an element y has the ionization energy as follows:

ei1 = 578 kj/mol
ei2 = 1.817 kj/mol
ei3 = 2.745 kj/mol
ei4 = 11.575
kj/mol based on the data above, then the element is .....

3.7 mol Mg

See image:

Hope this helps,

Jeron

:- )

24.3 g of magnesium is required for two moles of the product. . Therefore, 356.3 grams of magnesium (Mg) are required to produce 40.0 grams of boron (B) through the reaction

A balanced chemical equation represents the correct stoichiometry of all the reactants and products.

Based on the balanced chemical equation above, 2 moles of Mg are required to produce 1 mole of B2H6, and 1 mole of B2H6 produces 2 moles of MgB2.

Using the molar masses of Mg (24.31 g/mol) and B (10.81 g/mol), we can calculate the mass of Mg required to produce 40.0 g of B:

1 mole of B = 2 moles of Mg x (24.31 g/mol) = 48.62 g of Mg

40.0 g of B x (1 mol B / 10.81 g) x (2 mol Mg / 1 mol B) x (24.31 g / 1 mol Mg) = 356.3 g of Mg

Therefore, 356.3 grams of magnesium (Mg) are required to produce 40.0 grams of boron (B) through the reaction .

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The reaction related to your question is :

Mg + B2H6 → 2 MgB2 + 3 H2.

Answer: Use the formula F= k q1q2/r^2 where k= 1/4π€ and it's value in air is 9× 10^9.

q1=q2= 2.4×10^-6C

F= 0.5N

You will get the value of r^2 and then will have to find the squre root of that value.

Explanation:

Answer:

Constrictive

Explanation:

Answer:

d) group 18

Explanation:

Group 18 on the periodic table consists of noble gasses, which do not chemically interact with other elements.

Answer: it has full valence shells

Explanation: Hope this is it

Answer:

Neon, along with helium, argon, krypton and xenon, make up the group known as noble gases. These are the most stable and least reactive elements due to having full valence shells (the outer shell has the max number of electrons, two for helium, eight for the rest).

Explanation:

Hope it helps

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Tori

this was great and fun to do

Ion - dipole attraction are weaker than ionic bond. A large number of ion - dipole attractions can act collectively to disrupt on ionic bond.

An ion-dipole interaction is the intermolecular force of attraction between a charge ion (cation or anion) and a molecule. It is found commonly in the solution where ionic compounds dissolve in polar solvents.

onic bond, also called electrovalent bond, type of linkage formed from the electrostatic attraction between oppositely charged ions in a chemical compound. Such a bond forms when the valence (outermost) electrons of one atom are transferred permanently to another atom.

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Answer:

Polar easterlies are dry, cold prevailing winds that blow from the east. They emanate from the polar highs, areas of high pressure around the North and South Poles. Polar easterlies flow to low-pressure areas in sub-polar regions. Westerlies. Westerlies are prevailing winds that blow from the west at midlatitudes.

Explanation:

I hope this helps

The ion that silver (Ag) forms is commonly known as the silver ion or the Ag+ ion. The charge on the silver ion is +1, indicating that it has lost one electron to achieve a stable electron configuration.

The electron configuration for the silver ion (Ag+) can be determined by considering the electron configuration of neutral silver (Ag). The electron configuration of neutral silver is [Kr] 4d^10 5s^1.

When silver loses one electron to form the Ag+ ion, the electron configuration changes. Since the electron being lost comes from the 5s orbital, the electron configuration of the Ag+ ion can be written as [Kr] 4d^10.

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Answer:

See explanation

Explanation:

The overall charge on ClO3−  is shown on the image attached to this answer. If we calculate the formal charges on each atom in the structure, we will notice that one oxygen atom has a formal charge of -1 while all other atoms have a formal charge of zero.

This gives the compound an overall charge of -1 as shown in the image attached to this answer. This is the correct Lewis structure for the compound ClO3− .

The molecule has a formal charge of -1 on all oxygen atoms, and +2 on the Cl atom.

When all the electrons of an atom are shared equally, the charge attained by the atom is known as a formal charge.

The formal charge can be calculated as:

Formal charge = valence electron - non-bonding electron - \(\rm \dfrac{bonding\;electron}{2}\)

In the molecule, the formal charge of Oxygen = -1.

