which of the following elements has the largest third ionization energy (ie3)? group of answer choices li be ne b al

Answer:

Explanation:

Here, we want to count the number of atoms of each element

Let us start with the reactant side

There are 2 hydrogen atoms (symbol H)

There are 2 chlorine atoms (symbol Cl)

There are 2 Zinc atoms (symbol Zn)

For the product side:

There are 2 Zinc atoms (dark circle)

There are 2 Chlorine atoms (Symbol Cl)

There are 2 hydrogen atoms (symbol H)

We have the equation of the model as:

If Q = Kp, the reaction is at equilibrium. If Q < Kp, the reaction will proceed to the right (toward products). If Q > Kp, the reaction will proceed to the left (toward reactants).

To determine whether the reaction mixture is at equilibrium at 450 K, we need to calculate the reaction quotient (Q) and compare it to the equilibrium constant (Kp). The reaction for the given system is:
\(PCl_5 (g) = PCl_3 (g) + Cl_2 (g)\)
1. Write the expression for the reaction quotient (Q):
\(Q = (P_{PCl_3} * P_{Cl_2}) / P_{PCl_5}\)
where \(P_{PCl_3}\), \(P_{Cl_2}\), and \(P_{PCl_5}\) are the partial pressures of \(PCl_3\), \(Cl_2\), and \(PCl_5\), respectively.
2. Plug in the given values:
Q = (0.21 atm * 0.41 atm) / (0.59 atm)
3. Calculate Q:
Q ≈ 0.146
4. Compare Q to Kp:
To determine whether the reaction mixture is at equilibrium, compare Q to the equilibrium constant (Kp) for the reaction at 450 K. If Q = Kp, the reaction is at equilibrium. If Q < Kp, the reaction will proceed to the right (toward products). If Q > Kp, the reaction will proceed to the left (toward reactants).
Unfortunately, we do not have the value of Kp for the reaction at 450 K.

Therefore, we cannot definitively determine whether the reaction mixture is at equilibrium.

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Scientific experimentation to provide the basis for scientific knowledge

A scientific experiment is any process in which measurements are used and tests are carried out to verify or refute a hypothesis and the hypothesis is a proposition that appears to be true, but has not yet been corroborated, and from which an investigation can be developed and experiment plays many roles in science and one of its important roles is to test theories and to provide the basis for scientific knowledge and it can also call for a new theory, either by showing that an accepted theory is incorrect, or by exhibiting a new phenomenon that is in need

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Answer:

Kinetic energy makes it have a higher bond in temperature

Explanation:

A methane molecule (CH4) is considered symmetrical because it possesses a symmetric structure and exhibits symmetry operations.

Symmetry refers to a balanced arrangement of elements that can be divided into equal parts by a plane, axis, or center. In the case of methane, it exhibits several symmetrical characteristics.

Firstly, methane has a tetrahedral molecular geometry, with the carbon atom at the center and four hydrogen atoms positioned around it. This geometry ensures that the molecule is symmetrical in terms of its spatial arrangement.

Each hydrogen atom is located at one of the vertices of the tetrahedron, forming equal angles and distances with respect to the central carbon atom. This symmetry is maintained regardless of the orientation of the molecule.

Additionally, methane possesses rotational symmetry. It can be rotated around any of the carbon-hydrogen bonds, and the molecule will retain its overall appearance.

The symmetry of methane arises from its molecular structure and the equal distribution of electron density around the central carbon atom. The four hydrogen atoms are bonded to the carbon through sigma bonds, which have a cylindrical symmetry. This balanced arrangement of the atoms contributes to the overall symmetry of the molecule.

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Answer:

You play with chemical

Explanation:

Answer:

S= super

C=cool

I=igloo

E=eggs

N=nuts

E=ello

Explanation:

well yes there ya go.

Answer: The energy of an electron in the n = 2 level of a hydrogen atom is 3.40 eV.

Explanation:

Given: n = 2

The relation between energy and \(n^{th}\) orbit of an atom is as follows.

\(E = - \frac{13.6}{n^{2}} eV\)

Substitute the values into above formula as follows.

