Identify three nonmetal atoms that, when bonded covalently, have a neon electron configuration

Answer:

Drinking water should have sufficiently low levels of dissolved salts or microbes.

Explanation:

An unknown mixture is set in beaker on the teacher's table the five different parts of the mixture and we can separate it by method evaporation, distillation, sedimentation, and filtration

Mixture is the composed of one or more pure substances in varying compositions called as mixture and unknown mixture is separated by  shake the separatory funnel to allow intimate mixing of the solutions and effect extraction of the compound from the organic mixture and mixture can be physically separated by sedimentation process, filtration, crystallization, distillation, diffusion, panning, magnetic separation, and adsorption are a few of the methods used to separate materials and the substance is said to be pure when a sample of it has purified all other type of material

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Therefore, the number of water molecules (X) in the formula is approximately 2.42 × 10²⁴. Therefore, both compounds contain the same percentage of oxygen. The percent of anhydrous compound in the beaker is 53.8%.

A molecule is a group of two or more atoms held together by chemical bonds. It is the smallest unit of a compound that has the chemical properties of that compound. Molecules can be made up of atoms of the same element or different elements.

Here,

Question 1:

If KB5O8·XH2O contains 24.6% of water and its formula weight is 293.15 g/mol, we can calculate the molecular weight of the water and use that to determine the value of X. The molecular weight of water is 18.015 g/mol (rounded to the hundredths place).

The mass of water in the compound is:

24.6% of 293.15 g/mol = 72.1989 g/mol

The number of moles of water is:

72.1989 g/mol ÷ 18.015 g/mol = 4.0061 mol

The number of water molecules is:

4.0061 mol × Avogadro's number = 2.42 × 10²⁴ molecules

Therefore, the number of water molecules (X) in the formula is approximately 2.42 × 10²⁴.

Question 2:

To calculate the percent of oxygen in ammonium nitrite and ammonium carbonate, we need to determine the molecular formulas of each compound.

The molecular formula of ammonium nitrite is NH4NO2, and its molecular weight is approximately 64.06 g/mol. The percent of oxygen in ammonium nitrite is:

(2 × 16.00 g/mol ÷ 64.06 g/mol) × 100% = 50.0%

The molecular formula of ammonium carbonate is (NH4)2CO3, and its molecular weight is approximately 96.09 g/mol. The percent of oxygen in ammonium carbonate is:

(3 × 16.00 g/mol ÷ 96.09 g/mol) × 100% = 50.0%

Therefore, both compounds contain the same percentage of oxygen.

Question 3:

To calculate the percent of anhydrous compound in the beaker, we need to determine the mass of water that was lost during heating.

The mass of the hydrate (including water) is:

134.92 g – 128.89 g = 6.03 g

The mass of the anhydrous compound is:

132.14 g – 128.89 g = 3.25 g

The mass of water lost during heating is:

6.03 g – 3.25 g = 2.78 g

The percent of anhydrous compound in the beaker is:

(3.25 g ÷ 6.03 g) × 100% = 53.8%

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Answer: friction between a car's windshield and the air as you drive into the wind.

Explanation: Hope this helps :)

Answer:

yeppppppppppppp

Answer:

yes

plants makes the oxygen by the

process of photosynthesis and

release to environment and animals

uses these oxygen to survive on this Earth

hope it helps

In electrophilic aromatic substitution reactions, a phenyl substituent on the aromatic ring is an activator and an o, p-director. This is why, because,

Phenyl rings are activating groups because they increase the electron density of the benzene ring. Like alkyl groups, phenyl groups are weak electron donors via inductive effect. Since they activate the ring, the direct the next substitution at the ortho and para positions.

What is Electrophilic Aromatic Substitution?

Aromatic compounds like benzene usually undergo substitution reactions instead of addition reactions. Substitution reactions are preferred since these preserve the aromaticity of the ring.

What is the first step in the general mechanism for electrophilic aromatic substitution?

