if a cylinder of n20 is at 10.5 atm, and has a volume of 5.00 l at 298 k, how many moles of n20 gas are present

a) 2Na₂N → 2Na + N₂ reaction type combination reaction.

b) H₃PO₄ +3KOH → K₃PO₄ + 3H₂O reaction type double-Replacement Reaction.

c) N₂ + 3H₂ → 2NH₃ reaction type combination reaction.

d) 2H₂O₂ → O₂ + 2H₂O reaction type combination reaction.

e) Zn + 2HCl  → ZnCl₂ + H₂ reaction type displacement reaction.

f) C₂H₆ + 7O₂  → 2CO₂ + 3H₂O reaction type combustion reaction.

g) CuCl₂ + H₂S  → CuS + 2HCl reaction type double displacement reaction.

The reaction arrow's left and right sides of a balanced equation have an equal number of each type of atom. The products go on the right side of the arrow when writing a balanced equation, and the reactants go on the left.

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The equation that represents a single replacement reaction given the various options is 2Al(s) + 6HCl -> 2AlCl₃(aq) + 3H₂O(g) (option 2)

A single replacement reaction, also known as single displacement reaction is a reaction in which elements higher in the electro-chemical series displace or replace elements lower in the electro-chemical series displace from a solution.

The following example illustrates single replacement reaction:

A + BC -> AC + B

From the above reaction, we can see that A has replace/displace B to from AC.

With the above information, we can determine the equation that represents single replacement reaction. Details below:

Equation from the questions:

From the above, we can see that only 2Al(s) + 6HCl -> 2AlCl₃(aq) + 3H₂O(g) conform to single replacement reaction.

Thus, the correct answer to the question is: 2Al(s) + 6HCl -> 2AlCl₃(aq) + 3H₂O(g) (option 2)

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What happens to the state of liquid water if enough heat is added?

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Answer:

Explanation:

Decomposition reaction, also known as analysis or dissociation, is a type of chemical reaction in which a compound breaks down into simpler substances or elements. In this reaction, a single reactant undergoes a chemical change and produces two or more products.

The decomposition reaction can be represented by the general equation:

AB → A + B

Where AB is the reactant, and A and B are the products. The reactant AB is usually a compound, and it breaks down into its constituent elements or simpler compounds.

There are different types of decomposition reactions, including:

Thermal decomposition: It occurs when a compound is heated, resulting in its decomposition into simpler substances. For example, the thermal decomposition of calcium carbonate (CaCO3) produces calcium oxide (CaO) and carbon dioxide (CO2):

CaCO3 → CaO + CO2

Electrolytic decomposition: It takes place when an electric current is passed through an electrolyte, causing it to break down into its component ions. For instance, the electrolysis of water (H2O) leads to the decomposition into hydrogen gas (H2) and oxygen gas (O2):

2H2O → 2H2 + O2

Photochemical decomposition: It occurs when a compound undergoes decomposition due to exposure to light energy. Chlorine gas (Cl2) can decompose into chlorine atoms (Cl) under the influence of light:

Cl2 → 2Cl

These are just a few examples of decomposition reactions. They are important in various chemical processes and are used in industries, laboratory experiments, and natural phenomena. By understanding and controlling decomposition reactions, scientists can gain insights into the behavior of different compounds and develop practical applications in fields such as chemistry, materials science, and environmental science.

Answer:

Explanation:

reaction in which a compound breaks down into simpler substances or elements

Answer

F) The pressure of a gas exerted on the walls of its container is inversely proportional to the volume of the gas when the temperature of the gas remains constant.

Explanation

Boyle's law states that the volume of a given mass of gas varies inversely with the pressure when the temperature is kept constant. An inverse relationship is described in this way. As one variable increases in value, the other variable decreases. He discovered that doubling the pressure of an enclosed sample of gas, while keeping its temperature constant, caused the volume of the gas to be reduced by half.

The Fischer projections of the four aldotetroses, D- glucose, and L‑glucose are shown in the attached figures below.

