Is each of the following very soluble in water? Explain.
(a) Lithium nitrate

As per the given reaction one mole of magnesium hydroxide reacts with 2 moles of potassium metal to give one mole of Mg. Therefore, 12 moles of potassium reacts to give 6 moles of Mg metal.

In a displacement reaction, one element or group is displaced from the reactant by the other reactant. The given reaction is an example of single displacement reaction.

As per the balanced chemical equation of the reaction, 1 mole of magnesium hydroxide reacts with 2 moles potassium metal to form one mole of Mg metal and 2 moles of potassium hydroxide.

Here, 12 moles of potassium is taken. Then, the number of moles of Mg metal formed is just half the number of moles of K. That is 6 moles of magnesium metal.

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The reaction related to your question is given below:

Mg(OH)₂ + 2K ⇒2KOH + Mg

A separation process is a method that divides a mixture or solution of chemical compounds into two or more different product mixtures. It is a scientific approach of separating two or more substances in order to achieve purity.

How are chemical brews divided?

Mixtures can be separated using a variety of techniques. Chromatography on a solid medium necessitates solvent separation. Distillation involves the use of several boiling points. Evaporation removes a liquid from a solution, leaving a solid behind.

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Answer: a ) NaCl

b) No compound.

Explanation:

Atomic number of A is 11 , thus it is sodium. It has electronic configuration of 2,8,1 and thus has 1 valence electron and can form \(Na^+\).

Atomic number of B is 18 , thus it is argon. It has electronic configuration of 2,8,8 and thus it is an inert gas.

Atomic number of C is 1 , thus it is hydrogen. It has electronic configuration of 1. It can only share electrons.

Atomic number of D is 17 , thus it is chlorine. It has electronic configuration of 2,8,7 and thus has 7 valence electron and can form \(Cl^-\).

a) A and D :

Here Sodium is having an oxidation state of +1 called as \(Na^+\) cation and anion is \(Cl^-\). Thus they combine and their oxidation states are exchanged and written in simplest whole number ratios to give neutral \(NaCl\)

b) B and C

As B is an inert gas , it wont combine with C.

The photosynthetic machinery generates enough energy to transfer electrons from H2O to NADPH through a series of light-dependent reactions, specifically in the photosystem II (PSII) and photosystem I (PSI) complexes, coupled with the electron transport chain and the production of ATP.

During the light-dependent reactions of photosynthesis, the photosynthetic machinery captures light energy and converts it into chemical energy in the form of ATP and NADPH. The process involves several steps:

Overall, the photosynthetic machinery generates enough energy through the absorption of light, the excitation and transfer of electrons, and the establishment of a proton gradient to drive the transfer of electrons from water (H2O) to NADPH, while also producing ATP. This energy conversion is essential for the synthesis of carbohydrates and other organic molecules during the Calvin cycle, the light-independent reactions of photosynthesis.

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Answer:

Explanation:

Mide 2mL de etanol, añadelo a un matraz aforado, pon agua hasta llegar a 100mL

The compounds ranked by their expected lattice energy from greatest to least are: MgF_2, MgCl_2, MgBr_2, MgI_2.

Lattice energy is a measure of the energy released when gaseous ions come together to form an ionic solid. It is influenced by factors such as ion charge and ion size. In general, as the charges of the ions increase, the lattice energy also increases. However, when comparing ions with the same charge, the size of the ions becomes the determining factor.

In the given compounds, the common ion is Mg_2+ (with a +2 charge), while the anions are F-, Cl-, Br-, and I-. Among these anions, fluoride (F-) has the smallest ionic radius, followed by chloride (Cl-), bromide (Br-), and iodide (I-). Smaller ions have a higher charge density, meaning the positive charge is concentrated in a smaller space, leading to stronger attractive forces between the ions.

Therefore, based on ion size, the compound with the greatest expected lattice energy is MgF_2, followed by MgCl_2, MgBr_2, and MgI_2, with MgF_2 having the strongest bond and MgI_2 having the weakest bond.

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The sample containing the least number of atoms is 1 mol of H2O.

In this sample, there are three atoms: two hydrogen atoms and one oxygen atom.

Atoms are the fundamental units that make up everything we see, feel, and experience around us.

Everything, including the air we breathe, the food we eat, and the clothes we wear, is made up of atoms.

They are so tiny that they cannot be seen even with the most powerful microscope.SampleA sample is a subset of a population that is chosen for investigation.

A sample is a representation of the whole population and is chosen to ensure that the results of the study can be generalized to the entire population.

The number of atoms in a sample varies depending on the substance.