\(E = - \frac{13.6}{n^{2}} eV\\= - \frac{13.6}{(2)^{2}}\\= - 3.40 eV\)

The negative sign indicates that energy is being released.

Thus, we can conclude that the energy of an electron in the n = 2 level of a hydrogen atom is 3.40 eV.

This is True, Social and emotional development is a developmental domain.

What is developmental domain?

The term "domain" when applied to human development describes particular facets of development and change. Language, social-emotional, cognitive, and physical development are the four basic areas of development.

Social-Emotional Domain is defined by forming relationships and attachments. A child's developing knowledge of and ability to manage their emotions is part of the social-emotional domain. Additionally, they start to recognize other people's emotions, become more cooperative, exhibit empathy, and engage in moral reasoning.

This category of developmental domains covers forming relationships with other people and learning social skills. Children gain skills including sharing, taking turns, and accepting others' differences. They also form a variety of relationships, including ones with their parents, siblings, peers, teachers, coaches, and members of the community.

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Answer:

The number of moles of HBr required to react with 2 g of propyne can be calculated by using the balanced chemical equation:

C3 H4 + 2HBr → C3 H6 Br2

The molar mass of propyne is (3 x 12 + 4 x 1) = 40 g/mol

So, 2 g of propyne is equal to 2/40 = 0.05 moles of propyne.

Since 2 moles of HBr are required to react with 1 mole of propyne, then 0.05 moles of propyne would require 0.05 x 2 = 0.1 moles of HBr.

Finally, to find the number of grams of HBr, we multiply the number of moles by its molar mass, which is (1 x 1 + 80 x 1) = 81 g/mol

So, 0.1 moles of HBr is equal to 0.1 x 81 = 8.1 g of HBr.

Answer:

1. Oxygen Nitrogen

2. silicon Nitrogen

3. Carbon dioxide

Not sure about the 2nd one

Explanation:

prove me wrong

Answer:

It's too far away

Explanation:

According to classical mechanics, gravitational pull is inversely proportional to the distance squared; as the distance increases, the gravitational pull decreases at a faster and faster rate. Since Alpha Centauri A is a few lightyears (Tens of trillions of kilometers away), without even needing to calculate the force of gravity, it is very miniscule.

Answer

b) 1 mole of atoms

Explanation

Avogadro;s Constant says a mole of any substance contains the same number of atoms (6.022 × 10²³).

Therefore, 1 mole of atoms is correct.

Answer:

Example 1

palladium(II) nitrate,

Example 2

Metal catalysts such as Fe, Ni, Mo, and Co are routinely used in the manufacture of CNMs.

Explanation

The three metals used in catalytic converters — rhodium, platinum and palladium — are part of a category known as platinum group metals, or PGMs, which are known for their catalytic properties.

Answer: Cytosine, Thymine, Cytosine, Guanine (option A)

Explanation:

In DNA strands, you must use base-pairing rules to complete strands.

The base-pairing rules are:

Adenine (A) bonds with Thymine (T)

Guanine (G) bonds with Cytosine (C)

By using these rules, you can pair the sequence GAGC with CTCG

The sequence CTCG is also represented as the bases Cytosine, Thymine, Cytosine, and Guanine, making A the correct answer.

I hope this helps!

The pressure inside the tire is approximately 1.970796 newtons per square centimeter (N/cm²) when measured in those units.

To convert the pressure from pounds per square inch (psi) to newtons per square centimeter (N/cm²), we need to use the conversion factors between these units.

First, let's convert pounds to newtons:

1 pound = 0.45359237 kilograms

1 kilogram = 9.80665 newtons

Next, let's convert square inches to square centimeters:

1 square inch = 6.4516 square centimeters

Now, we can perform the conversion:

1 psi = (0.45359237 kg) × (9.80665 N/kg) / (6.4516 cm²)

≈ 0.070307 N/cm²

Therefore, the pressure inside the tire of 28.0 psi is approximately equal to 28.0 × 0.070307 N/cm², which is approximately 1.970796 N/cm².

