7. How many total atoms are present on the reactant side of the equation?
A. 3
B. 6
C. 7
D. 13

The mass of the percent of the 10 g solute in the 105 g solvent is 8.69 %.

The mass of the solute = 10 g

The mass of the solvent = 105 g

The mass of the solution = 10 g + 105 g

The mass of the solution = 115 g

The mass of the percent is expressed as :

The mass of percent = ( mass of solute / mass of solution ) × 100 %

The mass of solute = 10 g

The mass of solution = 115 g

The mass of percent = ( 10 / 115 ) × 100 %

The mass of percent = 8.69 %

Thus, the mass of percent is 8.69 % and the mass of solute is 10 and the mass of the solution is 115 g.

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The correct options that will result in mole are option B, C, and H

To know the options that will result in mole, do the following:

Ideal gas law states as follow:

PV = nRT

Where

PV = nRT

Make n the subject by dividing both sides by RT

n = PV / RT (option B)

Mole, mass and molar mass are related according to the following formula:

Mole = mass / molar mass (option C)

Molarity is defined as mole per unit volume as shown below:

Molarity = mole / volume

Make mole the subject by cross multiplying.

Mole = Molarity × volume (option H)

Thus, from the above illustrations, we can conclude that the correct options which will result in mole are option B, C, and H

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If the density of antifreeze solution is 1.07 g/mL, then the molarity of the antifreeze solution is calculated as 8.66 M.

Number of moles of solute dissolved per liter of the solution is defined as molarity.

As we know, moles of EG = mass of EG / molar mass of EG

Mass of EG = 47.0 mL × 1.11 g/mL = 52.17 g

Moles of EG = 52.17 g / 62.07 g/mol = 0.840 mol

Total volume = 47.0 mL + 50.0 mL = 97.0 mL

So, mass of solution = volume of solution × density of solution

mass of solution = 97.0 mL × 1.07 g/mL = 103.79 g

As, molarity =moles of solute /volume of solution

Molarity = 0.840 mol / (97.0 mL / 1000 mL/L) = 8.66 M

Therefore, the molarity of the antifreeze solution is 8.66 M.

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Answer:

Sugar

Explanation:

Glucose is a carbohydrate. Carbohydrates are mainly used for quick energy inside cells, but they also play an important role in cell structure and communication. Carbohydrates are macromolecules called polysaccharides, meaning they are made of many sugars.

Answer:

The student who models the sun should stand somewhere in the room between Earth and the stars. The exact location will depend on how the students have chosen to set up the model and the relative distances they have assigned to each object. However, a common location for the sun model in this type of model is near one of the walls of the room, at a distance that is proportionally farther away from Earth than the stars. This is because the sun is much larger than any other object in our solar system and is located at the center of it, while the stars are much farther away. The student who models the sun should also be holding a flashlight, as the sun is a source of light and heat for our planet and the other planets in our solar system.

Answer: very close to Earth.

Explanation: I took the test the 2nd answer" to Question

The sun releases a huge amount of energy.

About what fraction of this energy reaches Earth? "

is :

one-billionth

The enthalpy for the following reaction Ca (s) + 2 H₂O → Ca(OH)₂(s) + H₂ (g) is -365kJ.

A thermodynamic system's enthalpy, which is one of its properties, is calculated by adding the system's internal energy to the product of its pressure and volume. It is a state function that is frequently employed in measurements of chemical, biological, and physical systems at constant pressure, which the sizable surrounding environment conveniently provides. The pressure-volume concept describes the effort needed to create space for the system by displacing its surrounds in order to determine its physical dimensions.For solids and liquids under typical conditions, the pressure-volume term is relatively tiny, whereas it is only somewhat small for gases. As a result, in chemical systems, enthalpy serves as a stand-in for energy; for example, in chemistry, "energies" like bond, lattice, and solvation are actually differences in enthalpy.

The enthalpy for the reaction Ca (s) + 2 H₂O (1) -> Ca(OH)₂ (s) + H₂ (g) is -365 kJ. This can be calculated by using the calculated enthalpy values of the three given reactions above and the law of Hess's.

