the vessel in which electrolysis takes place is called


PLEASE GUYS ANSWER IT

Answer:

D

Explanation:

Answer:

(1) conversion of mass to energy

Explanation:

Nuclear fission: In nuclear fission, an unstable atom splits into two or more smaller pieces that are more stable, and releases energy in the process. The fission process also releases extra neutrons, which can then split additional atoms, resulting in a chain reaction that releases a lot of energy.

The primary result of a nuclear fission reaction is the conversion of energy to mass.

Hence, option 2 is the answer.

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To Find :

How many moles of air are there in a 125 mL Erlenmeyer flask if the pressure is 755  mm Hg and the temperature is 20.0°C .

Solution :

Since, air contains different gas in different proportion.

Its average molar mass is considered to be 29 gram/mol .

Now, we know by ideal gas equation :

\(PV = nRT\\\\n = \dfrac{PV}{RT}\)

Here, R is ideal gas equation, \(R = 62.363\ mm\ Hg\ L \ mol^{-1} \ K^{-1}\)

Putting all given values we get :

\(n = \dfrac{755 \times 0.125}{62.363\times (20+273)}\ moles\\\\n = 0.00516 \ moles\)

Hence, this is the required solution.

1. Apple juice has a pH of around 3 and lemon juice has a pH near 2. to neutralize with baking soda lemon juice would need more baking soda because it is more acidic than aple juice. the less  ph present the more baking soda need to neutralize.

2. A "mole" is the quantity of a material that is precisely 6.02214076 X 1023 particles in the International System of Units. Ions, atoms, or molecules might make up the particles.

The number of moles of a solute in a litre of solution is known as molarity (M). The symbol for molarity is M, which stands for mole/liter.

Molarity is a measure of a solution's concentration that is expressed in units of moles per litre. Therefore, molarity is utilised to calculate the solute's volume.

3 Hexane will  dissolve in  ionic salt like LiCl because both of the compound are covalent and non-polar and like dissolves like.

4.Every enzyme has a preferred pH range. Outside of this range, pH changes will limit enzyme activity. Enzymes can denature at extreme pH levels. If there is a substrate available for the enzyme to bind to, increasing the concentration of the enzyme will hasten the process.

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The closest to the partial pressure of O₂ after the system has reached equilibrium is 0.5 atm, because K is very large, nearly all the SO₂ is consumed before the system reaches equilibrium, but an excess amount of O₂  remains at equilibrium. the correct answer is B.

Chemical equilibrium is the condition in which the concentrations of the reactants and products are equal and have no further tendency to fluctuate over time, with no discernible change in the features of the system.

The equilibrium moves to the side of the reaction where there are less moles of gas as the pressure increases. When the pressure decreases, the equilibrium moves to favor the reaction that produces more gas molecules.

Partial pressure is inversely proportional to volume, according to the ideal gas law. Additionally, it correlates with both the temperature and the amount of moles.

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✅Paraphrasing and summarizing .✅

IamSugarBee

Based on Brenda's notes, some elements can react to form basic compounds. The table she uses for her notes likely contains information on the properties of these elements.

To understand her notes better, we would need more information about the specific elements and their properties mentioned in the table. Without more details, it is difficult to provide a comprehensive answer. However, based on the given information, we can conclude that Brenda's notes suggest the existence of elements that can undergo chemical reactions to form basic compounds.

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Answer:

Some of the energy released in respiration is used to make larger molecules from smaller ones, to enable muscles to contract and to keep temperature steady. Some of the energy released in respiration in plants is used to make amino acids and proteins. c Food provides the amino acids needed to make body proteins.

Explanation:

The substance that is the oxidizing agent in the reaction is E.\(PbO2\)

A chemical species known as an oxidizing agent has a propensity to oxidise other compounds. This indicates that it causes a material to become more oxidised by causing it to lose electrons. Normal oxidising agents live in their most oxidized forms and have a significant propensity to pick up electrons and proceed through reduction. Strongly electron-affine ions, atoms, and molecules are regarded as effective oxidizers. The power of oxidation increases with increasing electron affinity.

