Calculate the kinetic energy of an electron ejected by a photon with wavelength 1.83 × 102 nm from a metal with a binding energy of 3.71 eV. Enter your answer in scientific notation.

Answer:

Explanation:

The force acting on an object given it's mass and acceleration can be found by using the formula

force = mass × acceleration

From the question we have

force = 30 × 2.2

We have the final answer as

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Answer: well there is a lot of examples that can be used but i feel like a good answer will be a flower peddle once broken its still a peddle but its either larger or smaller than what it originated. another example can be a tree. you can have many trees that are huge in size or you can have small ones. once snapped in half it will still be a tree but the size of the tree will not remane the same but it will still be a tree through and through

Explanation:

Answer:

218.98 grams

Explanation:

Given that,

No. of moles, n = 2.3

The molar mass of magnesium chloride is 95.211 g/mol.

We need to find the mass of 2.3 moles of magnesium chloride.

We know that,

No. of moles = given mass/molar mass

Let m be the given mass. So,

\(m=n\times M\\\\=2.3\times 95.211 \\\\=218.98\ g\)

So, the required mass is equal to 218.98 grams.

A stiff metal bottle containing helium floats at the surface of the pond. If additional helium is added to that bottle, leaving its temperature and volume unchanged, the bottle will float because of the Archimedes principle.
This principle states that the buoyant force on a body is equal to the weight of the fluid displaced by the body. When a body is placed in a fluid, it experiences an upward force known as the buoyant force. If the buoyant force is greater than the weight of the body, the body will float.
In this case, the bottle containing helium floats on the surface of the pond because helium is less dense than air. Adding additional helium to the bottle will increase the volume of helium inside the bottle, but the temperature and volume of the bottle will remain the same. As a result, the buoyant force acting on the bottle will increase, making it float more easily on the surface of the pond.
However, it should be noted that the buoyant force acting on the bottle is also affected by the density of the fluid. If the density of the pond water increases, the buoyant force acting on the bottle will decrease, making it more difficult for the bottle to float. Therefore, the buoyancy of the bottle is determined by both the density of the fluid and the amount of helium in the bottle.

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Answer:

endothermic or absorb energy

Explanation:

google :)

Answer: 202.15

Explanation:

-71°C + 273.15

= 202.15K

Monoxide, nitrogen oxides, particle pollution, hydrogen sulfide, and volatile organic substances are the top five air pollutants.

Carbon Monoxide

The burning of fuels in both industries and fuel engines generates NO2, the most hazardous of these compounds. High amounts can impede atmospheric vision and harm the animal heart and lungs.

The pollutants that pose the greatest threat to public health include sulfur dioxide, ozone, nitrogen dioxide, monoxide, and particulate matter (PM, CO, O3, and NO2) (SO2). Both brief and deepening to these different pollutants can result in health concerns.

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Answer:

9 protons

Explanation:

By looking at the periodic table, you will see that Fluorine has 9 protons. Since the number of electrons equal the number of protons, Fluorine has 9 electrons as well. Meanwhile, it's mass number of 19, minus 10 neutrons, gives you 9 protons or electrons. Hence, the atom would be Fluorine.

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Answer:

i think so for this i will 9 protons . atomic mass is 19. 10 neutrons

The specific heat of a piece of iron which was heated from 0.0°C to 35.0°C and absorbed 2464 J of energy as heat is 0.451 J/g°C

In other to calculate the specific heat of the iron, let us use the equation:

q=mcΔT

Where :

q is  absorbed heat,

m is mass of the sample,

c is the specific heat, and

ΔT is the change in temperature.

lets input the values:

2464 J=(16 g)(c)(35.0°C −0.0°C)

2464 J=(16 g)(c)(35.0°C)

\(c=\frac{2464 J}{(16 g)(35.0^0C)}\)

= 0.451 J/g°C

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Answer:

You are correct however there is also potential energy because the energy is released over a period of time.

Hope this helps!

Butyric acid is responsible for the foul smell of rancid butter. The pKa of butyric acid is 4.84. The pKb for the butyrate ion is 4.84.

The pKb of the butyrate ion can be calculated using the Henderson-Hasselbalch equation:

pKb = pKa + log([base] / [acid])

pKb = 4.84 + log([butyrate] / [butyric acid])

pKb = 4.84 + log(1) = 4.84

The Henderson-Hasselbalch equation is a mathematical expression that relates the pH of a solution containing a weak acid and its conjugate base to the pKa of the weak acid and the concentrations of the acid and its conjugate base. The equation is:

pH = pKa + log([conjugate base]/[weak acid])

where: pH is the measure of the acidity of the solution ; pKa is the negative logarithm of the acid dissociation constant of the weak acid ; [conjugate base] is the concentration of the conjugate base of the weak acid in the solution ; [weak acid] is the concentration of the weak acid in the solution

The Henderson-Hasselbalch equation is useful in calculating the pH of buffer solutions, which are solutions that can resist changes in pH when small amounts of acid or base are added to them. Buffer solutions are made up of a weak acid and its conjugate base, and the Henderson-Hasselbalch equation helps to determine the pH range over which the buffer is effective.

