what is shielding shell and shielding electrons of Aluminum 13 and rubidium 37?​

Answer: 44.8 L

Explanation:

To find the volume, we would need to use the ideal gas law.

Ideal Gas Law: PV=nRT

We take the given information and plug it into the equation, but first, we have to manipulate the equation so that we are finding volume.

\(V=\frac{nRT}{P}\)

P= 1.00 atm (STP)

T= 273.15 K (STP)

R= 0.08206 Latm/Kmol

n= \(64g*\frac{1mol}{31.998 g O_{2} }=2 mol\)

\(V=\frac{(2 mol)(0.08206Latm/Kmol)(273.15 K)}{1.00atm} =44.8 L\)

The Correct electron configuration of carbon as 1s² 2s² 2p². Option B.

To understand why this is the correct electron configuration, let's break it down step by step:

The atomic number of carbon is 6, which means it has six electrons. Electrons are distributed in energy levels or shells around the nucleus.

The first shell, known as the 1s orbital, can hold a maximum of 2 electrons. Therefore, the first part of the electron configuration is 1s², indicating that two electrons occupy the 1s orbital.

The second shell has two subshells: the 2s orbital and the 2p orbital. The 2s orbital can hold a maximum of 2 electrons, while the 2p orbital can hold a maximum of 6 electrons. In the case of carbon, after the 1s orbital, two more electrons occupy the 2s orbital. So far, we have 1s² 2s².

The remaining two electrons in carbon are placed in the 2p orbital. The 2p orbital consists of three separate p orbitals: 2px, 2py, and 2pz. Each p orbital can hold a maximum of 2 electrons. Therefore, the last part of the electron configuration for carbon is 2p², indicating that two electrons occupy the 2px and 2py orbitals. Option B is correct.

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When the reaction of  Grignard reagent reacted with methanol will yield a tertiary alcohol. Therefore, Option C tertiary alcohol is correct.

Contains a carbon-metal link, Grignard reagents are chemicals used in catalysis. They generally result from the anhydrous reaction of magnesium metal with an alkyl or aryl halide. Because of their high reactivity, Grignard reagents frequently act as nucleophiles in organic reactions.

An alkyl group from a Grignard reagent binds to the oxygen atom of methanol (CH3OH) when it interacts with the methanol, breaking the carbon-metal connection. A precursor alkoxide is created as a result. The equivalent alcohol is then produced by protonating the intermediate alkoxide.

The reaction of a Grignard reagent with methanol leads to the formation of a tertiary alcohol.

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The new pressure in the cylinder of the car engine as the piston is moved to the top is 1062.55kPa

Boyle's law states that "volume of a given quantity of gas is inversely proportional to its pressure  as long as temperature remains constant.

It is expressed as;

P₁V₁ = P₂V₂

Given the data in the question;

To determine the new pressure as the piston is at the top of the cylinder, we substitute our given values into the expression above.

P₁V₁ = P₂V₂

P₂ = P₁V₁ / V₂

P₂ = ( 1.0067107atm × 0.6250L ) / 0.0600L

P₂ = 0.629194188Latm / 0.0600L

P₂ = 10.4865698atm

P₂ = 1062.55kPa

Therefore, the new pressure in the cylinder of the car engine as the piston is moved to the top is 1062.55kPa

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Chromatography is a laboratory technique used to separate and analyze mixtures of molecules based on their physical and chemical properties, such as their size, charge, and polarity. The technique involves passing a mixture of molecules through a stationary phase, such as a column or a thin layer of material, which separates the molecules based on their interactions with the stationary phase.

TLC stands for Thin Layer Chromatography, which is a specific type of chromatography that uses a thin layer of material, such as silica gel or alumina, as the stationary phase.

Retention factor (Rf) is a measure of how far a molecule travels through the stationary phase relative to the distance traveled by the solvent front. Rf is calculated by dividing the distance traveled by the compound by the distance traveled by the solvent front.