Answer:

Addition of the electrophile to the aromatic ring, because,

The electrophilic aromatic substitution mechanism can be denoted as follows:

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The pKa values of salicylic acid and its constitutional isomer are different, even though we might have expected them to be the same based on the rules we learned in this chapter (ario). Salicylic acid is apparently more acidic than its constitutional isomer.

One possible explanation for this observation is the presence of resonance in salicylic acid. Resonance occurs when electrons can delocalize over multiple atoms. In salicylic acid, the phenolic hydroxyl group can donate electrons to the aromatic ring through resonance, stabilizing the negative charge on the oxygen atom.

This electron delocalization makes it easier for salicylic acid to lose a proton, increasing its acidity compared to its constitutional isomer. The presence of resonance allows the negative charge to be spread out over a larger area, reducing the buildup of negative charge on any single atom.

In conclusion, the presence of resonance in salicylic acid leads to its increased acidity compared to its constitutional isomer. Resonance allows for the stabilization of negative charge, making it easier for salicylic acid to lose a proton.

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The concentration of iron (III) ions in the solution is 0.0705 M.

To determine the concentration of iron (III) ions in the solution, we need to use the stoichiometry of the reaction between sodium sulfide (Na2S) and iron (III) nitrate (Fe(NO3)3) and the volumes and concentrations of the reactants.

The balanced equation for the reaction is:

2 Na2S + 3 Fe(NO3)3 → 6 NaNO3 + Fe2S3

From the equation:

2 moles of sodium sulfide react with 3 moles of iron (III) nitrate to form 1 mole of iron (III) sulfide.

2 moles Na2S + 3 moles Fe(NO3)3 = 1 mole Fe2S3

First, let's calculate the number of moles of sodium sulfide and iron (III) nitrate used in the reaction:

Moles of sodium sulfide = volume (in L) × concentration

                       = 0.022 L × 0.34 mol/L

                       = 0.00748 mol

Moles of iron (III) nitrate = volume (in L) × concentration

                         = 0.053 L × 0.22 mol/L

                         = 0.01166 mol

From the stoichiometry of the reaction, we can see that the mole ratio of sodium sulfide to iron (III) nitrate is 2:3. Therefore, the limiting reagent is sodium sulfide because there are fewer moles of sodium sulfide compared to iron (III) nitrate.

Since 2 moles of sodium sulfide react with 1 mole of iron (III) sulfide, we can calculate the moles of iron (III) sulfide formed:

Moles of iron (III) sulfide = (0.00748 mol Na2S) × (1 mol Fe2S3 / 2 mol Na2S)

                          = 0.00374 mol

Finally, we can determine the concentration of iron (III) ions (Fe3+) in the solution. Since 1 mole of iron (III) sulfide corresponds to 3 moles of Fe3+ ions, the concentration is:

Concentration of Fe3+ = moles of Fe3+ / volume (in L)

                     = (0.00374 mol) / (0.053 L)

                     = 0.0705 M

Therefore, the concentration of iron (III) ions in the solution is 0.0705 M.

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Answer:

The ecosystem would collapse.

Explanation:

The food chain is need to keep everything in balance. Each level keeps the level under it in check. Without predators some species might grow in population and overuse their resources thus killing their entire species.

Answer:

D. They form chemical bonds through electron sharing.

Explanation:

The correct characteristic of all ions is that they have a charge. Therefore option B is correct.

An ion is an atom or a molecule that has gained or lost electrons, resulting in an unequal number of protons and electrons. This imbalance of positive and negative charges gives the ion a net electrical charge.

Ions can have a positive charge (called cations) if they have lost electrons, or a negative charge (called anions) if they have gained electrons.

The charge of an ion is essential in determining its behavior and interactions with other ions and molecules. It influences the way ions form chemical bonds and participates in chemical reactions.

The charge of an ion is indicated by a superscript after the chemical symbol, such as Na+ for a sodium cation or Cl- for a chloride anion.

