plss help . i have no idea

The curved arrow mechanism for the reaction as described is as represented in the attached image.

Nitriles, upon reaction with LiAlH4 can be converted to 1° amines.

Opon occurrence of this reaction, the hydride nucleophile attacks the electrophilic carbon in the nitrile to form an imine anion. Once stabilized by a Lewis acid-base complexation the imine salt can accept a second hydride to form a dianion.

On this note, the nitrile reduction of 4-methyl pentanenitrile and lialh4, followed by the addition of acid to give the major product is as represented in the attached image.

Read more on nitrile reduction by LiAlH4;

https://brainly.com/question/9002449

Answer:

what is your question?

Explanation:

I don't understand

The empitical formula shows the simplest ratio of elements in a compound (not the total number of atoms in the molecule).

So to find the empirical formula we need to calculate how many moles of each atom we have in this sample. Then we will see the ratio of each element.

We are given the mass, so to convert it to moles we use the molar mass. For this we go to the periodic table and see that the values for each element are:

Na (sodium): 22,99 g/mol

H (hydrogen): 1 g/mol

P (phosphorus): 25,81 g/mol

So we calculate the moles of each element as follows:

And as we see, for every 0.833 moles of Na we have the same number of moles of P, so the ratio of these elements in the molecule is 1 to 1.

As for the hydrogen:

So the ratio Na to H is 1 to 2.

Now we can write the empirical formula as follows=

Answer:3,888,000seconds

Explanation:

60secx60minsx24 hoursx45days=3,888,000

Answer: it’s carbon dioxide

Explanation:

This is it because decomposition takes place when carbonic acid breaks down So that’s why I put carbon dioxide

Answer:

carbon dioxide

Explanation:

in our country .we have to study it by heart.

trust me

Answer:

induced-dipole induced dipole forces.

Explanation:

The chemical formula CH₂O contains 3 elements: carbon, hydrogen, and oxygen.

The chemical formula CH₂O represents formaldehyde, which is a simple organic compound.

To determine the number of elements in this formula, we count the different types of atoms that are present. In this case, there are three different types of atoms: carbon (C), hydrogen (H), and oxygen (O).

Therefore, the chemical formula CH₂O contains 3 elements: carbon, hydrogen, and oxygen.

Learn more about number of elements here: https://brainly.com/question/25916838

#SPJ1

Answer:

305.8mL

Explanation: l believe first we get the moles of CaCl2 by dividing the given mass to the molar mass. We than find the volume by manipulating (make v the subject of the formula) the formula c= n÷v.

n(CaCl2)= m/M=(18.67g)÷(110.98g/mol)

=0.16822mol

c=n/v

v= n/c = (0.16822mol)÷ (.55M) = 0.3058L = 305.305.8ml

The amount of concentrated solution needed is (0.286 M)(65 mL) / C M, and the amount of water needed is 65 mL minus the volume of the concentrated solution.

To calculate the molarity of Kool Aid desired, we need to determine the number of moles of Kool Aid powder and sugar in the package. Since the molecular formula for sugar is C12H22O11, we can calculate its molar mass as follows:

Molar mass of C12H22O11 = (12 * 12.01) + (22 * 1.01) + (11 * 16.00)

= 144.12 + 22.22 + 176.00

= 342.34 g/mol

Given that the package contains 4.25 grams of Kool Aid powder, we can calculate the number of moles of Kool Aid powder using its molar mass:

Number of moles of Kool Aid powder = Mass / Molar mass

= 4.25 g / 342.34 g/mol

≈ 0.0124 mol

Similarly, for the sugar, which has a molar mass of 342.34 g/mol, we can calculate the number of moles of sugar using its mass:

Number of moles of sugar = Mass / Molar mass

= 192.00 g / 342.34 g/mol

≈ 0.5612 mol

Now, to calculate the molarity of the desired Kool Aid solution, we need to determine the volume of water. Given that 1.06 quarts is equal to 1 liter, and we have 2.00 quarts of water, we can convert it to liters as follows:

Volume of water = 2.00 quarts * (1.06 liters / 1 quart)

= 2.12 liters

To find the molarity, we use the formula:

Molarity (M) = Number of moles / Volume (in liters)

Molarity of Kool Aid desired = (0.0124 mol + 0.5612 mol) / 2.12 L

≈ 0.286 M

To prepare 65 mL of the desired molarity, we can use dilution calculations. We need to determine the volume of concentrated solution and the volume of water needed.