Two factors that can affect retention factor values are the polarity of the stationary phase and the polarity of the mobile phase. The polarity of the stationary phase affects how strongly the molecules in the mixture interact with the stationary phase, while the polarity of the mobile phase affects how easily the molecules can move through the stationary phase.

In conclusion,  equation that can be used for the calculation of Rf is:

Rf = distance traveled by compound / distance traveled by solvent front

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The values for an electrically neutral atom of carbon-12 will be: Number of electrons = Number of protons = 6, Mass number = 12, and Atomic number = 6

Neutral atom: When an atom has an equal number of electrons as well as protons, it has an equal number of negative (the electrons) and positive electric charges (the protons). As a result, the atom's total electric charge will be zero, and it is said to be neutral. Therefore, all the elements in the modern periodic table are neutral atoms.

In order from smallest to largest, the values are:

Atomic number (6)

Number of electrons (6)

Number of protons (6)

Mass number (12)

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Sodium carbonate, often referred to as Na2CO3, is a chemical compound composed of atoms of sodium (Na), carbon (C) and oxygen (O).

It is also sometimes called washing soda or soda ash. At room temperature, sodium carbonate is a white, crystalline solid that is very soluble in water. According to the chemical formula of the sodium carbonate molecule, Na2CO3, each molecule consists of two sodium atoms (Na), one carbon atom (C) and three oxygen atoms (O). The atomic configuration in sodium carbonate is shown in the given diagram.

A trigonal planar arrangement is formed when the central carbon atom is bonded to three oxygen atoms. The structure of sodium carbonate is completed by two sodium atoms joined to oxygen atoms.

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Answer:

During complete oxidation of the fatty acid CH3(CH2)14COOH, eight molecules of acetyl-CoA are produced, and the fatty acid goes through the β-oxidation cycle seven times.

Explanation:

In the β-oxidation of fatty acids, an acetyl-CoA molecule is removed from the fatty acid chain after every β-oxidation cycle that the fatty acid undergo, leaving behind a fatty acyl-CoA molecule shortened by two cabon atoms..

The removal of the acetyl-CoA molecule starts from the carboxyl end and shortens the fatty acid molecule by two carbon units. Successive β-oxidation cycles results in the complete oxidaton of the fatty acid molecle to acetyl -CoA molecules.

The compound CH3(CH2)14COOH, is a 16-carbon saturated fatty acid molecule known as palmitic acid.. It undergoes seven passes through the β-oxidation cycle to yield eight molecules of acetyl-CoA with each cycle yielding an acetyl-CoA molecule and a fatty acyl-CoA shortened by two carbon atoms. Finally, the seventh step yields two acetyl-CoA molecules.

During complete oxidation of CH3(CH2)14COOH, eight (8) molecules of acetyl-CoA are produced, and the fatty acid goes through the β-oxidation cycle seven (7) times.

In conclusion, during complete oxidation of CH3(CH2)14COOH, eight (8) molecules of acetyl-CoA are produced, and the fatty acid goes through the β-oxidation cycle seven (7) times.

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Answer:

I'd say it's the first option, A study that follows people for an extended period of time to see if they develop a disease or condition.

Explanation:

Answer:

C. 65 percent

Answer: Yo its -3.8 x 10^-19

Explanation: I got this right. Getting it from that edpuzzle

Answer:

atom

Explanation:

is the basic unit of any substance

concept of atom was conceived in ancient india

scientists today have found substances even smaller

they called

quarks & gluons

energygoclv

Answer:

1st box:4

2nd box:2

3rd box:3

4th box:1

Explanation:

I am not 100% sure on this, but i am pretty confident that this is the answer! BUT If this is somehow wrong, please tell me so i can comment a better answer! :)

Due to property of conduction, conductor allows electrons and electric current to move easily,insulators prevent electric current from moving, electric current is the  flow of an electrical charge in a circuit and electric circuit provides a path for electrons to flow​.