The Avogadro's number of atoms is contained in 1 mole of any substance.

The mole is a unit of measurement used in chemistry to measure the quantity of a substance.

In conclusion, the sample containing the least number of atoms is 1 mol of H2O.

In this sample, there are three atoms: two hydrogen atoms and one oxygen atom.

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Answer:

It is the "Bhor's Model"

Explanation:

Nearly two-thirds of the students ranked the electron cloud and Bohr-model as their two most preferred representations. Students invoked ideas from classical mechanics to interpret the electron cloud model and used probabilistic language to describe the Bohr model of the atom.

Answer:

Explanation:

Answer:

Translate your language to English ok

The standard free energy change (ΔG°) for a reaction can be calculated using the standard free energy of formation (ΔG°f) values of the reactants and products. The equation for the reaction is: CH3COOH(l) + 2O2(g) ⟶ 2CO2(g) + 2H2O(g).

To calculate ΔG°, we need to know the ΔG°f values for CH3COOH(l), CO2(g), and H2O(g). Unfortunately, the ΔG°f value for CH3COOH(l) is missing from the question. Without this value, we cannot determine the exact ΔG° for the reaction.

The question does not provide the ΔG°f value for CH3COOH(l), so we cannot calculate the exact standard free energy change (ΔG°) for the reaction. The ΔG°f values represent the free energy change when one mole of a compound is formed from its constituent elements in their standard states.

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Answer:

C2H6 OR C6H12O6 THE ANSWER

Explanation:

C2H6

!!!!!!!!!!

because it has both hydrogen and carbon as given in the word "Hydro-carbon"

There are various types of hazards that can be found in a chemistry laboratory. Here are two of them: Chemical Hazards and Physical Hazards.

1. Chemical Hazards: Chemical hazards are substances that have the potential to cause physical or health harm when exposed to humans or the environment. These may include substances that are poisonous, flammable, or explosive. They may be gases, liquids, or solids. Chemical hazards can be toxic or reactive. Toxic chemicals are poisonous and can cause damage to organs, irritation of skin and eyes, and respiratory issues. Reactive chemicals may combust or react dangerously with other substances if they are not handled properly.

2. Physical Hazards: Physical hazards are objects or conditions that have the potential to cause physical harm to individuals in the laboratory. These may include objects such as glassware, sharp objects, and electrical equipment. Glassware can break and cause cuts and lacerations, while sharp objects can puncture or cut skin. Electrical equipment can cause electric shocks or fires if not handled correctly. Physical hazards can also include environmental hazards such as loud noises or extreme temperatures, which can cause hearing loss or thermal burns.

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Based on the description of the graph, the law that is based on it is A. Boyle's law.

Boyle's law states that, at a constant temperature, the pressure and volume of a gas are inversely proportional to each other. In other words, as the volume of a gas decreases, the pressure increases, and vice versa, when the temperature remains constant.

The graph described shows a curve that starts high on the horizontal axis (indicating a large volume) and curves toward the origin, indicating a decrease in volume. As the volume decreases, according to Boyle's law, the pressure of the gas would increase. The leveling out of the curve as it approaches the horizontal axis suggests that there is an equilibrium point where the pressure and volume have stabilized.

Therefore, the graph aligns with the behavior predicted by Boyle's law, which establishes the inverse relationship between pressure and volume for a given amount of gas at a constant temperature. Therefore, Option A is correct.

The question was incomplete. find the full content below:

Which law is based on the graph that is shown below?

A graph is shown with pressure on the horizontal axis and volume on the vertical axis. A curve starts high on the horizontal axis, curves toward the origin, and then starts to level out as it approaches the horizontal axis.

A. Boyle’s law

B. Charles’s law

C. Dalton’s law

D. Gay-Lussac’s law

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Due to Incomplete combustion, a candle produces a yellow flame and due to complete combustion, an LPG burner produces a blue flame.

A candle is made of wax, which does not burn completely. As a result, candles have partial combustion, which gives them their yellow color. On the other hand, LPG (Liquified Petroleum Gas), burns at approx. around 1,960°C temperature. Hence, LPG burners have complete combustion, giving them their blue color.

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Answer:

When matter interact with EMR then spectrum is obtained. We can understand both spectra using Bohr's hydrogen spectrum. let's have a look on Bohr's hydrogen spectrum what does it say. It says when a electron gains energy it moves from one energy level to other(lower to higher) which is Absorption phenomenon. When the electrons returns from excited state to ground state they emits several spectral lines. this spectrum is called as emission spectrum. inshort the

Emission spectrum is spectrum of electromagnetic radiations that were emitted from the higher energy state(Excited state) to lower energy state(Ground state). and study of emission spectrum is known as AES (Atomic Emission spectroscopy).