First, let's look at the given reactions:

2 H₂ (g) + O₂ (g) → 2 H₂0

ΔH° = -572 kJ

Ca (s) + ½ O₂ (g) →CaO (s)

ΔH° = -635 kJ

CaO (s) + H2O → Ca(OH)₂ (s)

ΔH° = -64 kJ

Now let's calculate the enthalpy for the reaction Ca (s) + 2 H2O (1) -> Ca(OH)₂ (s) + H₂ (g):

ΔH° = [2(-64 kJ) + (-572 kJ) + (-635 kJ)] - (-572 kJ + (-64 kJ + (-635 kJ))

ΔH° = -365 kJ

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The number of moles of HCl present in 250. mL of 1.0 M HCl is 0.250 moles.

The number of moles of a substance can be calculated using the following expression;

Molarity = no of moles ÷ volume

According to this question, we were given 250. mL of 1.0 M HCl. The number of moles can be calculated as follows;

no of moles of HCl = 0.250L × 1.0M

no of moles of HCl = 0.250 moles

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Answer: .25

Explanation:

Rhenium oxide is a chemical compound composed of rhenium and oxygen atoms. Its chemical formula is ReO3, and it is a black or dark gray solid with a crystalline structure. Rhenium oxide is a highly refractory material with a very high melting point and excellent thermal stability, which makes it useful in high-temperature applications such as furnace linings and electrical contacts. It is also used as a catalyst in various chemical reactions, including the production of synthetic ammonia and in the dehydrogenation of alcohols. Rhenium oxide is a relatively rare material and is generally produced as a byproduct of other mining and refining processes. It has a number of unique properties that make it valuable in a variety of industrial and scientific applications.

Which of these is more likely to be a gas at room temperature?

Sodium chloride (NaCl), lithium peroxide (LiO₂), and calcium phosphide (Ca₃P₂) are all ionic compounds that have high melting and boiling points due to the strong electrostatic forces of attraction between their ions. At room temperature, NaCl and LiO₂ are solids, and Ca₃P₂ is a grey metallic solid.

In contrast, SO₂ is a molecular compound that consists of molecules made up of one sulfur atom and two oxygen atoms. The electronegativity difference between sulfur and oxygen causes a polar covalent bond between them. SO₂ molecules are held together by weak intermolecular forces of attraction such as van der Waals forces. Thus, SO₂ exists as a gas at room temperature and atmospheric pressure.

- A gas is one of the four fundamental states of matter which is composed of molecules or atoms that are in constant random motion. Gas takes up a larger amount of space than solids or liquids because it has less intermolecular attraction between its particles.

Gases are usually compressible and can fill any container they occupy. The properties of a gas can be explained by the Kinetic Molecular Theory which describes that gas particles are in constant motion, collide with each other and with the walls of the container they are in, and that their motion is random and determined by temperature, pressure and volume.

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- Temperature is a measure of the degree of hotness or coldness of an object or a substance relative to another. In physics, it is defined as the average kinetic energy of particles (such as atoms, molecules, or ions) in a system. The SI unit of temperature is Kelvin (K), but other common units of temperature include Celsius (°C) and Fahrenheit (°F).

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Explanation:

Each liter of this solution has .15 moles

.075 Liter  will have   .075 liter * .15 mole/liter = .01125 moles

                                                                 (round as needed)

To calculate the moles of HCl in 75.0mL of a 0.150M solution, first, convert the volume to liters (0.075L). Then, multiply the molarity by the volume in liters to get the moles. Therefore, there are 0.01125 moles of HCl in the solution.

To find out how many moles of HCl are there in 75.0 mL of 0.150 M HCl, you need to understand the concept of molarity. Molarity (M) is defined as the number of moles of solute per liter of solution. Since molarity is expressed in moles/L, to calculate moles we use the formula: moles = Molarity x Volume(L).

First, convert 75.0mL to Liters by dividing by 1000 to get 0.075L.

Then multiply this volume by the molarity to calculate the moles:

0.150M x 0.075L = 0.01125 moles of HCl.

