Which of the following options correctly describe the preparation of nitriles from alkyl halides? Select all that apply.
A) This reaction proceeds via an SN2 mechanism.
B) The alkyl halide acts as the nucleophile in this reaction.
C) This reaction results in the addition of a two-carbon chain to the alkyl halide.
D) NaCN is a common reagent used in this reaction.
E) Methyl and primary alkyl halides are the best substrates for this type of reaction.

Answer:

A small positively charged nucleus surrounded by revolving negatively charged electrons in fixed orbits

Answer:

It forms 2 single sigma bonds with 2 hydrogen atoms and double (1sigma and 1pi bonds with oxygen atoms. They are convalent

Answer:  The fastest rate of mitosis is in the epidermis

Explanation:

No, pure liquid water cannot exist at 110°C. Phases are dependent on both temperature and pressure. More specifically, water boils at 100°C at a pressure of 1 atm. If the pressure was lower, the temperature needed to boil water would be higher.

Pure water has a boiling point of 100°C at atmospheric pressure. However, the phases of water depends on the temperature and pressure of the water sample.

At lower pressure, water boils at a higher temperature while at a higher pressure, water boils at lower temperature.

Summarily, Pure water can not exist as a liquid at 110°C, it must have been converted into vapour. Unless the water is impure.

https://brainly.com/question/2153588

Answer: D

Explanation: Firstly, you have to complete the charge. You have to get e equal to 2e. So you multiply the second line by 2. Therefore you get

2Ag+ 2e>2Ag. And the Ni line would stay the same. Therefore you combine the elements from before the arrow and then combine the elements after the arrow. Therefore, you get answer D.

The four acids will require the same volume of the base to reach the equivalence point.

Strong acids completely ionize in waters while weak acids are only partially ionized in waters.

At 0.5 M concentration, the hydrogen ion concentrations of all four acids would be the same.

This means that each of the acids will require an equal volume of base concentration in order to get neutralized.

More on neutralization reactions can be found here: https://brainly.com/question/20038776

Answer: he shot tiny alpha particles throug a piece of gold foil.

Explanation:

The absorbance of the buffered indicator solution can be calculated using the equation above.

To calculate the absorbance of an unbuffered indicator solution and a buffered indicator solution, we need to use the Beer-Lambert Law, which relates the absorbance (A) of a solution to the molar absorptivity (ε), the path length (b), and the concentration (c) of the absorbing species.

The Beer-Lambert Law can be written as:

A = ε * b * c

Given:

ε(HIn) = 7120 M^(-1)cm^(-1)

ε(In) = 961 M^(-1)cm^(-1)

b = 1.00 cm

Total indicator concentration = 8.0 * 10^(-5) M

(a) For an unbuffered indicator solution:

We need to calculate the absorbance using the molar absorptivity of the weak acid form (HIn).

c(HIn) = Total indicator concentration = 8.0 * 10^(-5) M

A(HIn) = ε(HIn) * b * c(HIn)

= 7120 M^(-1)cm^(-1) * 1.00 cm * 8.0 * 10^(-5) M

= 0.5696

Therefore, the absorbance of the unbuffered indicator solution is 0.5696.

(b) For a buffered indicator solution:

To calculate the absorbance, we need to consider the equilibrium between the weak acid form (HIn) and its conjugate base (In) using the Henderson-Hasselbalch equation:

pH = pKa + log([In]/[HIn])

Given:

pH = 6.5 (buffered solution)

K_a = 1.42 * 10^(-5)

From the Henderson-Hasselbalch equation, we can solve for the ratio [In]/[HIn]:

[In]/[HIn] = 10^(pH - pKa)

= 10^(6.5 - (-log10(K_a)))

= 10^(6.5 + 5.85)

= 10^(12.35)

Since [HIn] + [In] = Total indicator concentration, we can express [HIn] in terms of [In]:

[HIn] = Total indicator concentration / (1 + [In]/[HIn])

= Total indicator concentration / (1 + 10^(12.35))

Substituting the values into the Beer-Lambert Law equation for the buffered solution:

A = ε(HIn) * b * [HIn]

= 7120 M^(-1)cm^(-1) * 1.00 cm * (Total indicator concentration / (1 + 10^(12.35)))

A = 7120 M^(-1)cm^(-1) * 1.00 cm * (8.0 * 10^(-5) M / (1 + 10^(12.35)))

Therefore, the absorbance of the buffered indicator solution can be calculated using the equation above.

Learn more about indicator here:

https://brainly.com/question/12489874

#SPJ11

Answer:i think it is 350°F

Explanation:

Answer:

A -- incidence -- the occurrence, rate, or frequency of a disease, crime, or something else undesirable.

Explanation:

Answer:

D or the 4th one

Explanation:

mass is literally the measure of matter in an object which is essentially the weight or how much stuff there is.

Answer:

C:)

Explanation:

Answer:

B. Presented in all matter!

Answer:

B- presented in all matter :)

Explanation:

good luck!

