At what temperature is the volume of the gas 4.00 L if the pressure is kept constant.

If a bullet train travelled a distance of 246 miles in 2 hours, then the average speed of train is 122.45 miles/h.

The amount of ground an object covers in a given amount of time is known as its speed in physics. Alternatively put, speed refers to the rate of movement of an object. The length of the unit time can be in seconds, hours, days, or years. It informs us of an object's motion's speed or slowness. Quantity is a scalar, and speed is it. The SI unit of speed is the m/s.

The majority of things and bodies don't move at a constant speed, like the MRT train, which begins at a station at rest, accelerates until it reaches constant speed (also called cruising speed), then slows down to a stop at the next station. Thus, defining average speed <v> as opposed to actual speed v is more beneficial.

We know that average speed = sum of  distance/ sum of time

Here given that distance is 245 miles and time is 2 hours

So, Speed is

s = d/t

  =  245/2

  = 122.5 miles/h

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Answer:

Moving water helps plant's and islands form and grow. Which shapes earth.

The mass of the compound required in the given number of moles is 70.38 g.

The given parameters;

The mass of the compound that will be required in the number of moles is the product of the molecular weight of the compound and its number of moles available.

The mass of the compound required in the given number of moles is calculated as follows;

mass = moles x molecular weight

mass = 0.51 x 138

mass = 70.38 g

Thus, the mass of the compound required in the given number of moles is 70.38 g.

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Neon

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Neon is the element who is having complete electrons in its both the shells

it's atomic mass is 10

in its first shell it has 2 electrons and in 2nd shell it has 8 electrons

it's valency is 0

Hope it helps

Answer:

Momentum

Explanation:

If there is more mass, there is more momentum and if there is more speed there is more momentum. The formula for momentum is mass x speed.

a) The shape functions of the element are Ni=1−0.238x−0.108yNj=0.238x−0.038y−0.965Nk=0.103x+0.146y−0.249.

b) The temperature at the point (60,40) inside the element is T(x,y)=244.3°F.

(a) The shape functions of the triangular element are as follows:Ni = 1 – 0.238x – 0.108yNj = 0.238x – 0.038y – 0.965Nk = 0.103x + 0.146y – 0.249

(b) To calculate the temperature at the point (x,y) = (60,40) in inside the element, we need to use the shape functions and nodal temperatures. Using these values in the formula, we get:T(x, y) = N1T1 + N2T2 + N3T3= 210 + 30 (–0.238x – 0.108y) + 270 (0.238x – 0.038y – 0.965) + 250 (0.103x + 0.146y – 0.249)= 244.3 °F

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Answer:

1.1 × 10²⁴ atoms Mg

General Formulas and Concepts:

Atomic Structure

Stoichiometry

Explanation:

Step 1: Define

Identify

[Given] 1.8 mol Mg

[Solve] atoms Mg

Step 2: Identify Conversions

Avogadro's Number

Step 3: Convert

Step 4: Check

Follow sig fig rules and round. We are given 2 sig figs.

1.08396 × 10²⁴ atoms Mg ≈ 1.1 × 10²⁴ atoms Mg

Answer:  1.0836 * 10^24 atoms

This value is approximate

===========================================================

Explanation:

1 mole = 6.02*10^23 atoms approximately

This applies to any element.

Multiply both sides by 1.8 and we get...

1 mole = 6.02*10^23 atoms

1.8*1 mole = 1.8*6.02*10^23 atoms

1.8 mole = 10.836*10^23 atoms

1.8 mole = (1.0836*10)*10^23 atoms

1.8 mole = 1.0836 * 10^(1+23)

1.8 mole = 1.0836 * 10^24 atoms

11.9% is the percent composition of nitrogen in lidocaine. The mass percent of a solution is represented as the grams of the either by grams of solution.

The Mass percent formula provides written to solve for the molar mass as well as the mass of each element in one mole of the compound. With these masses, you'll calculate the mass proportion of each element.

The mass percent of a solution is represented as the grams of the either by grams of solution, and multiplied by hundred to obtain a percentage.

mass percentage of nitrogen =(mass of nitrogen/molar mass of  C\(_{14}\)H\(_{22}\)N\(_2\)O)×100

mass percentage of nitrogen =(28/234.34)×100 = 11.9%

Therefore, 11.9% is the percent composition of nitrogen in lidocaine.

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Answer:

C^4OH^10

Explanation:

Answer:

u can search it

Explanation:

please mark me as a brainlist

The structure that will be formed is: 2-methyl, hexan-2-ol.

According to the query, the main chain has one distinct methyl group coming off of it. As a result, if we take away one carbon from the formula, we are left with six carbons, indicating that our structure has a six-carbon main chain.

