how much energy, in kj, is carried by one mole of photons of blue light absorbed by proflavine molecule at 470 nm?

The presence of rust in the water in Westfield is likely due to the corrosion of iron pipes or fixtures in the water distribution system. When iron pipes come into contact with oxygen and water, a chemical reaction known as oxidation occurs, leading to the formation of rust.

The rust can then detach from the pipe surface and become suspended in the water supply, leading to the discoloration of the water.Factors such as pH, temperature, and the presence of other minerals in the water can also contribute to the formation of rust. For instance, acidic water can increase the rate of corrosion, while the presence of minerals like manganese can accelerate the formation of rust.

To address the issue of rust in the water supply, it is essential to identify the source of the corrosion and take appropriate measures to prevent or reduce it. This can include replacing corroded pipes or fixtures, adding corrosion inhibitors to the water supply, or adjusting the pH of the water to reduce its acidity. Regular maintenance and monitoring of the water distribution system can also help to prevent the formation of rust and ensure the delivery of safe and clean water to the residents of Westfield.

In summary, the rust in the water in Westfield is likely due to the corrosion of iron pipes or fixtures in the water distribution system, and addressing this issue requires identifying the source of the corrosion and implementing appropriate measures to prevent or reduce it.

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Answer:

Explanation:

When I was growing up, one of the most popular cartoons was a little possum whose name was Pogo. He often said

“We have met the enemy and he is us.”

It is something Pogo said more than once. We are the problem with biodiversity being threatened.

We clear land for agriculture, not only in Canada and the United States, but in places like Brazil where it matters what is done to the environment. Those trees are the planet's lungs. Whole environmental groups are devoted to stopping the harvesting of trees that are hundreds of years old.

Our oceans have become cesspools of plastic.

Our rivers have become dumping grounds for all kinds of pollutants like paint and car tires to name just a couple.

Our landscape has been cluttered by billboards advertising things that are hundreds of miles away.

There's mining, oil, and other industries that make Mother Nature shudder every time they come near her.

✯Correct Answer✯:

The correct answer that you are looking for would be:  

B.) Habitat loss

♪Explanation♪:

Habitat loss answer option is correct because removing trees deprives the forest of portions of its canopy, which blocks the sun’s rays during the day and retains heat at night. That disruption leads to more extreme temperature swings that can be harmful to plants and animals. Yet the effects of deforestation reach much farther, it is very sad for the environment ＞﹏＜.

I hope this helped you,

And I do hope you enjoy the rest of your day!  Here take this heart you need it. (ɔ◔◡◔)ɔ ♥          

-Kirby ★ ツ ✌                 

Answer:

Obtain the relative numbers of atoms of each element in the compound by dividing the number of moles of each element in the 100 g sample by the number of moles of the element present in the smallest amount.

Answer:

Obtain the relative numbers of atoms of each element in the compound by dividing the number of moles of each element in the 100 g sample by the number of moles of the element present in the smallest amount.

Answer: After the carbon dioxide vaporises, the partial pressure of CO2 is approximately 3.347 atm, and the total pressure in the container is approximately 4.321 atm.

Explanation:

To calculate the pressure in the container after all the carbon dioxide (CO2) vaporizes, we can use the ideal gas law, which states:PV = nRTWhere:

P = Pressure

V = Volume

n = Number of moles of gas

R = Ideal gas constant (0.0821 L·atm/(mol·K))

T = Temperature in Kelvin

First, let's calculate the pressure in the container when the solid CO2 vaporizes.Given:

Mass of solid CO2 = 7.8 g

Volume of the container = 4.0 L

Temperature = 27°C = 27 + 273.15 = 300.15 K

We need to convert the mass of CO2 into moles. The molar mass of CO2 is approximately 44 g/mol.Number of moles (n) = mass/molar mass

n = 7.8 g / 44 g/mol ≈ 0.1773 mol

Now, we can substitute the values into the ideal gas law equation to find the pressure (P):

PV = nRTP * 4.0

L = 0.1773 mol * 0.0821 L·atm/(mol·K) * 300.15 K

P = (0.1773 * 0.0821 * 300.15) / 4.0

P ≈ 3.347 atm

Therefore, the pressure in the container after all the carbon dioxide vaporizes is approximately 3.347 atm. Now let's consider the scenario where the container already contains air at 740 torr (which can be converted to atm by dividing by 760 torr/atm).Given:

Mass of solid CO2 = 7.8 g

Volume of the container = 4.0 L

Partial pressure of air = 740 torr / 760 torr/atm ≈ 0.974 atm

Temperature = 27°C = 27 + 273.15 = 300.15 K

Using the ideal gas law, we can find the pressure of carbon dioxide and the total pressure in the container after the CO2 vaporizes.