So, there are 0.01125 moles of HCl in 75.0 mL of 0.150 M HCl solution.

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There are approximately 3.59 x [tex]10^{25}[/tex] molecules of [tex]CO_{2}[/tex] in 59.7 moles of [tex]CO_{2}[/tex].

What is Molecules?

Molecules are the smallest units of a chemical compound that retain the chemical properties and characteristics of that compound. They are composed of two or more atoms chemically bonded together. Molecules can be made up of atoms of the same element (as in diatomic molecules like oxygen gas, [tex]O_{2}[/tex]) or different elements (as in water,[tex]H_{2}O[/tex]which consists of two hydrogen atoms and one oxygen atom).

The term "59.7 molecules of [tex]CO_{2}[/tex]" is not a meaningful unit, as molecules are discrete entities and cannot be divided into fractions. However, assuming you meant to ask for the number of molecules in 59.7 moles of [tex]CO_{2}[/tex], we can use Avogadro's number to calculate it.

Avogadro's number is approximately 6.022 x [tex]10^{23}[/tex]molecules/mol, and it represents the number of entities (such as atoms, ions, or molecules) in one mole of a substance.

Given that you have 59.7 moles of [tex]CO_{2}[/tex], we can multiply this value by Avogadro's number to obtain the total number of molecules:

59.7 moles [tex]CO_{2}[/tex] x 6.022 x [tex]10^{23}[/tex] molecules/mol ≈ 3.59 x [tex]10^{25}[/tex] molecules of [tex]CO_{2}[/tex]

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According to the question, there are 5.857 x 10¹¹ molecules of C₁₂H₂₂O₁₁ in 205g of sucrose.

Molecules are the building blocks of all matter. They are composed of one or more atoms that are held together by covalent bonds, which are formed when electrons are shared between atoms. Molecules can exist as individual entities, but they often combine with other molecules to form larger structures, such as proteins, carbohydrates, and lipids. Molecules can also be found in all living things, from the smallest bacteria to the largest mammals.

This is calculated by taking the molecular weight of sucrose (342.34 g/mol) and dividing it by 205, the mass of the sucrose. This yields a ratio of 1 mol sucrose/ 1.6943 g sucrose. Multiplying this ratio by 205 yields 342.34 mol sucrose, which when multiplied by Avogadro's Number (6.022 x 10²³ mol) yields 5.857 x 10¹¹ molecules of C₁₂H₂₂O₁₁.

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Please note that the actual pH values and corresponding labels may vary depending on the specific pH range of the acids and bases you are using in your experiment.

What is pH?

pH is a measure of the acidity or basicity of a solution. It is a scale that ranges from 0 to 14, with 7 being considered neutral. A pH value less than 7 indicates acidity, with lower values indicating higher acidity. A pH value greater than 7 indicates basicity, with higher values indicating higher basicity.

pH is a measure of the concentration of hydrogen ions (H+) in a solution. A lower pH value indicates a higher concentration of H+ ions, which makes the solution more acidic.

It's important to measure and record the actual pH values of the solutions in the test tubes to accurately determine their acidity or basicity.

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The acids and bases shown right cover a range of pH values. Use

what you know about acids, bases, and concentration to label the

test tubes, in order, from most acidic to most basic.

The data collected by Leah and Paul supports Paul's opinion that matter can exist even when it is not visible.

Support is a term used to describe a range of services and resources offered to individuals in need. It can refer to providing help with practical tasks, such as helping someone to manage their finances or providing transport to medical appointments. It can also refer to providing emotional or social support. This could involve providing counselling or having regular conversations to help someone to feel understood and supported. Support can also refer to offering advice and guidance, or providing a safe space for someone to talk and express their feelings. In its broadest sense, support is about helping someone to have the best quality of life they can.

This is because the mass of the inflated bag is greater than the mass of the empty bag despite the fact that the volume of the inflated bag is much greater. This shows that the inflated bag contains air, which is matter, even though it cannot be seen.

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The pressure in the vessel is 3.76 atm.