Pb is the chemical that undergoes a reduction in the process, changing its oxidation state from 0 to +2 in the formation of \(PbSO4\). The oxidising agent is the chemical that results in the reduction of Pb. \(PbO2\) serves as the oxidising agent in this situation because it contributes oxygen atoms to the oxidation process.

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When atoms form chemical bonding then the atoms attain Noble gas configuration.

Noble gas configuration of an atom includes the fundamental image of the ultimate noble fueloline previous to that atom, observed via way of means of the configuration of the ultimate electrons.so for sodium, we make the substitution of [Ne] for the 1s22s22p6 a part of the configuration. Sodium's noble fueloline configuration becomes [Ne]3s1.

Covalent bonds, atoms percentage pairs of electrons, at the same time as in ionic bonds, electrons are absolutely transferred among atoms in order that ions are formed.During the formation of a chemical bond, the predicted end result is that the electrons will whole a noble fueloline configuration in each atoms. Typically, while atoms shape a chemical bond, the predicted end result is that the electrons.

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The principle of option D. Uniformitarianism states that the physical, chemical, and biological processes at work shaping the Earth today have also operated in the

Option D. Uniformitarianism is the principle stating that the physical, chemical, and biological processes at work shaping the Earth today have also operated in the geologic past. It is based on the idea that the present is the key to the past. In other words, the same natural laws that operate in the universe today have been operating since the beginning of time.

James Hutton was the first to propose this principle in the late 18th century. He suggested that the Earth was shaped by slow-acting geological forces such as erosion, sedimentation, and uplift over long periods of time. He believed that the same processes were still happening today and that they had operated in the past.

This principle is an important concept in geology because it allows scientists to interpret the Earth's history based on the processes that they observe today. By understanding how these processes work and how they have changed over time, scientists can reconstruct the history of the Earth and its environments.

Uniformitarianism has been tested and proven through many observations and experiments. For example, the study of sedimentary rocks has shown that they were formed in the past through the same processes that are observed today, such as deposition of sediment by water, wind, or ice.

Similarly, the study of volcanoes has shown that they are formed by the same processes as today, such as the movement of magma from deep within the Earth.

In conclusion, Uniformitarianism is the principle that allows us to interpret the Earth's history by observing the processes that shape it today. It is a fundamental concept in geology and has been tested and proven through many observations and experiments.

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There are two types of reactions, they are exothermic and endothermic. In endothermic reaction, Energy is absorbed by the reaction. The correct option is C.

The chemical reactions which proceed with the absorption of heat energy are defined as the endothermic reactions. In this reaction, system gains heat and hence the enthalpy change is found to be positive.

In endothermic reactions, since heat energy is absorbed, the enthalpy of the products will be more than that of the reactants. In exothermic reactions, system loses heat to the surroundings and hence the enthalpy change is negative.

The endothermic reactions can lower the temperature of their surrounding area and thereby creates a cooling effect. As a result of this reaction the entropy of the surroundings decreases. Melting of ice is an example of endothermic reaction.

Thus the correct option is C.

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Answer:  

A: cold, cyclonic wind

B: deep ocean water

C: cold ocean water

E: warm ocean water

F: a strong cold front​

You only need A, B, C, E, F not D because that for tornadoes buddy.

Among the options listed, frost wedging is not directly related to chemical weathering.

Frost wedging is a physical weathering process that occurs in cold climates where water seeps into cracks in rocks, freezes, and expands, exerting pressure on the surrounding rock.

This expansion can cause the rock to break apart over time. While frost wedging does involve the action of water, it does not involve chemical reactions.

On the other hand, the remaining options—hydrolysis, oxidation, and decomposition—are all forms of chemical weathering. Hydrolysis is a chemical reaction where water molecules react with minerals in rocks, leading to their breakdown or alteration.

