Predict the major product formed by 1,4-addition of HCI to 1,3-cyclohexadiene.

Answer:

a mixture that is made when one substance dissolves and mixes with another substance

Baking soda and ice are pure substances, while blueberry muffins and zinc trimix in a scuba tank are mixtures. Vegetable soup, tea with ice and lemon slices, and fruit are heterogeneous mixtures, while seawater and tea are homogeneous mixtures.

a. Baking soda (NaHCO3) - Pure substance (compound). It is a specific chemical compound with a fixed composition, consisting of sodium (Na), hydrogen (H), carbon (C), and oxygen (O) atoms combined in a definite ratio.

b. Blueberry muffin - Mixture. It is a combination of various ingredients, such as flour, sugar, blueberries, butter, eggs, etc. Muffins are not chemically bonded, so it is considered a mixture.

c. Ice (H2O) - Pure substance. It is a specific form of water in the solid state, consisting of hydrogen and oxygen atoms in a fixed ratio.

d. Zinc trimix in a scuba tank - Mixture. It is a combination of three gases: oxygen, nitrogen, and helium. These gases are physically mixed together in the scuba tank and can be separated.

a. Vegetable soup - Heterogeneous mixture. It contains various visible components like vegetables, spices, and broth, which are not uniformly distributed throughout the soup.

b. Seawater - Homogeneous mixture. Although it contains various dissolved substances, such as salts, minerals, and microorganisms, they are uniformly distributed and cannot be visually distinguished.

c. Tea - Homogeneous mixture. It consists of water and dissolved compounds from tea leaves, such as flavors, aromas, and caffeine. These components are uniformly mixed and not easily distinguishable.

d. Tea with ice and lemon slices - Heterogeneous mixture. It contains visible components like tea, ice, and lemon slices that are not evenly distributed throughout the mixture.

e. Fruit - Heterogeneous mixture. Fruits consist of various tissues, such as pulp, seeds, and skin, which are not uniformly distributed and can be visually distinguished within the fruit.

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Answer:

The increase in the concentration of reactants increases the frequency of effective collisions.

Explanation:

The concentration of reactants determines the rate of reaction by providing the number of reactants available to yield an effective collision. There is a direct relationship between the concentration of reactants and rate of reaction.

Considering the definition of molar mass and STP conditions, 7.8 grams of benzene will ocupy at STP 2.24 L.

Molar mass is the amount of mass that a substance contains in one mole.

In the periodic table, you can find the molar mass of the elements, also called atomic mass or atomic weight.

To calculate the molecular mass of a compound, also called mass or molecular weight, the molar mass of the elements of the compound must be added multiplied by the times they appear.

The STP conditions refer to the standard temperature and pressure. Pressure values at 1 atmosphere and temperature at 0 ° C are used and are reference values for gases. And in these conditions 1 mole of any gas occupies an approximate volume of 22.4 liters.

Benzene is an aromatic hydrocarbon with the molecular formula C₆H₆. So, being the molar mass of the elements C 12 g/mole and H 1 g/mole, the molecular mass can be calculated as:

C₆H₆: 6×12 g/mole + 6×1 g/mole

C₆H₆: 78 g/mole

Then, you can apply the following rule of three: if 78 grams of the compound are contained in 1 mole, 7.8 grams are contained in how many moles?

\(number of moles=\frac{7.8 gramsx1 mole}{78 grams}\)

number of moles= 0.1 moles

Now, you can apply the following rule of three, taking into account the definition of STP conditions: if by definition of STP conditions 1 mole of O₂ occupies a volume of 22.4 liters, 0.1 moles occupies how much volume?

\(volume=\frac{0.1 molex22.4 L}{1 mole}\)

volume= 2.24 L

Finally, 7.8 grams of benzene will ocupy at STP 2.24 L.

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The freezing point depression of a solution is proportional to the molality (m) of the solution, where molality is defined as the number of moles of solute per kilogram of solvent.

The more solute dissolved in a solution, the lower its freezing point will be. Based on this information, we can match the aqueous solutions with their appropriate letter from the column on the right:

0.10 m CuCl2 → C. Third lowest freezing point

0.13 m Cr(CH3COO)2 → B. Second lowest freezing point

0.17 m CuSO4 → A. Lowest freezing point

0.37 m Glucose (nonelectrolyte) → D. Highest freezing point

Explanation:

CuCl2 and CuSO4 are both strong electrolytes that dissociate completely in solution to form two ions per formula unit.

Therefore, they will have a greater effect on the freezing point depression compared to Cr(CH3COO)2, which only dissociates partially in solution.

Glucose is a nonelectrolyte and does not dissociate in solution, so it will have no effect on the freezing point depression. Therefore, it will have the highest freezing point among the given solutions.

