choose the statement that is truegroup of answer choicesa. bond line structures are able to clearly define all aspects of a molecule, including resonance. b. resonance stabilization occurs due to the delocalization of electrons. c. a resonance hybrid flips back and forth between the structures. d. resonance structures are shown in parentheses with a single barbed arrow between them.

The surface area of the carbon adsorbent is approximately 2.63 x 10³ square meters per gram.

To calculate nm and K from the given information, use the equation for the Langmuir isotherm:

q/n = 1/K (P/P₀) + 1/nm

​

where:

q = amount of gas adsorbed (mmol/g)

n = amount of gas adsorbed per unit mass of adsorbent (mmol/g)

K = equilibrium constant

P = pressure (kPa)

P0 = saturation pressure (kPa)

nm = maximum adsorption capacity (mmol/g)  

From the given data:

Gradient = 0.391 g mmol-1

Intercept = 0.168 kPa g mmol-1

Comparing this with the Langmuir isotherm equation, we can equate the gradient and intercept to the corresponding terms:

Gradient = 1/nm

Intercept = 1/K

Solving for nm and K:

nm = 1/Gradient = 1/0.391  mmol/g

K = 1/Intercept = 1/0.168  kPa g mmol-1

Now, to determine the surface area, use the equation:

Surface area = nm x Avogadro's number x area per molecule

Given:

N₂ occupies 1.62 x 10⁻¹⁹ m²/molecule

Surface area = nm x 6.022 x 10²³ x 1.62 x 10⁻¹⁹ m²/molecule

Substituting the value of nm:

Surface area = (1/0.391) mmol/g x 6.022 x 10²³ x 1.62 x 10⁻¹⁹ m²/molecule

To convert mmol to moles, divide by 1000.

Surface area = (1/0.391) mol/g x (1/1000) x 6.022 x 10²³ x 1.62 x 10⁻¹⁹m²/molecule

Surface area ≈ 2.63 x 10³ m²/g

Therefore, the surface area of the carbon adsorbent is approximately 2.63 x 10³ square meters per gram.

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Answer:

Electrons

Explanation:

Atoms both have negative and positive particles

Protons are positive

Electrons are negative

Neutrons are neutral

Nuclei is where you find both neutrons and protons in an atom

Answer:

c electrons

Explanation:

First, we write our reaction:

2N2 + 5O2 → 2N2O5 (balanced)

Procedure:

2 x 1 mole N2 -------- 5 x 1 mole O2

X ---------6.79 moles O2

X = 2.72 moles N2

Answer: 2.72 moles N2

Answer:

In short, a solvent is able to dissolve a solute to form a solution. A highly polar solvent such as water is able to dissolve a polar solute. Take for example sodium chloride.

Explanation:

Answer:

B I had the same queastion as this one

Answer:

c

Explanation:

Law of Conservation of Matter for the formation of sodium chloride, in simplest form would be obeyed when 2 moles of sodium react with 1 ,mole of chlorine to form 2 moles of sodium chloride.

According to law of conservation of matter, it is evident that matter is neither created nor destroyed rather it is restored at the end of a chemical reaction .

Law of conservation of matter and energy are related as matter has mass and mass and energy are directly proportional which is indicated by the equation E=mc².Concept of conservation of matter is widely used in field of chemistry, fluid dynamics.

Law needs to be modified in accordance with laws of quantum mechanics under the principle of mass and energy equivalence.This law was proposed by Antoine Lavoisier in the year 1789.

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Answer:

An if/then statement. If ____happens, then _____ happens.

Explanation:

Zara should attend a webinar in identifying Drugs by Using Light (option A) if she wants to learn more about spectrophotometry.

Measuring concentrations present within solutions can be achieved by utilizing spectrophotometry - an approach that utilizes light as its primary mechanism. Its significance in identifying and measuring drugs located in samples continues to grow across numerous research areas due to its effectiveness.

Central to this method is recognizing how distinct substances absorb varying amounts of light dependent on their particular electronic structures on specific wavelengths.

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Answer:

284.48 g/mol

Explanation:

You can find the molar mass of any molecule by looking at a periodic table and adding up all of the masses of each element. When you do this with stearic acid, you get somewhere around 284.5 g/mol. Hope this helped!

Hail is most commonly formed within the cumulonimbus clouds of thunderstorms. Large updrafts of air can throw rain droplets high up into the tops of the cloud.

What is a thunderstorm?

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Answer:

Explanation:

Hope this helps good day

Answer:

The waters' temp increased

Explanation:

The temperature of the water in the swimming pool has increased due to the heat from the Sun. As a result, the particles in the water are moving faster and have a higher kinetic energy than in the morning.