First, let's calculate the pressure of carbon dioxide (PCO2) when it vaporizes:

PV = nRT

PCO2 * 4.0 L = 0.1773 mol * 0.0821 L·atm/(mol·K) * 300.15 K

PCO2 = (0.1773 * 0.0821 * 300.15) / 4.0

PCO2 ≈ 3.347 atm

The partial pressure of carbon dioxide after it vaporizes is approximately 3.347 atm. To calculate the total pressure in the container, we add the partial pressure of carbon dioxide to the partial pressure of air:

Total pressure = Partial pressure of CO2 + Partial pressure of air

Total pressure = 3.347 atm + 0.974 atm

Total pressure ≈ 4.321 atm

Therefore, after the carbon dioxide vaporizes, the partial pressure of CO2 is approximately 3.347 atm, and the total pressure in the container is approximately 4.321 atm.

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Answer: Carbon Monoxide (CO), Sulfur Dioxide (SO2), and Nitrogen Dioxide(NO2).

Explanation:

Exposure to these noxious gases severely affects the respiratory system of an individual thus deteriorating his health. Pneumonia and Bronchitis are the tips of an iceberg among various diseases and prolonged illnesses.

Answer:

Below:

Explanation:

Instead of a single, centralized brain, jellyfish possess a net of nerves. This “ring” nervous system is where their neurons are concentrated—a processing station for sensory and motor activity. These neurons send chemical signals to their muscles to contract, allowing them to swim.

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It's Muska

The number of moles that the sample which occupies a volume of 45.1 L at STP contains is 1.2 moles.

At STP,

P = 1atm

T = 273 K

Given,

V = 45.1 L

R = 0.0831 kJ/mol K

By ideal gas law,

PV = nRT

Substituting the values and solve the equation to obtain the value of n,

45.1 × 1 = n × 0.0831 × 273

⇒ n = 45.1/22.6863

⇒ n = 1.2 moles

Hence, the number of moles of the gas is 1.2 moles.

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Together with the creation of H2O, a covalent bond is created between a carbon and a nitrogen atom.

When two amino acids come together, a peptide bond is created.

It entails the release of water together with the fusion of the carboxyl group of one amino acid (COOH) with the amino group of another amino acid (NH2) (H2O).

Because a carbon atom (C) and a nitrogen atom (N) share electrons, a peptide bond is a sort of covalent link (N).

Hence, along with the creation of H2O, the reaction depicted in the graphic attached also results in the development of a covalent bond between a carbon atom and a nitrogen atom.

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The container contains about 0.697 molecules of CH4 gas.

We must apply the Gas Laws, whose says that PV = nRT, wherein P is just the pressures, Divided by the volume, n represents the size of molecules, R is the classical physics characteristic, and T is the absolute temperature in kelvin, to determine how many moles of CH4 gas are contained in the container.

The temperature must first be converted to Celsius to Kelvin using the formula: 47°C Plus 273.15 Equals 320.15 K.

The molar mass can then be determined using the Ideal Gas Law:

n = (PV)/(RT) = (0.497 as of now * 3.7 L)/(0.0821/molK * 320.15 K) ≈ 0.697 pinches

Therefore, the amount of CH4 methane in the container is roughly 0.697 moles.

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In the given chemical reaction, calcium (Ca) is oxidized, whereas oxygen (O2) is reduced. This is because oxidation involves the loss of electrons, while reduction involves the gain of electrons.

