3 x (10⁹)=

3 x (1,000,000,000)

= 3,000,000,000

Answer: Radhika loves to eat sweets and chocolates. She asks her mother for the same before and after every meal. This is an example of bad eating habit.

Explanation:

Both sweets and chocolates contain high amount of fat and sugar. When Radhika is eating the same before and after every meal then it means she is consuming it in excess.

When we eat too much of sweets and chocolates then its remains get deposited in between our tooth and when they remain over there for hours then more amount of bacteria is formed.

Due to this bacteria our tooth starts to decay.

Hence, it is advised even by the doctors to eat sweets and chocolates occasionally and not regularly.  

Thus, we can conclude that Radhika loves to eat sweets and chocolates. She asks her mother for the same before and after every meal. This is an example of bad eating habit.

Answer:

Chemists

Explanation:

The answer is: