Draw the product for each of the following SN​2 reactions: (a) (S)-2-Chloropentane and NaSH (b) (R)-3-Iodohexane and NaCl (c) (R)-2-Bromohexane and NaCN (d) 1-Bromoheptane and NaOH

To react with Ethane, we need 84 moles of oxygen are required.

The reaction is depicted as follows:

2C₂H₆ + 7O₂ → 4CO₂ + 6H₂O

According to the reaction, the mole ratio of ethane (C₂H₆) to oxygen (O₂) is 2:7.

We have to find the moles of oxygen.

Given that 24 moles of ethane.

24 x 7/2

= 84

As a result, it takes 84 moles of oxygen to react with 24 moles of ethane.

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The heat is required to melt 1.50 mol of gallium at 1 atm pressure is

The given data as follows :

Ga(s) --> Ga(g)    ΔH = 277 kJ /mol

Ga(l)  ---->  Ga(g)   ΔH = 271 kJ/mol

from the given two conditions we can simply subtract the heat of the sublimation to the heat of the vaporization, we get :

Ga(s)  ----->   Ga(l)

ΔH = heat of sublimation - heat of vaporization

ΔH = 277 kJ/mol - 271 kJ / mol

ΔH = 6 kJ/mol

The heat = nΔH

               = 1.50 mol × 6 kJ/mol

               = 9 kJ

Thus, at 1 atm pressure, the heat of sublimation of gallium is 277 kJ/mol and the heat of vaporization is 271 kJ/mol. heat is required to melt 1.50 mol of gallium at 1 atm pressure is 9 kJ.

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The intermolecular forces that are found in carbon disulfide CS2 is two bond diploes.

Intermolecular forces are the forces that are between to of  molecules. And so that's different from an to the relative  intramolecular force, whichever is the force within a molecule.

London dispersion forces supposedly have the least by its  strength out of all the intermolecular forces. But of  CS2, which has only the  dispersion forces, has a higher boiling point (and thus stronger and the  intermolecular forces) than COS, which has dipole-dipole attraction in to the addition to dispersion forces.

I suppose that it had something to do with CS2 having a thicker/more than  inducible electron shell, but it is  then a new question arises: how would you know if the dispersion forces in one molecule are stronger of  that the dipole-dipole forces in another.

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The assertion claims that the graphs of a subject with an unlimited number of options is a single statement.

Reaction equation demonstrate the end results of reactions as well as their formation. They are helpful in predicting reaction products. We can anticipate the outcome of the reaction between magnesium (a metal) and hydrochloric (a acid, of course!) using this method.

In between the formulas of the reactants, a plus (+) symbol is placed. On the right side, the reactions are written in terms on chemical symbols or molecular formulas. The product formulas are separated by a plus (+) symbol.

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A substance with a molar mass of around 60 g/mol with a composition of 3.3% H, 19.3% C, having 77.4% O has the chemical formula CH2O3.

The molecular formula gives the amount of atoms of each element that make up one molecule of a material, giving the number of atoms of each element per molecule of a substance. It shows an accurate count of each atom within a molecule. Propane, for instance, has the chemical symbol C4H10. According to this formula, the offered chemical consists of 4 carbon atoms and 10 hydrogen atoms.

The number of each object's atoms in a substance's molecules is determined by the molecular formula, which is also known as the "molecular formula." It shows an accurate count of each atom within a molecule. As an example

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Each dissociation has a unique Ka and pKa value. When the moles of base added equals half the total moles of base are in equal amounts.

The ratio of CB / WA = 1 and according to the HH equation, pH = pKa + log(1) or pH = pKa.

What is mole?

Amount of matter is a measure of how many basic units of a particular matter are contained in an object or sample is called a mole.

Therefore, Each dissociation has a unique Ka and pKa value. When the moles of base added equals half the total moles of base are in equal amounts. Amount of matter is a measure of how many basic units of a particular matter are contained in an object or sample is called a mole.

The ratio of CB / WA = 1 and according to the HH equation, pH = pKa + log(1) or pH = pKa.

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The pH of the solution is now obtained as 10 after deprotonation.

We know that the pH has to do with the degree of the acidity or the alkalinity of system. Now we know that the pH can be measured by means of a pH meter.

In the body, there are a lot of biological molecules that work together to make the body to function effectively. Of all of these compounds, the most abundant of the biological molecules that are important in the body are the protein molecules.