In chemistry, the Fischer projection can be described as a two-dimensional representation of a 3-D organic molecule by projection. Fischer projections were proposed for carbohydrates and used by chemists, particularly in organic chemistry and biochemistry.

The main aim of Fischer projections is to show the chirality of a molecule and to differentiate between a pair of enantiomers. Some notable uses involve drawing sugars and depicting isomers.

All chemical bonds are represented as horizontal lines or vertical lines. The carbon chain is represented vertically and represented by the center of crossing lines. The orientation of the carbon chain is represented in such a way that the first carbon C₁ is at the top.

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Answer:

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The five scientists who contributed to the discovery of the cell are Robert Hooke, Antonie van Leeuwenhoek, Matthias Schleiden, Theodor Schwann, and Rudolf Virchow.

The discovery of the cell as the fundamental unit of life involved the collective efforts of several scientists. Robert Hooke, an English physicist, was the first to observe and name cells while examining cork under a microscope in 1665.

Around the same time, Antonie van Leeuwenhoek, a Dutch scientist, improved microscopes and made detailed observations of various microorganisms, further advancing our understanding of cells.

In the mid-19th century, Matthias Schleiden, a German botanist, proposed that all plants are composed of cells, and Theodor Schwann, a German zoologist, extended this concept to animals.

Their combined work led to the formulation of the Cell Theory, which states that cells are the basic building blocks of all living organisms.

Rudolf Virchow, a German physician, later contributed to the development of the Cell Theory by emphasizing the idea that cells arise only from pre-existing cells, rejecting the notion of spontaneous generation. Virchow's work highlighted the significance of cell division and its role in growth, development, and disease.

Through their cumulative efforts, Hooke, van Leeuwenhoek, Schleiden, Schwann, and Virchow made significant contributions to our understanding of cells, paving the way for modern cell biology and numerous advancements in the field of life sciences.

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The better choice of compound to add to the sidewalk to prevent ice would be the 55 g/mol salt with an n value of 3.

A higher n value will result in a greater freezing point depression, which means that the solution will have a lower freezing point. In other words, the 55 g/mol salt will lower the freezing point of water more than the 40 g/mol compound, making it a more effective ice melter.

It is important to note that the amount of salt or other ice melter that you need to use will depend on the conditions. For example, you will need to use more salt in colder weather. You should also be careful not to use too much salt, as this can be harmful to plants and animals.

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Answer:

Cyclohexane, water, mercury.

Explanation:

One result of Archimedes' principle is that, in a container, the substance with the highest density will be in the bottom of the container and the substance with the lowest density, will be in the top of the container.

In the test tube with mercury, water and cyclohexane. In the top you will have cyclohexane (Least dense), in the middle will be the water and in the bottom will be mercury.

From the top to the bottom:

Cyclohexane, water, mercury.

A raindrop reaching the earth’s surface with constant velocity. The correct option is C.

Thus, The term "dynamic equilibrium" describes a situation in which conflicting processes happen at equal speeds and produce a stable state.

Two opposing forces are at work when a raindrop travels at constant speed toward the earth's surface: gravity pulls the raindrop downward and air resistance pushes against it. The raindrop falls at a steady velocity when these forces are in dynamic equilibrium.

The beam of a beam balance is in static equilibrium when it is horizontal (option a), meaning that no net forces or torques are exerted on it.

Thus, A raindrop reaching the earth’s surface with constant velocity. The correct option is C.

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Answer:

Copper undergoes oxidation and its oxidation number increases.​

Explanation:

Copper, here, gains an oxygen molecule on the products' side, so it gets oxidized. When oxidized, the oxidizing number increases, so your answer is D.

The half-life of radioactive elements is 46 days.

We need to know about the half-life of the radioactive elements to solve this problem. The radioactive element will decay over time depending on the half-life and follow the equation

N = No(1/2)^(t/t'')

where N is the final quantity, No is the initial quantity, λ is the decaying constant, t is time and t'' is the half-life of a radioactive element.

