which is the electron configuration for Americum?
O [Rn]7s2477
O [Rn]7s2587
O [Rn]7s26f7
O [Rn]7s27f7

Answer:

313.6 L

Explanation:

use mole/mole ratio to find moles of CO2 (=14)

multiply by 22.4

=313.6 L

3.59 mol

1.836 x 10 ²⁵ molecules

Given

230 g SO2

30.5 moles LiNO3

Required

moles and molecules

Solution

mol = mass : molar mass

1 mol = 6.02 x 10²³ particles(molecules, atoms, ions)

1. 230 g x 1 mol/64,066 g  =3.59 mol

2. 30.5 moles x 6.02 x 10 ²³ molecules / 1 mol = 1.836 x 10 ²⁵ molecules

Answer:

When electrons move to a lower energy level.

Explanation:

Answer:

pH ≈ 6.3

Explanation:

To calculate the pH of an aqueous solution, you need to know the hydronium ion (H₃O+) concentration in moles per liter (molarity).  The pH is then calculated using the expression:

      pH = - log [H₃O+]

Since the solution has an H₃O+ ion concentration of 5.2 × 10⁻⁷ M, we can plug that in and solve:

      pH = - log [5.2 × 10⁻⁷]

      pH = 6.28

statement correctly describes the electronic charge distribution in a molecule-Option 2 The electronic charge is distributed equally around each atom in the molecule.

When charged matter is positioned in an electromagnetic field, it encounters a force due to its physical property of electrical charges. A positive or negative electric charge can exist (commonly carried by protons and electrons respectively). Like charges repel each other and, while unlike goods become more expensive one another. Coulomb, unit of electrical charges in the m long system, which serves as the foundation for the SI physical unit. C is the abbreviation. The coulomb is defined as the amount of electricity transferred in one second by a one-ampere current. Charge (exhibited by protons) and negative charge are indeed the two types of charge (exhibited by electrons.

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The formula for Co3+ is Co3+ because it represents the ion of cobalt that has lost three electrons, leaving it with a 3+ charge.

What is chemical formula and how they are formed ?

A chemical formula is a symbolic representation of a chemical compound that shows the types of elements present in the compound and the relative number of atoms of each element. For example, the chemical formula for water is H2O, which indicates that it is made up of two hydrogen atoms and one oxygen atom.

Chemical formulas are formed by identifying the elements that make up a compound and determining the relative number of each element in the compound. The number of each element is represented by a subscript following the chemical symbol of the element. For example, the chemical formula for methane is CH4, which indicates that there is one carbon atom and four hydrogen atoms in each molecule of methane.

The formula for Se2- is Se2- because it represents the ion of selenium that has gained two electrons, giving it a 2- charge.

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Answer:

Afom of noble gases can exists independently and form monoatomic molecules like helium neon argon etc so these are monoatomic molecules not compound

Explanation:

Answer:

Explanation:

The empirical formula of polyethylene can be determined by converting the given percentages of carbon (C) and hydrogen (H) into grams. To find the grams of each element, we assume a 100.0 g sample of polyethylene.

For carbon:

Mass of carbon = 86.0% × 100.0 g = 86.0 g

For hydrogen:

Mass of hydrogen = 14.0% × 100.0 g = 14.0 g

Therefore, in a 100.0 g sample of polyethylene, there are 86.0 grams of carbon and 14.0 grams of hydrogen.

The empirical formula of a compound represents the simplest whole-number ratio of atoms present in the compound. To determine the empirical formula, we need to find the ratio of carbon to hydrogen in terms of moles.

First, we convert the masses of carbon and hydrogen into moles using their respective molar masses. The molar mass of carbon is approximately 12.01 g/mol, and the molar mass of hydrogen is approximately 1.008 g/mol.

Number of moles of carbon = 86.0 g / 12.01 g/mol ≈ 7.162 mol

Number of moles of hydrogen = 14.0 g / 1.008 g/mol ≈ 13.89 mol

Next, we divide the number of moles of each element by the smallest number of moles to get a simplified ratio.

Carbon: Hydrogen ≈ 7.162 mol : 13.89 mol ≈ 1 : 1.939

Since we want to express the ratio in whole numbers, we multiply both sides by 2 to get a whole number ratio.

Carbon: Hydrogen ≈ 2 : 3.878

Rounding to the nearest whole number, we find that the empirical formula of polyethylene is CH₂.

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What causes the changes in the ice ages is when the earth's orbits tilts.

The ice ages are caused by changes in Earth's orbit and tilt, which affect the amount of solar radiation received by the planet. These changes alter the climate and trigger the growth and retreat of ice sheets.

We know that the changes in the climates is responsible for most of the changes that we can see in the universe as we have come to experience it today.

Thus the earth's orbits is what does control the changes in the ice ages.