In the reaction, each calcium atom loses two electrons to form Ca2+ ions, while each oxygen molecule gains two electrons to form O2- ions. The oxidation state of calcium increases from 0 to +2, indicating that it has lost electrons and been oxidized. Conversely, the oxidation state of oxygen decreases from 0 to -2, indicating that it has gained electrons and been reduced.
The formation of CaO(s) from Ca(s) and O2(g) is an example of a redox reaction, where reduction and oxidation occur simultaneously. Calcium acts as the reducing agent, as it causes oxygen to be reduced by donating electrons, while oxygen acts as the oxidizing agent, as it causes calcium to be oxidized by accepting electrons.
In summary, in the reaction 2 Ca(s) + O2(g) → 2CaO(s), calcium is oxidized, and oxygen is reduced.

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Answer:

universal law of gravitation

Explanation:

According to Newton's law of gravitation, every particle in universe attracts every other particles with a force which is directly proportional to the product of their masses and inversely proportional to the square of distance between their centres!

Consider two particles having masses m1 and m2 and are apart r units, then the gravitational force acting between them is given by

\(F = G \cdot \frac{m1\cdot \: m2}{ {r}^{2} } \)

Where G is universal gravitational constant or proportionality constant!!

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The correct option is D) Water and dichloromethane

A good extraction system is a process that is used to separate compounds. When you have a mixture of compounds and you want to separate them, you need a good extraction system. When you are using an extraction system, you use a pair of solvents that will separate the compounds in your mixture.

There are many different pairs of solvents that you can use for extraction, and each one has its own advantages and disadvantages. Water and dichloromethane are the best pair of solvents for an extraction system. This is because water and dichloromethane are immiscible. They do not mix together. This makes them perfect for extracting compounds that are soluble in one solvent and not the other.

When you use water and dichloromethane as a pair of solvents, you can easily separate your compounds.

First, you add your mixture to the solvents.

Then, you shake the mixture to allow the compounds to dissolve into the appropriate solvent.

Finally, you separate the two solvents and collect your compounds.

This is the best extraction system because it gives you a high yield and high purity of your compounds. It is also a very quick and easy process.

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Answer:

c

Explanation:

Nh4OH + HCL ---> NH4Cl + H3O

so ph decreases as H3O increases

and OH also decreases

When NH4OH is added to a solution with HCI, the pH of the solution B ) increases as the OH- concentration increases.

NH₄OH is a strong base as a result of the presence of the OH compound which is a base as well. Bases have high pH and acids have low pH.

This means that as the OH- concentration increases, the solution is being made to be more basic which would lead to the pH rising.

In conclusion, option B is correct.

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Answer: Here are some examples of atoms that behave similarly to chlorine in terms of electron affinity:

Fluorine (F) has the highest electron affinity of any element, so it is more electronegative than chlorine. However, fluorine and chlorine are both halogens, which means that they have similar chemical properties.

Bromine (Br) is also a halogen, and it has a very similar electron affinity to chlorine. In fact, bromine is often used as a substitute for chlorine in organic chemistry.

Iodine (I) is the third halogen, and it has a slightly lower electron affinity than chlorine. However, iodine is still a very electronegative element, and it behaves similarly to chlorine in many chemical reactions.

Nitrogen (N) is not a halogen, but it has a relatively high electron affinity. This is because nitrogen has a small atomic radius, which means that its valence electrons are held more loosely than the valence electrons of larger atoms.

Oxygen (O) is also not a halogen, but it has a relatively high electron affinity. This is because oxygen has a small atomic radius and it also has two unpaired valence electrons.

Explanation: Fluorine has the highest electron affinity, followed by chlorine, bromine, and iodine.

Nitrogen and oxygen also have high electron affinities because they have small atomic radii and unpaired valence electrons.

Atoms with high electron affinity are more likely to attract electrons, which means they are more electronegative.

The amount of heat absorbed when the temperature of the sodium hydroxide solution increases from 23.2 °C to 45.3 °C is 1084.4 J.

To calculate the amount of heat absorbed when the temperature of the sodium hydroxide solution increases from 23.2 °C to 45.3 °C, we can use the formula:

q = m x C x ΔT

where q is the heat absorbed, m is the mass of the solution, C is the specific heat capacity of the solution, and ΔT is the change in temperature.