To find the pressure in the vessel, we can use the ideal gas law, which states:

PV = nRT

where P is the pressure, V is the volume, n is the number of moles of gas, R is the gas constant, and T is the temperature in Kelvin.

First, we need to calculate the total number of moles of gas in the vessel:

n(total) = n(N₂) + n(H₂) + n(Ar)

We can find the number of moles of each gas using the formula:

n = m/M

where m is the mass of the gas and M is the molar mass of the gas.

n(N₂) = 2.80 g / 28.01 g/mol = 0.0999 mol

n(H₂) = 0.807 g / 2.02 g/mol = 0.400 mol

n(Ar) = 79.9 g / 39.95 g/mol = 2.00 mol

n(total) = 0.0999 mol + 0.400 mol + 2.00 mol = 2.50 mol

Next, we can convert the temperature from Celsius to Kelvin:

T = 25°C + 273.15 = 298.15 K

Finally, we can plug in the values into the ideal gas law:

PV = nRT

P(18.9 L) = (2.50 mol)(0.08206 L·atm/mol·K)(298.15 K)

P = (2.50 mol)(0.08206 L·atm/mol·K)(298.15 K) / (18.9 L)

P = 3.76 atm

Therefore, the pressure in the vessel is 3.76 atm.

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When thermal energy is being removed from a liquid and it starts to freeze, the temperature of the liquid will remains constant until all the liquid has frozen. This happens because the energy that is being removed is being used to break the bonds between the molecules in the liquid and to form a solid.

Once all the intermolecular bonds have been broken and the liquid has fully solidified, the temperature of the solid will continue to decrease with further cooling.

This process is known as latent heat of fusion, which is the amount of energy required to change a substance from a liquid to a solid state , without any change in temperature.

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The compound NH4Cl or ammonium chloride is composed of two ions: ammonium ion (NH4+) and chloride ion (Cl-). The ammonium ion is a polyatomic cation made up of one nitrogen atom and four hydrogen atoms, while the chloride ion is a monatomic anion made up of one chlorine atom.

The Kc of the system is  8.9.

The equilibrium constant of a chemical reaction in terms of concentrations is referred to as Kc in chemistry. The equilibrium constant, or Kc, is a gauge of how far a chemical reaction has advanced toward equilibrium.

We have that from the information in the question;

[CO] = 1 mole/13 L = 0.077 M

[H2O] = 1 mole/13 L = 0.077 M

[CO2 ] = 0.692 mol/13 L = 0.053 M

[H2] = 1 M

Then we would have that;

[CO2 ] [H2] /[CO][H2O]

Kc =  0.053/( 0.077 )^2

= 8.9

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Answer: Mg2⁺(g) + Se2⁻(g) → MgSe(s)

Explanation: This response includes the arrangement of one mole of MgSe(s) from its constituent vaporous particles, and the discharge of cross section vitality. The other responses recorded don't include the arrangement of MgSe from its constituent particles within the gas stage, so they are not related with the grid vitality of MgSe.

The amount of caffeine in a 16 fl oz can of Monster's Energy Drink is roughly 160 mg, which is regarded as a moderate dose. Caffeinated than the typical coffee drink, which has between 95 and 200 mg per serving.

How so much caffeine is there in a complete can of Monster. Each 16-ounce can of Monster Energy has a whooping 160 mg of caffeine, more than double the amount in an 8-ounce Red Bull can and up to than double amount commonly encountered in an average coffee drink.

What Much of Coffee Is Recommended. Caffeine does not have negative effects on healthy adults when used in moderation, like many other meals, according to Karolin. 300 mg or less per day, or roughly three 8-ounce cups of coffee, is considered a moderate quantity.

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Answer:

1.81 micromol/L.

Explanation:

The concentration of a solution is calculated by dividing the amount of solute by the volume of the solution. In this case, the amount of calcium sulfate is 0.181 micromol and the volume of the solution is 100 mL. So, the concentration of calcium sulfate in the solution is (0.181 micro mol) / (100 mL) = **1.81 micro mol/L

its e00 molew then asg hol

The atoms of neon are [tex]27.099 *10^{23}[/tex], moles of silicon are 0.1199 , moles of [tex]CH_{4}[/tex] are 0.56, moles of gold are 8.64, atoms of cobalt are [tex]157.7764*10^{23}[/tex] and number of cookies are    [tex]7.2264*10^{23}[/tex].