Oxidation occurs when oxygen reacts with certain minerals, such as iron, in rocks, resulting in their rusting or decomposition. Decomposition, also known as biological weathering, involves the breakdown of rocks through the actions of living organisms, such as lichens and plant roots.

Chemical weathering processes, including hydrolysis, oxidation, and decomposition, can alter the chemical composition and structure of rocks over time.

These processes play significant roles in shaping Earth's surface by breaking down and transforming various rock types.

Frost wedging, although a powerful physical weathering process, is not classified as a chemical process as it does not involve chemical reactions or changes in the mineral composition of rocks.

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Avocados and tomatoes were mainly eaten by the Aztecs and Maya.

"Mayans cooking method includes digging a shallow pit, lining it with stones or clay balls.

Avocados and tomatoes were mainly eaten by the Aztecs and Maya, with different types of fruit. Corn was made into a kind of porridge, called atole in Mesoamerica and capita in Inca territory.

Avocados and tomatoes were mainly eaten by the Aztecs and Maya.

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Option A: It is the amount of energy stored in the intermolecular attractions that hold particles together in an ionic solid, and option C: it is the amount of enthalpy change that occurs when 1mol of ionic solid is converted into gaseous ions, describes lattice energy.

The enthalpy change required to convert one mole of an ionic solid into gaseous ionic components is known as lattice energy. The strength of the ionic bonds in an ionic compound is gauged by lattice energy. It holds the particles together in a molecule. Thus, option A and C describes lattice energy. It sheds light on a number of ionic solids' characteristics, such as their solubility, hardness, and volatility.

The lattice energy of an ionic solid cannot be measured directly, but only be detected with Born-Haber cycle. It is expressed in terms of kilo-joule per mole, KJ/mol.

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The overall reaction for the oxidation of SO2 by O2 to give SO3 is:

SO2(g) + O2(g) ⟶ 2SO3(g)

The two given reactions are:

NO2(g) + SO2(g) ⟶ NO(g) + SO3(g)

2NO(g) + O2(g) ⟶ 2NO2(g)

Adding these reactions, we get:

NO2(g) + SO2(g) ⟶ NO(g) + SO3(g)

2NO(g) + O2(g) ⟶ 2NO2(g)

2NO2(g) + SO2(g) + O2(g) ⟶ 2NO(g) + 2SO3(g)

Therefore, the overall reaction for the oxidation of SO2 by O2 to give SO3 is:

SO2(g) + O2(g) ⟶ 2SO3(g)

where the catalyst NO2 is not explicitly shown. All the reactants and products are in the gas phase.

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Answer:

C

Explanation:

You can use process of elimination to get your answer.

A & D would be advantages of using celcius thermometers so they are eliminated.

B can be useful if you need to know what temperature water boils at, making it an advantage so it is eliminated.

This leaves C, the only option choice that sounds like a disadvantage. This is seen as it explains how the mercury inside could harm the user if the thermometer.

Answer:

+91.7 KJmol-1

Explanation:

Recall that ∆G= -RTlnK

Since ∆G in this case is ∆Grxn and K is the Ksp

Note that the Ksp is the solubility product (as shown by the reaction equation)

∆Grxn is the change in free energy for the reaction, in this case the ionization of the silver iodide into silver and iodide ions.

R= 8.314JK-1 and T =25°C +273 = 298 K (the centigrade temperature must be appropriately converted to its corresponding absolute absolute before proceeding with the calculation)

Hence we can substitute values accordingly;

∆Grxn = -(8.314 × 298 × ln 8.3×10^-17)

∆Grxn = +91.7 KJmol-1

the nurse will administer approximately 1 teaspoon (tsp) of the medication.1 teaspoon (tsp) is approximately equal to 5 mL.

To determine the number of teaspoons the nurse should administer, we need to calculate the equivalent volume of 30 mEq of KCL using the provided concentration of 60 mEq/10 mL.

