which of the following are standard conditions for an electrochemical cell? 1. solutes in aqueous solution have a concentration of 1.0 m. 2. gaseous reactants or products have a pressure of 1 atm. 3. solids are present in quantities of 1 mole.

The mass of Nickel(II) phosphate = 5508.646 g

Given

9.06 x 10²⁴ of Nickel(II) phosphate

Required

The mass

Solution

1 mol = 6.02 x 10²³ particles(molecules,ions, atoms)⇒Avogadro's number

So mol Nickel(II) phosphate :

n = N : No

n = 9.06 x 10²⁴ : 6.02 x 10²³

n = 15.05

mass of Nickel(II) phosphate(Ni₃(PO₄)₂ , MW=366.023 g/mol) :

mass = mol x MW

mass = 15.05 x 366.023

mass = 5508.646 g

Answer:

I think the answer is D...

When NaCl, AlCl3, and CaCl2 are dissolved in water, they dissociate into their respective ions. The balanced chemical equations for the dissociation of these salts in water are:

NaCl (s) + H2O (l) → Na+ (aq) + Cl- (aq)

AlCl3 (s) + 6H2O (l) → Al3+ (aq) + 3Cl- (aq) + 6H2O (l)

CaCl2 (s) + 2H2O (l) → Ca2+ (aq) + 2Cl- (aq) + 2H2O (l)

In these equations, (s) represents solid, (l) represents liquid, and (aq) represents aqueous, or dissolved in water. When these salts dissolve in water, they separate into their respective cations and anions, which are now free to move about in the solution and interact with other ions or molecules present.

These dissociation reactions are essential for understanding the behavior of ionic compounds in solution, as they provide insight into how these compounds interact with water and other dissolved species.

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Answer:

I believe is the npp i kinda forgot how to do these lol

Diagram with npp type shows an atom that is not a form of hydrogen.

An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether solid,liquid , gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.

The protons are positively charged and neutrons are neutral and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.

Atoms of the same element are similar as they have number of sub- atomic particles which on combination do not alter the chemical properties of the substances.

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Answer:

2nd option is correct

2,2,4,1

Approximately 35.90 grams of ice must melt to lower the water temperature to 0.0°C.

To solve this problem, we need to calculate the amount of heat that needs to be transferred from the water to the ice in order to lower the water temperature to 0.0°C.

First, let's calculate the initial heat content of the water. The specific heat capacity of water is 4.186 J/(g·K), and the mass of the water can be calculated using its density (1 g/mL) and volume (7.30 × 10^2 mL):

Mass of water = density × volume = 1 g/mL × 7.30 × 10^2 mL = 7.30 × 10^2 g

The initial heat content of the water can be calculated using the formula:

Heat content = mass × specific heat capacity × temperature change

Heat content = 7.30 × 10^2 g × 4.186 J/(g·K) × (25.0°C - 0.0°C) = 7.30 × 10^2 g × 4.186 J/(g·K) × 25.0°C

Next, we need to calculate the amount of heat that needs to be transferred from the water to the ice to lower the water temperature to 0.0°C. This heat transfer occurs during the melting of the ice.

The amount of heat required to melt the ice can be calculated using the formula:

Heat = mass of ice melted × latent heat of fusion

Let's assume that x grams of ice melts. The mass of the ice can be calculated using its density (0.92 g/mL) and volume (same as the volume of water):

Mass of ice = density × volume = 0.92 g/mL × 7.30 × 10^2 mL = 6.716 × 10^2 g

Heat = x g × 333.7 J/g

Now, we need to ensure that the heat transferred from the water to the ice is enough to lower the water temperature to 0.0°C. The heat transferred from the water to the ice is equal to the heat transferred from the water when its temperature drops to 0.0°C:

Heat content of water = Heat transferred to ice

7.30 × 10^2 g × 4.186 J/(g·K) × 25.0°C = x g × 333.7 J/g

Now, we can solve for x:

x = (7.30 × 10^2 g × 4.186 J/(g·K) × 25.0°C) / (333.7 J/g)

x ≈ 35.90 g

Therefore, approximately 35.90 grams of ice must melt to lower the water temperature to 0.0°C.