CH₃ CH₂ CH₂ CH₂ CH₃

Additionally, it is said that we possess two tertiary alcohols. However, as the formula is C₇H₁₆O, only one more alcohol group can be added. When the functional group -OH is joined to a tertiary carbon, which is carbon with only one bond, the result is a tertiary alcohol. Since adding methyl groups and alcohol to the same carbon is the only way to convert our 6-carbon chain into tertiary alcohol, we are unable to add the -OH to either end of the chain. Therefore, in our 6-carbon chain, the 2-, 3-, 4-, or 5-carbon must receive the -OH:

CH₃-CH-CH₂-CH₂-CH₂-CH₃

         |

        OH

Our structure now comprises 6 carbons, a 6-carbon chain, and tertiary alcohol. We will extend our 6-carbon chain by one methyl group. We require a distinct methyl group that extends from the initial 6-carbon chain. We are limited to placing this methyl group on the 2-carbon. As a result, the structure we seek is:

   CH₃

        |

CH₃-C—CH₂- CH₂- CH₂-CH₃

        |

      OH

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Answer:

313.2 g of \({K_{2} }S O_{4}\)  must be added to 1.20 liters of water to produce a 1.50 molar solution.

Explanation:

What is molarity?

According to the given question,

Solution :

∴ Number of moles of solute, here, \({K_{2} }S O_{4}\)

= molarity x volume of the solution

= 1.20 x  1.50 = 1.8

∴ Mass of 1.8 moles of \({K_{2} }S O_{4}\) = 1.8 x molar mass of   \({K_{2} }S O_{4}\)  

Now the molar mass of \(K_{2} SO_{4}\)

= (Gram atomic mass of K x 2) + (Gram atomic mass of S) + (Gram atomic mass of O x 4)

= (39x2) + 32 + (16 x 4) g

= 174 g.

∴ Mass of 1.5 moles of \({K_{2} }S O_{4}\)

= 1.8 x molar mass of   \({K_{2} }S O_{4}\)  

= 1.8 x 174 g

= 313.2 g.

Thus, 313.2 g of \({K_{2} }S O_{4}\)  must be added to 1.20 liters of water to produce a 1.50 M solution.

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Explanation:

Second answer is the correct one.

The activity coefficient of h is 0.05

The ph of the solution is 2.08

To find the activity coefficient, apply the concept of ionic equilibrium

h( activity coefficient)= 1/2CZ²

C is the concentration of species

Z is the charge on individual species

h= 1/2( 0.01 x1²+ 0.04x (-1)²+0.01 x1²+0.04x (-1)²)

h= 0.05

For the pH of the solution, apply the formula

pH= -log( H⁺x0.83)

pH = - log(0.01x0.83)

= 2.08

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Answer:

The answer is Boron

Explanation:

The model shows that all three isotopes have similar arrangements and numbers of protons and electrons. The differences are due to varying numbers of neutrons in the nuclei.

Answer:

no each of them i will do but a single for your understanding so you can do by your own

here first one 8.1755×10^4 so 81755 the answer

The limiting reactant is oxygen gas (O2) because it will run out first and limit the amount of product that can be formed.

To determine the limiting reactant in this reaction, we'll first look at the balanced chemical equation:

2H₂(g) + O₂(g) → 2H₂O(l)

Now, we'll compare the available moles of each reactant to their stoichiometric ratios in the equation. We have 5.00 moles of H₂ and 1.20 moles of O₂.

For H₂, divide the available moles by its stoichiometric coefficient (2): 5.00 mol / 2 = 2.50 mol
For O₂, divide the available moles by its stoichiometric coefficient (1): 1.20 mol / 1 = 1.20 mol

Since 1.20 mol of O₂ is less than 2.50 mol of H₂, O₂ is the limiting reactant in this reaction.

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We can calculate the mass of Ni2O3 produced using the number of moles and molar mass of Ni2O3:mass of Ni2O3 = 0.81 mol × 74.6928 g/mol = 60.48 g Therefore, 60.48 g of nickel (II) oxide is produced.

The balanced chemical equation is shown below:4 Ni + 3 O2 → 2 Ni2O3Therefore, we need to determine the amount of nickel (II) oxide produced when 155 g of nickel reacts with 39 g of oxygen gas.

We can use the mole ratios from the balanced chemical equation to determine the amount of nickel (II) oxide produced. The mole ratio of Ni to Ni2O3 is 4:2 or 2:1. This means that for every 2 moles of Ni2O3 produced, we need 4 moles of Ni. Similarly, the mole ratio of O2 to Ni2O3 is 3:2.

This means that for every 2 moles of Ni2O3 produced, we need 3 moles of O2.Using the given masses and molar masses of each substance, we can calculate the number of moles of each substance present: moles of Ni = 155 g / 58.6934 g/mol = 2.64 mol moles of O2 = 39 g / 32 g/mol = 1.22 mol The mole ratio of Ni to Ni2O3 is 2:1, which means that the number of moles of Ni2O3 produced is half the number of moles of Ni.

