which reagent would distinguish betwene benzene and cyclohezene.

The substance in the image above would be classified as a mixture of elements (option E).

A compound is a substance formed by chemical bonding of two or more elements in definite proportions by weight.

On the other hand, a mixture is made when two or more substances are combined, but they are not combined chemically.

According to this question, an image is shown with two different substances or elements as distinguished by coloration (white and purple). These elements are combined but not chemically bonded, hence, is a mixture.

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Answer:

speed= distance/time

= 100/5=20mph

According to the question the correct answer is e. compound found in vinegar is acetic acid.

Vinegar is a dilute solution of acetic acid in water, typically containing between 5-8% acetic acid by volume. Acetic acid is a weak organic acid with the chemical formula CH₃COOH. It is produced by the fermentation of ethanol by acetic acid bacteria, and is responsible for the sour taste and pungent smell of vinegar. While other acids such as formic acid, propionic acid, and butyric acid may also be present in vinegar, acetic acid is the main acid responsible for its acidity.

Therefore, the correct option is E.

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answer is: O

o goes from 0 to -2, so it is the element that is reduced

hope this helps! ;)

Answer:

I'd say Mg.

Explanation:

The reducing agent is the agent that is oxidized (losses electrons).

The oxidizing agent is the agent that is reduced (gains electrons).

For the mentioned reaction:

2Mg + O2→ 2MgO.

Mg (oxid. no. = 0) is converted to MgO (oxid. no. of Mg = +2), which means that Mg losses 2 electrons and is oxidized.

So, the reducing agent is Mg.

Answer:

Atomic number

Explanation:

Because atomic number is unique for each element and never changes

The electricity generated that powers the watch by zinc in the battery combines with oxygen in the air, zinc oxide forms reaction is a product.

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You would predict that indoleacetic acid, a plant hormone, would have a(n)  carboxyl group.

The auxin group of naturally occurring plant hormones most frequently found is indole-3-acetic acid. It would be the most well-known auxin as well as the focus of in-depth research by plant physiologists. IAA would be an indole derivative with a carboxymethyl substituent.

The primary auxin in plants contains IAA, which controls a variety of growth and development activities including cell division elongation, tissue differentiation, apical dominance, as well as reactions to pathogens, light, including gravity.

Therefore,  indoleacetic acid, a plant hormone, would have a(n)  carboxyl group.

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Answer:

1.VOLUME– The amount of space an object takes up. Basic Unit (SI Unit) for Solids – Cubic Meter, m3. LENGTH/DISTANCE – The measurement between two points.

2.one particle per cubic meter.

3.it means it is heavier

4.In a liquid the particles are still close together but a little further apart than in a solid.

5.In gases the particles are much further apart than in solids or liquids.

Explanation:

thats all i can type lol

The answer is purity of all freactions.

Miscible liquids must be separated during the distillation process known as fractional distillation. The procedure entails numerous condensations and distillations, and the mixture is often broken down into its component elements. When the combination is heated to a particular temperature where portions of the mixture begin to evaporate, the separation occurs.

Two helpful physical characteristics of a liquid are its boiling point and refractive index (RI). They serve as identifiers. The purity of the sample under examination is also measured using the RI.

So that means, Refractive index is used for purity of all the fractions of the sample.

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The 3+ charge next to the symbol indicates a loss of 3 electrons

When atoms form ions, they lose or gain electrons. The nucleus remains intact; there is no change in the number of protons and neutrons. A loss of electrons produces a positively charged ion (a cation).

Ex= As aluminium lost 3 electrons, its ion will have a 3+ charge since the ion has 3 more positively charged protons than negatively charged electrons (ie, 13 protons, 10 electrons).

Atoms of elements which lose electrons develop a positive charge, such as the aluminium ion, Al3+ , which results when an aluminium atom loses three electrons; or the magnesium ion, Mg2+ , which results when a magnesium atom loses two electrons.

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The +2.00 V is the standard cell potential for a galvanic cell that consists of al3 /al and cu2 /cu half-cells.