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The equilibrium constant expression for the given reaction is: Kc = [HOC1]2[HgCl2] / [Cl2]2.

In order to determine the equilibrium constant expression for the given reaction, it is important to know the relationship between the concentrations of reactants and products at equilibrium. For this, we use the law of mass action, which states that the product of the concentrations of the products raised to their stoichiometric coefficients divided by the product of the concentrations.

Reactants raised to their stoichiometric coefficients is equal to the equilibrium constant. This can be expressed mathematically as:Kc = [HOC1]2[HgO][HgCl2] / [HgO]2[Cl2]2[H2O]We can simplify the above expression by eliminating the concentration of water as it is in excess. Also, we know that the concentration of the solid is constant.

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Answer:

what type of language this is ??

The electrons present in the valence shell of an atom are responsible for the reactivity of atoms.

An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether solid,liquid , gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.

The protons are positively charged and neutrons are neutral and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.

Atoms of the same element are similar as they have number of sub- atomic particles which on combination do not alter the chemical properties of the substances.

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At normal temperature, aluminum interacts with weak hydrochloric acid. With hydrochloric acid, the metal dissolves, producing colorless hydrogen gas and aluminum chloride.

Although hydrogen is non-toxic, it can accumulate indoors in places like storage storage rooms and replace oxygen, leading to asphyxiation. By giving hydrogen fuel a manufactured smell and warning customers in the event of a leak, adding odorants can help mitigate this risk to some extent.

High-Temperature Water Splitting: Redox reactions that split water into hydrogen are fueled by high temps generated by light concentrators or nuclear reactors. Photobiological Water Splitting: When water is consumed by microbes like green algae in the presence of sunshine, hydrogen is produced as a byproduct.

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Reactant term is used to describe the substance that is totally consumed in a chemical reaction.

What are reactants?

Reactants are the substances that enter into and are used up in a chemical reaction. They are the starting materials that come together to form the products of the reaction. Reactants are found on the left side of the equation for a chemical reaction, and the products are found on the right side. Reactants are often referred to as substrates, as they are the substances from which the reaction builds the products. All chemical reactions involve the combining of at least two reactants, usually in the presence of a catalyst. Understanding the reactants involved in a reaction is essential to understanding the reaction itself.

Therefore, Reactant term is used to describe the substance that is totally consumed in a chemical reaction.

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Answer:

Explanation:

For amount of radiation from a hot body there is Stefan's Boltzman's law which is given below .

E = e σ T⁴

E is amount emitted , e is emissivity , σ is stefan's constant = 5.67 X 10⁻⁸ W / m² . for earth e =.85 approx

E = .85 x 5.67 X 10⁻⁸ x T⁴

604 = .85 x 5.67 X 10⁻⁸ x T⁴

604 = 4.82 x 10⁻⁸ T⁴

T⁴ = 125.31 x 10⁸

T =  3.3457 x 10²

= 334.57K

Temperature in Celsius = 334.57 - 273

= 61.57 Celsius .

Taking into account the reaction stoichiometry, 2 moles of CaO are required to react with 2 moles of Ca(OH)₂.

In first place, the balanced reaction is:

CaO + H₂O → Ca(OH)₂

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

The following rule of three can be applied: If by stoichiometric reaction 1 mole of Ca(OH)₂ is produced by 1 mole of CaO, 2 moles of Ca(OH)₂ are produced by how many moles of CaO?

\(moles of CaO=\frac{2 moles of Ca(OH)_{2}x1 mol of CaO }{1 mole of Ca(OH)_{2}}\)

moles of CaO= 2 moles

Finally, 2 moles of CaO are required to react with 2 moles of Ca(OH)₂.

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φ(g1 * g2) = eH = φ(g1) * φ(g2).

This completes the proof that φ: G → H is a group homomorphism.

By showing that the map φ preserves the group operation, we have demonstrated that it is a group homomorphism.

To prove that φ: G → H is a group homomorphism, we need to show that it preserves the group operation. In other words, for any two elements g1 and g2 in G, φ(g1 * g2) = φ(g1) * φ(g2), where * denotes the group operation in G, and * denotes the group operation in H.

