In the Periodic Table below, shade all the elements for which the neutral atom has an outer electron configuration of ms^2nd^2, where n and m are integers, and m= n+1.

Answer:

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

\(n = \frac{N}{L} \\\)

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

\(n = \frac{4 \times {10}^{24} }{6.02 \times {10}^{23} } \\ = 6.644518...\)

We have the final answer as

Hope this helps you

toThis is a Valid statement about pressure .

What is pressure?

Pressure is continues physical force exerted on or against an object by something in contact with.

Sol-We know the idol gas equation, idyl gas equation. P v is equals to n r t. We can write the equation. As of the p is equal to n r upon v into p. Now n r upon v is equals to constant, is equals to constant. So we can write. P is equal to c into t. So now let us consider the ambient by the  condition, which is p not equals to 101325 p. A and t naught is equal to 90 degrees. Fahrenheit will convert this value kelvin and get 5048.37 kelvin. So the value of p, not anti. Note is 0 now from the modified idol equation. We are have p equal to c t, so we can write it as a p. Not is equal to c and t not so the we'll substitute the values 1013 to 5 p, a which is equal to c 2348.37 kelvin.

So here we get the value of c, which is equals to 43.147. So from this we can say that the change by  in pressure for the 10 degree temperature by the  drops so here delta equal to delta, which is equal to the 10 degrees fahrenheit. We can again convert this value in the kelvin and we get 260.93 kelvin, so delta to  p is equal to c into delta. This will be delap equals to 43.147, as we get the value of c and 2 red 60.93 kelvin p, so delta p is equal to 43.147 So from this we can say We can again convert this value in the kelvin by it  and we are get the 260.93 kelvin, so delta p is equal to c into delta. This will be delap equals to 43.147, as we get the value of c and 2 red 60.93 kelvin p, so delta p is equal to 43.147 and 260.93 kelvin upon 694.75 p s. I so we are finally get the value of delta p, which is equals to 1.63 p s. I.

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Answer:

Running to catch the bus would be it

Explanation:

because you're running for the others you barly move

Answer:I think it’s material chemistry

Explanation:

Answer:

Material chemistry.

Explanation:

Artificial bone and joint replacements is not environmental, it does not have anything to do with farming or such things, and physical chemistry has to do with chemical reactions which is not going on. This leaves materials chemistry.

HSO3^- is the conjugate base of H2SO3 (sulfurous acid). When it dissolves in water, it behaves as an acid. In other words, it donates a proton (H+) to a water molecule, producing hydronium ions (H3O+) and sulfite ions (SO32-). Therefore, the products that form when HSO3^- behaves as an acid in water are H3O+ (hydronium ion) and SO32- (sulfite ion).

The chemical reaction can be represented as follows:HSO3^- + H2O → H3O+ + SO32-This is an example of an acid-base reaction, in which HSO3^- is the acid and water is the base. The HSO3^- donates a proton to the water molecule, which acts as a base by accepting the proton to form H3O+.

This reaction is reversible, meaning that H3O+ can also act as an acid by donating a proton to the SO32- ion to reform HSO3^-.The sulfite ion (SO32-) is a weak base and can also react with water to form the hydroxide ion (OH-). This reaction can be represented as follows:SO32- + H2O → HSO3^- + OH-

Overall, when HSO3^- behaves as an acid in water, the products that form are H3O+ and SO32-. This reaction is an example of an acid-base reaction, in which the HSO3^- acts as an acid by donating a proton to water, which acts as a base.

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Answer:

Crust

Explanation:

Answer:

The crust

Explanation:

Answer:

\(\mathtt{ t_1-t_2= In(\dfrac{3}{y}) \times \dfrac{7.13 \times 10^8}{In2} \ years}\)

Explanation:

Given that:

The Half-life of \(^{235}U\) = \(7.13 \times 10^8 \ years\) is less than that of \(^{238} U = 4.51 \times 10^9 \ years\)

Although we are not given any value about the present weight of \(^{235}U\).