Conduction is defined as a process as a means of which heat is transferred from the hotter end of the body to it's cooler end.Heat flows spontaneously from a body which is hot to a body which is cold.

In the process of conduction,heat flow is within the body and through itself.In solids the conduction of heat is due to the vibrations and collisions of molecules while in liquids and gases it is due to the random motion of the molecules .

When conduction takes place, heat is usually transferred from one molecule to another as they are in direct contact with each other.There are 2 types of conduction:1) steady state conduction 2) transient conduction.According to the type of energy conduction is of three types:

1) heat conduction

2) electrical conduction

3)sound conduction

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Answer: If the gold in the crown was mixed with a less-valuable metal such as bronze of copper then this affects its density by making it to weigh even more and if it weighs more then it has less of chance to float. Observe: Drag each of the crowns into the liquid.

Explanation:

Density can be defined as the compactness of any substance. It is the mass/volume of a substance.

Thus, if the gold crown is mixed with cheaper substances, such as bronze and copper, the density of the crown will decrease and it will become lighter.

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A) Keep temperature constant and increase the pressure of the reaction; reaction rate will increase.

The temperature and pressure of a reaction will affect the rate of reaction.

Pressure

Pressure and the rate of reaction have a direct relationship. This means that as one increases, so does the other. So, if the pressure increases. then the rate of reaction will also increase. This is due to the number of collisions. As pressure increases, the number of collisions between molecules increases. This causes the reaction to occur faster. Thus, the rate of reaction increases.

Temperature

Kinetic energy and temperature are proportional. This means that as temperature increases, so does kinetic energy. This leads to temperature and rate of reaction also having a direct relationship. So, temperature and rate of reaction increase and decrease together. This is due to the fact that when temperature increases, the energy of the molecules increases. This leads to an increased number of collisions. As stated above, more collisions lead to a faster reaction.

Take into account that the starting stereochemistry affects the resulting double bond stereochemistry.

Define  stereoisomer ?

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to round a number correctly, using the conventions followed by this text:option a , b , e are correct

Proclamation 1 is true since adjusting is finished subsequent to doing all multistep computation to keep away from blunder .

Proclamation 2 is likewise true . For instance , if your outcome is 267 and you need to eliminate 7 , then answer would be 27 . So going before number will be expanded by 1 .

Explanation 3 is false . Going before number don't change in the event that digit eliminated is under 5 .

Articulation 4 is false . In the event that digit eliminated is 5, going before number is expanded by 1 assuming it is odd just . On the off chance that first number is even, it stays unaltered.

Proclamation 5 is true .

convection, process by which intensity is moved by development of a warmed liquid like air or water.

Natural convection results from the inclination of most liquids to grow when warmed — i.e., to turn out to be less thick and to ascend because of the expanded buoyancy. Course brought about by this impact represents the uniform warming of water in a pot or air in a warmed room: the warmed particles extend the space they move in through sped up against each other, ascent, and afterward cool and draw nearer together once more, with expansion in density and a resultant sinking.

So option a , b , e are correct .

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In the experiments described in Table 1 and Figure 1, the researchers were able to measure the rate at which Fe2O3 (iron(III) oxide) was formed each day. By doing so, they could indirectly determine the rates at which other substances were produced.

Firstly, since the formation of Fe2O3 involves the reaction of iron with oxygen, the rate at which Fe2O3 was produced could provide information about the rate at which iron (Fe) was consumed in the reaction. If Fe2O3 was forming at a certain rate, it implied that Fe was being consumed at an equivalent rate.

Secondly, since the reaction also involves the reduction of oxygen, the rate at which Fe2O3 was formed could be used to estimate the rate at which H2O (water) was being produced. This is because the reduction of oxygen requires the addition of hydrogen (H) from water.

Additionally, if Fe2O3 was being formed, it suggested that FeO (iron(II) oxide) was an intermediate product. Therefore, the rate at which Fe2O3 was produced also gave insight into the rate at which FeO was being generated.

