pls help this is for chemistry the CK-12 “Polyatomic Ions”

The electron configuration for a neutral atom of potassium (K) can be represented as: \(1s^2 2s^2 2p^6 3s^2 3p^6 4s^1\)

This configuration indicates the distribution of electrons in the energy levels and sublevels of the atom. The numbers and letters represent the principal quantum number (n) and the sublevel (s, p, d, f) where the electrons are located. The superscript numbers indicate the number of electrons present in each sublevel.

In the case of potassium, the first two electrons occupy the 1s sublevel, the next eight electrons occupy the 2s and 2p sublevels, and the remaining electron occupies the 3s sublevel. The energy increases as you move from the 1s sublevel to the 4s sublevel.

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Answer:

Explanation:

Here, we want to calculate the initial volume of the container

Mathematically, we know that volume and pressure are inversely related. What this means is that as volume increases, pressure is expected to decrease and as pressure increases, volume is expected to decrease

A mathematical link between these two is as follows:

The above is according to Boyles' law.

The values with subscript 1 are the initial values, while the values with the subscript 2 are the final values

Thus:

V1 = ?

P1 = 1.25 atm

V2 = 1L

P2 = 3.75 atm

From the relation:

Answer:

Ionic substances are generally most soluble in polar solvents; the higher the lattice energy, the more polar the solvent must be to overcome the lattice energy and dissolve the substance. Many ionic compounds are soluble in other polar solvents, however, such as liquid ammonia, liquid hydrogen fluoride, and methanol.

a) The initial size of the culture was 18 cells. b) There were approximately 44 cells in the culture after 20 minutes. c) There were approximately 158 cells in the culture after 2.5 hours.

a. To solve for N, we need to use the given information that after 2 hours, there were 144 cells. The formula for exponential growth is N = W * e^(rt), where N is the number of cells, W is the initial size of the culture, r is the growth rate, and t is the time in hours. Plugging in the values we have, we get:

144 = W * e^(2r) Dividing both sides by W: 144/W = e^(2r) Taking the natural logarithm of both sides: ln(144/W) = 2r Solving for r: r = ln(144/W) / 2 Now we can plug in W and r to solve for N: N = W * e^(rt) = W * e^(ln(144/W)/2 * 2) N = W * e^ln(144/W) N = 144

Therefore, the initial size of the culture was 18 cells (N = 144/W, W = 144/N = 144/8 = 18).

b. To find the number of cells in the culture after 20 minutes, we need to convert 20 minutes to hours (since the formula uses hours). 20 minutes is 1/3 of an hour. Plugging in this value to the formula, we get:

N = W * e^(rt) = W * e^(1/3 * r) We still don't know the value of r, but we can use the information that the culture grows exponentially to find it. We know that the culture grows from W to N in the time period t (2 hours in part a), so we can set up the equation:

N = W * e^(rt) 144 = 18 * e^(2r) Simplifying: 8 = e^(2r) ln(8) = 2r r = ln(8) / 2 Now we can plug in r and t to find N: N = W * e^(rt) = 18 * e^(1/3 * ln(8)/2) N = 44.33 (rounded to two decimal places)

Therefore, there were approximately 44 cells in the culture after 20 minutes.

c. To find the number of cells in the culture after 2.5 hours, we can plug in the given values into the formula:

N = W * e^(rt) = 18 * e^(2.5r) Using the value of r we found in part b: N = 18 * e^((2.5 * ln(8))/2) N = 158.49 (rounded to two decimal places)

Therefore, there were approximately 158 cells in the culture after 2.5 hours.

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A. The electronic configuration for the isotope we want is as follows:

\(1s^2 2s^2 2p^6 3s^2 3p^6\).

B. The element belongs to period 3 and group 18.

C.The last electron's four quantum numbers are:

m_s = +1/2 or -1/2 (since the electron can spin up or spin down)

D. With fluorine, the element will develop an ionic connection.

The positioning of electrons within an atom, molecule, or other physical structure, such as a crystal, is referred to as electronic configuration. It is typically represented by an array of numbers, letters, or superscripts that denote the number of electrons in each atom or molecule's shell or subshell.

