For a radical addition reaction involving HBr and propene, sort each reaction step into the following categories: CH3CH=CH2 + HBr CH3CH2CH2Br

The number of moles occupied by a gas at 347.8 mL is 6.21 × 10-³moles.

The number of moles occupied by a gas can be calculated using the ideal gas equation formula as follows:

PV = nRT

Where;

According to this question, the following parameters are given:

0.4369 × 0.3478 = n × 0.0821 × 298

0.1519 = 24.47n

n = 6.21 × 10-³moles

Therefore, 6.21 × 10-³moles is the number of moles of the gas.

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Answer:

there is no picture. please add it so i can see :)

Explanation:

The types of business activities or operation are:

The  main types of business activities can be seen as the  operating, investing,  as well as the financing.

Investing business activities  can be described as one that is  capitalized over more than one year and it involves how the purchase of long-term assets is made and it can be recorded as a use of cash in the section.

Operating activities can be described a the daily activities of a company which could encompass the process of producing and selling its product, generating revenues, a which can aswell involves the maintenance activities.

Financing activities can be described as the  transactions between a business as well as the lenders and owners to acquire or return resources it can be seen as the activities to fund the company, repay lenders.

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The value of the reaction quotient, Q, for the galvanic cell  for the galvanic cell expressed using shorthand notation is  64×10 ^−3

Zn(s)+2Ag (1.25M)Zn2+ (0.01M)+2Ag in a cell (s).

Q= [Zn ^2+ ]/[Ag ^⊕ ]

Q= 0.01 / (1.25)^2

Q= 64×10 ^−3

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50.5 * 104 grams of the liquid sample are still present in the container at a temperature of 260 K, per the provided data.

The equilibrium pressure between molecules moving from a liquid into a gaseous phase & molecules moving from a gaseous phase into a liquid phase in a closed container is known as the vapour pressure of a liquid.

Pentane's liquid vapor pressure equals 100 mmHg or 13.33 KPa.

T = 260 K, the temperature

Container volume = 370 mL = 0.00037 m3mol

moles of liquid pentane = n

universal gas constant = R = 8.314 J/(mol·K)

Thus From the ideal gas equation PV = nRT →

Thus plugging in the values in the above equation we have

n = = 2.16×10⁻³ moles = 2.28*10³ moles

Hence the number of moles in 0.206 g sample of liquid pentane C₅H₁₂ with molar mass = 72.15 g/mol = 0.206/72.15 = 2.86*10⁻³ moles

Hence the number of moles present in the sample placed in the closed evacuated container = 2.86*10⁻³ moles

However number of moles to completely evaporate at 100 mmHg and 260 K is 2.16×10⁻³ moles hence, 2.86×10⁻³ moles - 2.16×10⁻³ moles, or 0.7 ×10⁻⁴ moles will be left in the container

converting the value in moles to mass we have number of moles, n = mass/(molar mass)

Therefore the mass = number of moles × molar mass = 0.7×10⁻⁴ * 72.15 = 50.5 * 10⁻∧4 grams left in the container

The liquid pentane C5H12 vapor pressure, or 100 mm Hg, will be the pressure inside the container at equilibrium.

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A. guaranteed salary.

Supervised Agricultural Experience (SAE)

A supervised agricultural experience (SAE) is an organized opportunity for experiential and work-based learning outside of the classroom in a setting other than a school setting that takes place outside of regular school hours in order to enhance a student's industry.

A few examples are cultivating and selling livestock or crops, making and selling farm machinery, purchasing and reselling feed, seeds, and fertilizer, running a pet-care business, or programming and installing computer hardware in tractors.

Programs for supervised agricultural experience fall into one of four categories: exploratory, entrepreneurial, placement, or research/experimentation. The SAE for each student is determined by their interests and the opportunities that are accessible.

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Answer:

d. Valence electrons are found in the nucleus.

Explanation:

Valence electrons are the electrons in the outermost shell, or energy level, of an atom.

The other 3 statements are correct.