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Answer:

The answer is

Explanation:

The percentage error of the density can be found by using the formula

\(Percentage \: \: error(\%) = \frac{error}{actual \: \: number} \times 100 \\ \)

From the question

actual density = 1.59 g/cm³

error = 1.68 - 1.59 = 0.09

The percentage error is

\(P(\%) = \frac{0.09}{1.59} \times 100\% \\ = 5.66037735...\)

We have the final answer as

Hope this helps you

Answer: False.

Explanation: It is not possible to construct a cell from scratch, for several major reasons: Cell structure and arrangements of cellular components (membranes in particular) are not directly coded in DNA sequence; they represent a sort of “institutional memory” of a cell, and are replicated through a process of cellular division.

There is a relationship between the number of particles and the pressure of the gas.

The pressure of a given mas of gas is proportional to the number of moles. Recall that the number of moles can be obtained from the number of particles using Avogadro's law.

Hence,  there is a relationship between the number of particles and the pressure of the gas.

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There are 50 bananas total in the enormous bunch of bananas.

Visit for more information on a bunch of bananas.

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Sanitary landfills are designed to create an interior environment where almost everything decomposes. However, due to the lack of oxygen in the landfill, decomposition is slow and often generates methane gas.

Sanitary landfills are not always simple to construct and maintain, as they require careful planning and management to prevent environmental damage. Overall, the goal of a sanitary landfill is to contain waste in a way that prevents contamination of surrounding soil and water while allowing for controlled decomposition. Sanitary landfills are built to create an interior environment where almost everything decomposes, which means that organic materials such as food waste, paper, and yard trimmings are broken down by bacteria and other microorganisms.

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The white color on the periodic table represents the physical state of a solid.

A periodic table is an arrangement of the chemical elements that are sorted by their atomic number, electron configurations, and chemical properties. In a row, it depicts periodic trends in the properties of the elements.

A physical state refers to the conditions under which a substance exists. It could exist in three different states; solid, liquid, or gas.

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An atom of the isotope 133 Cs⁺ contains the number of  protons (p), neutrons (n), and electrons (e) is 55 p. 78 n. 54 e.

The Isotopes are the atoms of same element which have the same number of the protons but different number of the neutrons.

The number of protons in cesium = atomic number

                                                         = 55

The number of the electrons for the Cs⁺ ion :

 The number of the electrons    = 54

Atomic mass = number of protons + number of neutrons

The   number of neutrons = atomic mass - number of protons

                                    = 133 - 55

                                    = 78

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Answer:

glycol, any of a class of organic compounds belonging to the alcohol family; in the molecule of a glycol, two hydroxyl (―OH) groups are attached to different carbon atoms. The term is often applied to the simplest member of the class, ethylene glycol.

Explanation:

Answer:

Glycol, any of a class of organic compounds belonging to the alcohol family; in the molecule of a glycol, two hydroxyl (―OH) groups are attached to different carbon atoms. The term is often applied to the simplest member of the class, ethylene glycol.

If the mass of the magnesium oxide collected is 0.224 g then the 0.296g solid magnesium is Limiting reagent.

Magnesium is found naturally in the form of periclase, a white hygroscopic solid mineral known as magnesium oxide or magnesia. Its empirical formula is MgO, and it is made up of a lattice of Mg2+ and O2 ions that are kept together by ionic bonding. Different applications for magnesium oxide exist. As an antacid, some people take it to treat acid indigestion, sour stomach, and heartburn. For quick, short-term bowel emptying, magnesium oxide may also be used as a laxative.

A reactant that is completely consumed at the conclusion of a chemical reaction is known as the limiting reagent. The limiting reactant, also known as the limiting reagent, is the reactant that is used first in a chemical reaction, hence restricting the amount of product that can be produced.

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Answer:

90.3%

Explanation:

Answer:

0.01.