Let's assume the concentration of the concentrated Kool Aid solution is C M. Using the dilution formula:

(C1)(V1) = (C2)(V2)where C1 is the initial concentration, V1 is the initial volume, C2 is the final concentration, and V2 is the final volume.

Given that C1 = C M and V1 = V mL, and we want to prepare a final volume of 65 mL (V2 = 65 mL) with a final concentration of 0.286 M (C2 = 0.286 M), we can rearrange the formula to solve for the volume of the concentrated solution:

(C M)(V mL) = (0.286 M)(65 mL)

V mL = (0.286 M)(65 mL) / C M

So, the amount of concentrated solution needed is (0.286 M)(65 mL) / C M, and the amount of water needed is 65 mL minus the volume of the concentrated solution.

For more such questions on concentrated visit:

https://brainly.com/question/28564792

#SPJ8

The change in energy of a mixture of gaseous reactants during a chemical reaction indicates that the reaction is exothermic. Additionally, the negative work done on the mixture suggests that the volume of the system decreases during the reaction.

The increase in energy of the gaseous reactants indicates that the reaction releases energy to the surroundings, which is characteristic of an exothermic reaction. In an exothermic reaction, the products have lower energy than the reactants, resulting in a decrease in the total energy of the system. The negative work done on the mixture suggests that the reaction causes a decrease in volume.

This can occur when the total number of moles of gaseous reactants is greater than the total number of moles of gaseous products, leading to a decrease in volume as the reaction proceeds. The negative work done indicates that the system is doing work on the surroundings, resulting in a decrease in volume.

Learn more about gaseous reactants from the given link: https://brainly.com/question/1418011

#SPJ11

Answer:

Speed

Explanation:

Aliyah must have been trying to find her speed.

The speed is a measure of how fast an object or a body is and it is calculated by finding the ratio of distance with time. Mathematically,

  speed = \(\frac{distance}{time}\) with a unit of m/s.

Hence, with the distance measured on the ground and Aliyah trying to find the time it will take her to cover the distance while running, she must have been trying to find how fast she can run, that is, speed.

Answer: b . Covalent compounds can contain a maximum  of 4 different atoms.

Explanation:

The covalent compounds are those compounds that are formed between the non-metals via sharing of electrons. The bonds so formed between these non-metallic atoms are covalent. There can be two or several different kinds of atoms that can form covalent bonds with each other in a single molecule. They use the valence electrons for sharing. The maximum number of valence electrons can be seven.

Answer:

b.Covalent compounds can contain a maximum of 4 different atoms.

Explanation:

Covalent compounds can contain as little as the Covalent compounds can contain a maximum of 4 different atoms.

Therefore , the correct answer is B.

Learn more :

https://brainly.com/question/19382448?referrer=searchResults

Answer: B. Shared electrons

Explanation: Electrons are shared in covalent bonds. The other options are all properties of metallic bonds.

a. The volume ratio of carbon monoxide to carbon dioxide in the balanced equation is 2:2, which can be simplified to 1:1. This means that for every one volume of CO gas that reacts, one volume of CO2 gas is produced.

b. To solve for the volume of N2 gas produced, we need to use the balanced equation to determine the stoichiometry of the reaction. From the equation, we can see that for every two volumes of CO gas that react, one volume of N2 gas is produced.

First, we need to convert the given mass of CO to moles using the molar mass of CO:

42.7 g CO x (1 mol CO/28.01 g CO) = 1.524 mol CO

Next, we can use the stoichiometry of the reaction to calculate the moles of N2 produced:

1.524 mol CO x (1 mol N2/2 mol CO) = 0.762 mol N2

Finally, we can use the ideal gas law to calculate the volume of N2 gas produced at STP (standard temperature and pressure, which is 0°C and 1 atm):

PV = nRT

(1 atm)(V) = (0.762 mol)(0.08206 L atm/mol K)(273 K)

V = (0.762 mol)(0.08206 L atm/mol K)(273 K)/(1 atm) = 17.6 L

Therefore, 42.7 g of CO will produce 17.6 L of N2 gas at STP.

To know more about stoichiometry, click here:-

https://brainly.com/question/29775083

#SPJ11

Answer:

7:4

Explanation:

O2 : NO2

7 : 4

hope this helps :)

HCO3^- is best described as ao bicarbonate in.