Let the first isotope's mass number be x, the second isotope's mass number be y, and the third isotope's mass number be z. Also, let the first isotope's neutron number be a, the second isotope's neutron number be b, and the third isotope's neutron number be c. Using the information provided, we can construct two equations:

126 = x + y + z (equation 1)

a+b+c=60 (equation 2)

Because all three isotopes contain the same amount of protons, we can infer that their electrical configurations are the same. As a result, all that remains is to determine the electrical structure of one of the isotopes.

We can use the fact that the total of the mass numbers is equal to the amount of protons plus the number of neutrons. Let m be the isotope's mass number and z be the number of protons (the atomic number). Then:

m = z + n, where n is the number of neutrons.

The electrical arrangement of an element can also be used to calculate the atomic number. Assume if the isotope we're seeking for is a periodic table element. The element's electrical configuration can be written as:

\(1s^2 2s^2 2p^6 3s^2 3p^6\)

The configuration's last electron is in the (n+1)s or (n+1)p orbital. As a result, we may calculate the atomic number by counting the number of electrons in the arrangement. For example, the atomic number for the aforementioned electrical configuration is 18 (2 + 8 + 8).

Let's look for the electrical configuration of the isotope we're after. Because the element's electrical configuration is not specified, we can presume it is a noble gas. As an example, consider argon (Ar), which has the electrical configuration:

\(1s^2 2s^2 2p^6 3s^2 3p^6\)

Because argon belongs to period 3 and group 18 (also known as group 8A), the isotope we seek belongs to period 3 and group 18. This is due to the fact that atoms in the same class have the same amount of valence electrons and chemical characteristics.

As a result, the electrical configuration of the isotope we seek is:

\(1s^2 2s^2 2p^6 3s^2 3p^6\)

b) The element belongs to period 3 and group 18.

c) The last electron's four quantum numbers are:

Because the electron is in the 3p orbital, n = 3 l = 1.

Because there are three 3p orbitals, m_l = -1, 0, or 1.

m_s = +1/2 or -1/2 (since the electron can spin up or spin down)

d) With fluorine, the element will develop an ionic connection. Because the element belongs to group 18, it has 8 valence electrons, making it a stable noble gas configuration. It may gain one electron to make a 1- ion or lose eight electrons to form an 8+ ion to obtain this state. Fluorine has seven valence electrons and can gain one electron to produce.

Therefore, the electronic configuration for the isotope we want is as follows:

\(1s^2 2s^2 2p^6 3s^2 3p^6\)

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Your question is in Spanish, but the English translation of the question is:

The sum of the mass numbers of three isotopes is 126 and the sum of the neutron numbers is 60. Find the electronic configuration of one of the isotopes if its electric charge is

1- b) Determine group and period for said element.

c) Determine the four quantum numbers for the last electron.

d) If the element they found joins with the fluorine element, what type of bond will it form?

The neutral atom is isoelectronic with N⁻³ is Neon (Ne).

Isoelectronic are those which have same number of electrons or we can say that same electronic structure.

For finding out that the species are isoelectronic , we just have to count there no. of electrons of atoms and if they have same no. of electron then they said to be isoelectronic species.

no. of electrons in Nitrogen N = 7 ( atomic no.)

no. of electrons in Nitride ion N⁻³ = 7 + 3 = 10

no. of electrons in Neon Ne = 10 ( atomic no. and neutral atom)

so, no. of electrons in Nitride ion N⁻³  = no. of electron in Neon Ne

this means , N⁻³ , Nitride ion is isoelectronic with Neon Ne.

Thus, The neutral atom is isoelectronic with N⁻³ is Neon (Ne).

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The pH that corresponds to the highest concentration of hydroxide ions is pH = 12.

The correct option is B.

Hydroxide ion concentration increases as the pH of a solution becomes more alkaline or basic. pH, by definition, is the negative logarithm of the hydrogen ion concentration, H+. When pH = 12, the concentration of hydroxide ions, OH-, is at its highest. At this pH level, hydroxide ions are more concentrated than hydrogen ions, resulting in a basic solution.