In the molecule, the formal charge of Chlorine = +2

The oxygen atom has 8 electrons, in which 2 are shared in the bond formation, and 6 electrons are valence electrons.

The chlorine atom has 7 valence electrons in which 6 electron pairs are shared with the oxygen atom, and 1 lone pair has been available with Cl.

The structure of \(\rm ClO_3^-\) molecule has been given in the image attached. The image shows the available lone pairs and the bonding in the structure.

Thus, the molecule has a formal charge of -1 on all oxygen atoms, and +2 on the Cl atom.

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Answer:

180°

Explanation:

You are starting at 125° W and ending at 55° E.

It might be easier to find the distance travelled by using a number line.

Numbers west are negative and numbers east are positive.

Start at -125 and go in jumps of 10 until you reach +55.

You make 18 jumps of 10° each for a total of 180°.

You have travelled a distance of 180°.

What you have just done is equivalent to saying:

distance travelled = end - start = 55° - (-125°) = 55° + 125° = 180°  

The inspector shall not report on any issue that could exist in the future but only those that currently exist.

The role of an inspector is to assess and report on the current condition or state of a specific subject, such as a property, system, or process. Inspectors are not responsible for predicting or reporting on potential issues that may arise in the future.

Instead, their focus is on identifying and documenting issues that are currently present at the time of the inspection. This ensures that the inspection report provides an accurate representation of the existing conditions, allowing the recipient of the report to make informed decisions based on the current state of affairs.

By limiting their scope to present issues, inspectors provide a snapshot of the situation at hand rather than speculating on future possibilities.

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Answer:

B their larger size . this is right

Answer:

The answer is B. here is proof. Plz mark brainliest.

Explanation:

Answer:

Explanation:

The density of a substance can be found by using the formula

\(density = \frac{mass}{volume} \\\)

From the question

mass = 18.015 g

volume = 15 cm³

We have

\(density = \frac{18.015}{15} \\ = 1.000833333...\)

We have the final answer as

Hope this helps you

The furanose form of fructose is generated by formation of a hemiketal involving the attack of the hydroxyl group on carbon  2  with carbon 5  .

Option 1 is correct..

In its linear form, fructose has a ketone functional group on carbon 2 and five hydroxyl groups. In aqueous solutions, fructose can undergo a reversible intramolecular reaction between the ketone group and one of the hydroxyl groups, resulting in the formation of a cyclic hemiketal ring.

The furanose form of fructose is an important carbohydrate molecule that plays a key role in many biological processes, such as energy metabolism and signal transduction. It is also used as a sweetener in various food and beverage products. Correct option is: 1.

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-- The complete question is, Complete the statement: The furanose form of fructose is generated by formation of a hemiketal involving the attack of the hydroxyl group on carbon _____ with carbon _____.

1. 5; 2

2. 2; 6

3. 6; 1

4. 6; 2 --

Answer: Concentration of the acid is 0.551 M.

Explanation:

Given: \(V_{1}\) = 71.1 mL,      \(M_{1}\) = 0.695 M

\(V_{2}\) = 89.7 mL,           \(M_{2}\) = ?

Formula used to calculate the concentration of acid is as follows.

\(M_{1}V_{1} = M_{2}V_{2}\)

Substitute the values into above formula as follows.

\(M_{1}V_{1} = M_{2}V_{2}\\0.695 \times 71.1 mL = M_{2} \times 89.7 mL\\M_{2} = 0.551 M\)

Thus, we can conclude that concentration of the acid is 0.551 M.

The correct answer is the amount of sodium chloride needed to make this eye solution isotonic with tears is approximately 1.85 grams. Rounding it up to the nearest whole number gives us the answer as 2. Hence, the correct option is 22.

The given solution is a hypotonic solution as the solution's tonicity is lower than that of the tears. The tears contain 0.9% w/v of NaCl, which is isotonic with tears. So, to make the given solution isotonic, the amount of sodium chloride needs to be added.

The concentration of NaCl in tears is 0.9% w/v. Additional Information: We know that % w/v is the amount of solute present in grams per 100 ml of the solution. Therefore, 0.9% w/v means 0.9 grams of NaCl is present in 100 mL of tears.