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Answer:

A thermodynamic quantity equivalent to the capacity of a system to do work.

Explanation:

Answer:

A

Explanation:

The formula for mechanical energy is mechanical energy = kinetic energy + potential energy.

Answer:

- Water from beaker will move to the tube

Explanation:

Total percentage of water in the beaker;

\( = { \tt{100\% - 5\%}} \\ = { \tt{95\%}}\)

Total percentage of water in dialysis tube;

\({ \tt{ = 100\% - 15\%}} \\ = { \tt{85\%}}\)

So, there is much water concentration in the beaker than the dialysis tubing, this causes a determined percentage of water to diffuse to the tubing, and determined percentage of salt to move from tubing to the beaker.

Percentage of water moving to tubing;

\({ \tt{ = 95\% - 85\%}} \\ = { \tt{10\%}}\)

Percentage of salt moving from tubing to beaker

\({ \tt{ = 15\% - 5\%}} \\ { \tt{ = 10\%}}\)

Answer:

C. a blue solid dissolving in a water and changing the water to a blue colour

Explanation:

Answer:

it's volume also decrease

1.  James falls into the "Overweight" category.

2. James has experienced a weight loss of approximately 11.32% compared to his usual weight.

3. A high risk of malnutrition.

4. James's estimated resting energy needs are approximately 1713 calories per day.

5. Daily protein requirement = 59 grams of protein per day

1. To calculate James's BMI (Body Mass Index), we'll use the formula:

BMI = (weight in pounds x 703) / (height in inches x height in inches)

BMI = (196 pounds x 703) / (72 inches x 72 inches)

BMI = 137,588 / 5,184

BMI = 26.6 kg/m^2

Based on the weight classification categories, James falls into the "Overweight" category.

2. To determine the percentage weight change, we'll use the formula:

Percentage weight change = [(current weight - usual weight) / usual weight] x 100

Percentage weight change = [(196 pounds - 221 pounds) / 221 pounds] x 100

Percentage weight change = (-25 pounds / 221 pounds) x 100

Percentage weight change = -0.1132 x 100

Percentage weight change = -11.32%

James has experienced a weight loss of approximately 11.32% compared to his usual weight.

3. To categorize the patient's risk of malnutrition based on weight change, we need to consider the percentage weight change. Generally, a weight loss of more than 10% is considered significant and may indicate a high risk of malnutrition. In James's case, with a weight loss of 11.32%, he would be categorized as having a high risk of malnutrition.

4. To calculate James's resting energy needs using the Mifflin-St. Jeor equation, we'll use the formula for men:

Resting energy needs = (10 x weight in kg) + (6.25 x height in cm) - (5 x age in years) + 5

Converting weight from pounds to kilograms:

Weight in kg = 196 pounds / 2.2

Weight in kg = 89 kg

Converting height from inches to centimeters:

Height in cm = 72 inches x 2.54

Height in cm = 182.88 cm

Resting energy needs = (10 x 89 kg) + (6.25 x 182.88 cm) - (5 x 65 years) + 5

Resting energy needs = 890 + 1143 - 325 + 5

Resting energy needs = 1713 calories per day

James's estimated resting energy needs are approximately 1713 calories per day.

5. To calculate James's daily protein requirement based on 1.0 gram per kilogram of his ideal body weight, we'll use his ideal body weight of 130 pounds:

Ideal body weight in kg = 130 pounds / 2.2

Ideal body weight in kg = 59 kg

Daily protein requirement = 1.0 gram/kg x 59 kg

Daily protein requirement = 59 grams of protein per day.

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Answer:

See explanation

Explanation:

A gene mutation can be defined as a permanent change in the DNA sequence that composes a gene, resulting in the observation that the sequence differs from what is obtainable in most individuals that make up the  population. Mutations range from a change in a single DNA building block (change in the sequence of base pairs) to changes in a large segment of a chromosome that includes multiple genes.

Mutation in the color of the wings of the housefly can be passed on to the next generation. If this trait enhances survival of the butterflies, the orange winged butterflies will eventual become extinct and become entirely replaced by the white winged butterflies. This implies that gene pool has been completely modified.

If same kind of mutation of pigmentation of wings is observed in the butterfly then they will result in a white butterfly.

If a gene of the DNA get damaged or changes in such a way that it also results in the changing of genetic message carried by that gene and this process is known by the name of mutation.

In the given question by breeding orange butterfly with a white butterfly in the latest generation of animals, notices a mutation in the genes that calls for pigment in the wings. If the mutation of pigmentation of wings is passed to the next generations with the  same changes in the gene of DNA, then after some generation we would get white butterfly.

Hence, if the same changes observed in the mutation of pigmentation of wings then we get a white butterfly.

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the index cards between the wooden blocks without touching the blocks and causing the tower to fall is to use a strategic setup and procedure that involves working together as a group. the tower in a stable manner. the wooden blocks should be placed one

the success of this procedure relies on careful planning and coordination among the group members. assigning specific tasks to each member and working together in a synchronized manner, the group can successfully remove all the index cards and wooden blocks without causing the tower to fall. It is important to be patient and move slowly throughout the procedure to avoid any accidents or mishaps.