First, we need to calculate the mass of the solution. The mass of the solution is the sum of the mass of the sodium hydroxide and the mass of water:

mass of solution = mass of NaOH + mass of water

mass of solution = 1.00 g + 25.0 g

mass of solution = 26.0 g

Next, we need to calculate the specific heat capacity of the solution. The specific heat capacity of a solution is the amount of heat required to raise the temperature of one gram of the solution by one degree Celsius. The specific heat capacity of a solution can be estimated as the weighted average of the specific heat capacities of the solute and solvent. The specific heat capacity of water is 4.18 J/g °C, and the specific heat capacity of sodium hydroxide is 1.23 J/g °C. The weight fraction of water in the solution is:

weight fraction of water = mass of water / mass of solutionweight fraction of water = 25.0 g / 26.0 g

weight fraction of water = 0.9615

The weight fraction of sodium hydroxide is therefore:

weight fraction of NaOH = 1 - weight fraction of water

weight fraction of NaOH = 1 - 0.9615

weight fraction of NaOH = 0.0385

Using these weight fractions and specific heat capacities, we can calculate the specific heat capacity of the solution:

C = (0.9615 x 4.18 J/g °C) + (0.0385 x 1.23 J/g °C)

C = 4.08 J/g °C

Finally, we can use the formula to calculate the heat absorbed:

q = m x C x ΔT

q = 26.0 g x 4.08 J/g °C x (45.3 °C - 23.2 °C)

q = 1084.4 J

Therefore, the amount of heat absorbed when the temperature of the sodium hydroxide solution increases from 23.2 °C to 45.3 °C is 1084.4 J.

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The correct abbreviation for each metric unit is:

Kilogram - kg, Milliliter - ml, Kilometer- Km, Meter- m, Millimeter - mm, Centimeter - cm, Gram - g,  Liter - L, and Milligram - mg.

The metric system can be described as a system of measurement that succeeded the decimalized system based on the meter.  Each of the fundamental dimensions can be expressed by a single base unit of measure.

For quantities derived from the base units of the system, units derived from the base units are used such as the square meter being the derived unit for the area, a quantity derived from length.

Metric units can be described as units based on the meter, gram, or second and decimal multiples or sub-multiples of these. The units of the International System of Units (SI). By extension, they involve units of electromagnetism from the CGS units and SI units systems.

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Sun is the centre of the solar system containing 8 planets. Some planets have moons revolving around them. The planet from the sun which a moon is Earth.

Planets are spatial objects formed by gases, soil, and dust and are having a gravitational force. The only living planet is earth. The moon of earth is itself called moon which is revolving around the earth.

In solar system the nearest planet to sun is mercury which have no moons. Next is venus also having no moons. The next planet in the series is earth having one moon.

After earth, mars is closest to sun which have two moons namely Deimos and Phobos. After mars,Jupiter having the highest number of moons and then saturn.

Therefore, the first planet from sun having at least one moon is earth.

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Answer:

Explanation:

Answer:,,,,,

Answer:

Acoustic tractor beams use the power of sound to hold particles in mid-air, and unlike magnetic levitation, they can grab most solids or liquids even small insects. For the first time engineers have shown it is possible to stably trap objects larger than the wavelength of sound in an acoustic tractor beam. This discovery could enable the manipulation of drug capsules or micro-surgical implements within the body. The discovery could even lead to levitating humans.

Explanation:

Answer:

2 .Sulphurous acid

Explanation:

Sulphur dioxide can dissolve in water to form Sulfurous acid(H2SO3). sulphurous acid is weackly dibasic acid. sulphur dioxide is a major component of acid rain since it mixes with vapour in the atmosphere reacting to produce H2So4 .

Answer:

Sulphuric acid

Explanation:

Sulphuric acid is a major component of acid rain since it mixes with water vapour in the atmosphere, reacting to produce Sulphuric acid.

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Answer:

double replacement occurs

The element that can be found in both plays and stories is "characters."

Characters are an essential element of both plays and stories. They are the individuals or entities that drive the narrative, interact with each other, and contribute to the development of the plot. In plays, characters are typically portrayed by actors who perform their roles on stage, while in stories, characters are described and depicted through written words.

Characters can be central or supporting figures in a play or story, and they play a vital role in engaging the audience or readers. They have distinct personalities, motivations, and relationships that influence the events and conflicts within the narrative. Through their actions, dialogue, and character development, they contribute to the overall themes and messages conveyed by the play or story.