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Answer:The carbon footprint of pork varies depending on the location and the production methods used. On average, the carbon footprint of pork production is estimated to be around 3.8 kg CO2e per kg of pork.

So for 23 kg of pork, the total carbon footprint would be:

3.8 kg CO2e/kg * 23 kg = 87.4 kg CO2e

Therefore, approximately 87.4 kg of CO2 equivalents are emitted in the production and post-farmgate processing of 23 kg of pork.

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Taking into account the definition of calorimetry, the correct answer is the third option:  The heat exchanged is 10,450 J.

Calorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system.

Sensible heat is the amount of heat that a body absorbs or releases without any changes in its physical state (phase change).

The amount of heat (Q) necessary to vary the temperature of a mass (m) of a substance is proportional to the change in its temperature (∆T) and to that mass. So, the equation that allows calculating heat exchanges is:

Q = c× m× ΔT

where Q is the heat exchanged by a body of mass m, made up of a specific heat substance c and where ΔT is the temperature variation.

In this case, you know:

Replacing in the expresion for calorimetry:

Q = 4.18\(\frac{J}{gC}\)× 100 g× 25 C

Solving:

Q= 10,450 J

Finally, the correct answer is the third option:  The heat exchanged is 10,450 J.

Learn more:

Answer: combustion and girl

Explanation: C3H6O + 4 O2 → 3 CO2 + 3 H2O COMBUSTION

We have a total of 9.27 moles of the molecule that weights 134.1 g/mol.

The molecular mass of the molecule is 134.7 g/mol.

The amount of the molecule that we have is 1.25kg.

We know,

1 kilogram = 1000 grams.

1.25 kilograms = 1250 grams.

The mass of the amount of molecule we have is 1250 grams.

The moles of a molecule are given by,

Moles = Mass that we have/molecular mass

Putting the values accordingly,

Moles = 1250/134.7

Moles = 9.27 moles.

So, we have 9.27 moles of that molecule whose molecular mass is 134.1 g/mol.

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Answer:

2,2- dichloro-heptane

Explanation:

The IUPAC name of the compound is 2,2-dichloro-heptane

B. Metal is a better conductor then cramic

nice to help you-!

Answer:

The dyes which cover more surface area will travel more slowly. Similarly if two substances which have same speeds, they are going to travel together and they won't separate as chromatography separates substances having different rates or speeds for travelling

Chromatography cannot separate components with the same speed due to their identical affinities.

In chromatography, separation relies on differences in affinity between the components and the stationary phase. When components have the same speed, it indicates that their interactions with the stationary phase are nearly identical.

As a result, the forces that cause one component to move ahead of the other are not pronounced enough to achieve effective separation. Without distinct interactions, chromatography struggles to discriminate between components leading to poor separation outcomes.

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1284.689 grams of sodium nitrate will be produced from 15.1 moles of silver nitrate.

To determine how many grams of sodium nitrate will be produced from 15.1 moles of silver nitrate, we need to perform a balanced equation and stoichiometry calculation.

The balanced equation for the reaction between silver nitrate and sodium chloride to form silver chloride and sodium nitrate is:

AgNO3 (aq) + NaCl (s) → AgCl (s) + NaNO3 (aq)

We know that 15.1 moles of silver nitrate will react with the stoichiometric amount of sodium chloride, which is 1 mole of sodium chloride for every 1 mole of silver nitrate.

So, we can calculate the moles of sodium nitrate that will be produced by multiplying the moles of silver nitrate by the coefficient of sodium nitrate in the balanced equation:

15.1 moles AgNO3 * 1 mole NaNO3 / 1 mole AgNO3 = 15.1 moles NaNO3

To convert the moles of sodium nitrate to grams, we can use the molar mass of sodium nitrate, which is 84.99 g/mol.

15.1 moles NaNO3 * 84.99 g/mol = 1284.689 g

So, 1284.689 grams of sodium nitrate will be produced from 15.1 moles of silver nitrate.

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A gas that initially had a temperature of 422 K and was reduced to only 269 mL would now have an initial temperature of 563.19 K.

Volume at start: 359 mL

Volume completed: 269 mL

422 K is the final temperature.

Temperature at the start =?

Charle's Law can be used to resolve the issue. Charles Law states that with constant pressure and molecular number, the volume of a given amount of a gas is directly proportional to its temperature.

V₁/T₁ = V₂/T₂

Initial volume: V1

Initial temperature is T1.

Final volume is V2.

T2 = Actual temperature.

We will now enter the values into the formula.

V₁/T₁ = V₂/T₂

T₁ = V₁T₂ / V₂

T1 = 359 ml 269 ml / 422 K

T1=151498 ml.K/ 269 ml

T₁ = 563.19 K

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Answer:

Tribhuvan University is a university in Tribhuvan, Nepal. Tribhuvan University (TU) is a pioneering higher education institution in Nepal, having been founded in 1959. ......