The protein molecule is composed of the amino acids. Now we know that the amino acids can be protonated or deprotonated and the pH of the system would depend on whether the amino acid is protonated or deprotonated. The deprotonation of the substrate would make it much more basic.

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Missing parts;

Consider a di-glycine dipeptide (e.g. two glycine amino acids that have been covalently bonded together via a peptide bond). If the amino group is neutral and the C-terminal carboxy group is deprotonated, which pH value do you expect is most consistent with these observations?

Group of answer choices

a. 1

b. physiological pH

c. 3

d. the pKa of an aspartic acid side-chain carboxylate

e. 10

Answer:

CH₃C(CH₃)₂CH₂CH₃

Explanation:

2,2-Dimethylbutane has a four-carbon chain with two methyl groups on C-2. The condensed structural formula is CH₃C(CH₃)₂CH₂CH₃. Note that the two CH₃ groups are enclosed in parentheses after the carbon atom to which they are attached.

The molecular weight of the solid acid in units of g/mole is 25 g/mol

given that :

mass of the solid acid =0.630 g

volume = 40.4 mL = 0.04 L

moles =  molarity × volumes in liter

moles = 0.630 × 0.04 L

          = 0.0252 mol

the molar mass formula is given as:

molar mass = mass / moles

molar mass = 0.630 g / 0.0252 mol

molar mass = 25 g/mol

Thus, carrying out an experiment to determine the mw of a solid acid with the generic formula H₃A. you weigh out 0.630 g of the solid acid in a weigh boat and transfer it to a 125 ml Erlenmeyer flask. after dissolving the acid in 25 ml of distilled water, you add 15.44 ml of 0.335 m Sr(OH)₂(aq) solution . the molecular weight of the solid acid in units of g/mole is 25 g/mol.

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Answer:

43.8 g of iron can be recovered

Explanation:

First get the mass of Fe3O4 in the ore:

80g Ore * (76 g Fe3O4 / 100 Ore) = 60.8 g Fe3O4

Then get number of moles of Fe3O4:

60.8 g Fe3O4 * 1 mol / 231.535 g = 0.262 mol Fe3O4

**231.535 g is the molar mass of Fe3O4

Then get number of moles of Fe:

0.262 mol Fe3O4 * (3 Fe / 1 Fe3O4) = 0.786 mol Fe

** 3 atoms of Fe in every Fe3O4

Finally convert moles of Fe to grams of Fe:

0.786 mol * 55.845 g/mol = 43.79 g Fe --round to 3 sig figs--> 43.8 g Fe

There are 8 electrons from each oxygen atoms. Hence oxygen molecule contains a total of 16 electrons in which 10 are bonding and 6 are antibonding electrons.

According to the molecular orbital theory, atomic orbitals overlaps to form molecular orbitals. Molecular orbitals are of different identity from that of atomic orbitals. There are both bonding and antibonding molecular orbitals.

The molecular orbital electronic configuration of oxygen molecule is written as :

[tex]\sigma 1s^{2} , \sigma^{*} 1s^{2}, \sigma 2s^{2} ,\sigma^{*} 1s^{2} , \pi2px^{2}, \pi2py^{2}, \sigma 2pz^{2}, pi2px^{1}, \pi2py^{1}[/tex].

There are total 16 electrons in which 10 are in bonding electrons and 6 are non-bonding electrons.

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The molarity of a solution of 116.9g of Nacl in 1l water is 2M.

What is molarity of a solution?

A solute's molar concentration is the quantity of that solute in one unit of a solution. It can be measured in mol/L, mol/dm3, or mol/m3. Molarity is the number of moles of solute present per liter of solution

Here,

We know molarity of a solution = moles of solute/litres of a solution

No of moles in 116.9g of nacl=2 (since 1 mole of Nacl=58.5g)

Volume of water= 1l

Therefore molarity of the solution is 2mol/1l= 2M

Hence the molarity of a solution of 116.9g of Nacl in 1l water is 2M.

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Bonding forces are stronger than intermolecular forces, for molecular substance, strength of the intermolecular forces determines physical properties of phases, Intermolecular forces involve partial or small charges that are far apart and are relatively weak.

Intermolecular force is the force that mediates interaction between molecules including electromagnetic forces of attraction or repulsion which acts between atoms and neighboring particles (atoms or ions).

Bonding forces are the forces of attraction or repulsion which acts between neighboring particles like atoms, molecules or ions. Bonding force determines the elastic modulus (Young's modulus) of a material.