To make 30 ml of isotonic solution, we can use the following formula: Equivalent weight of NaCl = 58.5/2 = 29.25 (as NaCl ionizes to give Na+ and Cl- ions)Moles of NaCl required to make 30 ml isotonic solution = 0.9 × 30 / 1000 = 0.027Moles of Na+ and Cl- ions present in 30 mL of isotonic solution = 2 × 0.027 = 0.054

A number of grams of NaCl needed to prepare 30 mL of isotonic solution is calculated as follows:0.054 g = (0.027 x 29.25 x X) / 1000Where X is the amount of NaCl required to make 30 mL isotonic solution. Solving this equation gives us: X = 1.85 g (approx). Therefore, the amount of sodium chloride needed to make this eye solution isotonic with tears is approximately 1.85 grams. Rounding it up to the nearest whole number gives us the answer as 2. Hence, the correct option is 22.

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The amount of drug in the body is 4600 mg. The amount of drug in the plasma is 3 mg. The amount of drug in the tissues is 4597 mg.

The amount of drug in the body can be calculated by multiplying the volume of distribution (Vd) by the plasma concentration. In this case, the amount of drug in the body would be 4600L x 1 mg/L = 4600 mg.

The amount of drug in the plasma can be calculated by multiplying the plasma concentration by the volume of the plasma. In this case, the amount of drug in the plasma would be 1 mg/L x 3L = 3 mg.

The amount of drug in the tissues can be calculated by subtracting the amount of drug in the plasma from the total amount of drug in the body. In this case, the amount of drug in the tissues would be 4600 mg - 3 mg = 4597 mg.

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It moves to a lower energy level.

When electrons in an atom move from a lower energy level to a higher energy level. Then these higher energy electrons release their "extra" energy in the form of a photon which is a form of light and move back down to their original energy level. while on the other hand, when energy electrons absorb energy in the form of a photon they move to a higher energy level from their original energy level.

We can say that electron in an excited state release energy and comes to a lower state. Then the electron releases a photon. The energy present in that photon is related to the difference between the two levels or states in which the electron moves.

So we can conclude that an electron emits energy, it moves to a higher energy level.

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Answer:

Yes

Explanation:

The expansion of the universe is the increase in distance between any two given gravitationally unbound parts of the observable universe with time. It is an intrinsic expansion whereby the scale of space itself changes. The universe does not expand "into" anything and does not require space to exist "outside" it.

The order is: a. Linear, b. Trigonal planar, and d. Trigonal bipyramidal.

To rank the electron-pair geometries by increasing steric number, we will first determine the steric number of each geometry and then arrange them in ascending order.
a. Linear: The steric number for a linear geometry is 2, as it consists of 2 electron pairs (1 central atom with 2 bonded atoms).
b. Trigonal planar: The steric number for a trigonal planar geometry is 3, as it consists of 3 electron pairs (1 central atom with 3 bonded atoms).
c. Trigonal bipyramidal: The steric number for a trigonal bipyramidal geometry is 5, as it consists of 5 electron pairs (1 central atom with 5 bonded atoms).

Based on the above information, we can rank the electron-pair geometries by increasing steric number as follows:
1. Linear (Steric number 2)
2. Trigonal planar (Steric number 3)
3. Trigonal bipyramidal (Steric number 5)

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Answer: Answer is #3. sodium, carbon, hydrogen, and oxygen

Explanation: Baking soda is sodium bicarbonate, NaHCO3, meaning that each molecule of sodium bicarbonate contains one atom of sodium, one of hydrogen, one of carbon, and three of oxygen.

Bond orders are calculated by dividing the total number of electrons in bonding orbitals by the total number of bonds.

The Lewis structures of ethane and ethene can be used to predict the bond orders in these molecules. Ethane has a single bond between the carbon atoms, which indicates a bond order of one.

Ethene has a double bond between the carbon atoms, which indicates a bond order of two. The calculated bond orders for ethane and ethene are the same as those predicted by their Lewis structures.

The Lewis structure of ethyne can also be used to predict the bond order. It has a triple bond between the carbon atoms, which indicates a bond order of three. However, the calculated bond order for ethyne is less than three. This is because the electrons in the triple bond are spread out over a larger region, making the bond weaker than expected based on the Lewis structure.

The calculated bond order for ethyne is approximately 2.5, which is lower than the predicted bond order of three based on the Lewis structure.

In summary, the calculated bond orders for ethane and ethene are the same as those predicted by their Lewis structures. The calculated bond order for ethyne is lower than the predicted bond order of three based on the Lewis structure.