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It is important to drop the balls from the same height because : ( B ) Dropping the balls from different heights would introduce error

The experiment Anthony is trying to perform is to determine the effect of the air inside a basketball on how high the ball will bounce, therefore other variables such as height should be kept constant ( i.e the same for every ball to be used for the experiment ).

If anthony drops the balls at different heights that will have a direct effect on the measurement of the bounce heights attained by each ball therefore creating room for error in the experiment .

Therefore we can conclude that It is important to drop the balls from the same height because  Dropping the balls from different heights would introduce error

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ideal gas

PV=nRT

T = PV/nR

T = 1 x 12/9 x 0.08205

T = 16.25 K

Answer:

the answer is 41.374 cubic inches

C. The pH stays about the same.

Answer:

C.The pH stays about the same.

Explanation:

Buffer reactions maintain stable pH of solutions.

Answer:

d

Explanation:

i looked it up

Mechanical energy is not a form of kinetic energy. Hence, option D is correct.

Kinetic energy is a form of energy that an object or a particle has by reason of its motion.

Mechanical energy is the sum of the kinetic energy, or energy of motion, and the potential energy, or energy stored in a system by reason of the position of its parts.

Hence, option D is correct.

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One of the main terms used in physics to describe the radioactive decay of a specific sample or element over a predetermined amount of time is half-life, also known as half-life period. Here the mass left is 25 g.

A radioactive material's half-life is typically described as the amount of time it takes for one half of its atoms to decay or change into another substance. Ernest Rutherford made the first discovery of the theory in 1907. It is typically denoted by the letters Ug or t1/2.

Here 9 billion years = 2 half lives

Then the mass left is find out by the equation:

1. M = M₀ × (1/2)ⁿ

M = 100  × (1/2)²

M = 25 g

2. M₀ = 0.2 g

M = 0.2 × (1/2)³

M = 0.025 g

3. M = 500 × (1/2)³ = 62.5 g

4. M = 0.06 × (1/2)³ = 0.0075 g

5. M =  500 × (1/2)³ = 62.5 g

6. M = 300 × (1/2)⁴ = 18.75 g

7. M = 0.15  × (1/2)³ = 0.0187 g

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The oxidation number of chlorine in KClO3 is +5 (option A).

The oxidation number of an element is the hypothetical charge of an atom within a molecule.

The oxidation number of an element like chlorine in a compound like Pottasium chlorate can be calculated as follows:

The oxidation number of the elements in KClO3 is as follows:

1 + x - 2(3) = 0

x - 5 = 0

x = +5

Therefore, the oxidation number of chlorine in KClO3 is +5.

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The identity of element Y can be any one of the following as all the options are representing elements.

It is defined as a substance which cannot be broken down further into any other substance. Each element is made up of its own type of atom. Due to this reason all elements are different from one another.

Elements can be classified as metals and non-metals. Metals are shiny and conduct electricity and are all solids at room temperature except mercury. Non-metals do not conduct electricity and are mostly gases at room temperature except carbon and sulfur.

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A transformation of chemical energy to electrical energy occurs when there is a chemical reaction between metals and nonmetals.

The movement of electrons from one atom to another is what results in electrical energy.

A battery is a device that converts chemical energy contained within its active materials directly into electric energy by means of an electrochemical oxidation-reduction (redox) reaction. This type of reaction involves the transfer of electrons from one material to another via an electric circuit.

Hence, option C is correct.

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The coefficient needed in front of the product potassium to properly balance this chemical equation is 3 (option B).

A chemical equation is said to be balanced when the number of atoms of each element on both sides of the equation are the same.

According to this question, potassium phosphide reacts with aluminum in a single replacement reaction to produce aluminum phosphide and potassium as follows:

K₃P + Al → AlP + 3K

The coefficient in front of pottasium in the balanced equation is 3.

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The equation for the equilibrium constant K = [ Cr₂O₇²⁻] [  H₂O ] / [ Cr₂O₇²⁻ ]²  [ H⁺]².

For a chemical reaction, the equilibrium constant can be defined as the ratio of reactant to product that is used to determine chemical behavior. At equilibrium, the forward reaction rate equals the backward reaction rate.

Equilibrium constants vary with temperature and are unaffected by reaction quantities, catalysts, or inert materials. Furthermore, it is unaffected by reactant concentrations, pressures, or volumes. In general, the temperature dependence of the equilibrium constant is determined by H of the reaction.

Thus, The equation for the equilibrium constant K = [ Cr₂O₇²⁻] [  H₂O ] / [ Cr₂O₇²⁻ ]²  [ H⁺]².

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Answer: e. 4.8 h

Explanation:

Expression for rate law for first order kinetics is given by:

\(t=\frac{2.303}{k}\log\frac{a}{a-x}\)

where,

k = rate constant  

t = age of sample

a = let initial amount of the reactant  

a - x = amount left after decay process  

a) for rate constant

Half life is the amount of time taken by a radioactive material to decay to half of its original value.