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Barium nitrate(BaNO3)+sodium sulfate(Na2SO4)---> Barium sulfate(BaSO4)+ sodium sulphate(Na2SO4).Thus 1 mole of Barium nitrate will yield one mole of Barium sulfate ;

Total Volume= 1L

Concentrarion in Molarity=1.55(M)

Now we know Molarity=Moles of Solute/Volume of solution in L

Therefore,no of moles=1.55 moles

Now,No of moles= grams of barium sulfate taken/Molecular Mass

MM=233.40g/mol(given

Thus,grams of barium sulphate taken=No o moles x MM =1.55 x 233.40=361.77 g,which is the required grams of barium sulfate.

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There are a total of 10 valence electrons in the C2²⁻Lewis structure. Each carbon atom contributes four valence electrons, while the second atom adds two more for a total of 10 valence electrons. The two Carbon atoms' octets in the Lewis structure of C2²⁻ must be filled with a triple bond.

How many unpaired electrons are in C2²?

There aren't any unpaired electrons in it.

How many electrons are present in C2²?

Twelve electrons make up the C2 molecule.

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A change in the molecule's dipole moment brought on by vibrations caused by IR radiation absorption is required for a molecule to be IR active.

(Dipole moment = 2*charge × length)

1. Here C=O is already a polarized bond due to the difference in electronegativities of C and O. Hence the C=O stretch is IR active since the vibrations from absorbing IR radiations will change the dipole moment of the molecule

2. Since both sides of the carbon triple bond is different, effective charge on both carbons will be different and hence the vibrations will cause change in dipole moment of the molecule which makes the molecule IR active

3. Here both sides of the carbon triple bond are same(symmetrical molecule) the effective charge on both sides are same hence vibrations will not change the dipole moment and hence the molecule is IR inactive

4. C-Cl bond is already polarized, so a dipole moment already exists and vibrations upon IR absorption will change the dipole moment of the molecule. Hence the molecule is IR active

5. Trans-3-hexene is a symmetrical molecule hence the vibrations along C=C will not cause a change in the dipole moment of the molecule . Hence the molecule is IR inactive

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In the given molecular art options, option B and F are elements and option A, C, D and E are compounds.

Elements refer to pure substances which are composed of only one type of atom. It refers to a class of substances that cannot be separated into simpler substances by chemical means. In the given molecular structures, option B and F are elements as they made up of single type of atoms. Compounds refer to substances which are formed by two or more different types of elements that are united chemically in fixed proportions. When the elements combine together, they react with each other and form chemical bonds as a result of sharing or exchanging electrons between atoms which are difficult to break. As molecular structures, option A, C, D and E are made up of different type of atoms, they are compound.

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1.answer --->In methanol and water hydrogen bonding is present. 2.answer------>level of liquid in left arm is increases. Because solvent flows towards solution through semipermeable membrane during osmosis. 3.answer---->order of reaction with respect to [NO ] is 2, When methanol dissolves in water; intermolecular forces (IMFs) are formed between the solute and solvent molecules H~ TTH H_0-H methanol (CH3OH) water (HzO)

Methanol, the most basic form of alcohol (CH3OH), serves as the chemical basis for countless items used in daily life, such as paints, plastics, automobile components, and building supplies. In addition, methanol is a clean energy source that powers fuel cells, boilers, ships, vehicles, trucks, buses, and cook stoves. Methanol is a highly toxic substance. For a youngster, even 2 tablespoons (30 milliliters) can be fatal. Adults can die from drinking as little as 2 to 8 ounces (60 to 240 milliliters). Despite medical intervention, blindness is frequently permanent.

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Statements that correctly describes the viscosity of a liquid : viscosity decreases with increasing temperature, viscosity is a resistance to flow and liquid with stronger intermolecular forces will have a higher viscosity.

Viscosity describes the internal friction of moving fluid. Fluid with large viscosity resists motion because molecular makeup gives a lot of internal friction.

Things that determine the viscosity are: fluid temperature, flow conditions and pressure. Viscosity  of fluid is a measure of resistance to deformation at a given rate.

Viscosity is determined by structural properties of the molecules and raising the temperature reduces viscosity of the solution or fluid.

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Answer:

C. Nitrogen (N) has the same number of valence electrons as neon Ne. Both elements have a total of 8 valence electrons in their outermost energy level.