Explanation:

This is because, if you divided one rectangle by ten, it will give 0.1

That is 1/10 = 0.1

If each of the smaller rectangles is divided by 10.

It will be 0.1/10 which will be equal to 0.01.

The rectangles will be 0.01 each.

Answer:

Ingredients OR tenderising

Explanation:

Answer:

The proportionality constant ( Henry’s constant) = 2.32 * 10^-5 M/kPa

Explanation:

Here in this question, we are concerned with calculating the proportionality constant for this gas.

Mathematically, we can get this from Henry law

From Henry law;

Concentration = Henry constant * partial pressure

Thus Henry constant = concentration/partial pressure

Henry constant = 0.00290 M/125 kPa = 2.32 * 10^-5 M/kPa

Answer:

hope it helps

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The free-energy change for the reaction CO2(aq) → CO2(g) can be calculated using the Gibbs free energy equation:

ΔG = ΔH - TΔS

Where:

ΔG is the change in Gibbs free energy

ΔH is the change in enthalpy

T is the temperature in Kelvin

ΔS is the change in entropy

Assuming that the reaction is taking place at 25°C (298 K), the values for ΔH and ΔS can be obtained from thermodynamic tables:

ΔH = 40.7 kJ/mol

ΔS = 163.2 J/mol*K

Converting the units of ΔS to kJ/mol*K, we get:

ΔS = 0.1632 kJ/mol*K

Substituting the values into the Gibbs free energy equation, we get:

ΔG = (40.7 kJ/mol) - (298 K) * (0.1632 kJ/mol*K)

ΔG = 28.1 kJ/mol

Therefore, the free-energy change for the reaction CO2(aq) → CO2(g) at 25°C is 28.1 kJ/mol. This indicates that the reaction is not spontaneous under standard conditions, as the value of ΔG is positive. This means that energy would need to be input into the system in order for the reaction to occur.

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Intermolecular forces such as dipole-dipole forces, London dispersion forces exist between molecules and these depend on strength of electronegativity of molecule. Thus, the correct option is option C.

Intermolecular forces of attraction is force of attraction that make two molecule come closer. Intermolecular forces of attraction is directly proportional to the electronegativity of the molecule.

Size of electronegative molecule is small so, if any other molecule or molecule come into contact with this molecule then this molecule attract the electron of other molecule very efficiently and therefore the force between the molecule increases. Ethyl alcohol CH₃CH₂OH are held together by strong hydrogen bonding.

Thus, the correct option is option C.

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The mass of products resulting from a chemical reaction will always be equal to the mass of the reactants.

In order to answer the question first we must write the atomic number of each element:

Zirconium (Zr): 40

Cadmium (Cd): 48

Iridium (Ir): 77

Iron (Fe): 26

Then, we have to complete the distribution of electrons in each orbital for each atom:

The first 4 levels have the following distribution:

Level1: 1s

Number of electrones: 2

Level 2: 2s, 2p

Number of electrones 8 (2 in the s orbital and 6 in the p orbitals).

Level3: 3s, 3p, 3d

Number of electrones 18 (2 in the s orbital, 6 in the p orbital and 10 in the d orbitals)

Level 4: 4s, 4p, 4d, 4f

Number of electrones 32 (2 in the s orbital, 6 in the p orbitals, 10 in the d orbitals and 14 in the f orbitals)

The order in which the orbitlas are completed depends on the energy of each level. For example the 4s orbitals will be completed before the 3d orbitals because their energy is lower.

The order is as follows:

1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p...

Now, knowing the atomic number we can answer the question:

For Zirconium (total 40 electrones):

2 electrones are predicted in the 4d orbital

For Cadmium (total 48 electrones):

10 electrones are predicted in the 4d orbital

For iridium, as it has an atomic number higher than Cadmium we can predict tha it also complets the 4d orbital, then it has also 10 electrones in it.

For iron (total 26 electrones)

Iron has no electrones in the 4d orbitals