When an atom or ion is subjected to EMR, it absorbs certain level of radiations, and when this absorbed energies are studied under spectroscopy they are plotted as absorption spectrum, and study of Absorption spectrum is known as AAS (Atomic Absorption spectroscopy).

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When a nitrile is treated with LiAIH4, followed by water, an amine is obtained.

A nitrile is a functional group that consists of a carbon triple bond to a nitrogen atom (-C≡N), which can be converted to an amine group (-NH2) via reduction using a strong reducing agent, lithium aluminum hydride (LiAIH4), and subsequent hydrolysis with water. The reaction is shown below:

RC≡N + 4[H] ⟶ RCH2NH2

When a nitrile is reduced with LiAIH4, it produces the corresponding imine, which is then hydrolyzed with water to form the corresponding primary amine. The mechanism of the reaction involves the transfer of a hydride ion (H-) from LiAIH4 to the nitrile carbon, followed by the addition of a water molecule to the imine carbon, and finally protonation of the intermediate to give the corresponding primary amine.

Therefore, the correct option is An amine is obtained when a nitrile is treated with LiAIH4, followed by water.

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A. In the case of a pure liquid, the vapor in equilibrium with it has the same composition as the liquid.

B. A nonvolatile solute raises the boiling point of a solvent because the solute particles occupy some of the solvent space, increasing the solution's entropy, and making it harder for the solvent molecules to escape into the gas phase.

C. When the cap is removed from a bottle of a carbonated beverage, carbon dioxide gas escapes from the liquid due to a decrease in pressure.

A. When a liquid is in a closed container, it will evaporate until the vapor pressure of the liquid is equal to the pressure of the surrounding atmosphere.

At this point, the liquid is said to be in equilibrium with its vapor. In the case of a pure liquid, the vapor in equilibrium with it will have the same composition as the liquid, as the liquid is not affected by the presence of any other substance.

In the case of a solution, however, the composition of the vapor may not be the same as that of the liquid. This is because the presence of a solute in the solution affects the vapor pressure of the solvent.

The vapor pressure of the solvent is lowered, as the solute molecules occupy some of the space at the surface of the solution where evaporation occurs. As a result, the vapor in equilibrium with the solution will have a lower concentration of solvent molecules and a higher concentration of solute molecules than the solution itself.

B. When a solute is added to a solvent, it disrupts the attractive forces between the solvent molecules, making it harder for them to escape into the gas phase.

As a result, the boiling point of the solution is higher than that of the pure solvent. This effect is known as boiling point elevation. The magnitude of the boiling point elevation is proportional to the concentration of the solute particles in the solution.

On the other hand, when a solution is cooled, the solvent molecules begin to form a solid crystal lattice. In the absence of a solute, the solvent molecules would arrange themselves in an orderly way, forming a pure solid.

However, the presence of a solute disrupts this arrangement, preventing the solvent molecules from packing together as efficiently. As a result, the freezing point of the solution is lower than that of the pure solvent. This effect is known as freezing point depression.

C. When a bottle of carbonated beverage is sealed, it contains a high concentration of dissolved carbon dioxide gas. This is because the gas has been dissolved under high pressure, which keeps it in solution. When the cap is removed, the pressure inside the bottle decreases, allowing some of the dissolved carbon dioxide to escape from the liquid and form bubbles.

The rate at which the gas escapes depends on factors such as the temperature and pressure of the surroundings, the amount of dissolved gas, and the shape of the container.

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The statement that "there are many types of energy" is correct. Energy is a fundamental concept in science and refers to the ability of a system to do work or cause a change. There are many different types of energy, each with its own characteristics and properties.

One of the most familiar forms of energy is light energy, which is produced by the sun and other sources of radiation. Sound energy is another form of energy that is produced by vibrations in matter, and it can be detected by the human ear. Thermal energy is the energy associated with the temperature of an object, and it is related to the movement of atoms and molecules within that object.

Chemical energy is stored in the bonds between atoms and molecules, and it is released during chemical reactions. Electrical energy is associated with the movement of electrons through a conductor, and it is used to power many of the devices we use every day. Other forms of energy include nuclear energy, gravitational energy, and kinetic energy.

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Materials that are best suited for incineration to reduce total volume, produce energy, and have minimal release of air pollutants include non-hazardous waste, such as paper, cardboard, and plastics.