Hydroxide ion concentration increases as the pH of a solution becomes more alkaline or basic. pH, by definition, is the negative logarithm of the hydrogen ion concentration, H+. When pH = 12, the concentration of hydroxide ions, OH-, is at its highest. At this pH level, hydroxide ions are more concentrated than hydrogen ions, resulting in a basic solution. Basic solutions have pH values greater than 7, whereas acidic solutions have pH values less than 7.

Therefore, pH=12 is the pH that corresponds to the highest concentration of hydroxide ions in the given options.

The pH that corresponds to the highest concentration of hydroxide ions is pH = 12.

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6 co2 molecules required during the calvin cycle to make one molecule of glucose beacuse One carbohydrate molecule requires six rounds of the Calvin cycle to create since it contains six carbon atoms (one for each carbon dioxide molecule fixed).

What is calvin cycle?

The C3 cycle is another name for the Calvin cycle. The process by which the carbon from the carbon cycle gets fixed into sugars is a series of chemical processes. The chloroplast of the plant cell is where it takes place.

Because the main stable intermediate is the 3-carbon compound glyceraldehyde-3-phosphate, C3-type plants—so named because it is their most frequent set of carbon fixation reactions—are observed. The Calvin cycle, which best describes these reactions.

The processes of photosynthesis that utilise the energy accumulated by the light-dependent reactions to create glucose and other carbohydrates molecules are known as the Calvin cycle.

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Answer:

504000 J

Explanation:

Applying,

Δq = cm(Δt)............. Equation 1

Where Δq = change in thermal energy, c = specific heat capacity of water,  m = mass of water, Δt = change in temperature.

From the question,

Given: m = 2 kg, Δt = 80-20 = 60°C

Constant; c = 4200 J/kg.°C

Substitute these values into equation 1

Δq = 2(4200)(60)

Δq = 504000 J

Hence the thermal energy is  504000 J

Answer:

.079 moles of Nirogen gas (N2)

Explanation:

You can see from the equaton that each ONE mole of N2 produces TWO moles of NH3.

 Find the number of moles of NH3 produced.

    Using Periodic Table : Mole wt of NH3 = 17 gm/mole

          2.7 gm / 17 gm/mole = .1588 moles

      One half as many moles of N2 are needed  = .079 moles

If we wanted to produce 4.30 grams of iron (III) hydroxide, the ml of 1.00 M Fe(NO₃)₃  excess sodium hydroxide is 0.040 L.

The mass of the iron (III) hydroxide = 4.30 grams

The mass molar  of iron (III) hydroxide = 106.87 g/mol

The moles of the iron (III) hydroxide = mass /molar mass

The moles of the iron (III) hydroxide = 4.30 / 106.87

The moles of the iron (III) hydroxide = 0.040 mol

The molarity = 1 M

The volume = moles / molarity

Volume = 0.040 / 1

Volume = 0.040 L

Thus, the volume of Fe(NO₃)₃  is 0.040 L.

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Answer:A.) Mechanical and nuclear

Explanation:

iv,e got nuthing sorry im only a kid i have to leared that yet

answer:

B) Radiant and Thermal

explanation:

  "In a flashlight, chemical energy in the batteries is converted to electrical energy when the circuit including the batteries, switch and light bulb is completed. The electrical energy is converted to light (electromagnetic / radiant energy) and some heat (thermal energy) by the light bulb." -https://www.crosbyisd.org/cms/lib6/TX02216626/Centricity/Domain/392/6_9C-EnergyFormsConversions.pdf

Explanation:

We have a 63.9 g sample of calcium hydroxide. First we have to convert those grams into moles. To do that we have to use the molar mass of calcium hydroxide.

Calcium hydroxide = Ca(OH)₂

molar mass of Ca = 40.08 g/mol

molar mass of O = 16.00 g/mol

molar mass of H = 1.01 g/mol

molar mass of Ca(OH)₂ = 1 * 40.08 g/mol + 2 * 16.00 g/mol + 2 * 1.01 g/mol

molar mass of Ca(OH)₂ = 74.10 g/mol

mass of Ca(OH)₂ = 63.9 g

moles of Ca(OH)₂ = 63.9 g /(74.10 g/mol)

moles of Ca(OH)₂ = 0.862 moles

In 1 molecule of Ca we have 2 atoms of O. So in 1 mol of Ca(OH)₂ we will have 2 moles of O atoms.