Radioactive hydrogen during photosynthesis It was recycled into glucose .The correct "option is C"

Photosynthesis is the process by which green plants and certain other organisms transform light energy into chemical energy. During photosynthesis in green plants light energy is captured and used to convert water, carbon dioxide, and minerals into oxygen and energy-rich organic compounds.

Therefore during this process hydrogen is combined with carbon dioxide to make glucose.

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Answer:

Here you go

Explanation:

1. No, her conclusion is incorrect. pH is a logarithmic scale, which means that a difference of 1 pH unit corresponds to a 10-fold difference in acidity. Therefore, a difference of 3 pH units corresponds to a 1000-fold difference in acidity, not 10,000. So soda is generally 1000 times more acidic than water.

2.The pressure of the balloon would need to decrease in order for the volume to increase to three times the size. This is due to the fact that air inside the balloon is a gas, and its volume is inversely proportional to the pressure of the gas. Therefore, a decrease in pressure would result in an increase in volume.

Taking into account the definition of molarity and molar mass, the mass of fructose contained in 125ml of a 0.500M fructose solution is 11.43 grams.

Molarity is a measure of the concentration, which indicates the number of moles of solute that are dissolved in a given volume.

The molarity of a solution is calculated by dividing the moles of solute by the volume of the solution:

molarity= number of moles of solute÷ volume

Molarity is expressed in units moles/L.

The molar mass of substance is defined as its mass per unit quantity of substance. In other words, molar mass is the amount of mass that a substance contains in one mole.

In this case, you have:

Replacing in the definition of molarity:

0.500 M= number of moles of fructose÷ 0.125 L

Solving:

0.500 M× 0.125 L= number of moles of fructose

0.0635 moles= number of moles of fructose

Being the molar mass of fructose 180 g/mole, the mass of the compound can be calculated as:

mass= molar mass× number of moles of fructose

mass= 180 g/mole× 0.0635 moles

mass= 11.43 grams

Finally, the mass of fructose is 11.43 grams.

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Answer:

C.) Calcium

Explanation:

Because none of the answer choices are nonmetals, we can safely assume this compound is not covalent. This means that the atoms involved in this molecule were ions before they bonded.

Chlorine, located in the 17th column, typically ionizes to become the anion Cl⁻. This anion has a negative charge of -1. The subscript indicates that there are 2 chorine ions in the compound, increasing the overall negative charge to -2 (2 x -1 = -2).

Since ionic compounds are neutral, the correct answer choice is the atom that ionizes to form a cation that can make the overall charge of the compound 0. As such, the cation needs to have a positive charge of +2 (+2 + (-2) = 0).

Aluminum = Al³⁺

Sodium = Na⁺

Calcium = Ca²⁺

Argon = does not typically ionize

Therefore, calcium must be the unknown element (X), making the compound CaCl₂.

A proposed method of producing methanol 5.58J heat must be added or removed from the whole system.

What is methanol  ?

Having the chemical formula CH3OH, methanol is a liquid (often abbreviated MeOH). It has no color and is toxic, combustible, volatile, and unstable. The main building blocks for the synthesis of methanol are carbon monoxide and hydrogen, and it is produced by destructively distilling wood.

What is heat  ?

Heat is the result of the movement of kinetic energy from one substance or item to another, or from an energy source to a substance or object. Radiation, conduction, and convection are three different ways that this energy might be transferred.

Therefore, a proposed method of producing methanol 5.58J heat must be added or removed from the whole system.

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The force of repulsion between the positive charges has a magnitude of 230 N. Option B

We know that the Coulomb's law deals with the way that two charges are able to interact. The interaction between the two charges could be such that the charges are attracted to each other or the charges are repelled from each other.

The forces of attraction and repulsion are the bases of the Coulomb's law. According to the Coulomb's law, the forces of attraction or repulsion between two charges would depend on the product of the magnitudes of the charges and inversely proportional to the distance that separates the charges.