In summary, by measuring the rate at which Fe2O3 was formed, the researchers indirectly obtained information about the rates of Fe consumption, H2O production, and FeO production in the experiment.

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Answer:

1. The combined number of protons and neutrons remains constant.

2. There are two atoms with mass numbers of 2.

3. It is the number of protons plus neutrons.

4. A nucleus with a greater mass than any of the reactants will be produced.

5. Fusion reactions in the sun convert small amounts of matter into large amounts of energy.

Explanation: I couldn't see the comments so I guess some ppl can't either but here you go got them all correct! :)

Th sun produces energy through fusion reaction by converting small amount of matter into larger amounts of energy.

The sun is able to produce energy because protons of hydrogen atoms present in the sun collide violently in the sun's core and fuse together leading to the formation helium atom.

This process of fussion is referred to as a PP (proton-proton) chain reaction, and it emits an enormous amount of energy

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Answer:

1. To understand the differences between natural and synthetic fibers and their properties.

2. To learn about the manufacturing process of synthetic fibers and plastics and the different types of synthetic fibers and plastics available.

3. To explore the various applications of synthetic fibers and plastics in different industries such as fashion, automotive, construction, and electronics.

4. To investigate the environmental impact of synthetic fibers and plastics and the importance of recycling and proper disposal methods.

5. To evaluate the advantages and disadvantages of synthetic fibers and plastics compared to natural materials and their impact on society and the economy.

6. To analyze the future trends and innovations in the field of synthetic fibers and plastics and their potential impact on different industries and the environment.

Answer:

1.what I observe.

Explanation:

The dependent variable in an experiment is what is being observed in the experimental procedure.

This variable is the one that is closely tied to the effects originating from changing the independent variables.

The correct answer is calcium sulfate. Calcium sulfate acts as a buffer in embalming fluids, helping to maintain the pH of the solution and prevent decomposition of the tissues. It also helps to reduce the amount of water loss by increasing the osmotic pressure of the solution.

Calcium sulfate acts as a buffer in embalming fluids, helping to maintain a constant pH level and prevent the decomposition of tissues.

It does this by releasing or absorbing protons (H+) into the solution as needed, thus preventing the pH from becoming too acidic or too basic. Additionally, calcium sulfate increases the osmotic pressure of the solution, which helps to reduce the amount of water lost from the tissues. This helps the embalmed tissues to remain intact for a longer period of time.

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Answer:

0, 0, 0, +1, 0

Explanation:

Because the compound has a +1 charge overall, the sum of the formal charges must equal +1.  The correct answer is the Lewis structure with as many atoms as possible having the formal charge of 0 with just a single atoms having the +1 formal charge.

The polar molecule different from a non-polar molecule is  option A) Polar molecules have charges separated like poles of a magnet.

Polar molecules and non-polar molecules differ in terms of their distribution of electrical charge.  This results in an uneven distribution of charge, with one side of the molecule having a slightly positive charge (δ+) and the other side having a slightly negative charge (δ-).

This charge separation occurs when there is an uneven distribution of electrons within the molecule, resulting in a molecular dipole. The positive and negative charges are like the poles of a magnet, with one end being slightly positive (δ+) and the other end slightly negative (δ-).

In contrast, a non-polar molecule has an even distribution of electrons and does not have a significant separation of charges. The electrons are shared equally among the atoms in the molecule, resulting in a neutral overall charge and no distinct positive or negative ends.The correct answer is option A.

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When one of the metals in an alloy is mercury the alloy is called a amalgam.

Alloy is defined as the compound which is produced on mixing metals and non-metals. This type of combination is mainly generated in the way to increase those properties of the metals which are absent or they are lacking and addition of non-metals provides it to them. For example: Addition of silver and gold produces an alloy which is known as white gold.

Alloy of mercury with other metals or non-metals is known as Amalgam. Amalgam which we prepare can be in liquid, solid or in paste form depending on the property of mercury. Only the alloys of mercury with metals such as tin, zinc, silver, and copper are used as amalgams.