What is galvanic cell ?

A galvanic cell or voltaic cell is an electrochemical device that transforms chemical energy from spontaneous redox reactions into electrical energy. Galvanic cell A voltaic cell is an electrochemical device that uses chemical reactions to produce electricity.

What is standard cell ?

A standard cell is a collection of transistor and connection structures that performs boolean logic operations (such as AND, OR, XOR, XNOR, inverters) or storage operations (flipflop or latch).

The standard half reactions are

Al3+ (aq) + 3 e- -------> Al (s); E0 (Al3+/Al) = -1.66 V

Cu2+ (aq) + 2 e- ------> Cu (s); E0 (Cu2+/Cu) = +0.34 V

Since Cu2+/Cu has a more positive standard reduction potential as compared to Al3+/Al, hence, Cu2+ will be reduced while Al will be oxidized. The half reactions comprising the redox reaction are then

Reduction: Cu2+ (aq) + 2 e- --------> Cu (s)           E0red = +0.34 V

Oxidation: Al (s) -------> Al3+ (aq) + 3 e-              E0ox = -E0(Al3+/Al) = -(-1.66 V) = +1.66 V

The redox reaction is given as

3 Cu2+ (aq) + 2 Al (s) -------> 3 Cu (s) + 2 Al3+ (aq)

E0cell = E0red + E0ox

= (+0.34 V) + (+1.66 V)

= +2.00 V

Therefore, +2.00 V is the standard cell potential for a galvanic cell that consists of al3 /al and cu2 /cu half-cells.

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The density of the metal is approximately 6.90 g/cm³ for a metal (fw 236.9 g/mol) to crystallize.

In a body-centered cubic (BCC) unit cell, there are 2 atoms, one at each corner of the cube, and one at the center of the cube. The edge length of the BCC unit cell (a) can be calculated using the radius of the metal atom (r) as:

a = 4r / √3

Substituting the given value of the radius, we get:

a = 4(1.74 Å) / √3

a ≈ 3.17 Å

The volume of the BCC unit cell can be calculated as:

V = a³

Substituting the value of a, we get:

V = (3.17 Å)³

V ≈ 32.1 ų

Since there are two atoms per unit cell, the volume of the metal atoms in the unit cell is:

V_atom = (4/3)πr³ x 2

Substituting the value of the radius, we get:

V_atom = (4/3)π(1.74 Å)³ x 2

V_atom ≈ 9.65 ų

The packing efficiency of a BCC unit cell is 0.68, so the volume of the unit cell occupied by the metal atoms is:

V_metal = 0.68 x V

Substituting the value of V, we get:

V_metal = 0.68 x 32.1 ų

V_metal ≈ 21.8 ų

The mass of one metal atom can be calculated using its atomic weight:

mass_atom = atomic weight / Avogadro's number

Substituting the given atomic weight and Avogadro's number, we get:

mass_atom = 236.9 g/mol / 6.022 x \(10^{23}\)/mol

mass_atom ≈ 3.94 x \(10^{-22}\) g

The density of the metal can be calculated as:

density = mass/volume

where the mass is the mass of the atoms in the unit cell and the volume is the volume of the unit cell occupied by the atoms.

Substituting the values we have calculated, we get:

density = (2 x 3.94 x \(10^{-22}\) g) / (21.8 ų x (1 cm/10 Å)³)

density ≈ 6.90 g/cm³

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Answer:

atomic number

Explanation:

atomic number is the number of protons

Answer:

The second part of the Dalton's atoms

theory says all atoms of a given element are identical in mass and properties.

Answer:

i have no idea and i dont get it

The kinds of the solids are;

SiO2 - Covalent network solid

C6H12O6 - Covalent solid

KI - Ionic solid

A covalent network solid, often referred to as a network covalent solid or just a network solid, is a category of solid material in which the atoms that make up the material are strongly covalently linked to one another, forming an extended three-dimensional network structure.

Covalent network solids are kept together by a dense network of covalent bonds, as opposed to molecular or ionic solids, which are held together by weaker intermolecular forces or ionic interactions, respectively.