So, consider the present weight in the percentage of \(^{235}U\) to be  y%

Then, the time elapsed to get the present weight of \(^{235}U\) = \(t_1\)

Therefore;

\(N_1 = N_o e^{-\lambda \ t_1}\)

here;

\(N_1\) = Number of radioactive atoms relating to the weight of y of \(^{235}U\)

Thus:

\(In( \dfrac{N_1}{N_o}) = - \lambda t_1\)

\(In( \dfrac{N_o}{N_1}) = \lambda t_1\) --- (1)

However, Suppose the time elapsed from the initial stage to arrive at the weight of the percentage of \(^{235}U\) to be = \(t_2\)

Then:

\(In( \dfrac{N_o}{N_2}) = \lambda t_2\)  ---- (2)

here;

\(N_2\) =  Number of radioactive atoms of \(^{235}U\) relating to 3.0 a/o weight

Now, equating  equation (1) and (2) together, we have:

\(In( \dfrac{N_o}{N_1}) -In( \dfrac{N_o}{N_2}) = \lambda( t_1-t_2)\)

replacing the half-life of \(^{235}U\) = \(7.13 \times 10^8 \ years\)

\(In( \dfrac{N_2}{N_1}) = \dfrac{In 2}{7.13 \times 10^9}( t_1-t_2)\)      ( since \(\lambda = \dfrac{In 2}{t_{1/2}}\) )

∴

\(\mathtt{In(\dfrac{3}{y}) \times \dfrac{7.13 \times 10^8}{In2}= t_1-t_2}\)

The time elapsed signifies how long the isotopic abundance of 235U equal to 3.0 a/o

Thus, The time elapsed is  \(\mathtt{ t_1-t_2= In(\dfrac{3}{y}) \times \dfrac{7.13 \times 10^8}{In2} \ years}\)

The empirical formula of the original compound given the combustion analysis data is C₂H₄O

Mass of C = (12 / 44) × 8.802

Mass of C = 2.4 g

Mass of H = (2 / 18) × 3.604

Mass of H = 0.4 g

How to determine the mass of O

Mass of O = (mass of compound) – (mass of C + mass of H)

Mass of O = 4.406 – (2.4 + 0.4)

Mass of O = 1.606 g

Divide by their molar mass

C = 2.4 / 12 = 0.2

H = 0.4 / 1 = 0.4

O = 1.606 / 16 = 0.1

Divide by the smallest

C = 0.2 / 0.1 = 2

H = 0.4 / 0.1 = 4

O = 0.1 / 0.1 = 1

Thus, the empirical formula of the compound is C₂H₄O

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Answer:

Fatty foods become rancid due to the process of rancidity

Approximately 166.67 mL of water needs to be evaporated from 250 mL of 1 M Ca(OH)2 to make it 3 M.

The relationship between the initial and final concentrations and volumes must be taken into account.

Given: Initial concentration \((C^1) = 1 M Initial volume (V^1) = 250 mL\)

\((C^2) = 3 M final concentration\)

We can use the equation:

\(C^1 * V^1 = C^2 * V^2\)

Where:

\(V^2\)is the final volume of the solution

Rearranging the equation to solve for V2:

\(V^2 = (C^1 * V^1) / C^2\)

Substituting the given values:

\(V^2 = (1 M * 250 mL) / 3 M\)

\(V^2 = 250 mL / 3\)

\(V^2\) ≈ \(83.33 mL\)

To find the amount of water that needs to be evaporated, we subtract the final volume from the initial volume:

Amount of water to be evaporated = \(V^1 - V^2\)

Amount of water to be evaporated = 250 mL - 83.33 mL

Amount of water to be evaporated ≈ 166.67 mL

Therefore, approximately 166.67 mL of water needs to be evaporated from 250 mL of 1 M Ca(OH)2 to make it 3 M.

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Molecular compound- a chemical compound whose simplest units are molecules Ionic compound- composed of positive and negative ions that are combined so that the numbers of positive and negative charges are equal (3) Compound B has lower melting and boiling points than compound A. At the same temperature, compound B vaporizes faster than compound A.

Answer 1. U.S. Customary System/IMPERIAL SYSTEM  2. an instrument for measuring and sometimes recording the time or amount of something  3. The main difference between imperial and metric units is that metric units are more accessible to convert because those conversions require only multiplying or dividing by powers of 10. 4.The method used for measuring the small distance is by using the scales and the distance measured over long distance is by inch tape or measuring tape.