First, we'll find the ratio of milliequivalents (mEq) to milliliters (mL) in the given concentration:

60 mEq / 10 mL = 6 mEq/mL

Next, we can set up a proportion to find the volume (in mL) that corresponds to 30 mEq:

6 mEq/mL = 30 mEq / X mL

To solve for X, we can cross-multiply:

6X = 30 * 1

6X = 30

X = 30 / 6

X = 5 mL

Since the medication cup is marked in teaspoons, we need to convert 5 mL to teaspoons.

1 teaspoon (tsp) is approximately equal to 5 mL.

Therefore, the nurse will administer approximately 1 teaspoon (tsp) of the medication.

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Based on the values of bond energies given, the reaction is endothermic and absorbs 20 kJ of heat when 2 moles of acetylene reacts.

The equation of the combustion of acetylene sis given below:

2 C2H2 + 5 O2 -----> 4 CO2 + 2 H2O

Sum of ΔH bonds broken:

2 × C≡C + 2(2 × C—H) = 2 × 839 + 4 × 413 = 3330 kJ

5 × (2 × O = O) = 10 × 495 = 4950 kJ

Sum of ΔH bonds broken = 8280 kJ

Sum of ΔH of bonds formed:

Energy of C=O is 799 kJ

4 × 2 × C=O = 8 × 799 = 6392 kJ

Energy of H-O bond is 467kJ

2 × 2 × H-O = 2 × 2 × 467 = 1868 kJ

Sum of ΔH of bonds formed = 8260 kJ

Heat change, ΔH = 8280 -8260 kJ

Heat change, ΔH = 20 kJ

Therefore, based on the bond energies given, the reaction is endothermic and absorbs 20 kJ of heat when 2 moles of acetylene reacts.

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Answer:

In a physical change the appearance or form of the matter changes but the kind of matter in the substance does not. However in a chemical change, the kind of matter changes and at least one new substance with new properties is formed.

Answer:

Bases

Explanation:

Most soaps fall under the base category as they are slippery and will taste bitter if you taste it (DONT TRY IT THO).

NaNO3 has a solubility of 80 grams per 100 grams of water at 10oC. (It seems to be somewhat less than 80 grams, but after rounded off, it's practically 80 grams.)

• Assume we just required 60 mL of NaNO3 solution at 10oC. Further Information: Because the solubility of solids rises with temperature, solutes whose curves go higher with increasing temperature are often solids.

Thus the solution in issue is saturated, or even somewhat supersaturated — but you're probably correct.

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Answer:

BBBBBBBBBBBBBBBBBBBBBBBBBB

We need 128.04 grams of Al2(SO4)3.18H2O to make 800 mL of a 0.300 M solution. Given that the volume of the solution (V) = 800 mL = 0.8 L

The molarity of the solution (M) = 0.300 M

We have to find out the mass of the compound Al2(SO4)3.18H2O required to make the solution.

To find the mass, we need to use the formula:

mass = molarity x molar mass x volume

Here, the molar mass of Al2(SO4)3.18

H2O = 666.39 g/mol (sum of the atomic weights of Al, S, O, and H)

Let the mass of the compound be x grams. Substituting the given values in the above formula:

mass = 0.300 x 666.39 x 0.8

= 160.05 x 0.8

= 128.04 g

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If a sound wave refracts,It changes its speed and wavelength when it bounces off of a solid surface,It changes its speed and wavelength when it passes through an opening, and It changes direction when it passes from one medium to another. Therefore, option A, C and D are correct.

An important case in which sound waves change form or spread out is called refraction. This phenomenon affects the bending of a sound wave owing to changes in the wave's speed.

Refraction is the reason ocean waves near a shore parallel to the beach and why glass lenses can be used to focus light waves.

If the air above the earth is warmed than that at the surface, sound will be change shape back downward toward the surface by refraction. Sound propagates in all directions from a point source.

Thus, option A, C and D are correct.

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