Can someone hel me On these questions please

Narrative form or storytelling is used to convey events, experiences, or information. In a narrative form, a single atom of Nitrogen, in the form of Nitrogen gas (N2) travels through different pools. The description of each pool it passes through as a source or a sink is given below:

In the atmosphere:Nitrogen gas is the most abundant gas in the atmosphere, it comprises about 78% of the earth's atmosphere. It is a component of many organic and inorganic compounds in the atmosphere.In the biosphere:Nitrogen-fixing bacteria or lightning can convert nitrogen gas into ammonia. This ammonia can be converted into nitrite and then nitrate through nitrification. This nitrate can be taken up by plants and utilized to make proteins and other molecules that are important for life.

Animals that consume these plants get the nitrogen that they need to build their own proteins. When an organism dies, decomposers like bacteria break down the proteins and return the nitrogen back to the soil in the form of ammonia and other organic compounds.In the atmosphere:Denitrification is the process that converts nitrate to nitrogen gas, which is then released into the atmosphere. This can be done by anaerobic bacteria and other microbes that live in soils and other places where there is little or no oxygen. Human activities that influence the movement of Nitrogen:Humans have a significant impact on the movement of nitrogen in the environment. One of the ways in which they do this is through the use of fertilizers, which contain high levels of nitrogen. These fertilizers can be washed into rivers and streams, where they can cause eutrophication.

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Answer:

4.4 L

Explanation:

Given data:

Initial number of mole = 0.55 mol

Initial volume = 2.0 L

Final volume = ?

Final number of moles = 1.20 mol

Temperature and pressure = constant

Solution:

Formula:

V₁/n₁   = V₂/n₂

V₂ = V₁×n₂/n₁  

V₂ = 2.0 L ×1.20 mol/ 0.55 mol

V₂ = 2.4 L.mol / 0.55 mol

V₂ = 4.4 L

The volume of the gas is 31.3 L.

Using the formula;

PV = nRT

P = pressure of the gas

V = volume of the gas

n = Number of moles of the gas

R  gas constant

T = temperature

To obtain the volume;

V = nRT/P

V = 1.20 mol * 0.082 atmLmol-1K-1 * 318 K/7.0 atm

V = 31.3 L

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Answer:

The energy absorbed in the first move is greater than the energy released in the second move

Explanation:

Electrons require (absorb) energy to move to a higher energy level when there is a large external heat source, the presence of an electric field or by colliding with other electrons

And the amount of energy absorbed by the electron is exactly equal to the change in the energy state between the initial energy level of the electron and the destination energy level

Therefore, given that the energy level of the electron at level 2 is higher than the energy level of the electron when at level 1, we have;

The difference in the energy level between level 4 and level 1 is greater than the difference in the energy level between level 4 and level 2 and more energy is absorbed and therefore, released when the electron moves from level 1 to level 4 than when the electron drops from level 4 to level 2.

The most likely result is that 'the energy absorbed in the first move is greater than the energy released in the second move'.

The procedure which is based on the half-life of a radioisotope is to date the determined age of fossils. Thus, the correct option for this question is D.

Radioisotopes may be defined as an unstable form of a chemical element that significantly liberates radiation as it breaks down and becomes more stable.

According to the context of this question, radioisotopes are unstable due to the presence of extra neutrons in their nuclei and emit various types of radiation.

Therefore, the procedure which is based on the half-life of a radioisotope is to date the determined age of fossils. Thus, the correct option for this question is D.

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Answer:

1 mol contains 6.022*10^23 molecules 0.36 moles contain 0.36 * 6.022*10^23 = 2.2 *10^23 molecules

Explanation:

Answer:

it explodes

Explanation:

Answer:

Mrs girl I'm sorry I don't know

I just need the points

Answer: its the 3rd one

Explanation:

Answer:

gases, debris, groundwater.

Explanation:

if I'm wrong blame me.

hope it helps.

and can I have briniest

When a column is run and the three components are separated, it is possible to isolate the compounds by evaporating the solvent. Then, the total mass recovered is added up and compared to the total mass from the beginning.

The percentage recovery can also be calculated. It is not always 100% because of the following reasons: There is always some amount of loss due to experimental error, like not being able to recover all of the solute from the column. Also, it is hard to recover all of the solvent during evaporation. Finally, some decomposition may occur during the isolation process which reduces the recovery rate. Hence, we can conclude that the percentage recovery is often less than 100%.