Thus, we concluded that when one of the metals in an alloy is mercury the alloy is called a amalgam.

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Answer:

32.2 g of Na will produce 43.4 g of Na2O.

Explanation:

The balanced chemical equation for the reaction between sodium and oxygen shows that 4 moles of sodium react with 1 mole of oxygen to produce 2 moles of sodium oxide:

4Na(s) + O2(g) → 2Na2O(s)

To solve this problem, we can use the following steps:

Step 1: Convert the mass of Na given in the problem to moles using the molar mass of Na.

molar mass of Na = 23 g/mol

moles of Na = mass of Na / molar mass of Na

moles of Na = 32.2 g / 23 g/mol

moles of Na = 1.4 mol

Step 2: Use the mole ratio from the balanced chemical equation to determine the moles of Na2O produced.

From the balanced chemical equation, we can see that 4 moles of Na react to produce 2 moles of Na2O.

moles of Na2O = (moles of Na / 4) x 2

moles of Na2O = (1.4 mol / 4) x 2

moles of Na2O = 0.7 mol

Step 3: Convert the moles of Na2O to grams using the molar mass of Na2O.

molar mass of Na2O = 62 g/mol

mass of Na2O = moles of Na2O x molar mass of Na2O

mass of Na2O = 0.7 mol x 62 g/mol

mass of Na2O = 43.4 g

Therefore, 32.2 g of Na will produce 43.4 g of Na2O.

There are approximately 6.022 × 10^23 atoms in 12 grams of Carbon-12 (12C).

The number of atoms in a given amount of a substance can be calculated using Avogadro's number, which represents the number of atoms or molecules in one mole of a substance. Avogadro's number is approximately 6.022 × 10^23.

Carbon-12 is a specific isotope of carbon, with an atomic mass of 12 atomic mass units (amu). One mole of Carbon-12 has a mass of 12 grams. Since one mole of any substance contains Avogadro's number of particles, in the case of Carbon-12, it contains 6.022 × 10^23 atoms.

Therefore, if we have 12 grams of Carbon-12, which is equal to one mole, we can conclude that there are approximately 6.022 × 10^23 atoms in this amount of Carbon-12.

In summary, 12 grams of Carbon-12 contains approximately 6.022 × 10^23 atoms. Avogadro's number allows us to relate the mass of a substance to the number of atoms or molecules it contains, providing a fundamental concept in chemistry and enabling us to quantify and understand the microscopic world of atoms and molecules.

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Answer: the mass of CO produced is 2.181 x 10^3 g

Explanation:

The question requires us to calculate the amount of CO, in grams, that would be obtained in the reaction given, considering that 1380 g of Cl2 were produced.

The following chemical equation was provided by the question:

Note that the chemical equation is not properly balanced (there are 4 H atoms on the left side and 20 H atoms on the right side).The balanced chemical equation is as it follows:

From the balanced chemical equation shown above, we can see that when 2 moles of Cl2 are produced, 8 moles of CO are produced. Thus, to solve this problem, we must calculate how many moles of Cl2 were obtained (considering the mass given, 1380 g), and then relate this amount with the stoichiometry of the reaction.

We can calculate the number of moles of a substance considering the following equation:

The molar mass of Cl2 is 70.91 g/mol and the mass of this substance that was produced is 1380 g:

Therefore, 19.46 moles of Cl2 were obtained.

Considering the stoichiometry of the reaction, given by the balanced chemical equation, we can write:

2 mol Cl2 -------------------------- 8 mol CO

19.46 mol Cl2 -------------------- x

Solving for x, we'll have:

Therefore, 77.84 moles of CO were obtained in this reaction.

We can convert this amount of moles of CO to its correspondent mass, in grams, using the following equation:

The molar mass of CO is 28.01 g/mol, thus its mass will be:

Therefore, the mass of CO produced is 2.181 x 10^3 g.