Answer: A.  Pollutants

Explanation:

"A pollutant is a substance or energy introduced into the environment that has undesired effects, or adversely affects the usefulness of a resource. ..." - Wikipedia

Answer:

Pollutants

Explanation:

Pollution is trash and smoke in our atmosphere so i think it would be Pollutants. hopefully that helps

Answer:

Explanation:

pls brainlest meh

Answer:

Bromine forms covalent bonds because it has seven valence electrons, but neon has eight valence electrons and already fulfills the octet rule. Neutral atoms coming together to share electrons.

Hoped this helped

Answer:

the answer is A btw

Explanation:

Reagents that are entirely consumed by a chemical reaction are known as limiting reagents.

Thus, They are additionally known as limiting reactants or limiting agents. A predetermined quantity of reactants are necessary for the reaction to be completed, according to the stoichiometry of chemical reactions.

In the aforementioned reaction, 2 moles of ammonia are created when 3 moles of hydrogen gas react with 1 mole of nitrogen gas.

In most cases, this reactant dictates when the reaction will end. The reaction stoichiometry can be used to determine the precise quantity of reactant that will be required to react with another element. The limiting agent is determined by the mole ratio rather than the mass of the reactants.

Thus, Reagents that are entirely consumed by a chemical reaction are known as limiting reagents.

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Answer:

  665 kJ

Explanation:

We assume that carbohydrates and protein each have 4 kilocalories per gram, and that fat has 9 kilocalories per gram. Then the number of kilocalories in the peanut butter is ...

  4(6 +9) +9(11) = 159 . . . . kilocalories

Each kilocalorie translates to 4.184 kilojoules, so the total is ...

  (159 kCal)(4.184 kJ/kCal) = 665.256 kJ

2 Tbsp of crunchy peanut butter contains about 665 kJ of energy.

The number of kilojoules in two table spoons of crunchy peanut butter obtained by adding the amount of kilojoules in each food type is 673kJ

From the table given ; the amount of kilojoules per gram of each food type is :

I gram of Carbonhydrate = 17 kJ

6 grams of Carbonhydrate = (6 × 17) = 102 kJ

I gram of Fat = 38 kJ

11 grams of Carbonhydrate = (11 × 38) = 418 kJ

I gram of Protein = 17 kJ

9 grams of Carbonhydrate = (9 × 17) = 153 kJ

Therefore, the total kilojoules present is (102 + 408 + 153)kJ = 673 kJ

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Answer:

B

Explanation:

Planting trees sequesters CO2

  all of the other choices produce more CO2 in the atmosphere

The gas expands in volume as the temperature rises. The kinetic energy of the gas's molecules increases with temperature. They make greater direct contact with the container's surface. If the container has the ability to expand, the volume rises until the pressure reaches its starting point.

The energy that an object has as a result of motion is known as kinetic energy. It is described as the effort required to move a mass-determined body from rest to the indicated velocity. The body holds onto the kinetic energy it acquired during its acceleration until its speed changes.

According to Charles' Law, the volume and Kelvin temperature are directly connected when the pressure on a sample of a dry gas is held constant.

Thus,The average speed and kinetic energy of the gas molecules increase as the temperature rises.

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Answer:

5l NO

2

at STP

No. of molecules=

22.4

5

mol=

22.4

5

×N

A

molecules

A) 5ℊ of H

2

(g)

No. of moles=

2

5

mol=

2

5

×N

A

molecules

B) 5l of CH

4

(g)

No. of moles of CH

4

=

22.4

5

mol=

22.4

5

N

A

molecules

C) 5 mol of O

2

=5N

A

O

2

molecules

D) 5×10

23

molecules of CO

2

(g)

Molecules of 5l NO

2

(g) at STP=5l of CH

4

(g) molecules at STP

Therefore, option B is correct.

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Answer:

C. They are used in skin thermography to detect blockage of veins.

Explanation:

Liquid crystals are not typically used in skin thermography to detect blockage of veins. Skin thermography usually relies on infrared imaging to detect and analyze variations in skin temperature, which can indicate potential health issues. Liquid crystals are commonly used in temperature sensors, display technologies (such as in the dial of analog watches), and can be employed in electrical circuits to find potential failure points.

thank you

Answer:

784 gm

Explanation:

Chlorine is more reactive than bromine because it replaces both bromine and iodine.

Fluorine is the most sensitive while on the other hand, the astatine is the least reactive as compared to other elements. The chlorine displaces both bromine and iodine, and bromine displaces iodine because of its high reactivity. The element that replaces other atom is considered as more reactive.

The order of reactivity is that the chlorine is more reactive than bromine, which indicates that chlorine is more reactive than iodine.

So we can conclude that chlorine is more reactive than bromine due to high reactivity.