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The value of Kp at temperature 2027° is 1.5×10⁻³.

What are equilibrium reactions?

Chemical equilibrium in a reaction is the situation in which both the reactants and products are present at concentrations that do not continue to fluctuate over time, preventing any discernible change in the system's features.

What is equilibrium constant (Kp)?

Kp stands for the equilibrium constant expressed in terms of partial pressure. The partial pressure of the products is raised by a certain power, which is equal to the substance's coefficient in the balanced equation, and the partial pressure is divided by the partial pressure of the reactants to arrive at the equilibrium constant, Kp.

Kp = Kc (RT)^{Δn}

Where,

Kp = Equilibrium constant based on partial pressures

Kc = Equilibrium constant measured in moles per litre.

As given,

N₂(g) + O₂(g) ⇄ 2NO(g)

Kc = 1.5×10⁻³

T = 2027°

T = (2027 + 273) K = 2300K.

Evaluate the value of Kp:

Δn = (no. of moles of products - no. of moles of reactants)

Δn = 2 - 2

Δn = 0

Since, Δn = 0.

From above equation,

Kp = Kc × (RT)^{Δn}

Substitute values respectively,

Kp = Kc × (RT)⁰

Kp = Kc = 1.5×10⁻³

Kp = 1.5×10⁻³.

Hence, the value of Kp at temperature 2027° is 1.5×10⁻³.

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The number of signals seen in a 1H NMR spectrum is dependent on the number of distinct hydrogen environments in a molecule. Each unique hydrogen environment will give rise to a signal in the spectrum.

To answer your question, it's necessary to have the compound's structure or chemical formula provided. In a 1H NMR spectrum, signals arise from the different hydrogen environments within the molecule. Without the compound's information, I'm unable to determine the number of signals expected. Please provide the compound's details so I can assist you further.

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Answer:

An air mass that is described as having warm and moist air is called maritime tropical. This occurs when heat and moisture are transferred to the overlying air from the warm waters of the ocean or seas. Maritime Tropical air mass comes from the warm waters of the tropics and the Gulf of Mexico. When warm air moves northward moist air is transported to the United States which causes the increase in precipitation. Maritime Tropical masses are often felt in the Southeast part of the United States.  

Explanation:

The percentage abundance is a measure of ratio of the number of each isotope and the total number of the element. The percentage abundance of each isotope is :

Number of each isotope in the sample :

Total number of sample = 50

The percentage natural abundance of the isotopes can be calculated :

Number of each isotope ÷ total number of sample

Percentage abundance of Le isotopes

Therefore, the percentage abundance of Le - 19, Le - 17 and Le - 15 isotopes are 0.32, 0.44 and 0.24 respectively.

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The half-reaction Cl2(g) + 2e- → 2Cl-(aq) is a reduction half-reaction, while the half-reaction Pb(s) → Pb2+(aq) + 2e- is an oxidation half-reaction.  In a redox reaction, there are two half-reactions: oxidation and reduction. Oxidation involves the loss of electrons, while reduction involves the gain of electrons.

Looking at the half-reaction Cl2(g) + 2e- → 2Cl-(aq), we can see that Cl2 gains two electrons, which means it is being reduced. Therefore, this is a reduction half-reaction.
In the half-reaction Pb(s) → Pb2+(aq) + 2e-, we can see that Pb loses two electrons, which means it is being oxidized. Therefore, this is an oxidation half-reaction.
To summarize, the half-reaction Cl2(g) + 2e- → 2Cl-(aq) is a reduction half-reaction because Cl2 gains electrons, while the half-reaction Pb(s) → Pb2+(aq) + 2e- is an oxidation half-reaction because Pb loses electrons.

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120 KJ of heat is absorbed in this reaction.

As we know

Where W is the provided mass of carbon, which is 30g, n=W/M

M is the carbon molar mass. 30 / 12 = 2.5 moles at 12g/mol.