Whether it is a theatrical production or a written narrative, the presence and portrayal of characters are fundamental to creating engaging and compelling plays and stories.

Thus, the element that can be found in both plays and stories is "characters."

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Matter are anything that is made up of atoms. The quantity of matter can be observed only on the basis of mass and volume calculation. Therefore, matter can be divided on the basis of motion and spacing of the particles.

Matter is a substance that has some mass and can occupy some volume. The matter is mainly used in science. Matter can be solid, liquid or gas.

Matter is anything that is made up of atoms. Anything around us that can be physically seen and touched are matter. Ice, water and water vapors are example of matter.

The motion and spacing of particles is zero in case of solid.  The motion and spacing of particles is more than solid in case of liquid.  The motion and spacing of particles is the most in case of gas.

Therefore, matter can be divided on the basis of motion and spacing of the particles.

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At a temperature of 150 °C and a pressure of 1 atm, the maximum volume that 5 moles of gas produced by the full breakdown of 1 mole of Ca(NO3)2 would occupy are 17.1 L.

Would occupy at a temperature of 150 °C and 1 atm pressure. Using the ideal gas formula, PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature, it is possible to determine the maximum volume of the gas created. The volume of 5 moles of gas at 150 °C (423 K) and 1 atm pressure can be computed as follows:

V = (nRT)/P = (5 mol x 0.0821 L/atm/mol/K/423) K / 1 atm = 17.1 L

The balanced equation predicts that 2 moles of Ca(NO3)2 will result in 4 moles of NO2 and 1 mole of O2. As a result, 1 mole of Ca(NO3)2 completely decomposes into 4 moles of gas and 1 mole of solid.

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The compound CaCO3, also known as calcium carbonate, contains both ionic and covalent bonds. Therefore, the correct answer is I and II, as both ionic and polar covalent bonds are present in CaCO3.

The correct option is E.

The bond between calcium and carbonate is ionic, as calcium is a metal and carbonate is a polyatomic ion with a negative charge.

The bonds between the atoms within the carbonate ion (carbon and three oxygen atoms) are covalent.

These covalent bonds can be further classified as polar covalent bonds, as the oxygen atoms have a higher electronegativity than carbon and therefore attract the shared electrons more strongly, creating partial charges on the molecule.

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MM Zn(NO₃)₂ = 189.36 g/mol

mass 1 mol Zn(NO₃)₂ = 189.36 g

mass hydrate = 100 / 63.67 x 189.36 = 297.409 g

mass 1 mol hydrate = 297.409 g

MM hydrate = 297.409 g/mol

MM hydrate = MM Zn(NO₃)₂ + MM xH₂O

297.409 = 189.36 + x(18)

x = 6

Answer:

Explanation: the answer is YES

CO(NH2)2  and (NH2)2 CO is the urea

Answer:

1.57694 L

Explanation:

To convert from mL to L, you simply divide the value by 1000.

Answer:

false

Explanation:

because  i know it

The solubility of a gas in a liquid under different pressures can be calculated using Henry's Law.

The solubility of a gas in a liquid under different pressures can be calculated using Henry's Law, which describes the relationship between the pressure of a gas and its solubility in a liquid. According to Henry's Law, at a constant temperature, the solubility (S) of a gas in a liquid is directly proportional to the partial pressure (P) of the gas above the liquid.

Mathematically, Henry's Law is expressed as:

S = k * P

Where:

S = Solubility of the gas in the liquid (usually in mol/L or g/L)

k = Henry's Law constant, which is specific to the gas and the solvent at a given temperature (units depend on the units of pressure and solubility chosen)

P = Partial pressure of the gas above the liquid (usually in atm or kPa)

To calculate the solubility of a gas in a liquid under different pressures, you would typically perform the following steps:

Determine the Henry's Law constant (k) for the specific gas and solvent at the given temperature.

Measure or obtain the partial pressure (P) of the gas above the liquid at the desired pressure conditions.

Use the Henry's Law equation to calculate the solubility (S) of the gas in the liquid:

S = k * P

The solubility will be in units of mol/L (molarity) or g/L, depending on the units used for the Henry's Law constant and partial pressure.

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