Hence;

F = K[tex]q_{1}[/tex][tex]q_{2}[/tex]/r^2

F = Coulomb's force

[tex]q_{1}[/tex]and [tex]q_{2}[/tex] = magnitude of the charges

r = distance of separation

Then;

F =  8.99 × 10^9 * (1.6 × 10^−19)^2/(1 * 10^-16)^2

F = 2.3 * 10^3 N

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There are so many types of chemical reaction reaction like combination reaction, double displacement reaction, nucleophilic substitution reaction etc. Therefore, the reaction is nucleophilic substitution reaction. The product formed is 1-bromo-2-methyl-2-phenylethane.

One nucleophile substitutes another in a family of organic reactions known as nucleophilic substitution reactions.

The characteristics of SN1 mechanism:

SN1 stands for nucleophilic substitution reaction.

Leaving group, a nucleophile, electrophile and a solvent are present

Because a link is being severed, the first step is the most laborious.

In the given reaction, firstly H⁺ will attack OH to make good leaving group, then generation of carbocation will take place. Thereafter Br⁻ will attack the carbocation forming C-Br bond. The product formed is 1-bromo-2-methyl-2-phenylethane.

Therefore, the reaction is nucleophilic substitution reaction. The product formed is 1-bromo-2-methyl-2-phenylethane.

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The vapor leaving the condenser cell will be recirculated and mixed with the original inlet stream before entering the reaction cell.

Thermal pollution is a term use to describe the final result caused from the  water used as a coolant by power plants and/or industrial companies. It changes the water temperature and its quality. The substances after the reaction will pass through the condenser.

It is usually caused from humans or companies especially manufacturing companies - They use it for their personal needs. The end product of the water after being discarded is Thermal Pollution.

Therefore, The vapor leaving the condenser cell will be recirculated and mixed with the original inlet stream before entering the reaction cell.

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Answer:5.63 atm

Explanation: Dalton's Law states that total pressure of a mixture of gasses is equal to the sum of partial pressure of each gas.

[tex]P_{tot} = P_{1} +P_{2}+ P_{3}...[/tex]

We are given pressure O2 and pressure Cl2.

Step 1: First, convert 3040mmHg to atm by dividing by 760.

[tex]\frac{3040mmHg}{760atm} = 4 atm[/tex]

Step 2: Plug your numbers into the equation

[tex]P_{tot} = P_{O2} +P_{Cl2}[/tex]

[tex]P_{tot} = 4atm + 1.63 atm = 5.63 atm[/tex]

In the given question, the moles of hydrogen that can be obtained from the reaction is 4.75 moles.

The reaction of zinc with hydrochloric acid can be written as:

                              Zn + 2HCl ⇒ ZnCl₂  + H₂

This reaction is a displacement reaction, in which zinc displaces hydrogen from hydrochloric acid. Hydrogen is released from HCl and hydrogen gas appears at the end of the reaction.

It can be seen that 1 mole of zinc combines with 2 moles of HCl to produce 1 mole of hydrogen gas. If 4.75 moles of zinc is combined with an excess amount of HCl, then it will produce 4.75 moles of H₂.

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Answer:

64.38g

Explanation:

Mass no. of Na is 23 and mass no. of Cl atom is 35. Total is 58. 1 mole of NaCl is 58g. 1.11 moles of NaCl is 1.11x58=64.38g.

−C≡N is the classic low spin ligand.

What is Ligand?

The Latin root of the term "ligand" means "to tie or bind." Anions, cations, and neutral substances can all function as ligands. Lewis bases are ligands that provide electron pairs, whereas Lewis acids are central metal atoms (electron pair acceptor). Covalent and ionic bonds are two different types of bonding that can exist between a metal and its ligand.

On rare occasions, ligands can be electron-pair acceptors and cations (NO+, N2H5+). Examples of neutral ligands include NH3, H2O, NO, and CO, whereas anionic ligands include F-, Cl-, Br-, I-, S2-, CN-, NCS-, and OH-.