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Answer:

At STP (standard temperature and pressure), the conditions are:

Temperature (T) = 273.15 K Pressure (P) = 1 atm = 101.3 kPa Volume (V) = 22.4 L (for one mole of gas)

So, for a gas at STP with a volume of 5 L, we can use the following formula to calculate the number of moles present:

n = V / Vm

where: n = number of moles V = volume of gas (in liters) Vm = molar volume of gas at STP (22.4 L/mol)

Plugging in the values, we get:

n = 5 L / 22.4 L/mol n = 0.2232 mol (rounded to four significant figures)

Therefore, there are approximately 0.2232 moles of the gas present.

(Please could you kindly mark my answer as brainliest you could also follow me so that you could easily reach out to me for any other questions)

Answer:

Explanation:

O Potassium and Bromine are in the same period.

The periodic table is a chart of all the known elements arranged according to their atomic structure. Elements in the same period are in the same row of the periodic table and have similar chemical properties because they have the same number of electron shells.

O Nitrogen and Bismuth are not in the same period. Nitrogen is in period 2 and bismuth is in period 6.

O Silver and Calcium are not in the same period. Silver is in period 5 and calcium is in period 4.

O Fluorine and Chlorine are in the same period. They are both in period 2.

Alpha decay occurs in a polonium-218 atom. A brand-new lead element is created. The atomic number and total mass both drop by 2 and 4 respectively as a result.

Lead is a chemical element with the atomic number 82 and the symbol Pb (derived from the Latin word plumbum). Denser than the majority of materials, it is a hefty metal. In addition to having a comparatively low melting point, lead is soft and flexible. Lead is a lustrous grey with a tinge of blue when it is first cut. The total number of protons and neutrons (collectively known as nucleons) in an atomic nucleus is known as the mass number, also known as the atomic mass number or nucleon number (sign A, from the German word Atomic weight [atomic weight]).

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24.6 mol Cu

Math

Pre-Algebra

Order of Operations: BPEMDAS

Chemistry

Atomic Structure

Stoichiometry

Step 1: Define

[Given] 1.48 × 10²⁵ atoms Cu

[Solve] moles Cu

Step 2: Identify Conversions

Avogadro's Number

Step 3: Convert

Step 4: Check

Follow sig fig rules and round. We are given 3 sig figs.

24.5766 mol Cu ≈ 24.6 mol Cu

According to the given equation, 2C4H10 + 1302 — 8CO2 + 10H, 2 moles of O are required to react with 4.71 moles of C4H10.

The number of moles of a compound can be calculated stoichiometrically as follows:

The balanced chemical equation is given as follows:

2C4H10 + 1302 — 8CO2 + 10H

Based on the above equation, 2 moles of C4H10 reacts with 13 moles of O

Therefore; 4.71 moles of C4H10 will react with 4.71 × 6.5 = 30.62 moles of O

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Answer: 30.6

Explanation:

Answer:

A physicist

Explanation:

Physics is that aspect of science that deals with nature and matter in relation to energy. Electricity is a source for energy

PV = nRT= (m/M)RT —-> PM=(m/V)RT=dRT —-> M=d(RT/P), So,  at constant P and T, the molar mass is directly proportional to the gas density.

where M is the molar mass, m, V, d, n are the gas's mass, volume, density, and number of moles, P and T are pressure and temperature, and R is the gas constant. The ideal gas equation (PV = nRT) describes how ideal gases' macroscopic properties are related. An ideal gas is one in which the particles (a) do not attract or repel one another and (b) occupy no space, i.e. have no volume. The ideal gas, also known as the perfect gas, is a gas that, in physical behavior, conforms to a specific idealized relation between pressure, volume, and temperature known as the ideal, or general, gas law.      

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Answer:

False. It is a PHYSICAL change.

Answer:

0.102 M

Explanation:

Given data

Step 1: Calculate the moles of solute

The molar mass of sucrose is 342.3 g/mol. The moles corresponding to 35.0 g of sucrose are:

\(35.0g \times \frac{1mol}{342.3g} =0.102mol\)

Step 2: Calculate the molarity of sucrose in the solution

The molarity is equal to the moles of solute divided by the liters of solution.