The bicarbonate ion, HCO3^-, consists of one hydrogen atom (H+), one carbon atom (C), and three oxygen atoms (O) bonded together. It is a polyatomic ion that plays a crucial role in various biological and chemical processes. Bicarbonate ions are commonly found in the body and are involved in maintaining acid-base balance, particularly in blood and cellular environments.

In terms of acidity, HCO3^- can act as a weak acid. It has the ability to donate a proton (H+) in certain chemical reactions, contributing to the regulation of pH levels in the body. However, it is important to note that HCO3^- is primarily known as a bicarbonate ion and is more commonly involved in its role as a base rather than an acid.

In summary, HCO3^- is best described as a bicarbonate ion, which is involved in maintaining acid-base balance and acts as a weak acid in specific reactions describes HCO3^-. a proton donor a bicarbonate ion a weak acid common in the liver

Learn more about bicarbonate from the given link https://brainly.com/question/32692550

#SPJ11.

HCO3^- is known as the bicarbonate ion. It acts as a weak acid or a proton donor, assisting with pH regulation in the blood by buffering acid wastes from metabolic processes. It is also involved in respiratory regulation of acid-base balance.

HCO3^- is known as bicarbonate ion. It can act as a proton donor, thus making it a weak acid. In the body, bicarbonate ions and carbonic acid exist in a 20:1 ratio, helping to maintain blood pH balance. Bicarbonate ions prevent significant changes in blood pH by capturing free ions. During metabolic processes that release acid wastes such as lactic acid, bicarbonate ions help to buffer the acidity. These ions are even involved in respiratory regulation of acid-base balance, as they are crucial to the balance of acids and bases in the body by regulating the blood levels of carbonic acid. The stronger the acidic substance, the more readily it donates protons (H*). In contrast, bicarbonate is a weak base, meaning that it releases only some hydroxyl ions or absorbs only a few protons. Overall, the bicarbonate ion plays a critical role in various biological reactions and maintaining homeostasis.

https://brainly.com/question/33441745

#SPJ11

Answer:

20ml

Explanation:

using the formula;C1V1=C2V2

2.5×V1=0.2×250

2.5V1= 50

V1=50/2.5

V1=20L

After releasing 2.4 gallons of carbofuran into a lake with a volume of 3.5 × 10⁵ m³, the concentration of carbofuran in the lake is 0.0306286 μg/L, which complies with the safe limit set by the US EPA.

The concentration of carbofuran in μg/L in the lake after releasing 2.4 gallons of carbofuran in a lake with a volume of 3.5 × 10⁵ m³ can be found as follows:

First, let's convert gallons to liters. We have;

1 gallon = 3.78541 liters

So;

2.4 gallons = 2.4 × 3.78541 = 9.084984 liters

The density of carbofuran = 1.18 g/mL = 1180 μg/L (since 1 mL = 1000 μL)

Volume of the lake = 3.5 × 10⁵ m³ = 3.5 × 10¹¹ L (since 1 m³ = 1000 L)

The mass of carbofuran in the lake after releasing 2.4 gallons of it can be calculated as follows:

mass = volume × density

mass = 9.084984 L × 1180 μg/L = 10720.01152 μg

The final concentration of carbofuran in the lake

= (mass of carbofuran in the lake) / (volume of the lake)

= 10720.01152 μg / 3.5 × 10¹¹ L= 0.0306286 μg/L

This concentration does comply with the Maximum Contaminant Level (MCL) of 40 μg/L set by the United States Environmental Protection Agency (US EPA). Therefore, it is safe to use.

To know more about Maximum Contaminant Level (MCL), refer to the link below:

https://brainly.com/question/31557359#

#SPJ11

Answer:

Upward delivery or downward displacement of air

Explanation:

The method of collection of a gas is dependent on it's density.

Gases that are less dense than air are collected by upward delivery or downward displacement of air while gases that are denser than air are collected by downward delivery or upward displacement of air.

Hydrogen is less dense than air hence it is collected by upward delivery or downward displacement of air.

Answer:

The empirical formula for propane is C3H8.

Answer:

Because propane is made up of only hydrogen and carbon _ the chemical formula is C3H8..

#CarryOnLearning

After valves are opened and enough time has passed for net movement of particles between containers to stop, pressure of gas in middle container will be closest to 3 atmospheres as pressure will be halved after opening valves.