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Answer:

37.73 pounds

Explanation:

just trust me.

The density of silver is 10.49 g/cm³.

Given that the unit cell edge of silver is 4.087 Å, we need to find the density of silver. For this, we should calculate the mass and volume of the unit cell of silver.

Calculation of the mass of the unit cell:

The mass of silver for the unit cell can be calculated using the formula:

Mass = Atomic mass / Avogadro's number

Atomic mass of silver = 107.87 g/mol

Avogadro's number = 6.022 × 10²³/mol

Mass = 107.87 / (6.022 × 10²³) = 1.793 × 10⁻²² g

Calculation of the volume of the unit cell:

The volume of the unit cell can be calculated using the formula:

Volume of the unit cell = (Edge length)³

Edge length = 4.087 Å

Volume = (4.087 Å)³ = 68.10 ų = 68.10 × 10⁻²⁴ cm³

Density calculation:

Density = mass / volume

Density = (1.793 × 10⁻²² g) / (68.10 × 10⁻²⁴ cm³)

Density = 10.49 g/cm³

Therefore, the density of silver is 10.49 g/cm³.

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To calculate the density of silver, determine the mass of the unit cell and volume of the FCC structure.

To calculate the density of silver, we first need to determine the mass of the unit cell. The face-centered cubic (FCC) structure of silver consists of 4 atoms per unit cell, and each atom has a mass of 107.87 amu (atomic mass unit).

The volume of the unit cell can be calculated using the formula: volume = (edge length)^3. Given that the unit cell edge is 4.087 Å (angstrom), the volume will be (4.087 Å)^3.

Finally, the density of silver can be calculated by dividing the mass of the unit cell by its volume.

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Acetic acid's acid dissociation constant (Ka) is approximately 2.95× \(10^{(-3)}\).

The pH of a solution is the concentration of hydrogen ions in the solution.

The relationship between pH, Ka, and the concentrations of the acid and its conjugate base is

\(pH = pK_{a} +log \frac{[A^{-}]}{[HA]}\) where \([A^{-}]\) is the concentration of \(CH_{3}COO^{-}\).

In this case, the pH is given as 2.47, and the concentration of acetic acid is 0.63 M. We can assume that the concentration of the conjugate base (acetate ion, \(CH_{3}COO^{-}\)) is inappreciable as compared to the concentration of the acid. It is because the given acid is a weak acid and does not dissociate easily.

Using the Henderson-Hasselbalch equation, we can rearrange it to solve for pKa:

\(pK_{a} = pH-log\frac{[A^{-}]}{[HA]}.\)

As the concentration of the conjugate base is very less so, we can simplify the equation to:

\(pKa = pH \\Ka =10^{(-pKa)}=10^{(-2.47)}.\)

So, Ka ≈ 2.95 × \(10^{(-3)}\).

The complete question is

The pH of a 0.63 M solution of acetic acid is measured to be 2.47. Calculate the acid dissociation constant K of acetic acid. Be sure your answer has the correct number of significant digits.  

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A plot of lnk vs. 1/T has a slope of -k k E a -Ea/R A. The pace of reaction increases as the concentrations of reactant molecules rise. The average kinetic energy of molecules increases as the reactant concentration rises, which is the best explanation for this occurrence.

Concentration in chemistry is calculated by dividing a constituent's abundance by the mixture's total volume. Mass concentration, molar concentration, number concentration, and volume concentration are four different categories of mathematical description.

According to the context, the term may or may not include ions that meet this requirement. A molecule is a collection of two or more atoms held together by attractive forces known as chemical bonds.

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Fluorine, Neon, and Xenon element to demonstrate the strongest London dispersion force and have the highest boiling point.

London dispersion forces are the weakest type of intermolecular forces and are present in all molecules. These forces arise from the temporary separation of positive and negative charges within a molecule, resulting in the formation of instantaneous dipoles. The strength of London dispersion forces depends on the size and shape of the molecule, as well as the distribution of electrons within the molecule. In general, larger and more polarizable molecules tend to have stronger London dispersion forces. Some examples of elements that tend to demonstrate strong London dispersion forces and have high boiling points include: Fluorine: Fluorine is a highly electronegative element with a large atomic radius, making it highly polarizable and able to form strong London dispersion forces. Fluorine has a boiling point of -188.14 °C (-307.57 °F), which is the highest among the elements. Neon: Neon is a noble gas with a relatively large atomic radius and a high electron affinity, resulting in strong London dispersion forces. Neon has a boiling point of -246.06 °C (-410.97 °F). Xenon: Xenon is a noble gas with a large atomic radius and a high electron affinity, resulting in strong London dispersion forces. Xenon has a boiling point of -108.1 °C (-162.58 °F).