Given that φ(g) = eH for all g ∈ G, where eH is the identity element in H, we can start the proof as follows:

Let g1, g2 ∈ G. We want to show that φ(g1 * g2) = φ(g1) * φ(g2).

Since φ(g) = eH for all g ∈ G, we have φ(g1) = eH and φ(g2) = eH.

Now, consider the product g1 * g2 in G. Applying φ to both sides, we have:

φ(g1 * g2) = φ(g1) * φ(g2).

Substituting the values of φ(g1) and φ(g2), we get:

φ(g1 * g2) = eH * eH.

Since eH is the identity element in H, the product eH * eH is simply eH.

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the energy required to melt 40.3 g of ice at 0 oC.The molar heat of fusion for ice is 6.02 kJ/mol. the energy required to melt 40.3 g of ice at 0 oC is 13.5 kJ.

The energy required to melt a substance is given by the formula:

q = nΔH_fus

where q is the heat absorbed or released during the phase change, n is the number of moles of the substance undergoing the phase change, and ΔH_fus is the molar heat of fusion of the substance.

To apply this formula to the melting of 40.3 g of ice at 0 oC, we first need to calculate the number of moles of ice present:

moles of ice = mass of ice / molar mass of ice

moles of ice = 40.3 g / 18.015 g/mol

moles of ice = 2.235 mol

Next, we can use the formula for q to calculate the energy required to melt the ice:

q = nΔH_fus

q = 2.235 mol × 6.02 kJ/mol

q = 13.5 kJ

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The mass percent of H in the sodium bicarbonate, NaHCO₃ is 1.20 %. The correct option is A.

The molar mass of the sodium bicarbonate, NaHCO₃  is as :

The Molar mass of NaHCO₃ = 1(Na) + 1(H) + 1(C) + 3(O)

The Molar mass of NaHCO₃ = 23.00 + 1.01 + 12.01 + (3 x 16.00)

The Molar mass of  NaHCO₃ = 84.01 g/mol

The mass percent H, in NaHCO₃ = (mass of H / mass of NaHCO3) x 100%

The mass percent H, in NaHCO₃ = (1.01 g / 84.01 g) x 100%

The mass percent H, in NaHCO₃ = 1.20%

The mass percent of the hydrogen, in the NaHCO₃ 1.20%. Therefore, the option A is correct.

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To prepare 128.2ml of a 0.364 M aqueous solution of NaCl.the mass in grams, of NaCl need to use to make the solution is 2.723 gm.

Molarity is defined as the no. of moles of solute per liter of solution.

Here,

Molarity =  moles of solute / Liter of solution

0.36 M solution will contains 0.364 moles of NaCl.

therefore, volume of solution in L =  ( 128.2 / 1000 ) L × 1 L

                                                 = 0.1282 L

that means, it will contain, no. of moles of NaCl

= (0.1282 L of solution × 0.364 ) / 1 L of solution      

= 0.0466 moles of NaCl

now, molar mass of NaCl  = 58.44 g/mol    

so, 1 mol of NaCl has a mass of  58.44 g/mol

therefore, 0.0466 moles of NaCl will have mass of

= ( 0.0466 moles of NaCl × 58.44 g ) / 1 mole of NaCl

= 2.723 g

Thus,To prepare 128.2ml of a 0.364 M aqueous solution of NaCl .the mass in grams, of NaCl need to use to make the solution is 2.723 gm.

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Answer:

a potential energy decreases, kinetic energy does not change b potential energy decreases, kinetic energy decreases c potential energy increases, kinetic energy does not change d potential energy decreases, kinetic energy increases e potential energy does not change, kinetic energy decreases f potential energy increases, kinetic energy decreases g potential energy increases, kinetic energy increases h potential energy does not change, kinetic energy increases

Explanation:

C2H2OH is the answer

I am not sure but I think

Answer:

See below.

Explanation:

A dynamic equilibrium in chemistry refers to a situation in which the reaction of reactants to form product(s) in which the products can reverse the reaction by falling apart and back to the reactants.  Reactions that go to completion are irreversible.  In cases where reactants form products (in a forward reaction), but the products can change back into reactants (in a reverse reaction) are called reversible.