Multiplying the number of moles with [tex]6.022*10^{23}[/tex] we will get number of atoms of neon.

Number of atoms= [tex]4.5* 6.022 *10^{23}[/tex]

Number of atoms of neon =  [tex]27.099 *10^{23}[/tex]

Number of atoms= moles * [tex]6.022*10^{23}[/tex]

Moles of silicon =  [tex]\frac{1.2*10^{23}}{6.022*10^{23} }[/tex]

Moles of silicon = 0.199 moles

Number of atoms= moles * [tex]6.022*10^{23}[/tex]

Moles of [tex]CH_{4}[/tex] = [tex]\frac{3.4*10^{23} }{6.022*10^{23} }[/tex]

Moles of [tex]CH_{4}[/tex]= 0.56 moles

Number of atoms= moles * [tex]6.022*10^{23}[/tex]

Moles of gold = [tex]\frac{5.2*10^{24} }{6.022*10^{23} }[/tex]

Moles of gold= 8.64 moles

Number of atoms= moles * [tex]6.022*10^{23}[/tex]

Number of atoms of cobalt = [tex]26.2*6.022*10^{23}[/tex]

Number of atoms of cobalt =  [tex]157.7764*10^{23}[/tex]

Number of atoms= moles * [tex]6.022*10^{23}[/tex]

Number of cookies= [tex]1.2*6.022*10^{23}[/tex]

Number of cookies= [tex]7.2264*10^{23}[/tex]

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Answer:

Explanation:

Alkaline earth elements are a group of six chemical elements in group 2 of the periodic table. They are beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra). These elements have very similar properties: they are all shiny, silvery-white, somewhat reactive metals at standard temperature and pressure.

The correct statement about alkaline earth elements is that they are metals with two valence electrons. They readily lose these two electrons to form cations with a charge of +21.

The ionic compound name of GaAsO4 is gallium arsenate.

By moving three electrons from gallium to arsenic, gallium arsenide (GaAs) might be created as an insulator, however this does not happen. Gallium arsenide is a covalent semiconductor, hence the bonding is more strong sphalerite crystals in this shape are referred to as zinc blende or cubic sphalerite.

Examples of ionic compounds include salts, oxides, hydroxides, sulphides, and the bulk of inorganic substances.. The electrostatic interaction between the positive and negative ions holds ionic solids together. As an illustration, sodium ions draw chloride ions, and chloride ions draw sodium ions.

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There are 0.2107 moles of KBr are dissolved in 60.2 mL of a 3.50 M solution.

The molarity of a substance is defined as the number of moles of solute present in 1 litre of a solution.

According to the given data, the molarity of the solution tells us that there are 3.50 moles of KBr in 1000mL of solution. But we only have 60.2mL of solution, so with a mathematical rule of three we can calculate the amount of moles in 60.2mL:

1000 ml - 3.50 moles

60.2 ml -x = 60.2 ml× 3.50 moles/1000 ml

x= 60.2 ml -0.2107 moles

So, there are 0.2107 moles of KBr.

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The "Ring of Responsibility" requires a 15- to 25-foot untreated buffer zone next to water bodies.

A buffer zone is an area of land that separates two or more countries, states, or territories, and is often demilitarized. The purpose of a buffer zone is to provide a space for negotiations and to reduce the possibility of conflict and war. Buffer zones can also be used to protect sensitive natural resources or habitats, such as areas of wilderness or wildlife. Buffer zones can be permanent or temporary, and can range in size from a few miles to hundreds of miles. In addition to physical barriers, buffer zones can also include economic, political, and social measures to reduce tensions between two or more parties. Buffer zones are an important tool in international relations, as they can help to prevent armed conflict and promote peaceful resolution of disputes.

This buffer zone is intended to prevent pollutants from entering the water body and protect it from potential environmental damage.