\(t_{\frac{1}{2}}=\frac{0.693}{k}\)

\(k=\frac{0.693}{0.77hr}=0.9hr^{-1}\)

b) for 160.0 g to decay to 2.07 g

\(t=\frac{2.303}{0.9}\log\frac{160.0}{2.07}\)

\(t=4.8hr\)

The time  required for a 160.0-g sample of 158Eu to decay to 2.07 g is 4.8 hours

The total number of electrons  Al+3. Fe¹3 Mg² Sn¹² Co²Co³ Lit¹ Cr+3,  Rb Pt+2 are 3, 3, 2, 12, 2, 3, 0, 3.0,2 electrons

Electrons are subatomic particles that have a negative charge and are found outside the nucleus of an atom. They orbit the nucleus in shells or energy levels and are involved in chemical bonding and electricity. Electrons are much smaller in size compared to protons and neutrons, which make up the nucleus of an atom.

Al+3 has 10 electrons (13 protons - 3 electrons).

Fe¹3 has 20 electrons (26 protons - 3 electrons).

Mg² has 10 electrons (12 protons - 2 electrons).

Sn¹² has 50 electrons (50 protons - 12 electrons).

Co² has 27 electrons (27 protons - 2 electrons).

Co³ has 26 electrons (27 protons - 3 electrons).

Li¹ has 3 electrons (3 protons - 0 electrons).

Cr+3 has 21 electrons (24 protons - 3 electrons).

Rb¹ has 37 electrons (37 protons - 0 electrons).

Pt+2 has 76 electrons (78 protons - 2 electrons).

Therefore,  The number of electrons in an atom determines its chemical behavior and the way it interacts with other atoms.

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Answer:

.. ..

:O = C - Cl:

.. | ..

:Cl:

..

Answer: The atomic symbol of manganese or Aka  D

Explanation: I did the test

Answer:

The atomic symbol of manganese or Aka  D

Explanation:

Answer:

B - Idea models are not typically used to predict natural disasters.

To answer this question using Dalton's law, we need to know the partial pressures of each gas in the mixture. Dalton's law states that the total pressure of a mixture of gases is equal to the sum of the partial pressures of each gas in the mixture.

Let's say the diver has a tank with the following gas mixture:

Oxygen (O2): 21%

Nitrogen (N2): 79%

And the pressures in the tank at the end of the dive are:

Oxygen (O2) pressure: 500 psi

Nitrogen (N2) pressure: 2000 psi

To find the total pressure in the tank, we need to calculate the partial pressure of each gas in the mixture. We can do this by multiplying the percentage of each gas by the total pressure in the tank:

Oxygen (O2) partial pressure = 0.21 x 2500 psi = 525 psi

Nitrogen (N2) partial pressure = 0.79 x 2500 psi = 1975 psi

Then, we can use Dalton's law to find the total pressure in the tank:

Total pressure = Oxygen partial pressure + Nitrogen partial pressure

Total pressure = 525 psi + 1975 psi

Total pressure = 2500 psi

Therefore, the total pressure in the tank is 2500 psi.

Answer:To answer this question using Dalton's law, we need to know the partial pressures of each gas in the mixture. Dalton's law states that the total pressure of a mixture of gases is equal to the sum of the partial pressures of each gas in the mixture.

Let's say the diver has a tank with the following gas mixture:

Oxygen (O2): 21%

Nitrogen (N2): 79%

And the pressures in the tank at the end of the dive are:

Oxygen (O2) pressure: 500 psi

Nitrogen (N2) pressure: 2000 psi

To find the total pressure in the tank, we need to calculate the partial pressure of each gas in the mixture. We can do this by multiplying the percentage of each gas by the total pressure in the tank:

Oxygen (O2) partial pressure = 0.21 x 2500 psi = 525 psi

Nitrogen (N2) partial pressure = 0.79 x 2500 psi = 1975 psi

Then, we can use Dalton's law to find the total pressure in the tank:

Total pressure = Oxygen partial pressure + Nitrogen partial pressure

Total pressure = 525 psi + 1975 psi

Total pressure = 2500 psi

Therefore, the total pressure in the tank is 2500 psi.

Explanation:

Phosgene is produced by the reaction; CO + Cl2 --> COCl2

Though your question is unclear, it revolves around the formation of phosphagen.

Phosgene is a highly toxic gas that is used in the production of a variety of chemicals, including pesticides, pharmaceuticals, and dyes. It is produced by the reaction of carbon monoxide (CO) and chlorine (Cl2) in the presence of a catalyst. The reaction can be represented by the following equation:

CO + Cl2 --> COCl2

This reaction is highly exothermic and typically requires a catalyst such as activated carbon, iron, or nickel to proceed at a reasonable rate. The process of producing phosgene is highly dangerous and requires careful handling and safety measures to prevent accidental release of the toxic gas.

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