1 mol of Ca(OH)₂ = 2 moles of O atoms

moles of O atoms = 0.862 moles of Ca(OH)₂ * 2 moles of O /1 mol of Ca(OH)₂

moles of O atoms = 1.724 moles

One mol is similar to a dozen. When we say that we need a dozen eggs we know that we need 12 eggs. If we want a mol of eggs, we want 6.022*10^23 eggs. So one mol of something is 6.022 * 10^23 of that.

1 mol of O atoms = 6.022 * 10^23 atoms

n° of O atoms = 1.724 moles * 6.022 * 10^23 atoms/1 mol

n° of O atoms = 1.04 * 10^24 atoms

Answer: In a 63.9 g sample of Ca(OH)₂ we have 1.04 *10^24 atoms of oxygen.

Answer:

No I don't have a graph of the Boyle's law

The false statement among the given options is 5.) No two molecular orbitals for any molecule ever have the same energy. This statement is incorrect because molecular orbitals can have the same energy levels, which is known as degeneracy.

Degenerate orbitals occur when two or more molecular orbitals have the same energy, often seen in molecules with high symmetry.

In contrast, the other statements are true:
1.) In Molecular Orbital (MO) theory, all electrons, including core and valence electrons, are considered while forming molecular orbitals.
2.) Electrons occupy MOs following the Aufbau Principle, which states that electrons fill the lowest energy orbitals first, before occupying higher energy orbitals.
3.) Electrons occupy MOs following Hund's Rule, meaning that they fill degenerate orbitals singly with parallel spins before pairing up in any orbital.
4.) Electrons occupy MOs following the Pauli Exclusion Principle, which states that no two electrons in the same atom or molecule can have the same set of quantum numbers, ensuring that each electron has a unique energy state.

In summary, statements 1-4 accurately describe principles and rules applied in MO theory, while statement 5 is false due to the existence of degenerate orbitals with the same energy levels.

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Convection is a made of heat transfer taking place in fluids. Liquids and gases are together called the fluid state of matter.

Heat will transfer from one region to the other through different modes in different states of matter. In solids the heat transfer mode is called conduction where heat is transferred through the closely packed molecules in one by one.

Convection is taking place in fluids, where hot molecule rises above from the bottom and transfers the heat to other molecules by travelling through their allotted space.

The three states of matter are solids, liquids and gases where gases and liquids together called as fluids because  in both states molecules are free to move and flow.

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The intermolecular bonds between HF-HF and H₂O-H₂O pairs are hydrogen bonds. The boiling point of water is higher than that of HF due to Size and molecular weight, and Strength of hydrogen bonding.

The intermolecular bonds between HF-HF and H₂O-H₂O pairs are hydrogen bonds. Hydrogen bonding occurs when a hydrogen atom is covalently bonded to a highly electronegative atom (such as fluorine or oxygen) and forms a weak electrostatic attraction with another electronegative atom in a different molecule. In the case of HF and H₂O, the hydrogen atoms are bonded to highly electronegative fluorine and oxygen atoms, respectively.

However, the boiling point of water is higher than that of HF due to the following reasons;

Size and molecular weight; Water (H₂O) has a larger molecular size and higher molecular weight compared to hydrogen fluoride (HF). Generally, larger molecules and higher molecular weights result in stronger intermolecular forces, leading to higher boiling points. The additional hydrogen bonding interactions in water contribute to its higher boiling point.

Strength of hydrogen bonding; Hydrogen bonding in water is relatively stronger than in hydrogen fluoride. Oxygen is more electronegative than fluorine, resulting in a larger dipole moment in the O-H bond compared to the F-H bond. This stronger electronegativity difference leads to stronger hydrogen bonding in water, which requires more energy to break the intermolecular bonds and reach the boiling point.