Therefore, the number of moles of Ni2O3 produced is: moles of Ni2O3 = 2.64 mol / 2 = 1.32 mol.  The mole ratio of O2 to Ni2O3 is 3:2, which means that the number of moles of Ni2O3 produced is two-thirds the number of moles of O2. Therefore, the number of moles of Ni2O3 produced is: moles of Ni2O3 = 1.22 mol × (2/3) = 0.81 mol.

Now we can calculate the mass of Ni2O3 produced using the number of moles and molar mass of Ni2O3:mass of Ni2O3 = 0.81 mol × 74.6928 g/mol = 60.48 g Therefore, 60.48 g of nickel (II) oxide is produced.

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Answer:Question

Select the correct answer. Sami was blowing soap bubbles in his room where the temperature was 23 °C and the pressure was constant. He blew a soup bubble of volume 45 mL. The bubble suddenly escaped from the window where the temperature outside was 12 °C. Explain what will happen to the soap bubble? The volume of the soap bubble will increase to 46.73 mL. The volume of the soap bubble will increase to 86.25 mL. The volume of the soap bubble will decrease to 23.47 mL. The volume of the soap bubble will decrease to 43.33 mL.​

Explanation:

Question

Select the correct answer. Sami was blowing soap bubbles in his room where the temperature was 23 °C and the pressure was constant. He blew a soup bubble of volume 45 mL. The bubble suddenly escaped from the window where the temperature outside was 12 °C. Explain what will happen to the soap bubble? The volume of the soap bubble will increase to 46.73 mL. The volume of the soap bubble will increase to 86.25 mL. The volume of the soap bubble will decrease to 23.47 mL. The volume of the soap bubble will decrease to 43.33 mL.​

The power can differ even if the work done is the same, depending on the time taken to perform the work.

If two persons do the same amount of work, they can have different power values. Power is defined as the rate at which work is done or the amount of work done per unit time. It is calculated by dividing the work done by the time taken to do that work.

Power = Work / Time

Even if the work done is the same, the time taken to complete that work can vary between individuals. Therefore, if one person completes the work in less time compared to the other person, their power will be higher. Conversely, if one person takes more time to complete the same amount of work, their power will be lower.

For example, if person A and person B both lift a weight of 100 kilograms to a certain height, and person A completes the task in 10 seconds while person B takes 20 seconds, person A will have a higher power because they completed the work in less time.

Thus, the power can differ even if the work done is the same, depending on the time taken to perform the work.

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Answer:yes

Explanation:depending on the chemical properties and amount of the chemical and the state of matter and amount of mass

Answer: as the number of predators increases, more prey are captured. as a result the prey population starts to decrease.

The mass of sulfuric acid formed from 3.20 moles of sulfur dioxide can be calculated by using the stoichiometry of the balanced chemical equation and the molar mass of sulfuric acid.

According to the balanced chemical equation 2SO2 + 2H2O + O2 -> 2H2SO4, we can see that for every 2 moles of sulfur dioxide (SO2), we obtain 2 moles of sulfuric acid (H2SO4). This means that the mole ratio between sulfur dioxide and sulfuric acid is 2:2 or 1:1.

Given that we have 3.20 moles of sulfur dioxide, we can conclude that the same number of moles of sulfuric acid will be formed. Therefore, the mass of sulfuric acid formed can be determined by multiplying the number of moles of sulfuric acid by its molar mass.

The molar mass of sulfuric acid (H2SO4) can be calculated by adding up the atomic masses of its constituent elements: 2 hydrogen (H) atoms, 1 sulfur (S) atom, and 4 oxygen (O) atoms.

By multiplying the molar mass of sulfuric acid by the number of moles (3.20 moles), we can find the mass of sulfuric acid formed from the given amount of sulfur dioxide.

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The corrcet answer is option D: About half of the buffer molecules are dissociated.

Buffers work best when about half of the buffer molecules are dissociated.

In chemistry, an aqueous solution that can resist change in pH when acidic or basic substances are added to it is called a buffer solution.

The main components of a buffer are a weak acid and a conjugate base and vice versa.

When an acid or a base is added to it, it cancels out its effects and makes the solution neutral.

In this way, it maintains a very stable pH of the solution under all conditions.

For a chemical reaction, buffers are really important and handy solutions.

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Conevrting 1.9 kilojoule(kJ) into:

a) 1.9 kJ = 450 cal

b) 1.9 kJ = 1900 J

Similar to how kilometers measure distance, a kilojoule is a unit used to measure energy. Some nations continue to utilize the Calories (Cal) system, which was once used to quantify food energy. These are the conversions: 1 kJ = 0.2 Cal.

A calorie is a unit of energy measurement. Typically, the energy content of meals and beverages is determined in terms of calories. You must consume fewer calories each day than your body uses up in order to lose weight. Calories are necessary for human survival. Without energy, the body's cells would die, the heart and lungs would stop pumping, and the organs wouldn't be able to carry out essential life tasks. Through their consumption of food and liquids, people can absorb this energy.

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Answer:

Li and CL

Explanation:

I took the test