Pokhara University... Kathmandu University...

Purbanchal University is located in Purbanchal, India.

Lumbini Bauddha University (LBU) is a university in Lumbini, Nepal...

Nepal Sanskrit University is a university dedicated to the study of Sanskrit in Nepal.

Midwestern University is a public university in the Midwest...

Nepal Open University is a public university in Nepal.

Explanation:

Answer:

Explanation:

If you look at an atom as a whole, it is electrically neutral and possesses no overall charge.  The nucleus consists of Protons and neutrons, Protons have a positive charge and neutrons have no charge on them.

Hence, the nucleus of an atom is positively charged and is generally surrounded by one or more electrons.

The electrons on the other hand have a negative charge on them.  

The sign convention for proton (+1), neutron(0) and electron(-1). The nucleus is very heavy but is very small compared to the overall size of an atom.            

An atom consists of a positively charged nucleus, surrounded by one or more negatively charged particles called electrons. The positive charges equal the negative charges, so the atom has no overall charge; it is electrically neutral. I hope this helped.

The product formed from the reaction of p-methylphenol with benzenediazonium chloride is p-methylazobenzene. In this reaction, p-methylphenol acts as the reactant, while benzenediazonium chloride serves as the coupling agent.

When p-methylphenol is reacted with benzenediazonium chloride, the product that is formed is p-methylphenol diazonium chloride. This reaction involves the replacement of the diazonium group (N2+) of benzenediazonium chloride with the hydroxyl group (-OH) of p-methylphenol.

The resulting product, p-methylphenol diazonium chloride, is an organic compound that is commonly used in the synthesis of other products.

This reaction is also known as diazotization and is widely used in the production of azo dyes and other organic products.

Overall, the reaction of p-methylphenol with benzenediazonium chloride results in the formation of p-methylphenol diazonium chloride as the final product.

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Answer:

E = 15×10⁻²⁹ J

Explanation:

Given data:

Frequency of photon = 2.2× 10⁷ Hz

Energy of photon = ?

Solution:

Formula:

E = h.f

h = 6.63×10⁻³⁴ Js

by putting values,

E = 6.63×10⁻³⁴ Js × 2.2× 10⁷ s⁻¹

E = 14.586 ×10⁻²⁹ J

E = 15×10⁻²⁹ J

The energy of photon is 15×10⁻²⁹ J.

The movement of nutrients, oxygen (O2), and the removal of metabolic wastes occur through the circulatory system, which consists of the heart, blood vessels, and blood. This system ensures the transportation of vital substances to cells and the removal of waste products from tissues.

The circulatory system plays a crucial role in the movement of nutrients, oxygen, and the elimination of metabolic wastes in the body. It consists of the heart, blood vessels, and blood. The heart acts as a pump that continuously propels the blood throughout the body. Arteries carry oxygenated blood away from the heart to the tissues, while veins transport deoxygenated blood back to the heart.

Within the blood, nutrients such as glucose, amino acids, vitamins, and minerals are dissolved and transported to various tissues and organs. Oxygen, essential for cellular respiration, binds to red blood cells in the lungs and is transported to the cells where it is needed. At the same time, metabolic wastes like carbon dioxide, produced as a result of cellular metabolism, are picked up from the tissues and carried back to the lungs for exhalation.

The capillaries, tiny blood vessels, are responsible for the exchange of substances between the blood and the surrounding tissues. Through their thin walls, nutrients and oxygen diffuse out of the capillaries into the cells, while waste products like carbon dioxide and other metabolic byproducts move from the cells into the capillaries for removal.

In summary, the circulatory system, comprised of the heart, blood vessels, and blood, facilitates the movement of nutrients, oxygen, and the elimination of metabolic wastes. This system ensures that vital substances reach the cells that need them while efficiently removing waste products from tissues, contributing to the overall functioning and homeostasis of the body.

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The particles must collide with enough energy to meet the activation energy of the reaction and be in the correct orientation upon impact to result in a reaction. (options 2 and 3)

For a chemical reaction to occur, the reactant molecules must collide with each other with sufficient energy to overcome the activation energy barrier of the reaction. This energy is required to break the existing bonds between atoms in the reactants, allowing new bonds to form and resulting in the formation of products.

Additionally, the reactant molecules must collide in a specific orientation or geometry that allows their atoms to align in a way that facilitates the breaking and forming of bonds. If the collision does not occur with sufficient energy or in the correct orientation, the reactant molecules will simply rebound without reacting. The charges and energies of the colliding particles do not necessarily have to be equal for a reaction to occur.

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Complete Question:

what factors determine whether a collision between two reactant molecules will result in a reaction?