Each pair of lab members should stand on opposite sides of the tower, facing each other. Both members of each pair will use their hands, with their fingers or a tool like a ruler, to gently but quickly remove their assigned index cards simultaneously. The key to success is coordination, so the group should count down together  ensure everyone removes th, the tower should remain standing as the blocks settle on top of one another, without any index cards between them.

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Answer:

I hope This will help you....and please mark me as Brilliant

Explanation:

The formula, H2O tels us that there are the same number of moles of Oxygen as there are of water. The (understood )molecular coefficient of H2O is 1. The (understood ) coefficient of O in the formula is also 1. The number of moles of oxygen is the same as the number of moles of water. This is moles of oxygen atoms. If the question wants moles of oxygen gas, O2, then it will be half as many I think that is what they want, so I would answer 3.1 moles of O2.

To calculate the time required for a current of 0.60 A to pass through a sulfuric acid solution and liberate 0.250 L of gas at STP, additional information, such as the Faraday's constant and the balanced chemical equation for the electrolysis of sulfuric acid, is needed.

To determine the time required for the current to pass through the solution, we can use Faraday's law of electrolysis, which states that the amount of substance liberated during electrolysis is directly proportional to the quantity of electricity passed through the electrolyte.

However, to apply Faraday's law, we need the balanced chemical equation for the electrolysis of sulfuric acid. Without this information, we cannot determine the stoichiometry of the reaction or the number of moles of gas liberated.

Once we have the balanced chemical equation, we can determine the stoichiometric ratio between the amount of electricity passed and the amount of gas liberated. The Faraday's constant (F) is used to convert the quantity of electricity (in coulombs) to moles of electrons.

With the stoichiometric ratio and the volume of gas (0.250 L) at STP, we can calculate the number of moles of gas liberated. Then, using the current (0.60 A) and Faraday's constant, we can calculate the quantity of electricity required.

Finally, by dividing the quantity of electricity by the current, we can determine the time required for the given current to pass through the solution and liberate 0.250 L of gas at STP.

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Answer:

las plantas

Explanation:

Las plantas son los seres vivos capaces de transformar energía luminosa utilizando agua y dióxido de carbono (CO₂) en energía química en forma de moléculas llamadas carbohidratos. El proceso a través del cual realizan esto se denomina fotosíntesis, y para ello requieren un pigmento de color verde denominado clorofila, el cual es necesario para captar la energía luminosa proveniente del Sol.

The strength of acids is influenced by the molecular structure of an acid by polarization of H-A bond and electronic effects like inductive, resonance .

The more the acidic strength, the more is the ability of an acid to donate H+ ions. So, the molecular structure of an acid is very important in determining the strength of the acid. Generally, if the size of an acid molecule increases, the acidic strength increase. If the size of the acid molecule decreases, the acidic strength decreases. There might be few exceptions. In conclusion, the strength of acids is greatly influenced by the molecular structure of an acid.

The following factors affect the acidic strength of acids :

In general, the key factors that determine the strength of an acid are the presence of polar bonds, the stability of the resulting conjugate base, and the ability to release hydrogen ions (protons).

Thus, the strength of acids is influenced by the molecular structure of an acid by polarization of H-A bond and electronic effects like inductive, resonance .

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Nitrogenous bases refer to the building blocks of DNA and RNA molecules. They are molecules that contain nitrogen and other elements. Four nitrogenous bases are found in DNA: adenine (A), guanine (G), cytosine (C), and thymine (T).These bases are divided into two categories: purines and pyrimidines.

Purines include adenine (A) and guanine (G), which are two-ringed structures. Pyrimidines include thymine (T) and cytosine (C), which are one-ringed structures. Purines always pair with pyrimidines in DNA, resulting in a consistent diameter for the DNA helix.Nitrogenous bases play a crucial role in encoding genetic information because they are responsible for holding the information in the DNA molecule. They can bind to one another via hydrogen bonding. The number of hydrogen bonds between base pairs determines their strength, which is essential in DNA replication and protein synthesis. For example, the pairing of guanine with cytosine is stronger than the pairing of adenine with thymine. Adenine pairs with thymine, while guanine pairs with cytosine, resulting in complementary base pairing.A single strand of DNA contains four types of nitrogenous bases, and each base has a complementary base. A strand of DNA is always composed of nucleotides, which are made up of a phosphate group, a sugar, and a nitrogenous base. Therefore, the four nitrogenous bases are essential building blocks of DNA molecules.

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mass and distance are the answers

Answer:

It should be the mass of each object and the distance between the centers of the two objects.

Answer:

1.Some smokeless tobacco products might expose people to lower levels of harmful chemicals than tobacco smoke, but that doesn’t mean these products are a safe alternative to smoking.

2.Tobacco smoke is made up of thousands of chemicals, including at least 70 known to cause cancer. These cancer-causing chemicals are referred to as carcinogens. Some of the chemicals found in tobacco smoke include.

Explanation:

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