From the question above, we know that

No = 8 mg

N = 0.5 mg

t = 184 days

By substituting the given parameters, we can calculate the half-life

N = No . (1/2)^(t / t'')

0.5 = 8(1/2)^(184 / t'')

1/16 = (1/2)^(184 / t'')

(1/2)^4 = (1/2)^(184 / t'')

4 = 184/t''

t'' = 184/4

t'' = 46 days

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Answer: During succession, new species move into an area and colonize it.

Explanation: Ecological succession refers to the process of change in the composition and structure of an ecosystem over time. It occurs due to the interactions between the biotic (living) and abiotic (non-living) components of an environment. As succession progresses, new species gradually establish and thrive in the area, leading to a change in the species composition. This process can occur over a long period of time, ranging from decades to centuries, depending on various factors such as environmental conditions and the specific type of succession.

i don't really know what you are trying to say here, but what i think you are saying is what sounds like a more impressive job?? in my opinion, pseudoscience sounds more fancy and interesting. Since not a lot of people really knows what that is, it sparks conversation.

Answer:

https://brainly.in/question/5343031 use this link

Explanation:

According to the question;

A student takes notes in class as shown below. A. Uses an objective process Is updated constantly B. Is not objective Does not use a process Resists new information.

So the best titles for circumstances A and B will be :

Option C ;

A) characteristics of science because of the scientific methods used for notes taking

B) limitations of science because of the non scientific method or Science resistive methods used for notes taking

The molar concentration of Al(OH)₃ in the solution is 1.61 M.

we need to calculate the number of moles of Al(OH)3 in the solution:

Number of moles of Al(OH)₃ = mass of Al(OH)3 / molar mass of Al(OH)3

Molar mass of Al(OH)₃ = (1 x atomic mass of Al) + (3 x atomic mass of O) + (3 x atomic mass of H)

Molar mass of Al(OH)₃ = (1 x 26.98 g/mol) + (3 x 16.00 g/mol) + (3 x 1.01 g/mol) = 78.00 g/mol

Number of moles of Al(OH)₃ = 62.7 g / 78.00 g/mol = 0.804 moles

Next, we need to calculate the volume of the solution in liters:

Volume of solution = 500.0 mL = 500.0 mL x (1 L/1000 mL) = 0.500 L

Finally, we can calculate the molar concentration of Al(OH)₃

Molarity = moles of solute/volume of solution in liters

Molarity = 0.804 moles / 0.500 L = 1.61 M

Therefore, the molar concentration of Al(OH)₃ in the solution is 1.61 M.

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Answer:

A balanced ionic equation shows the reacting ions in a chemical reaction. These equations can be used to represent what happens in precipitation reactions or displacement reactions.

Precipitation reactions

In a typical precipitation reaction, two soluble reactants form an insoluble product and a soluble product.

For example, silver nitrate solution reacts with sodium chloride solution. Insoluble solid silver chloride and sodium nitrate solution form:

AgNO3(aq) + NaCl(aq) → AgCl(s) + NaNO3(aq)

The Na+ ions and NO3- ions remain separate in the sodium nitrate solution and do not form a precipitate. Ions that remain essentially unchanged during a reaction are called spectator ions.This means these can be ignored when writing the ionic equation. Only how the solid silver chloride forms is needed to be shown:

Ag+(aq) + Cl-(aq) → AgCl(s)

In a balanced ionic equation:

the number of positive and negative charges is the same

the numbers of atoms of each element on the left and right are the same

Displacement reactions

Displacement reactions take place when a reactive element displaces a less reactive element from one of its compounds.