Explanation:

Answer:

1. The U.S. customary weight measurement units are ounces, pounds, and tons.

2. A meter is roughly 3 feet

3. While the Metric System simply moves the decimal point to convert between its measurements' prefixes, the English System requires a conversion ratio (or unit factor) to move between measurements.

4. A meter is roughly 3 feet. A few examples would be a meter stick (obviously) and a baseball bat.

5. To measure large distances between objects methods such as echo method, the laser method, sonar method, radar method, triangulation method and Parallax method are used. Or simply inches, feet, yards, meters, kilometers, etc.

6. Temperature is the quantity measured by a thermometer. Temperature is related to the average kinetic energy of atoms and molecules in a system. Absolute zero is the temperature at which there is no molecular motion. There are three main temperature scales: Celsius, Fahrenheit, and Kelvin.

7. Mass is anything that takes up space.

8. We can measure matter by its volume or its mass. We can also measure it by its temperature or its density. Volume measures how much space something takes up.

9. A derived unit is a unit that results from a mathematical combination of SI base units. Calculations involving derived units follow the same principles as other unit conversion calculations.

10. The weight of an object is a force. It is the force with which a body is attracted toward Earth or another celestial body. This means that when you are in space, away from Earth, objects do not weight anything since they do not feel gravitational attraction to the Earth. What objects have though in space is mass.

11. That is, the weight of an object is determined by the pull of gravity on it. Thus, an object's physical weight may change from place to place: if a body weighs 54 kg on Earth, its weight will be just over 9 kg on the Moon, since the Earth's gravitational force is six times stronger than the Moon's.

12. Thus more massive objects, of course, weigh more in the same location; the farther an object is from the Earth, the smaller is its weight. The weight of an object at the Earth's South Pole is slightly more than its weight at the Equator because the polar radius of the Earth is slightly less than the equatorial radius.

13. Something with lower mass will accelerate more for a given force. Something with higher mass will accelerate less. Now weight is the force of gravity on a mass, or on an object. So this is the force of gravity on an object.

Explanation:

I got this from all over the internet and some of them are even from my own head! Hope it helps!!

The answer responses to  the structures shown in the diagram are:

A. chromosomes

C. They would be the same.

B. They are in pairs because each one comes from a different parent.

The chromosomes are in pairs because humans have a diploid number of chromosomes, meaning they have two sets of chromosomes, one inherited from each parent.

The nucleus is important in eukaryotic cells and has many important parts that help the cell work properly. There are some parts inside cells called the nuclear membrane, nucleoplasm, nucleolus, and chromatin. Chromatin is made up of DNA and other proteins.

Every part of a person's body has the same genes, but the way they are organized can be different in different types of cells. The chromosomes in our skin cells might not be the same as the chromosomes in our muscle cells, even if they come from the same person.

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Identify the structures shown.

A. chromosomes

B. mitochondria

C. nuclei

D. vacuoles

C

Describe how the structures from this cell would compare to the structures in the nucleus of another body cell from the same person.

A. There would be longer.

B. They would be shorter.

C. They would be the same.

D. They would be different.

Describe how the structures from this cell would compare to the structures in the nucleus of another body cell from the same person.

A. There would be longer.

B. They would be shorter.

C. They would be the same.

D. They would be different.

Explain why the structures are in pairs.

A. They aren't in pairs.

B. They are in pairs because each one comes from a different parent.

C. This cell is making a copy of itself.

D. The cell always has 2 copies in case 1 is damaged.

I really hope this diagram helped you.

If you have further questions don't hesitate to ask :)

Answer: element 68 is Erbium, should there be a picture attached?

Explanation:

Digital cameras include a filter to block long wavelengths from reaching the sensor. If a filter cut-offs all wavelengths longer than 750 nm, then the maximum energy blocked would be 26.54 ×10⁻²⁰ J.

It can be defined as the number of cycles completed per second. It is represented in hertz and inversely proportional to the wavelength.