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The reaction between solid copper and nitric acid to form copper ii ion nitrogen monoxide gas and water is represented below- - Cu(s) + 4 HNO3(aq) → Cu(NO3)2(s) + 2 NO2(g) + 2 H2O(l).

What is reaction?

One or more chemicals, sometimes referred to as reactants, are changed into one or more new substances, referred to as products, during a chemical reaction.

What is copper?

Throughout the body, copper is a mineral. It maintains the health of your nerve cells and immune system and aids in the production of red blood cells in your body. Additionally, it aids in the formation of collagen, which is essential for the formation of bones and connective tissue. By lowering free radicals that can harm DNA and cells, copper may also have antioxidant properties.

With dilute nitric acid:

3 Cu(s) + 8 HNO3(aq) → 3 Cu(NO3)2(s) + 2 NO(g) + 4 H2O(l)

With conc. nitric acid:

Cu(s) + 4 HNO3(aq) → Cu(NO3)2(s) + 2 NO2(g) + 2 H2O(l)

Therefore, reaction between solid copper and nitric acid to form copper ii ion nitrogen monoxide gas and water is represented below- Cu(s) + 4 HNO3(aq) → Cu(NO3)2(s) + 2 NO2(g) + 2 H2O(l).

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The enthalpy of the reaction is then obtained as 71.5 kJ/mol.

We know that the enthalpy of the reaction has to do with the amount of heat that is absorbed or lost in the reaction. In this case, we can see that our task is to obtain the enthalpy of the dissolution reaction.

Number of moles of the calcium chloride =  37.73 g/110.98 g/mol

= 0.34 moles

Mass of the water = 240.00 g

Heat gained by the water = mcdT

m = mass of the water

c = heat capacity of  the water

dT = Temperature change

Then;

H = 240.00 *  4.18 * 24.25

H = 24.3 kJ

Enthalpy of the reaction = -( 24.3 kJ)/0.34 moles

= 71.5 kJ/mol

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Answer:

Water, H20 is a molecule made of oxygen and hydrogen. The bonds that hold water molecules together are due to shared electrons and known as Covalent bonds. In contrast, the bonds that hold NaCl molecule together are Ionic bonds, arising from charge difference between the atoms

Answer:Many nocturnal animals have a mirror-like layer, called the tapetum, behind the retina, which helps them make the most of small amounts of light.

Explanation:

Answer:

proton

Explanation:

Atoms are composed of a nucleus, containing protons and neutrons, surrounded by a cloud of electrons. The number of protons in the nucleus determines the identity of the atom

A type of fossil fuel,known as Tar stands.

A fossil fuel is a hydrocarbon-containing material formed naturally in to  the Earth's crust from to the  remains of dead plants and animals and birds that is the  extracted and burned as thr  a fuel. The main fossil  fuels are mainly coal, oil, and natural gas.

Tar sands are a combination of clay, sand, water and bitumen, which is a heavy hydrocarbon. Like the  kerogen in oil shale, tar sands' bitumen can be upgraded to synthetic crude oil.

So answer is tar sands.

These include tar sands – deposits of moist sand and it is  clay with 1-2 percent  bitumen (thick and heavy are  petroleum rich in the  carbon and poor in the  hydrogen). These are the  removed by strip mining in the  (see section below on coal)

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The venom of a snake, the horns of cattle, the wax-producing glands of bees, and the bright plumage of birds all are physical adaptations that increase an organism's chances of physically defending itself.

Physical adaptations do develop over many generations. The shape of a bird's beak, the thickness or thinness of the fur, and the shape of the nose or ears are examples of physical adaptations.

Adaptation can be described as a characteristic that provides defense for an animal to survive in its habitat. All animals should be able to get food and water, protect themselves from harm, and climate, and reproduce young species.

Horns and antlers can be used to protect themselves, fight for territory, or to attract a mate. The leaves are coated in the wax which reduces water loss and stops the plant from drying out. Some butterflies and birds have bright, vivid colors that provide them stand out from their surroundings and serve as a warning to predators.

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