An example is the reaction of carbon dioxide with water to form carbonic acid (think soft drinks).

     CO2(g)+H2O(l) ⇌ H2CO3(aq)

As anyone who has opened a warm can of soda knows, it can erupt suddenly and spray anyone nearby with a shower of bubbly, and sticky, soda.  Carbonic acid is unstable and will happily decompose back to it's reactant molecules if given the chance.

Experience tells us what to expect when giving a brother or sister a can of warm soda that you've shaken hard for a minute.  But if you are a chemist, such responses aren't always easy to predict with a new reaction.  Equilibrium constants were developed to provide a means for presdicting the exstent of these reactions.  They are used in equilibrium equations to predict the concentrations of products and reactants, given conditions of temperature and pressure, under defined conditions of temperature and pressure.

The equations themselves include concentrations as the key input.  In the carbonic acid example, if one were to add excessive amounts of one of the reactants, one would expect the equilibrium to "shift to the right."  This simply means that more carbonic acid would be made.  The chances of the forward reaction increase as concentration increases.  The amount of CO2 given off as a gas depends on the concentration of the CO2 in the gas phase, which is given by the partial pressure of the gas.

The space above the soda and the cap represents one place that the CO2(g) can escape the solution.  The CO2 pressure in the gas phase is a measure of it's concentration.  An equilbium calculation takes this concentration in account when decidng how much much of each component is present.  Other compouns that are present may also impact the equilibrium since they may interfere with one of the reaction steps.  Pressure and emperature either dirctly impact the concentration (e.g., gases) or they affect the "effective" concentrations of the compunds.  A higher temperature creates more collisons between reactant molucules that may change the equilibrium constant..

Answer:

1.2km=1,200,000! hope this helps

Answer:

Down is the recipe for momo..

Explanation:

recipe..

. Sieve the wheat flour carefully to remove lumps.

. Add water and knead the flour well to prepare a dough

. Remove the skin of the boiled potato ,cut into small pieces

. Heat the cooking oil in frying pan, and fry the pieces of onions cabbage green chili tomato pea etc.

. Prepare a mix veg stuffing by mixing potato other vegetables , green coriander and salt.

. Prepare a small balls of dough and roll it out of belna.

. Put 10 gm of mix vegetables stuff in the center of rolled dough and close it from all the sides to make a small ball.

. steam the momo for 10-15 minutes. After that it will be ready to serve.

. A sauce or pickle is usually eaten with momo.

Answer:

Explanation:

Sieve the wheat flour carefully to remove lumps.

Answer:

2 min 7 sec

Explanation:

According to the concept of solubility, the pH of saturated solution of calcium hydroxide is 9.

Solubility is defined as the ability of a substance which is basically solute to form a solution with another substance. There is an extent to which a substance is soluble in a particular solvent. This is generally measured as the concentration of a solute present in a saturated solution.

The solubility mainly depends on the composition of solute and solvent ,its pH and presence of other dissolved substance. It is also dependent on temperature and pressure which is maintained.Concept of solubility is not valid for chemical reactions which are irreversible. The dependency of solubility on various factors is due to interactions between the particles, molecule or ions.

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Answer:

uvo 8hih8hjfiuwubosbwbhp0heg

The molar mass of NaCl is 58.44 g/mol, and the molar mass of AgCl is 143.32 g/mol.

To find out how many grams of AgCl are produced from 78.00 g of NaCl, you can use stoichiometry and the balanced chemical equation for the reaction:

2 NaCl + AgNO3 → 2 NaNO3 + AgCl

From this equation, you can see that 2 moles of NaCl react with 1 mole of AgNO3 to produce 2 moles of NaNO3 and 1 mole of AgCl. Therefore, the mole ratio of NaCl to AgCl is 2:1.

To calculate the number of moles of NaCl in 78.00 g, you can divide the mass by the molar mass.

Mass is a fundamental physical quantity that measures the amount of matter in an object. It is commonly expressed in units such as grams (g) or kilograms (kg). The mass of an object is always constant, regardless of its location or the gravitational force acting on it. Mass is different from weight, which is the force exerted on an object due to gravity, and can vary with the strength of the gravitational field. The concept of mass is important in physics and other sciences, as it plays a fundamental role in determining the behavior of objects under various conditions, including acceleration, momentum, and energy.