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The two molecules produced by the light reactions and used to power the Calvin cycle are ATP and NADPH.

These molecules provide the necessary energy and reducing power for the conversion of CO2 into organic molecules such as G3P, which ultimately leads to the synthesis of glucose (C6H12O6) and other sugars. RuBP, or ribulose bisphosphate, is a molecule involved in the initial steps of the Calvin cycle, but it is not produced by the light reactions.

Similarly, H2O and O2 are not used to power the Calvin cycle, but are instead involved in the light reactions themselves.
The two molecules produced by the light reactions and used to power the Calvin cycle are ATP and NADPH.

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P=20707.7 atm

The ideal gas law is a straightforward formula that describes the relationship between an ideal gas's pressure P, volume V, and temperature T. Unless there is a strong reason to treat gases differently, we normally treat gases as ideal because of how straightforward this relationship is:-

PV=nRT

where ;

P= Pressure=?

V= Volume= 10.5 L

n= no.of mol.= 82.5 mol

R=Ideal gas constant= 8.314 joule / mol kelvin

T=Temperature= 317 K

using Given value:-

P= nRT/ V

P=(82.5 x 8.314 x 317) / 10.5

P=20707.7 atm

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Answer:

The formula is Na2C2O4

Explanation:

I hope this helps

Answer:

Why has my town experienced record-breaking cold and snowfall if the climate is warming? Is there scientific consensus that people are causing today's climate change? Do natural variations in climate contribute to today's climate change?

Explanation:

Yan po ang answer tama po yan

Answer:

The answer I believe is B. Erosion

Explanation:

Just sounds better than all the other choices.

Answer:

erosion b

Explanation:

it breaks down the rocks i remembered this in 4th grade :)

Dipole moment is present between atoms that have differences in their electronegativity. These atoms have unequal distribution of positive and negative charges.  

CO₂, BF₃, CCl₄, and BeF₂ have zero dipole moments because the atoms present in these molecules cancel each other's dipole moments and have overall net zero dipole moments.  

CO₂ is a linear and symmetrical molecule. The molecule has two C=O bonds, which are present in opposite directions. The dipole moment of one C=O bond cancels the dipole moment of the other.  

In BF₃, all three B-F bonds have slightly negative charges on fluorine atoms. The charges are balanced in the symmetrical triangular shape of the molecule. Therefore, the dipole moments of the three bonds cancel each other.  

Similarly, CCl₄ and BeF₂ have overall zero dipole moments because these have regular symmetrical structures.

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Based on the available resources and profit per unit, producing 266 units of Product 1 would result in the highest total profit of BD 585.20.

To determine the maximum number of units of each product that can be produced given the available resources, we need to compare the resource requirements of the products with the available resources.

Let's calculate the resource requirements for each product:

Product 1:

- Metal sheet: 0.250 m2 per unit

- Glass sheet: 0.120 m2 per unit

- Electrical components: 3 units per unit

Product 2:

- Metal sheet: 0.150 m2 per unit

- Glass sheet: 0.050 m2 per unit

- Electrical components: 2 units per unit

Now let's compare the resource requirements with the available resources:

Metal sheets:

- Product 1 requires 0.250 m2 per unit, so the maximum number of units that can be produced using available metal sheets is 90 m2 / 0.250 m2 = 360 units.

- Product 2 requires 0.150 m2 per unit, so the maximum number of units that can be produced using available metal sheets is 90 m2 / 0.150 m2 = 600 units.

Glass sheets:

- Product 1 requires 0.120 m2 per unit, so the maximum number of units that can be produced using available glass sheets is 30 m2 / 0.120 m2 = 250 units.

- Product 2 requires 0.050 m2 per unit, so the maximum number of units that can be produced using available glass sheets is 30 m2 / 0.050 m2 = 600 units.