The rate constant of the first-order half-life reaction is 0.023 / sec or ln(2)/30 sec.

The formula for a first-order half-life reaction is t = (1/k) [ ln (initial concentration/final concentration)].

For determining the rate constant k, we can easily substitute the given t=30.0s to the formula. As for the initial and final concentration, we will be using 1/2 of the initial concentration as the final concentration. With this, the ratio of initial and final concentration would be equal to 1/(1/2) or 2. The exact value of the concentration is not important for this problem.

t= (1/k) * ln(2)

30.0 seconds = (1/k) * ln(2)

k = (ln (2)) / 30 seconds

k = ln (2) / 30 or 0.023/sec

To learn more about half-life reaction, please refer to https://brainly.com/question/25750315.

#SPJ4

Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore, 10.16moles of carbon are needed to make 163.1 grams of methane.

The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity or amount of substance. We know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number. The stoichiometry represents the number of moles.

C + 2H\(_2\) → CH\(_4\)

moles of methane= 163.1 grams/ 16.04

                            =10.16moles

the mole ratio between carbon and methane is 1:1

Mole of carbon = 10.16moles

10.16moles of carbon are needed to make 163.1 grams of methane.

Therefore, 10.16moles of carbon are needed to make 163.1 grams of methane.

To know more about mole, here:

https://brainly.com/question/15209553

#SPJ1

The molar mass of calcium hydroxide, Ca(OH)₂ is 74.10 g/mol. The moles of the K₂SO₄ is 0.086 mol . The grams of the glucose is 639 g.

The molar mass of the Calcium oxide , Ca(OH)₂ is :

Ca(OH)₂ = 40 + 2( 15.99 + 1 )

              = 74.10 g/mol

The moles of the  K₂SO₄ in the 15 g of the  K₂SO₄ :

Moles = mass / molar mass

Moles = 15 / 174.25

Moles = 0.086 mol

The moles of the glucose, C₆H₁₂O₆ = 3.55 mol

The mass of the glucose = moles × molar mass

                                         = 3.55 × 180

                                         = 639 g

To learn more about moles here

https://brainly.com/question/26416088

#SPJ4

The formation of molecule can easily be shown by drawing Lewis dot structure. Therefore, SiH\(_3\)⁻ will have  1 lone pair as well as it has a negative formal charge.

Lewis dot structure is a way to represent the valence electron of an element in the form of dot. These are mainly beneficial in understanding the chemical formula of covalent compound.

Si belongs to group 14 of periodic table that is carbon family, so valence electron is 4. One electron is added to this due to one negative charge over the compound. Out of 5 unpaired electron, 3 covalent bond is formed with one electron of hydrogen. Two electron is left over silicon. 1 lone pair as well as it has a negative formal charge.

Therefore, SiH\(_3\)⁻ will have  1 lone pair as well as it has a negative formal charge.

To learn more about Lewis dot structure, here:

https://brainly.com/question/20300458

#SPJ1

Answer:

Chlorine - 17,35.45,18,17,17

Carbon - 6, 12.01,6, 6,6

Lead - 82, 207.2,125,82,82

Iron - 26, 55.847, 30, 26,26

Magnesium - 12, 24.305, 12,12,12

Uranium - 92, 238.09, 146,92,92

Cobalt - 27, 58.933,32, 27,27

Calcium - 20, 40.078, 20,20,20

Platinum - 78, 195.078,117, 78,78

Phosphorus - 15, 30.974, 16, 15,15

Explanation: https://hobart.k12.in.us/ksms/PeriodicTable/abc.htm

The following statement is not true about lighteners- " They are used at relatively high levels'.

Skin lighteners are products that are designed and used to bleach the skin from dark spots and pigments. They are usually used to improve one's physical appearance such as blemishes, dark patches and birthmarks.

They work on the skin by reducing or slowly blocking the production of melanin in the skin. The pigment melanin is responsible for the colour it gives to our skin. It also protects our skin from the harmful effects of the sun.

It usually takes few weeks or even three to four months for lighteners to show effective results on continued usage.

Thus, option (a) is correct.

To know more about lighteners here

https://brainly.in/question/6033829

#SPJ4

The amount of salt in the tank as a function of time is f(t) = 70 + 4t, where f(t) is the amount of salt in the tank after t minutes.

The rate of salt entering the tank is 2 lb/gal x 2 gal/min = <<2*2=4>>4 lb/min, where the concentration of salt is 2 lb/gal. Initially, the tank contains 70 lb of salt and 280 gal of water. When the brine flows into the tank at a constant rate of 2 gal/min, the concentration of salt in the tank remains constant. When the tank is stirred, the salt will be uniformly distributed throughout the mixture. Let’s assume that t is the time in minutes. As a result, the number of minutes that the solution is in the tank will be t. Since the concentration of salt in the tank remains constant, the amount of salt in the tank after t minutes is 70 lb + 4 lb/min × t.