A common type of displacement reaction takes place when a reactive metal reacts with the salt of a less reactive metal. For example, copper reacts with silver nitrate solution to produce silver and copper(II) nitrate solution:

2AgNO3(aq) + Cu(s) → 2Ag(s) + Cu(NO3)2(aq)

In this reaction, the NO3- ions remain in the solution and do not react - they are the spectator ions in this reaction. So, they can be removed from the ionic equation:

2Ag+(aq) + Cu(s) → 2Ag(s) + Cu2+(aq)

Question

Explain why this ionic equation is balanced:

Ba2+(aq) + SO42-(aq) → BaSO4(s)

Hide answer

There are the same numbers of atoms of each element on both sides of the equation. The total charge on both sides is also the same (zero).

Question

Balance this ionic equation, which represents the formation of a silver carbonate precipitate:

Ag+(aq) + CO32-(aq) → Ag2CO3(s)

Hide answer

2Ag+(aq) + CO32-(aq) → Ag2CO3(s)

Question

Balance this ionic equation, which represents the displacement of iodine from iodide ions by chlorine:

Cl2(aq) + I-(aq) → I2(aq) + Cl-(aq)

Hide answer

Cl2(aq) + 2I-(aq) → I2(aq) + 2Cl-(aq

Explanation:

this will help, I used this for my work x

AgNO₃ (aq) + NaCl (aq) → AgCl (s) + NaNO₃(aq) is the complete chemical equation taking place between the 2 reactants.

Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.

A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .

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Answer: \(3.2 \times 10^{-13}\)

Explanation:

\(K_w=[\text{H}^{+}] \times [\text{OH}^{-}]\)

However, as this is pure water, \([\text{H}^{+}]=[\text{OH}^{-}]\), meaning that \(K_w=([\text{H}^{+}])^2\).

We can find \([\text{H}^{+}]\) from the pH.

\(\text{pH}=-\log([\text{H}^{+}])\\\\6.25=-\log([\text{H}^{+}])\\\\\)

\([\text{H}^{+}]=10^{-6.25}\).

Therefore, \(K_w=(10^{-6.25})^2 =3.2 \times 10^{-13}\).

Answer:

B is the answer

Explanation:

ik this because I take the class

Answer:

chloroplast

Explanation:

In the extraction of solutes A and C from a mixture using a batch equilibrium process involving three mixing-settler units, we'll use the optimal amount of solvent from the first question, which is 9.98 kg for 100 kg mixture. We will use the same procedure as in the previous question to find the optimal solvent flow rate for each mixing-settler unit.

The extraction yield will not change regardless of the solvent feed to each mixing-settler unit because the mass of solvent used is constant. The resulting graph indicates that the total operating cost of the process increases as the solvent feed to each mixing-settler unit decreases.

This is due to the fact that a greater amount of labor and mixing-settler units are required to separate the same quantity of solutes A and C in the mixture as the solvent feed to each mixing-settler unit decreases. Therefore, a higher feed rate of solvent to each mixing-settler unit should be utilized for a more cost-effective extraction process.

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Answer:

Bacteria has 1 cell and An Animal has multiple cells.

Explanation:

Bacteria is a cell its self. While An Animal, It has multiple cells that create multiple tissues, and those tissues create multiple organs, those organs make up an organ system. After the Organ System, it's an organism.

Organism = Animal, Human, Ect.

Meanwhile, Bacteria is made up ONE CELL (bacteria it's self is 1 cell)

So the answer is "Bacteria has 1 cell and An Animal has multiple cells."

I hope this helped!! <33

Answer:

Hot air is to be cooled as it is forced to flow through the tubes exposed to atmospheric air. a. True b. False

B. False

Explanation:

Kp is the equilibrium constant in terms of partial pressures, while Kc is the equilibrium constant in terms of concentrations.

To calculate Kp from Kc, we need to use the ideal gas law, which relates the partial pressure of a gas to its concentration. At equilibrium, the partial pressure of each gas is directly proportional to its concentration.

For the reaction 2X(g)+3Y(g)⇌ 2Z(g), the equilibrium constant Kc is given as 0.0223 M−3 at 359 K.

To calculate Kp, we need to write the expression for the equilibrium constant in terms of partial pressures.