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Pentane, which has the chemical formula C5H12, reacts with oxygen to produce carbon dioxide and water according to the following balanced chemical equation:

2 C5H12 + 25 O2 -> 10 CO2 + 12 H2O

To determine the mass of carbon dioxide produced when 18.7 grams of pentane is burned, we can use the stoichiometry of the chemical reaction. Stoichiometry is the study of the quantities of reactants and products in a chemical reaction, and it allows us to predict the amount of a product that will be produced based on the amount of reactant consumed.

Since the chemical equation is balanced, we know that for every 2 molecules of pentane that react, 10 molecules of carbon dioxide are produced. This means that for every 2 grams of pentane that react, 10 grams of carbon dioxide will be produced.

Since 18.7 grams of pentane is equivalent to 18.7 / 2 = 9.35 moles of pentane, we can use this value to calculate the number of moles of carbon dioxide produced:

9.35 moles of pentane * (10 moles of CO2 / 2 moles of C5H12) = 9.35 * 5 = 46.75 moles of CO2

To convert the number of moles of carbon dioxide to mass, we can use the molar mass of carbon dioxide, which is 44.01 grams per mole:

46.75 moles of CO2 * 44.01 grams/mole = 2068.7 grams of CO2

Therefore, if 18.7 grams of pentane is burned, approximately 2068.7 grams of carbon dioxide is produced.

(a) Because acid is caustic, dolphins can perish from exposure to it. Acids are compounds that give other things protons (H+). Acid can react with the proteins and lipids in dolphins' skin when they come into touch with it, leading to chemical burns and damage to the underlying tissue. Systemic consequences from this include death.

(b) Because chlorine is a potent oxidizer, it interacts with red-hot iron powder to produce Iron(III) chloride (FeCl3) rather than Iron(II) chloride (FeCl2). FeCl3 is created when chlorine at high temperatures rapidly accepts electrons from iron atoms. Contrarily, iron interacts with HCl, a less potent oxidizer than chlorine, to produce FeCl2.

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The reaction order and specific reaction rate constant can be determined by performing the kinetics experiment on irreversible polymerization A. Kinetic experiments can be used to investigate the rate and mechanism of chemical reactions. Chemical kinetics is the study of chemical reactions' speed and pathway.

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Answer: We must first compute the quantity of H2O that can result from the reaction of AL(CH)3 and H2SO4 in order to determine the mass of H2O produced.

Explanation:

Let's begin by formulating the reaction's balanced chemical equation:

Al2(SO4)3 + 6 H2O + 2 CH4 = 2 AL(CH)3 + 3 H2SO4

According to the equation, 2 moles of AL(CH)3 and 3 moles of H2SO4 combine to form 6 moles of H2O.

1.75 g of AL(CH)3 is equal to: 1.75 g / 78.0 g/mol = 0.0224 mol of AL(CH)3 as 1 mole of AL(CH)3 has a molar mass of roughly 78.0 g/mol.

2.00 g of H2SO4 is equal to: 2.00 g / 98.1 g/mol = 0.0204 mol of H2SO4 as 1 mole of H2SO4 has a molar mass of roughly 98.1 g/mol.

In order to calculate the amount of H2O produced, we must now identify the limiting reagent.

We contrast the moles of AL(CH)3 and H2SO4 in use. AL(CH)3 and H2SO4 have a stoichiometric ratio of 2 to 3. As a result, 3 moles of H2SO4 are required for every 2 moles of AL(CH).

The equation states that 2 moles of AL(CH)3 will yield 6 moles of water. Therefore, we can calculate the moles of H2O created for 0.0224 mol of AL(CH)3 as follows: 0.0224 mol AL(CH)3 (6 mol H2O / 2 mol AL(CH)3) = 0.0672 mol H2O

Finally, we may use the molar mass of H2O to convert its moles to grams. H2O has a molar mass of about 18.0 g/mol:

18.0 g/mol x 0.0672 mol H2O = 1.21 g H2O

As a result, the mass of H2O generated is roughly 1.21 grams if H2SO4 is the limiting reagent.

Answer: $6,600\(\alpha \sqrt[n]{x} \lim_{n \to \infty} a_n\)

Explanation:

Answer:

Si+4 has no.  of electrons=14-4=10

Explanation:

10 electrons, Silicon have with a positive 4 charge. It belongs to the periodic table's group 14: carbon family.

Silicon is an atomic number 14 chemical substance with the symbol Si. It is both a tetravalent metalloid as well as semiconductor that is a strong, brittle solid substance with just a blue-grey metallic sheen.

It belongs to the periodic table's group 14: carbon is above it, whereas germanium, tin, lead, as well as flerovium are below it. It is not overly reactive. Because of its strong chemical affinity to oxygen, Jöns Jakob Berzelius was not able to manufacture and analyze it in pure form until 1823. 10 electrons, Silicon have with a positive 4 charge.

Therefore, 10 electron, Silicon have with a positive 4 charge.

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