C = λ  ν

3 × 10⁸ = 750 × 10⁻⁹ × ν

ν = 3 × 10⁸ /  750 × 10⁻⁹

v = 4 × 10¹⁴ Hz

By using the Planck's energy formula

E = hν

where h is the Planck's constant with a value of 6.626×10⁻³⁴

E = 6.626×10⁻³⁴ ₓ  4 × 10¹⁴ Hz

  = 26.54 ×10⁻²⁰ J

Thus,  the maximum energy of the blocked radiation would be  26.54 ×10⁻²⁰ J .

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The "Wakanda speech," six weeks have passed, and the world is still in shock.

Thus, Global leaders and analysts were taken aback by King T'Challa's declaration at the United Nations General Assembly that the Kingdom of Wakanda is not a developing country of textiles, farms, and shepherds with a GDP per person of roughly $760 but rather a technological superpower and Wakanda speech.

The country's widespread employment of cutting-edge magnetic levitation trains, flying machines, opaque holograms, and spinal cord-healing beads has led to the coining of the phrase "uber-developed" nation.

The most watched video ever is currently "Welcome to the Future," an introduction video created by Wakanda's recently established Ministry of Foreign Affairs.

Thus, The "Wakanda speech," six weeks have passed, and the world is still in shock.

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Answer:

11.1 moles of CO2

Explanation:

2C2H6(g) + 7O2(g)⟶4CO2(g)+6H2O(g)

To find the number of moles of CO2 produced when 5.55 mol of ethane is burned in an excess of oxygen, use the stoichiometry of the reaction.

5.55 mol C2H6 x (4 mol CO2/2 mol C2H6) = 11.1 mol CO2

Therefore, 5.55 mol of ethane is burned in an excess of oxygen produces 11.1 moles of CO2.

The average speed of an object is the ratio of the distance to the time. Hence, the speed of the ball rolling 6 m in 2 seconds is 3 m/s. Therefore, student A is correct.

Speed is a physical quantity measuring the distance covered by an object within unit time. Speed is a scalar quantity. The rate of speed is called velocity. The unit of both quantities in common is m/s.

If an object covers more distance within small time, the object is said to have a greater speed. The speed of the object is the ratio of its change in distance to the change in time.

Given that, distance covered by the ball = 6 m

time taken = 2 seconds

speed = distance/ time

speed = 6 m / 2 s= 3 m/s

Therefor, the speed of the ball is 3 m/s and student A is correct.

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Answer:

conductivity

Explanation:

Answer:

She say that im cool

I'm like "yeah thats true"

I believe in G-O-D

Dont believe in T-H-O-T

Explanation:

Answer:

rolling in the deep

Explanation:

By using the ideal gas law and Avogadro's number, we find that there are approximately 6.72 × 10^22 molecules of CO2 in 2.5 L at STP.

To determine the number of molecules of CO2 in 2.5 L at STP (Standard Temperature and Pressure), we can use the ideal gas law and Avogadro's number.

Avogadro's number (N_A) is a fundamental constant representing the number of particles (atoms, molecules, ions) in one mole of substance. Its value is approximately 6.022 × 10^23 particles/mol.

STP conditions are defined as a temperature of 273.15 K (0 °C) and a pressure of 1 atmosphere (1 atm).

First, we need to convert the volume from liters to moles of CO2. To do this, we use the ideal gas law equation:

PV = nRT,

where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature in Kelvin.

Since we have STP conditions, we can substitute the values:

(1 atm) × (2.5 L) = n × (0.0821 L·atm/(mol·K)) × (273.15 K).

Simplifying the equation:

2.5 = n × 22.4149.

Solving for n (the number of moles):

n = 2.5 / 22.4149 ≈ 0.1116 moles.

Next, we can calculate the number of molecules using Avogadro's number:

Number of molecules = n × N_A.

Number of molecules = 0.1116 moles × (6.022 × 10^23 particles/mol).

Number of molecules ≈ 6.72 × 10^22 molecules.

Therefore, there are approximately 6.72 × 10^22 molecules of CO2 in 2.5 L at STP.

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Answer:

A. The heat needed to raise the temperature of 1 g of a substance 1°C.

Explanation:

how this has helped you

Answer:

cancer

Explanation:

causes hair loss