Assuming ideal gas behavior, we can write the equation as:

\(Kp = (pZ)^2/(pX^2 * pY^3)\)

where pX, pY, and pZ are the partial pressures of gases X, Y, and Z respectively.

We can substitute the equilibrium concentrations into this equation, and then convert them to partial pressures using the ideal gas law.

Finally, we can substitute these values into the Kp expression to get the answer.

Note that the equilibrium constant Kp does not depend on the total pressure of the system, only on the partial pressures of the gases involved in the reaction.

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Answer:

.6 M

Explanation:

.45 moles / .750 liters = .6 M

Answer:

D as in :D lol

Answer:

1.27 atm.

Explanation:

The following data were obtained from the question:

Pressure (P) in torr = 968 torr

Pressure (P) in atm =...?

Thus, we can convert from torr to atm by doing the following:

Recall:

760 torr = 1 atm

Therefore,

968 torr = 968/760 = 1.27 atm

Therefore, 968 torr is equivalent to 1.27 atm.

The equilibrium constant (K) for the reaction at 25°C is approximately 1203.56.

To calculate the equilibrium constant (K) at 25°C for a reaction with a given standard Gibbs free energy change (ΔG°), you can use the following equation:

ΔG° = -RT ln(K)

where ΔG° = -4.22 kcal/mol, R is the gas constant (in kcal/mol·K), and T is the temperature in Kelvin.

1. Convert the temperature to Kelvin: T = 25°C + 273.15 = 298.15 K
2. Convert R to kcal/mol·K: R = 0.001987 kcal/mol·K
3. Rearrange the equation to solve for K: ln(K) = -ΔG° / (RT)
4. Substitute the values: ln(K) = -(-4.22 kcal/mol) / (0.001987 kcal/mol·K × 298.15 K)
5. Calculate ln(K) ≈ 7.094
6. Find K by taking the exponent: K = e^(7.094) ≈ 1203.56

The equilibrium constant (K) for the reaction at 25°C is approximately 1203.56.

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Answer:

Royal jelly is a honey bee secretion that is used in the nutrition of larvae and adult queens.

Nuptial flight: a flight of sexually mature social insects (as bees) in which mating takes place and which is usually a prelude to the forming of a new colony; especially : the mass flight and mating of winged sexual forms of ants after leaving the parent nest.

Cocoon: a silky case spun by the larvae of many insects for protection in the pupal stage.

Group B:

Not sure) a- Keep in cold places because when there are changes in weather, it could help the silkworm come out faster.

b-They live together in a large, well organized group and bees engage in complex activities that required works from other community members in the bee society.

c- i dont know this part sorry =(

d-The larvae of a silk moth secrete the silk thread which is used to make clothes. Honey bees produce and store honey which is nutritious food. Silkworm is a creamy white colored insect which is about 2-3 cm long and shining in nature Bee larvae have been shown to be an excellent food source for rearing insects

Explanation:

Answer:

For group A

Explanation:

1. A royal jelly is a substance that is secreted by the worker honeybee's. This is fed to a potential queen bee to help them grow.

2. The nupital flight is part of reproduction for ants, termites, and most bee species.

3. A cocoon is used for the resting pupal stage in the life cycle of animals like butterflies and moths. It is a protective covering and is silky.

4. They feed on mulberry leaves.

Out of the molecules F₂, B₂, O₂, N₂, only O₂ is paramagnetic. Therefore, the correct answer is (B) 1. Paramagnetic substances have unpaired electrons in their molecular orbitals.

In O₂, there are two unpaired electrons, which makes it paramagnetic. On the other hand, F₂, B₂, and N₂ have all of their electrons paired in their molecular orbitals, making them diamagnetic. Diamagnetic substances do not exhibit any unpaired electrons and are weakly repelled by a magnetic field.

O₂ is the only molecule among the given options that is paramagnetic due to its unpaired electron configuration, while F₂, B₂, and N₂ are diamagnetic as they have all of their electrons paired in their molecular orbitals.

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