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The percent error is 1.65%.

Experimental atomic mass of magnesium,

m = 24.7

Actual atomic mass of magnesium,

a = 24.30

Error = experimental - actual atomic mass

        = m - a

        = 24.7 - 24.3

        = 0.4

To calculate percent error, we use the following formula:

Percent error = (Error / Actual value) × 100%

Now, let's substitute the values.

Percent error = (0.4 / 24.30) × 100%

Percent error = 1.65%

Therefore, the percent error is 1.65%.

Answer rounded to correct sig figs is 1.7%.

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The percent error is 1.65%.then Answer rounded to correct sig figs is 1.7%.this is the correct answer for the question.

Experimental atomic mass of magnesium,

m = 24.7

Actual atomic mass of magnesium,

a = 24.30

Error = experimental - actual atomic mass

       = m - a

       = 24.7 - 24.3

       = 0.4

To calculate percent error, we use the following formula:

Percent error = (Error / Actual value) × 100%

Now, let's substitute the values.

Percent error = (0.4 / 24.30) × 100%

Percent error = 1.65%

Therefore, the percent error is 1.65%.

Answer rounded to correct sig figs is 1.7%.

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Answer:

1 grams NH3 is equal to 0.058718113128665 mole. Note that rounding errors may occur, so always check the results. Use this page to learn how to convert between grams NH3 and mole.

Explanation:

Answer:

I guess 1-mole carbon dioxide contains 6.02 x 10^23 molecules.

Answer:

hope it helps ..

Explanation:

Allotropes can be defined as different types of compounds made out of the same single element but in different chemical formulas and different arrangements. Isomers can be defined as the chemical compounds that have a similar molecular formula but with different structural formulae. Graphite and Diamond.

The Lewis structure for iodoethane (C2H,1) is as follows.

I - C - C - H

| |

H H

| |

H H

A Lewis structure, also known as a Lewis dot diagram, is a way to represent the bonding and non-bonding electrons in a molecule. It is named after Gilbert N. Lewis, who introduced it in 1916. A Lewis structure shows the chemical symbol of each atom in the molecule and the electrons that are involved in the chemical bonds. It is used to predict the molecular geometry, reactivity, and other chemical properties of a molecule.

In this structure, the central atom is the carbon atom, and the outer atoms are the hydrogen and iodine atoms. The carbon atoms each have four bonds, which are satisfied by the three hydrogen atoms and the iodine atom. The iodine atom has one lone pair, which is not shown in the structure.

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Answer:

The acid mist is known as laze - a term combining the words lava and haze - when laze and sea water combine. Laze is potentially deadly if inhaled and can be hot and corrosive. If anyone goes near it, they can experience breathing difficulties and irritation of their eyes and skin.

Explanation:

hope it helps :)

Answer:

The molecular weight of Mg is 24.3 so 12 grams is 0.494 mole. So, since for every mole of Mg will result in one mole of H2, then, 0.494 mol of Mg will result in the formation of 0.494 mol of H2.

Explanation:

The simplest whole-number ratio of the various atoms in a compound is represented by an empirical formula.

empirical method a chemical formula, rather than listing the total number of atoms in a molecule, shows the most basic ratio of the components in a compound.

The precise number of various atom types present in a compound's molecule is indicated by the molecular formula. The empirical formula for acetylene is CH. The empirical formula for acetylene is C2H2.

Sample mass equals 0.7789 CO2 mass generated = 1.179

Produced mass of to = 0.3179

C mass in the sample equals \(12 x 1.17 44, or 0.3199.\)

Its mass in the sample is equal to \(2 x 0.317 18 = 0.0359\)

The sample's mass of is given by \(0.778-(0.319+0.035) = 0.424 0.319\).

Divide by 12 H 0.035 0.424 mass their molar and \(0.319 0.035 \s0.424 16 \s0.027 \s0.035 \s0.027\)

by the smallest number

\(0.027 \s0.027 \s0.035 \s0.027 \s0.027 0.027 \s1.3\)

To express the number 3 4 3 in whole numbers, multiply by 3.

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Answer:

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