Electrical components:

- Product 1 requires 3 units per unit, so the maximum number of units that can be produced using available electrical components is 800 units / 3 units = 266 units.

- Product 2 requires 2 units per unit, so the maximum number of units that can be produced using available electrical components is 800 units / 2 units = 400 units.

Now let's determine the maximum number of units that can be produced for each product based on the limiting resource:

Metal sheets: The maximum number of units that can be produced is 360 units (for Product 1) since it requires a larger area of metal sheets.

Glass sheets: The maximum number of units that can be produced is 250 units (for Product 1) since it requires a larger area of glass sheets.

Electrical components: The maximum number of units that can be produced is 266 units (for Product 1) since it requires a larger number of electrical components.

Since the limiting resource for all three resources is reached with Product 1, the maximum number of units that can be produced for Product 1 is 266 units. As for Product 2, it can be produced up to a maximum of 250 units.

Now let's calculate the profit for each product:

Profit per unit for Product 1: BD 2.200

Profit per unit for Product 2: BD 1.400

Total profit for Product 1: 266 units × BD 2.200 = BD 585.20

Total profit for Product 2: 250 units × BD 1.400 = BD 350.00

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Answer:

Increasing the temperature increases reaction rates because of the disproportionately large increase in the number of high energy collisions.

Explanation:

Hope this helps :)

A possible solution to solve erosion and/or deposition on a school campus is to replant the surrounding surface with vegetation in order to avoid the loss of soil.

Erosion is a relatively slow geological process associated with the loss of soil material due to environmental factors such as winds that remove the superficial layer in a given area.

The best solution to solve erosion in a school campus is to surround it with plants in order to avoid direct winds that may erode the soil during the dry period.

In conclusion, a possible solution to solve erosion and/or deposition on a school campus is to replant the surrounding surface with vegetation in order to avoid the loss of soil.

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Explanation:

the correct answer is the atmosphere, for it is the sphere of all gases surrounding the Earth

Answer: Mixture is a liquid with a solid dissolved in it

Explanation:

Mixture is all the states of matter can combine to form either solid. liquid and gas.

The any states of matter can combine and form a mixture . mixture is when two or more substance combine. mixture either be solid, liquids or gases. example salt and water is a mixture. sugar and water is a mixture. mixtures are of two types:

homogeneous mixture is the mixture in which the composition of substances is uniform. salt and water mixture the heterogeneous mixture in which the composition of matter is not uniform. like sand and soil mixture.

Thus, Mixture is all the states of matter can combine to form either solid. liquid and gas.

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Answer: 26C is 25.0 torr

Explanation: The decrease in vapor pressure is proportional to the molality of the solution, so the vapor pressure of the solution at 26°C is 25.0 torr.

First, we need to find the number of moles of glucose and water present in the solution:

n(glucose) = 16.0 g / 180.0 g/mol = 0.089 mol

n(water) = 80.0 g / 18.0 g/mol = 4.44 mol

Next, we'll find the mole fraction of water in the solution:

X_water = n(water) / (n(glucose) + n(water)) = 4.44 / (0.089 + 4.44) = 0.989

Finally, we can find the vapor pressure of the solution using Raoult's law:

P_solution = X_water * P_purewater = 0.989 * 25.21 torr = 25.0 torr

So the vapor pressure of the solution at 26°C is 25.0 torr.

Answer:conversion factor

Explanation:

1-(1-phenylcyclohexyl) piperidine hydrochloride (PCP) was patented as Sernyl and first tested as a dissociative anesthetic.

The main way that 1-(1-Phenylcyclohexyl)piperidine hydrochloride (PCP) affects the central nervous system is either by stimulating it or by depressing it. The signs and symptoms can differ greatly depending on the animal species and dosage. Rats and mice exhibit hyperactivity more conspicuously, and at all dose levels, these animals can also exhibit some signs of central depression, which include a loss of limb muscle coordination.

At low doses, PCP has a calming or quieting effect on pigeons, guinea pigs, hamsters, rabbits, cats, dogs, and monkeys, while at higher doses, it causes a cataleptoid reaction to general anesthesia. Pigeons, guinea pigs, dogs, and monkeys that receive PCP at dosages greater than those used for general anesthesia experience convulsive seizures. Contrarily, convulsion or exhilaration are not immediately apparent.

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Answer:

because it includes all compunds with h and c

Explanation: