2. Draw the Lewis dot structures for each of the following molecules:
a. H₂S
C. SO3
b. CH₂Br₂
d. HCN

Answer:

i am quite unsure what you want me to answer but if you explain it to me w ould live to help

Explanation:

Boyle's Law, which states that at constant temperature, a gas's pressure and volume are inversely related, can be used to address this issue.

Boyle's Law says that P1V1 = P2V2.

Where: P1 = The gas's initial pressure (in torr)

V1 is the container's initial volume (in millilitres).

P2 stands for the gas's post-volume change pressure (unknown).

V2 is the revised volume of the container (in millilitres).

Let's solve for P2 by entering the provided values into the equation:

P₁ = 757.2 torr

V2 = 132.5 mL V1 = 81.4 mL

P2 = ambiguous

P₁V₁ = P₂V₂

P2 equals 757.2 torr x 81.4 mL x 132.5 mL.

P2 times 132.5 mL = 61702.08 torr * mL

61702.08 torr = P₂ * 132.5

P2 = 132.5 mL / 61702.08 torr

P₂ ≈ 465.69 torr

as a result, the gas's pressure

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Baking a loaf of bread and cooking an egg are only physical changes. Therefore, the correct option is option A.

A physical change gets a sort of change whereby the composition of matter is changed but not transformed. Although matter's size or shape may change, no chemical reaction takes place. Usually, physical changes are reversible. It should be noted that reversibility is not necessarily a need for a process to qualify as a physical change. Baking a loaf of bread and cooking an egg are only physical changes.

Therefore, the correct option is option A.

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Intermolecular forces are the interactions between two molecules. They can be of different types, including dipole-dipole interaction, London dispersion forces, and hydrogen bonding. The strength of intermolecular forces is determined by the nature of the particles involved.

The substance that is expected to have the weakest intermolecular forces when in the solid phase is helium (He). Helium is an element that belongs to the noble gases group, which is the least reactive element group because it already has a full valence electron shell configuration that satisfies the octet rule. Hence, the noble gases exist as individual atoms that have a monoatomic form.

The London dispersion force is a weak intermolecular attraction that arises from the formation of instantaneous dipoles in atoms or molecules. The strength of London dispersion forces depends on the polarizability of atoms or molecules. The higher the polarizability, the stronger the dispersion forces. Therefore, the substance that has a weak polarizability, like helium, is expected to have the weakest intermolecular forces.

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Iodine ions are oxidized to form iodine when the chlorine gas is bubbled in the solution of potassium iodide.

When chlorine gas is bubbled into a solution of potassium iodide, some amount of the iodide ions are oxidized and changed into iodine which leads to the formation of beautiful violet color of iodine. This colour can be seen as the iodine dissolves in the carbon tetrachloride layer.

While on the other hand, when the high concentration of chlorine is bubbled into the solution of potassium iodide, the iodine reacts and formed iodine monochloride which is ruby red so we can conclude that iodine ions are oxidized to form iodine when the chlorine gas is bubbled in the solution of potassium iodide.

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If my lab partner is interested in studying how industrial chemicals pollute the environment, I would recommend him to take specialization in the field of environmental chemistry.

Environmental chemistry is a branch of chemistry of utmost importance as it deals with the various impacts that are caused upon the environment by chemicals  released from industries and day to day activities.

I would recommend my lab partner to take courses of analytical chemistry, physical, inorganic and organic chemistry as well in order to investigate in depths of environmental chemistry. All these fields are needed to be studied in order to study about the occurrence of environmental pollution by industrial chemicals.

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Answer:

An increase in temperature typically increases the rate of reaction because an increase in temperature will raise the average kinetic energy of the reactant molecules. Therefore, a greater proportion of molecules will have the minimum energy necessary for an effective collision.Increasing the temperature increases reaction rates because of the disproportionately large increase in the number of high energy collisions. It is only these collisions (possessing at least the activation energy for the reaction) which result in a reaction.

Explanation:

Can you please give this answer a brainliest answer please

The theoretical yield of aspirin is 1.23 g

Aspirin is a common drug with many uses. It relieves pain and reduces the risk of serious problems such as heart attack and stroke. It comes in many forms, including:

It is important to remember that aspirin alone does not lower blood pressure. However, its ability to thin the blood may benefit some people with high blood pressure.

moles of salicylic acid = mass / molar mass

=> 0.9457 / 138.2 = 0.006843 mol

Acetic anhydride is in excess. Thus salicylic acid is the limiting reactant.

Total moles of aspirin that can form = moles of salicylic acid = 0.006843

mass of aspirin = number of moles of aspirin x molar mass of aspirin

= 0.006843 mol x 180.16g/mol = 1.23g

Thus theoretical yield of aspirin = 1.23 g

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Answer:

Lithium Fluoride.

Explanation:I know science.

Answer:

1.The main difference between SPECT and PET scans is the type of radiotracers used. While SPECT scans measure gamma rays, the decay of the radiotracers used with PET scans produce small particles called positrons. ... These react with electrons in the body and when these two particles combine they annihilate each other.

2 .A single photon emission computed tomography (SPECT) scan is an imaging test that shows how blood flows to tissues and organs. It may be used to help diagnose seizures, stroke, stress fractures, infections, and tumors in the spine.

3.Uses for PET scan include checking brain function; diagnosing cancer, heart problems, and brain disorders; examining blood flow to the heart; and determining spread of cancer and response to therapy. The use of PET scans may help doctors more accurately detect the presence and location of cancer cells.

4.Stress-only SPECT protocols resulting in lower dosimetry and less time in the imaging laboratory may be appropriate for many patients. PET perfusion imaging offers indisputably better images that are characterized by higher resolution, better attenuation correction, less scatter, and better contrast

Hope I wasn't too late.

Answer:

d. forced migration

Explanation:

Certain hazardous occurrences affect living organisms in their natural habitat. One of those occurrences is forest fire. Forest fire or vegetation fire is an uncontrollable break out of fire in a vegetation, affecting the inhabitants of the area.

The occurrence of a forest fire will lead to a forced migration of organisms from their natural habitat. Animals and other mobile organisms will be forced to leave behind their devastating habitat and migrate to a less threatened area in order to survive.

Answer:

D

Explanation:

The guy above is correct but I’m saying this for those who don’t want an explanation

The correct statement is combustion reaction is an exothermic process where δh is negative.

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Answer:

by determining or looking up the electron configurations of the main group elements.

Explanation:

The valence electrons participate in chemical reactions. ... You can also find the core and valence electrons by determining or looking up the electron configurations of the main group elements.

The correct answer is: the concentration of hydrogen ions in a solution. pH is a measure of the acidity or alkalinity (basicity) of a solution.

It indicates the concentration of hydrogen ions (H+) present in a solution. A solution with a low pH value is considered acidic, while a solution with a high pH value is considered alkaline (basic). The pH scale ranges from 0 to 14, with 7 being neutral. In acidic solutions, the concentration of hydrogen ions is higher than the concentration of hydroxide ions, resulting in a pH value less than 7. In alkaline (basic) solutions, the concentration of hydroxide ions is higher than the concentration of hydrogen ions, resulting in a pH value greater than 7. pH serves as a measure of the relative concentration of hydrogen ions in a solution, which allows us to quantify the acidity or basicity of the solution.

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A concept can help you translate solutions and related data into basic themes is a false statement.

Basic Concepts are those nouns, verbs, and prepositions that let us understand and describe the world. In the context of the home, kindergarten, and school, these ideas are typically learnt as an essential component of the process of language acquisition.

Therefore, note that Action research is the process of carrying out research and turning the results into useful information that practitioners can use to solve issues and boost organizational effectiveness.

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See full question below

A concept can help you translate solutions and related data into basic themes. True or false

Answer:

Answer: 8 protons and 8 neutrons

Explanation:

The mass number of oxygen is 16

Atomic number is 8

but proton number = atomic number = 8 protons

\(neutrons = mass \: number - atomic \: number \\ \)

neutrons = 16 - 8 = 8 neutrons.

The nucleus of an atom of oxygen typically contains 8 protons and 8 neutrons specifically. So, none of the above options is correct.

The atomic number may be defined as the number of a chemical element in the periodic table through which the elements are arranged in order of increasing the number of protons in the nucleus.

The atomic number of an element = The number of protons in the nucleus of an atom.

Now, according to the question,

If Oxygen has an atomic number of 8, that means the number of protons = 8.

The number of neutrons can be calculated as follows:

Neutrons = mass number - the atomic number.

                = 16 - 8 = 8 neutrons.

Therefore, the nucleus of an atom of oxygen typically contains 8 protons and 8 neutrons specifically. So, none of the above options is correct.

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Answer:0.2496m³/day

Explanation:

Answer:

The letter I

Explanation:

H, I, J, K, L, M, N, O, P

Answer:

Ahhhhhhhhhhhhhhh. Me too. I really needed to hear that today.

Explanation:

thanks for that.

Explanation:

Avogadro's number. What can be said about 1 mol Ag and 1 mol Au? ... They contain the same number of atoms.

1 mole of Ag and 1 mole of Au contain the same number of particle. Therefore, option B is correct.

The International System of Units uses the mole (symbol: mol) as the unit of material quantity. How many elementary entities of a particular substance are present in an object or sample is determined by the quantity of that material. It is specified that the mole contains exactly 6.022140761023 elementary entities.

A mole is defined as the mass of a substance that has the same number of elementary particles as there are atoms in precisely 12.000 g of 12C.

In the periodic chart, group 11 includes the chemical elements roentgenium (Rg), copper (Cu), silver (Ag), and gold (Au). However, no chemical tests have yet been done to demonstrate that roentgenium behaves similarly to the heavier homologue of gold.

Thus, option B is correct.

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The total interaction energy in units of eV/atom assuming λ = 4156 eV and R_0/rho = 12 is 150N eV/atom.