Explanation:

The element neon has the atomic number 10, which means it has 10 electrons in its outermost energy level. The element that has the same number of valence electrons as neon is therefore also the element that has the atomic number 10, which is neon itself. The other elements listed (carbon, phosphorus, nitrogen, and oxygen) have atomic numbers 6, 15, 7, and 8 respectively, so they do not have the same number of valence electrons as neon.

pH = 4.3. The hydrogen ion shown above H⁺ is equivalent to the hydronium ion shown.

This material is an ion because it has a charged and is made up of a hydrogen atom with a charge (H+) added. Its formula is H3O+, and it is referred to as the hydronium ion. Whenever an acid comes into contact with water, the hydronium ions are always created. generating H3O+, the acid's H+, by continuously reacting with the adjacent water molecule.

In all alkaline aqueous solutions, the hydroxide ion ion (H3O+), also referred to as nucleophile water, is present. Brnsted acids release one or more of their electrons as h+ ions, which combine with water molecules.

HOCL ⇆ H⁺ + 0CL⁻

Kₐ =H⁺ * 0CL⁻/HOCL

Ka of HOCl = 2.9×10⁻⁸

Kₐ = x²/C

2.9×10⁻⁸ = x²/ 0.100M

x = H⁺= 5.4 * 10⁻⁵

pH = -log H⁺ = 4.3

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The enthalpy of formation of oxygen is zero because the enthalpy of formation any compound to form its elemental state is zero.

Here in this case, because oxygen is present in its elemental state it has zero enthalpy of formation because it does not require any energy to occur in a naturally occurring state.

Not only oxygen if any other compound is present in its naturally occurring state then it will have zero enthalpy of formation.

Because it does not require any amount of energy for any element to occur in its elemental state.

So, this is why we are concluding that because oxygen is present in its elemental state it has 0 enthalpy of formation.

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On the Xenon atom (Xe) and both of the Iodine atoms, there are three lone pairs and the molar mass of sample is 86.83g/mole..

(a) The central Xenon atom (Xe) of the XeI2 Lewis structure is surrounded by two Iodine atoms. The Xenon atom (Xe) and each iodine atom are connected by two single bonds.

(b) Given that a gaseous sample's mass(m) is 0.3876 grams.

This sample's volume (v) is 142 ml, = 0.142 L, and its temperature (t) is 150 °C, = 150 + 273 , = 423 K

pressure (p) equals 1.09174 atm or 775 torr.

As a result of the equation pv = nRt, n=m/M and M = mRt/pv, which equals 0.3876x0.0821x423/1.0917x0.142, = 13.46068908/0.1550214, = 86.83g/mole.

The resulting molar mass is 86.83g/mole.

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The polar and neutral, non-polar, positively and negative charged amino acids are as follows -

Gln is polar.

C4H6O4N, aspartate, glutamate, is negatively charged, C9H7O3N, arginine, lysine, is positively charged,

hydrophobic amino acids, leucine and C3H7O2N are non polar amino acids.

Amino acids are the compounds having carboxyl and amino terminal at each end. They fold together to form secondary structures such as alpha helix, beta sheets and others. Upon more folding and turning they acquire three and four dimensional structure which imparts functional activity to the proteins.

Amino acids can be polar, non-polar, postively or negatively charged. The net ionic charge decides their postively or negatively charge. Also, aliphatic groups make the amino acids non-polar while presence of oxygen, sulphur, nitrogen gives polar character.

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The complete question is attached in figure.

1062.3 KJ heat is absorbed or released in the reaction of 20.0 g of nh3 with sufficient oxygen to produce no (g) and h2o (l).

The heat absorbed or released in the reaction of 20.0 g of NH3 with oxygen to produce NO and H2O depends on the specific conditions of the reaction and the enthalpy change associated with the reaction.

The general equation for the reaction of NH3 with oxygen to produce NO and H2O is:

4NH3 + 5O2 -> 4NO + 6H2O

The enthalpy change for this reaction, which is the heat absorbed or released during the reaction, can be calculated using the enthalpy changes of formation of the reactants and products. The enthalpy change of formation is the heat absorbed or released when a substance is formed from its elements in their standard states.

The enthalpy change of formation of NH3 is -46.2 kJ/mol, the enthalpy change of formation of O2 is 0 kJ/mol, the enthalpy change of formation of NO is +90.3 kJ/mol, and the enthalpy change of formation of H2O is -285.8 kJ/mol.