These materials have high calorific values and can be easily combusted to produce energy, while their non-organic components, such as metals and glass, can be collected and recycled.

Additionally, organic wastes, such as food waste and yard waste, can also be effectively incinerated to produce energy, while reducing their volume and preventing them from emitting methane gas during anaerobic decomposition in landfills.

However, it is important to note that the incineration of certain materials, such as hazardous waste and medical waste, require specialized incineration processes to ensure the complete destruction of harmful substances and prevent the release of toxic air pollutants.

In general, proper waste segregation and identification of hazardous materials is crucial to ensure safe and effective incineration processes.

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In the chemical reaction the reactants are oxygen and ethanolc acid while the product are water and carbon dioxide.

In a chemical reaction, reactants are the substances that react with each other to form products.

Therefore, oxygen and ethanoic acid are reactants while carbon dioxide and water are products.In a combustion reaction, a substance is burned in the presence of oxygen, resulting in the release of heat and light.

During this reaction, the oxygen reacts with the substance to produce carbon dioxide and water. In the given reaction, ethanoic acid (CH3COOH) is burned in the presence of oxygen (O2), producing carbon dioxide (CO2) and water (H2O).

Thus, oxygen and ethanoic acid are reactants, while carbon dioxide and water are products.

The combustion reaction of ethanoic acid is shown as follows:

2CH3COOH + 3O2 = 2CO2 + 2H2O + heat and light

This means that for every two molecules of ethanoic acid and three molecules of oxygen that react, two molecules of carbon dioxide and two molecules of water are produced. The heat and light produced are also released.

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A redox reaction's hydroxide ion component involving oxidation or reduction is referred to as a half reaction. By taking into account, we get a half reaction.

The diatomic anion OH, which is made up of oxygen and hydrogen atoms, is most frequently referred to in chemistry as hydroxide. It is among the known simplest diatomic ions. The group of substances that contain the hydroxide ion is referred to as "hydroxide" as well.

Galvanic cell with Zn and Cu as an example. CuSO4(aq) Zn(s) + CuSO4(aq) (s) Oxidation occurs at the Zn anode (the metal loses electrons). This can be seen in the oxidation half-reaction shown below (see how the electrons are on the products side): Zn(s) equals Zn2+ + 2e.

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Answer:

Informercials, like the class Shamwow Informercial are an example of how structure and technique can have a huge effect on how a user or prospect is driven towards taking a specific action like clicking a buy button.

Informercials follow a specific structure that any small business can use to drive action but few businesses ever consider using it when they pitch their product or service. In this post, we'll describe the structure and give you examples of how you can use it in your business.

The question above wants to test your ability to create an infomercial using your creativity. For that reason, I can't create an infomercial for you, but I'll show you how to create one.

First, you need to know that an infomercial is an advertisement made to be played on television, usually associated with sales, but can be used to present information.

Based on this, you should create your newsletter as follows:

In the image below, you can see a tutorial on how to make an infomercial.

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Answer:

Xe that is xenon

Explanation:

Xe that is xenon

Answer:

1=B

2=A

3=A

Explanation:

Any subsatance with a ph of less than 7 is acidic.

Bases measure over 7

Answer:

Yes, they are useful.

Explanation:

They allow us to make use of strengths and benefits of a particular element while not being hampered by it's faults.

Answer:

B) 14g of nitrogen

Explanation:

To calculate number of molecules in 9g of water, we first convert mass to mole by using mole = mass/molar mass i.e.

mole = 9g/18g/mol of water

mole = 0.5mol

Next, we multiply by 6.022 × 10^23 molecules to get 3.011 × 10^23 molecules in 9g of water (H2O).

- For hydrogen gas: Molar Mass = 2g/mol, mass = 2g

mole = 2/2 = 1

No. of molecules = 1 × 6.022 × 10^23 = 6.022 × 10^23 molecules.

- For Nitrogen gas: Molar Mass = 28g/mol, mass = 14g

mole = 14/28 = 0.5mol

No. of molecules = 0.5 × 6.022 × 10^23 = 3.011 × 10^23 molecules.

- For Oxygen gas: Molar Mass = 32g/mol, mass = 32g

mole = 32/32 = 1mol

No. of molecules = 1 × 6.022 × 10^23 = 6.022 × 10^23 molecules.

- For carbondioxide gas: Molar Mass = 44g/mol, mass = 44g

mole = 44/44 = 1mol

No. of molecules = 1 × 6.022 × 10^23 = 6.022 × 10^23 molecules.

Based on he results of each calculation, NITROGEN contains the same number of molecules as 9g of water