Pressure is defined as the force applied on an object perpendicular to it's surface per unit area over which it is distributed.Gauge pressure is a pressure which is related with the ambient pressure.

There are various units by which pressure is expressed most of which are derived units which are obtained from unit of force divided by unit of area . The SI unit of pressure is pascal .

Pressure will be halved after opening valves as it will be bifurcated ,thus, 9/2=4.5 which is closest 3 atmospheres.

Thus,the pressure of gas in the middle container will be closest to 3 atmospheres.

Learn more about pressure,here:

https://brainly.com/question/14760196

#SPJ1

To determine the value of ∆Hrxn for the reaction, we can use the equation:

∆Hrxn = q / n

where q is the heat of the reaction, n is the number of moles of reactants, and ∆Hrxn is the change in enthalpy of the reaction.

We can use the equation for calculating heat:

q = mc∆T

where q is the heat, m is the mass of the solution, c is the specific heat of the substance, and ∆T is the change in temperature.

The mass of the solution is equal to the volume of the solution times the density:

m = V * d

Plugging this equation into the equation for calculating heat, we get:

q = (V * d) * c * ∆T

We can use the values given in the problem to solve for q:

q = (0.200 L * 1.00 g/mL) * (4.18 J/g°C) * (23.48°C - 22.15°C)

q = 4.32 J

To determine the value of ∆Hrxn, we need to know the number of moles of reactants. The concentration of the HCl solution is 0.2 M, so the number of moles of HCl is:

n = (0.200 L) * (0.200 mol/L) = 0.040 mol

Plugging this value into the equation for ∆Hrxn, we get:

∆Hrxn = q / n = (4.32 J) / (0.040 mol) = 108 J/mol

Therefore,  ∆Hrxn=108 J/mol

Learn more about Thermodynamics here: https://brainly.com/question/1368306

#SPJ4

Answer:

c

Explanation:

The commercial technology commonly uses plasma is a television. The correct option is c.

Commercial technology is any technology that is employed in the business world, including electric power, radio, television, phones, and other similar devices. These items are employed commercially in a variety of fields. An electrical gadget called television is used to watch entertainment.

Plasma is a substance found in televisions; these gas-filled pockets receive electricity to transform into plasma screens. The UV rays that these plasmas then emit create a picture as they pass through the phosphorus cells.

Thus, the correct option is c. a television, regarding a commercial technology that commonly uses plasmas.

Learn more about commercial technology, here:

https://brainly.com/question/17009267

#SPJ5

The number of grams of potassium sulfate dissolved in 700 mL of a 0.5M is 60.991g.

The mass of a substance can be calculated by multiplying the number of moles in the substance by its molar mass as follows:

mass = no of moles × molar mass

However, the number of moles can be calculated from the molarity as follows:

0.5M = moles ÷ 0.7L

moles of pottasium sulfate = 0.35 moles

Molar mass of pottasium sulfate = 174.259 g/mol

Mass = 174.26 × 0.35 = 60.991g

Learn more about mass at: https://brainly.com/question/13320535

#SPJ1

Among hydrogen bonds, dipole forces, dispersion forces, and ionic bonds, the weakest bond is: A. hydrogen bonds.

A chemical bond is defined as the forces of attraction that are existing between ions, crystals, atoms or molecules and they are mainly responsible for the formation of chemical compounds.

Hence, a chemical bond refers to a force holding atoms together and binding ions, crystals, or molecules together, in order to form a chemical compound.

Typically, there are three main types of chemical bonds and these are:

Hydrogen bond can be defined as a weak chemical bond existing between a partially positively charged hydrogen atom and an electronegative chemical atom.

A hydrogen bond has the strongest intermolecular force of attractions, but it is weaker than an ionic bond or covalent bond.

Read more: https://brainly.com/question/24212500

Semiconductors are more conductive than a nonmetal and less conductive than a metal.

These are substances which have a higher conductivity than insulators and examples include silicon.

They are mainly crystalline solids which have less conductivity than metals thereby making it the most appropriate choice.

Read more about Semiconductor here https://brainly.com/question/10618523

#SPJ1

There are plenty of elements in the periodic table, and also plenty of ways of classifying these elements, one way of doing that is by splitting into metals, nonmetals and metalloids. Metals are usually in the middle and the left of the periodic table, will have characteristics like good conductibility, malleability and many more. Chromium has an atomic number of 24 and it is classified as a metal. Therefore letter C