To calculate the enthalpy change for the reaction, we can use the following equation:

ΔH = (4 x -46.2 kJ/mol) + (5 x 0 kJ/mol) - (4 x +90.3 kJ/mol) - (6 x -285.8 kJ/mol)

This gives us an enthalpy change of -902.8 kJ/mol.

To convert this to the heat absorbed or released for 20.0 g of NH3, we need to multiply by the number of moles of NH3 used in the reaction. The molar mass of NH3 is 17.0 g/mol, so 20.0 g of NH3 is equal to

20.0 g / 17.0 g/mol = 1.18 moles of NH3.

The heat absorbed or released in the reaction of 20.0 g of NH3 with oxygen to produce NO and H2O is therefore -902.8 kJ/mol x 1.18 moles = -1062.3 kJ.

This means that the reaction absorbs 1062.3 kJ of heat from the surroundings.

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Consider the decomposition of ammonium chloride at a certain temperature NH4Cl (s) <=> NH3 (g) + HCl (g). The equilibrium constant Kp is 4.4, if the total pressure is 2.2 atm at that temperature.

When a chemical process reaches equilibrium, the equilibrium constant (often represented by the letter K) sheds light on the interaction between the reactants and products. For instance, the ratio of the concentration of the products to the concentration of the reactants, each raised to their respective stoichiometric coefficients, can be used to establish the equilibrium constant of concentration (denoted by Kc) of a chemical reaction at equilibrium. It is significant to remember that there are several kinds of equilibrium constants that establish relationships between the reactants and products of equilibrium reactions in terms of various units. The ratio of reactant to product amounts that is used to predict chemical behavior is the definition of the equilibrium constant for a chemical process. In a state of equilibrium, the forward reaction rate equals the backward reaction rate. The rate constants are constant at a certain temperature. An equilibrium constant is the ratio of the forward reaction rate constant to the backward reaction rate constant, which must be a constant (Kequ).

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Iodine molecules will be forced to cling together by this force since it is so powerful. The iodine molecule is therefore extremely tough to break. Iodine has a higher boiling point as fluorine as a result.

What exactly is boiling point?

The temperature when a liquid's vapor pressure equals that tension of the gas below it is known as the boils point of the liquid. The degree at which a liquid's vapor pressure equals one atmosphere is called the liquid's typical boiling point (760 torr). The view from a distance. view from a distance of a bubbles in boiling water.

High boiling point: What does that mean?

It measures the point where a chemical boils, to put it simply. A higher the boiling point denotes stronger intermolecular forces, similar to the melting point.

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the net ionic equation when a solution of silver nitrate is mixed with a solution of sodium phosphate is silver nitrate(aq) + sodium phosphate(aq) → silver phosphate(s) + sodium nitrate(aq AgNO3(aq) + NagPO4(aq).

The net ionic equation is a synthetic calculation that only exhibits the components, substances, and ions that are involved directly in the chemical reaction. A net ionic formula illustrates only the chemical involved in a response, whereas a full ionic equation depicts the spectator ions as well. If there is no gross ionic equation to rebalancing, you encounter what is known as a molecular equation (or a complete molecular equation). These are more challenging to balance because the elements that are reduced and oxidised were also mixed in with substances that are not being lowered or oxidised.

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[tex]Al^{3+}[/tex] is considered as strongest lewis acid among the following.

A stronger acid, in contrast to a stronger Lewis acid, has a reduced [tex]pK_{a}[/tex] value and a stronger propensity to take a pair of electrons, according to Bronsted and Lowry. Therefore, it is possible to think of the ionization potential, electron affinity, electronegativity, and electrophilicity as indicators of a Lewis acid's strength.

Lewis acids are thought to be entities that lack electrons. Lewis bases are regarded as electron-rich species. More positive charge means more electron shortage, which increases acidity.

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Answer:

For CO:

Formal charge of C = 4 - 2 - 6/2 = -1

Formal charge of O = 6 - 2 - 6/2 = +1

2. For CO₂:

Formal charge of C = 4 - 0 - 8/2 = 0

Formal charge of each O = 6 - 4 - 4/2 = 0

3. For CO₃²⁻:

Formal charge of C: 4 - 0 - 8/2 = 0

Formal charge of two O's single-bonded to C = 6 - 6 - 2/2 = -1

Formal charge of the O double-bonded to C = 6 - 4 - 4/2 = 0