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Answer:

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

Explanation:

Understanding the properties of acids and bases is critical for everyday life and several career fields.

Topic: Acids and Bases

Acids and bases are two major branches of chemistry that deal with the behavior of acids and bases in solutions and the properties of their aqueous solutions. Acids and bases can be found all around us, from the foods we eat to the products we use in our daily lives. The pH scale is used to measure the acidity or basicity of solutions.

Solutions with pH less than 7 are acidic, while solutions with pH greater than 7 are basic. A solution with a pH of 7 is neutral.

A few examples of acids and bases in everyday life are:

Acids

Vinegar: Acetic acid is a weak acid found in vinegar.

Citrus fruits: Citric acid is a weak acid found in citrus fruits.

Carbonated drinks: Carbonic acid is a weak acid found in carbonated drinks.

Stomach acid: Hydrochloric acid is a strong acid found in the stomach.

Base

Soap: Sodium hydroxide is a strong base found in soaps.

Ammonia: Ammonia is a weak base found in cleaning products.

Antacids: Antacids are basic compounds used to neutralize stomach acid.

So, in everyday life, people can observe and apply the properties of acids and bases while cooking, cleaning, and consuming food and drinks. The use of acids and bases is also critical in several professions, including healthcare, agriculture, and manufacturing.

In healthcare, pH regulation is critical for maintaining homeostasis in the body. In agriculture, pH regulation is critical for soil fertility and plant growth. In manufacturing, acids and bases are used in the production of various products.

Therefore, understanding the properties of acids and bases is critical for everyday life and several career fields.

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When only 1 mol of oxygen was intended to be produced, a process instead yields 4.93 L of oxygen. The percent yield of the reaction is 493%.

Percent yield is a measure of how much of the desired product is produced in a chemical reaction. It is calculated by comparing the actual yield of a product to the theoretical yield, which is the amount of product that would be produced if the reaction were 100% efficient.

To calculate the percent yield, you can use the formula:

= percent yield

= (actual yield / theoretical yield) x 100%

The theoretical yield of a reaction is calculated by multiplying the number of moles of reactant used by the stoichiometry of the reaction. In this case, the reaction is supposed to produce 1 mol of oxygen, which is the theoretical yield. To calculate the actual yield, we can use the Ideal gas law PV = nRT, where P is the pressure, V is the volume, n is the number of mol. Since we know that V = 4.93 L, we can use this information to find n:

= n

= (PV) / RT

The actual yield is 4.93 L of O2 or 4.93 L of any gas at STP (Standard Temperature and Pressure) is equivalent to 4.93 moles of O2.

Then we can use this information to calculate the percent yield:

= percent yield

= (actual yield / theoretical yield) x 100%

= (4.93 moles O2 / 1 mole O2) x 100%

= 493%

So, the percent yield of the reaction is 493%.

It's important to note that a percent yield of greater than 100% is usually an indication of an error in the measurement or calculation of the actual yield, or it could be an indication that the theoretical yield is incorrect.

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The actual formula for volume for a cube is the length multiplied by the width and then multiplied by the height. Since all three measurements are the same, the formula results in the measurement of one side cubed. For the example, 5^3 is 125 cm^3. Multiply the volume by the known density, which is the mass per volume.

Molar mass is the mass of one mole of a substance. Therefore, the molar mass of trans-9-(2-phenylmethyl)anthracene is 356.44 g/mol.

The substance in question is trans-9-(2-phenylethenyl)anthracene. This organic compound can be represented as C28H20. The molar mass of trans-9-(2-phenylethenyl)anthracene is therefore calculated as follows:Step 1Determine the molar mass of carbon (C) and hydrogen (H). The atomic mass of carbon is 12.01 g/mol, and the atomic mass of hydrogen is 1.008 g/mol. Step 2Calculate the total molar mass of carbon and hydrogen in the compound. Multiply the atomic mass of carbon by the number of carbon atoms in the compound (28), and multiply the atomic mass of hydrogen by the number of hydrogen atoms in the compound (20).Step 3Add the molar masses of carbon and hydrogen to get the total molar mass of the compound. 12.01 × 28 + 1.008 × 20 = 336.28 + 20.16 = 356.44 g/molTherefore, the molar mass of trans-9-(2-phenylethenyl)anthracene is 356.44 g/mol.

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