More on  function of time: https://brainly.com/question/30415001

#SPJ11

Boyle's Law: The Relationship Between Pressure and Volume. Because the gas particles are compressed closer together as the pressure on a gas rises, the volume of the gas decreases.

According to this, a gas's volume drops as pressure on it rises at a constant temperature. In other words, while the temperature and the quantity of molecules are both constant, Boyle's law states that volume is inversely proportional to pressure.

Boyle's Law: The Relationship Between Pressure and Volume. The volume of a gas reduces as the pressure on it rises.

To know more about Boyle's Law visit:-

https://brainly.com/question/1437490

#SPJ1

Answer: c) it moves toward a piece of iron

Explanation:

The tensile stress required to fail a tensile coupon that has a 0.5 mm crack on one side is about 14.35 MPa.

Polymethyl methacrylate (PMMA) is a transparent thermoplastic often used as a lightweight or shatter-resistant alternative to glass. It is also used in casting, molding, and extrusion. The tensile strength of PMMA is roughly 65 MPa, but this value changes when a defect is present. The stress required to cause failure can be calculated using the single edge notch plate model to calculate the geometric factor Y.

The fracture toughness of PMMA is 1 MPa m¹/2, and the crack length is 0.5 mm. 12.5 mm is the width of the specimen.For a tensile coupon, the tensile stress required to fail it with a 0.5 mm crack on one side is calculated using the following formula:Stress = (K IC / Y √(πa)) × (b / W)where KIC is the fracture toughness, Y is the geometric factor, a is the crack length, b is the specimen width, and W is the specimen width. For a PMMA coupon with a 0.5 mm crack, a is 0.5/2 = 0.25 mm. Y = 1.12, according to the single edge notch plate model. Substituting the given values, the stress required to fail the coupon is:Stress = (1 MPa m¹/² / 1.12 √(π x 0.25 mm)) × (12.5 mm / 12.5 mm)≈ 14.35 MPa.

To know more about methacrylate visit :

https://brainly.com/question/32492486

#SPJ11

Answer:

I hope this will help its not much

Explanation:

Answer:

6

Explanation:

Answer:

blood- homogeneous

ocean water - heterogeneous

air- homogeneous

blueberry pancakes - homogeneous

milk - homogeneous

steel - homogeneous

Answer:

6.55 g

Explanation:

The atomic mass of Carbon (C) is 12.0107, of Hydrogen (H) is 1.008, of Nitrogen(N) is 14.0067, and of Oxygen(O) is 15.9994

Therefore the molar mass of acetaminophen = 12.0107 + 4 * 1.008 + 14.0067 + 2 * 15.9994 = 151.16

mass of C in 99.0 g of acetaminophen = (99.0 g / 151.16 g/mol) * 1 mol C/ 1mol acetaminophen

mass of C in 99.0 g of acetaminophen = 6.545 g

2.0 moles of He represents 1.2 x 10²⁴ atoms of He.

One mole of any element contains Avogadro's number of atoms, which is approximately 6.022 x 10²³. So, to calculate the number of atoms in 2.0 moles of He, we simply need to multiply Avogadro's number by the number of moles:

The number of atoms in a mole depends on the substance and is determined by Avogadro's number, which is approximately 6.022 x 10²³ atoms per mole.

To learn more about Avogadro's number, here

https://brainly.com/question/11907018
#SPJ4

C = m V . The unit of concentration is typically given as g/mL because the solute mass is frequently given in grammes and the volume is frequently given in milliliters. However, there are a tone of other mass and volume unit combinations that are possible.

Given that a solution consists of both a solute and a solvent, its total volume is equal to the sum of the volumes of both the solute and the solvent it contains.

A solution's concentration is an indicator of how much solute has dissolved in a specific volume of solvent or solution. When there is a significant amount of dissolved solute in a solution, it is said to be concentrated. When a dissolved solute is present in a solution, it is said to be diluted.

To know more about solvent visit:

https://brainly.com/question/1122671

#SPJ4

Answer:

reactants. product

Al(1) Al(1)

Cl(2) Cl(3)

2Al+3Cl2 ---> 2AlCl3

reactants. product

Al(2) Al(2)

Cl(6) Cl(6)

In a balanced chemical equation, the mass and the charge are both equal. Here the balanced equation is 2Al+3Cl₂ → 2AlCl₃. Here the number of Al and Cl on both sides of the equation are equal.

A balanced chemical equation, in which the masses of the reactants and products are equal, contains the same amount of atoms of each element on both sides of the equation. In other words, both sides of the reaction have an equal balance of mass and charge.

Making both sides of the reaction, the reactants and the products, equal in the number of atoms per element is the ultimate goal of balancing chemical equations.

In order to balance the equation, Al+Cl₂ → AlCl₃, multiply 'Al' and 'AlCl₃' by 2 and Cl₂ by 3. So that the number of 'Al' atoms becomes 2 and 'Cl' atoms becomes 6.

To know more about a balanced equation, visit;

https://brainly.com/question/32997814

#SPJ4