\(M=\frac{0.102mol}{1.000L} =0.102 M\)

Answer:

When the new star reaches a certain size, a process called nuclear fusion ignites, generating the star's vast energy. The fusion process forces hydrogen atoms together, transforming them into heavier elements such as helium, carbon and oxygen.

Explanation:

Answer:

\(V_{base}=17.9mL\)

Explanation:

Hello,

In this case, as the reaction between sodium hydroxide and sulfuric is:

\(2NaOH+H_2SO_4\rightarrow Na_2SO_4+2H_2O\)

We can notice a 2:1 molar ratio between the base and the acid, for that reason for the titration at the equivalence point we find:

\(n_{base}=2*n_{acid}\)

Which in terms of concentrations and volumes is:

\(M_{base}V_{base}=2*M_{acid}V_{acid}\)

In such a way, solving for the required volume of base we find:

\(V_{base}=\frac{2*M_{acid}V_{acid}}{M_{base}} \\\\V_{base}=\frac{2*0.820M*2.30mL}{0.211M}\\ \\V_{base}=17.9mL\)

Best regards.

Answer:

lemme guess is it transportation??

The balanced nuclear equation for the beta decay of 234/90Th can be represented as follows: ^234/90Th --> ^234/91Pa + e^0/-1β

In this equation, the nucleus of thorium-234 (234/90Th) undergoes beta decay. During beta decay, a neutron within the nucleus is converted into a proton, resulting in the emission of an electron (beta particle). As a result, the thorium-234 nucleus is transformed into protactinium-234 (234/91Pa) by gaining one proton.

The beta particle emitted during the decay process is represented as e^0/-1β, where the superscript 0 denotes that the electron has no charge (neutral), and the subscript -1 indicates that the electron carries a negative charge of -1.

It is important to note that in a nuclear equation, the total atomic mass and atomic number on both sides of the equation must be equal to maintain a balanced equation and conserve mass and charge.

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The correct answer is option (b): 8.33 liters of stock and 16.67 liters of water. . The remaining volume will be filled with water, which is 25.0 L - 8.33 L = 16.67 L.

What is Solution?

A solution is a homogeneous mixture composed of two or more substances, where one substance (the solute) is uniformly dispersed in another substance (the solvent) at the molecular or ionic level. In a solution, the particles of the solute are evenly distributed throughout the solvent, resulting in a clear and uniform mixture.

To make a 25.0 liter solution of 3.50 M concentration, using a stock solution of 10.5 M, we can use the dilution formula:

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

\(C_{1}\) = 10.5 M

\(V_{1}\) = volume of stock solution (unknown)

\(C_{2}\) = 3.50 M

\(V_{2\) = 25.0 L

Rearranging the formula to solve for \(V_{1\):

\(V_{1}\) = (\(C_{2}\)\(V_{2\)) / \(C_{1}\)

\(V_{1}\)= (3.50 M)(25.0 L) / 10.5 M

\(V_{1}\)= 8.33 L

So, the pharmacist needs to mix 8.33 liters of the 10.5 M stock solution with water to make a 25.0 liter solution of 3.50 M concentration. The remaining volume will be filled with water, which is 25.0 L - 8.33 L = 16.67 L.

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The Fe^3+ is reduced in the reaction while the Al is oxidized in the reaction. The species that loses electrons (is oxidized) is called the reducing agent

A redox reaction (short for reduction-oxidation reaction) is a type of chemical reaction that involves the transfer of electrons between two or more species. In redox reactions, one reactant loses electrons (is oxidized) while another gains electrons (is reduced).

The species that loses electrons (is oxidized) is called the reducing agent, since it causes another species to be reduced. The species that gains electrons (is reduced) is called the oxidizing agent, since it causes another species to be oxidized.

Reduction half equation;

2Fe^3+(aq)  + 6e -----> 2Fe(s)

Oxidation half equation;

2Al(s) →2Al3+(aq) + 6e

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