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The number of moles of AgI that will be formed when 75.0 mL of 0.300 M AgNO₃ is completely reacted is 0.0225 moles.

The number of moles of a substance can be calculated from a stoichiometric approach.

Stoichiometry is the study and calculation of quantitative (measurable) relationships of the reactants and products in chemical reactions (chemical equations).

According to this question, the following reaction is given: 2AgNO₃(aq) + Cal2(aq)-->2Agl(s) + Ca(NO3)2(aq)

moles of AgNO₃ = 0.075 × 0.3 = 0.0225 moles

If 2 moles of AgNO₃ reacted to produce 2 moles of AgI, then 0.0225 moles of AgI will also be produced.

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The most clear, concise and complete Claim is Claim A.

Claim A: According to the data, matter can exist even when it's not visible, the increased mass and volume of the inflated bag show this clearly.

Everything with mass and spatial requirements is considered matter. It contains all of the constituent parts of a substance, such as its molecules, atoms, and fundamental particles. Physical and chemical changes can cause matter to transform into different forms, but no matter what happens, matter is always conserved.

The air-filled balloon thus swells in size and expands, providing a superb illustration of Boyle's rule! When the balloon filled with water, the effects appear different. Even if you press down on the plunger to compress the air in the syringe, the water in the balloon is not compressed.

Claim B lacks a particular reference to the information gathered in the scenario and is a little too vague.

Claim C is deficient and offers no details or justification.

Claim D lacks a clear conclusion, is a little ambiguous, and does not make any mention of the particular information gathered in the scenario.

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2 moles of [tex]O_{2}[/tex] gas and 1 mole of [tex]NO_{2}[/tex] gas would be produced from 2 moles of [tex]HNO_{3}[/tex] during electrolysis.

What is an electrolysis?

Electrolysis of nitric acid using graphite electrodes would result in the following reactions at the anode and cathode:

At the anode (oxidation):

[tex]2HNO_{3}[/tex] + 4 e- → [tex]O_{2}[/tex] + [tex]2NO_{2}[/tex] + [tex]2H_{2}O[/tex]

At the cathode (reduction):

[tex]2H^{+}[/tex] + 2 e- → [tex]H_{2}[/tex](g)

Overall reaction:

[tex]2HNO_{3}[/tex] (aq) +[tex]2H^{+}[/tex](aq) + 4 e- →  [tex]O_{2}[/tex](g) + [tex]2NO_{2}[/tex](g) + [tex]2H_{2}O[/tex](l)

This means that for every 2 moles of nitric acid, 1 mole of [tex]O_{2}[/tex] gas is produced. The products of the electrolysis are  [tex]O_{2}[/tex] gas, [tex]NO_{2}[/tex] gas, and [tex]H_{2}O[/tex].

The concentration of the nitric acid (4 mol/L) indicates that there are 4 moles of [tex]HNO_{3}[/tex] in 1 liter of solution. To calculate the number of moles of  [tex]HNO_{3}[/tex] in a given volume of solution, we can use the following formula:

moles of solute = concentration × volume (in liters)

For example, if we have 500 mL (0.5 L) of the 4 mol/L nitric acid solution, the number of moles of [tex]HNO_{3}[/tex] present would be:

moles of [tex]HNO_{3}[/tex] = 4 mol/L × 0.5 L = 2 moles

Therefore, 2 moles of [tex]O_{2}[/tex] gas and 1 mole of [tex]NO_{2}[/tex] gas would be produced from 2 moles of [tex]HNO_{3}[/tex] during electrolysis.

It's worth noting that the oxidation of nitric acid to form nitrogen dioxide is an exothermic reaction that can produce heat, so the electrolysis may need to be performed under controlled conditions to prevent overheating. Additionally, nitrogen dioxide is a toxic gas that should be handled with care in a well-ventilated area.

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Complete question is: An aqueous solution of 4mol/L nitric acid is electrolysed in an electronic cell using graphite electrodes produced 2 moles of [tex]O_{2}[/tex] gas and 1 mole of [tex]NO_{2}[/tex] gas from 2 moles of [tex]HNO_{3}[/tex] during electrolysis.