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In the given reaction one mole or 143.32 g of silver chloride will be produced.

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To prove that oxygen is produced during photosynthesis, the following steps must be performed:

Place aquatic plants in a beaker of pond water.

Cover plants with short-stem funnels.

Invert the test tube filled with water to cover the stem of the funnel. Make sure the water level in the beaker is above the height of the funnel when inserting the

test tube.

Expose the device to sunlight.

After several hours, air bubbles form and collect in the test tube.

test the gas in the test tube.

Glowing debris bursts into flames, indicating the presence of oxygen.

Observation: Gas bubbles are seen in the test tube.

Result: Oxygen is produced

Conclusion: Gas bubbles are formed which prove that oxygen is produced by the green plants during photosynthesis

What is photosynthesis ?

Photosynthesis is the process that plants and other organisms use to convert light energy into chemical energy, which is later released through cellular respiration to power the activity of the organism. Some of this chemical energy is stored in carbohydrate molecules such as sugars and starches synthesized from carbon dioxide and water. Hence, photosynthesis is named 'light' and synthesis is named 'assemble'. Most plants, algae, and cyanobacteria perform photosynthesis. Such organisms are called photoautotrophs. Photosynthesis is largely responsible for the production and maintenance of the oxygen content of the Earth's atmosphere and provides most of the energy needed for life on Earth.

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The overall energy change is 3065.4 KJ/mol.

To calculate the overall energy change in kilojoules per mole for the formation of CaCl2(s) from the elements, we can use the Born-Haber cycle. The steps involved are:

1. Sublimation of Ca(s) to Ca(g): +178.2 kJ/mol
2. Bond dissociation of Cl(g) to 2 Cl(g): +243 kJ/mol
3. Ionization of Ca(g) to Ca+(g): +589.8 kJ/mol
4. Ionization of Ca+(g) to Ca2+(g): +1145 kJ/mol
5. Electron affinity of Cl(g) to Cl-(g): -348.6 kJ/mol
6. Lattice energy for CaCl2(s): +2258 kJ/mol

To find the overall energy change, we add the energy changes from steps 1-6:

Overall energy change = (+178.2) + (+243) + (+589.8) + (+1145) + (-348.6) + (+2258) = 3065.4 kJ/mol

The lattice energy for CaCl(s) is estimated to be +717 kJ/mol. Comparing the lattice energy for CaCl(s) and CaCl2(s), we can conclude that \(CaCl_{2}\)(s) is more likely to form since it has a higher lattice energy, which indicates a more stable compound.

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To clean powder fouling, corrosion, and dirt from outside parts of the lower receiver and extension assembly, one should use the best quality cleaning materials and methods.

Powder fouling, corrosion, and dirt can accumulate on the outside parts of the lower receiver and extension assembly, making it hard to maintain the rifle. It is essential to clean the weapon regularly to maintain its efficiency and longevity.

The following cleaning materials are required for the cleaning process:

Cleaning solvent

Cleaning brush

Microfiber cloth

Lubricant

The best solvent to use when cleaning the rifle is a powder solvent. This is because it is specifically designed to remove fouling from firearms. It is also essential to use a cleaning brush made of brass, nylon, or synthetic material to avoid damaging the parts of the lower receiver and extension assembly.

Brass brushes are best for removing fouling, while nylon and synthetic brushes are gentle on the metal parts and help prevent corrosion. Avoid using a steel brush when cleaning the rifle since it may scratch or damage the surface of the metal.Lubricant is also essential in maintaining the rifle. It helps keep the moving parts smooth and minimizes friction between metal parts.

A high-quality lubricant should be used, and the excess should be wiped off with a microfiber cloth. To clean the weapon, apply the cleaning solvent onto the brush and scrub the outside parts of the lower receiver and extension assembly, then wipe it off with a microfiber cloth. Ensure the surface of the metal parts is dry before applying lubricant. Apply lubricant to moving parts of the weapon.

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Answer:

Their isn't your examples but I will give you mine

Freezing, Evaporation and so on.