The value of standard free energy change (∆G°) for the oxidation of iron by H (at 25 °c) is found to be 20,925 J/mol.

The standard potential for the reduction of Fe³⁺ is -0.036 V. To calculate the standard free energy change (∆G°) for the oxidation of iron by H⁺, we can use the following equation,

∆G° = -nFE°, number of moles of electrons transferred is n, Faraday constant (96,485 C/mol) is F, standard cell potential is E°.

The balanced equation for the oxidation of iron by H⁺ is,

2Fe(s) + 6H⁺(aq) → 2Fe³⁺(aq) + 3H₂(g)

The oxidation of iron by H⁺ involves the transfer of 6 electrons, so n = 6

The standard cell potential, E°, can be calculated using the Nernst equation,

E° = E°(Fe³⁺/Fe²⁺) - (RT/nF) × ln(Q), the gas constant (8.314 J/(mol·K)) is R, temperature in Kelvin (298 K) is T, number of electrons transferred (6) is n, F is the Faraday constant (96,485 C/mol), and Q is the reaction quotient.

At standard conditions, the reaction quotient Q is equal to 1, since the concentrations of all the species in the reaction are 1 M. Therefore, ln(Q) = ln(1)

= 0.

Plugging in the values, we get,

E° = -0.036 V - (8.314 J/(mol·K) × 298 K/6 × 96,485 C/mol) × 0

E° = -0.036 V

Now we can calculate ∆G°,

∆G° = -nFE°

∆G° = -(6 mol e⁻) × (96,485 C/mol) × (-0.036 V)

∆G° = 20,925 J/mol

Therefore, the standard free energy change for the oxidation of iron by H⁺ is 20,925 J/mol at 25 °C.

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Complete question - Calculate ∆G° for the oxidation of Iron by H (at 25 °C). Reduction of Fe³⁺ has a potential of -0.036V. 2Fe(s) + 6H(aq) → 2Fe(aq) + 3H₂(g)

Answer:

gas ; methane , ethane  

liquid ; octane , hexane

Explanation;

i cant find solid dear

pls help anyone with an example of a  solid alkanes

In the given case, we can conclude that The speed of 763.04 miles per hour is equivalent to 342.26 m/s.

The speed of 763.04 miles per hour can be converted to meters per second (m/s) using the conversion factor that 1 mile is equal to 1609.344 meters.

"Speed" refers to the rate at which an object changes its position or location in a given amount of time. It's a fundamental concept in physics and is used to describe how fast something is moving. Speed is a scalar quantity, which means it has magnitude but not direction.

It's typically measured in units like meters per second (m/s), kilometers per hour (km/h), miles per hour (mph), or other appropriate units depending on the context.

So, to convert miles per hour to meters per second, we need to divide the speed in miles per hour by the conversion factor.

So, 763.04 miles per hour is equal to 342.26 m/s (rounded to two decimal places).

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The number of moles of a substance is calculated from the given weight of the substance and its molecular mass by using the formula:

No. of moles = \(\frac{Mass of substance in grams}{Molecular mass of substance}\)

Molecular mass of Na₂SO₄.10H₂O is calculated to be

(23×2)+32+(16×4)+(10×18) = 46+32+64+180 = 322 g/mol

Thus, for 483g of Na₂SO₄.10H₂O, the number of moles would be

= \(\frac{322}{483}\) = 0.67 mol

For every 1 mole of Na₂SO₄.10H₂O, there are 2 moles of Na⁺ and 1 mole of SO₄²⁻.

Thus, 0.67 moles of Na₂SO₄.10H₂O will have 0.67×2= 1.34 moles of Na⁺ and 0.67 moles of SO₄²⁻.

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The different types of the elements does she have available to study are :

Hydrogen, Phosphorus , Oxygen, Carbon, Magnesium, Sulphur, Potassium, Chlorine.

1) The chemical formula of the phosphoric acid is : H₃PO₄

Elements : Hydrogen, phosphorus, oxygen

2) The chemical formula of the glucose is : C₆H₁₂O₆

Elements : Carbon, Hydrogen, oxygen

3) The chemical formula of the Epsom salts  is : MgSO₄

Elements : Magnesium, Sulfur, Oxygen

4) The chemical formula of the chlorate of potash is : KClO₃

Elements : Potassium, Chlorine and Oxygen.

Thus, the Hydrogen, Phosphorus , Oxygen, Carbon, Magnesium, Sulphur, Potassium, Chlorine are the different elements to study.

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Answer:

171

Explanation:

Answer:

the four main spheres of the earth are geosphere, hydrosphere, atmosphere and biosphere

Explanation:

geosphere consists of all rocks on Earth

atmosphere which are the gases that surrounds the earth

hydrosphere which is all the water on the earth

biosphere which are the living things on the earth