Given Potential for two inert gas (Xe) atoms at separation R :

U=λe^(-R/rho)-R^6/a^6

a) To calculate the potential energy of the two atoms at equilibrium separation R_0,

we have to put dU/dR = 0λ e^(-R_0/rho) = (6R_0^6)/(a^6)λ e^(-R_0/rho) = (6(12rho)^6)/(a^6)

Therefore, λ = (6(12rho)^6)/(a^6) * e^(12)

The potential energy can be expressed as, U=λe^(-R_0/rho) = ((6(12rho)^6)/(a^6)) * e^(12) * e^(-12rho/rho)= ((6*12^6)/a^6) * e^(-11rho)

b) Given R_0 = 12rho, λ = (6(12rho)^6)/(a^6) * e^(12)

Therefore, λ = (6(12rho)^6)/(a^6) * e^(12) = (6 * 12^6)/(a^6) * e^(12) * e^(-12) = (6 * 12^6)/(a^6)

Potential energy U = λe^(-R_0/rho) = (6 * 12^6)/(a^6) * e^(-11rho)c)

The total interaction energy in units of eV/ atom assuming λ = 4156 eV and R_0/rho = 12

Therefore, λ = (6(12rho)^6)/(a^6) * e^(12) = (6 * 12^6)/(a^6) * e^(12) * e^(-12) = (6 * 12^6)/(a^6)

Total energy (U) = (N/2)U = (N/2)λe^(-R_0/rho) = (N/2)(6 * 12^6)/(a^6) * e^(-11rho) = 150N eV/atom.

Therefore, the total interaction energy in units of eV/atom assuming λ = 4156 eV and R_0/rho = 12 is 150N eV/atom.

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Answer:

Crushing or grinding increases the surface area of the salt that is exposed to the molecules of water. Stirring increases the speed at which the particles of salt come in contact with the water molecules.

Answer:

56.2 g

Explanation:

To find the number of moles of H₂O required, we need to determine the molar ratio between H3PO3 and H₂O in the balanced equation.

From the balanced equation:

P2O3 + 3H₂O → 2H3PO3

We can see that 2 moles of H3PO3 are produced from 3 moles of H₂O.

To calculate the number of moles of H₂O, we can set up a proportion using the molar ratios:

2 moles H3PO3 / 3 moles H₂O = 164 g H3PO3 / x moles H₂O

Cross-multiplying the proportion, we have:

2 moles H3PO3 * x moles H₂O = 3 moles H₂O * 164 g H3PO3

2x = 3 * 164

Simplifying:

2x = 492

x = 492 / 2

x = 246

Therefore, 246 moles of H₂O are required.

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Answer:

3

Explanation:

Answer:

yes

Explanation:gergrgregbfbwerbebw

Answer:

1

Explanation:

Ag+

From the given reaction, it is clear that, Ag is gaining electrons from the base NH₃ . Hence, according to Lewis concept of acids and bases, Ag⁺ is the Lewis acid.

There are various concepts to define acids and bases. Among which the first was Arrhenius theory. This theory states that, acids are substances which can furnish H+ in solution and bases are substances giving OH- in solution.

Then Bronsted- Lowry concept states acids as proton donor and bases as proton acceptors. The most applicable theory for acids and bases is Lewis concept.

According to Lewis theory of acids and bases, acids are electrons acceptors and bases are electron donors.

The given reaction is written as:

\(\rm Ag^{+} + 2NH_{3} \rightarrow Ag(NH_{3})_{2}\)

Here, Ag⁺ is the Lewis acid which accepts an electron from the Lewis base NH₃.

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The gas that does not bind to the porphyrin ring Fe (II) ion in myoglobin is option E) H2S. Myoglobin is a protein that is found in muscles and plays a crucial role in storing and transporting oxygen.

The heme group present in myoglobin contains an iron ion that is surrounded by a porphyrin ring. This iron ion is responsible for binding to oxygen and facilitating its transport. However, some gases like CO, NO, and O2 can also bind to this iron ion, which can have adverse effects on the body. Carbon monoxide CO and nitric oxide NO have a higher affinity for binding to the iron ion than oxygen, which can lead to oxygen deprivation in the body. In contrast, carbon dioxide CO2 can bind to a different site on the protein and assist in the release of oxygen. However, hydrogen sulfide H2S does not bind to the porphyrin ring Fe (II) ion in myoglobin and therefore does not interfere with oxygen transport.

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In the decomposition of cobalt (II) chloride, chlorine is being oxidized.  In the decomposition of cobalt (II) chloride, the cobalt (II) chloride compound is being decomposed into its constituent elements, cobalt and chlorine.

The balanced chemical equation for this reaction is:

CoCl2 (s) → Co (s) + Cl2 (g)

As we can see from the chemical equation, cobalt (II) chloride (CoCl2) is being broken down into cobalt (Co) and chlorine gas (Cl2). Since cobalt is going from a +2 oxidation state in cobalt (II) chloride to 0 oxidation state in elemental cobalt, it is being reduced. On the other hand, chlorine is going from -1 oxidation state in cobalt (II) chloride to 0 oxidation state in elemental chlorine, it is being oxidized.

Therefore, in the decomposition of cobalt (II) chloride, chlorine is being oxidized.

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Answer:

B) Cu(S)

Explanation:

Copper is the best conductor of electricity.