As a result, the heat absorbed by 2.5 moles of carbon is equal to 120 kJ, or half the heat absorbed by 5 moles of carbon, or 239.9 kJ.

The heat evolved (either emitted or absorbed) during a process that runs at constant pressure is equivalent to the change in enthalpy. The internal energy (U) and pressure-volume product (PV), are both supplied by the equation:

H=U+PV

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Answer:

B) It is not balanced for oxidation state or for number of atoms

Explanation:

I got this question correct on my Edge quiz, so I know that this is the right answer.

The reactant side has 2 oxygen atoms, while the product side only has 1. This means the mass isn't balenced. In addition, the oxidation (charge) on the reactant side is 0, while it's -2 on the product side. This means the oxidation nor mass is balenced.

Hope that helps you!

Answer:

b

Explanation:

We need to add 837.5 mL of water to the original 1.25 M potassium chloride solution to make a 0.50 M potassium chloride solution.

To solve this problem, we can use the formula for dilution:

C1V1 = C2V2

Where C1 is the initial concentration, V1 is the initial volume, C2 is the final concentration, and V2 is the final volume.

Given:
Initial concentration (C1) = 1.25 M
Initial volume (V1) = 337 mL
Final concentration (C2) = 0.50 M

We need to find the final volume (V2) by adding water to the original solution.

Rearranging the formula, we have:

V2 = (C1V1) / C2

Plugging in the values:

V2 = (1.25 M * 337 mL) / 0.50 M

Simplifying the equation:

V2 = 837.5 mL

Therefore, you need to add 837.5 mL of water to the original 1.25 M potassium chloride solution to make a 0.50 M potassium chloride solution.

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The correct description of chemical equilibrium is: the rate of reaction of reactant molecules to form products is the same as the rate of reaction of product molecules to form reactants. Correct option is d.

Chemical equilibrium is a state where the forward and reverse reactions occur at the same rate, maintaining constant concentrations of products and reactants. It is important to note that equilibrium doesn't mean equal concentrations of products and reactants; it means their rates of conversion are equal.

The frequencies, velocities, or concentrations of the molecules are not necessarily identical. In a chemical equilibrium, the system is in a dynamic balance, and the relative concentrations of reactants and products remain constant over time, as long as no external factors are changed (e.g., temperature, pressure, or concentration).

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7.20 moles of NaBH₄ requires 3.60 moles of benzil in the synthesis of meso-hydrobenzoin. To answer this question, we first need to write the balanced chemical equation for the reduction of benzil using NaBH₄:

C₆H₅C(O)C(O)C₆H₅ + 2 NaBH₄ → C₆H₅C(OH)C(O)C₆H₅ + 2 NaBO₂ + 2 H₂

From this equation, we can see that each mole of benzil reacts with 2 moles of NaBH₄. Therefore, to determine how many moles of benzil are necessary to completely react with 7.20 moles of NaBH₄, we simply divide 7.20 by 2:
7.20 moles NaBH₄ / 2 moles NaBH₄ per mole of benzil = 3.60 moles benzil

So an explanation of the answer is that since each mole of benzil reacts with 2 moles of NaBH₄, we need to divide the total number of moles of NaBH₄ by 2 to determine the number of moles of benzil necessary for complete reaction. Therefore, 7.20 moles of NaBH₄ requires 3.60 moles of benzil.

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The correct formula for a compound formed from the elements Al and O is Al₂O₃.

Correct option is C.

Aluminum oxide is an oxide of aluminum with the chemical formula Al₂O₃ which is primarily composed of two chemically bonded aluminum and oxygen atoms. Aluminum oxide chemical compounds exist in various forms, with the most common being alpha, gamma, and theta.

The solid compound is an odorless, white powder which is insoluble in water and is a major component of the Earth's crust. It occurs naturally as corundum, bauxite, and cryolite and can be synthetically produced through burning aluminum metal or dissolving alumina tri-hydrate.

Aluminum oxide is widely used in a variety of applications due to its unique properties such as hardness, thermal conductivity, electrical conductivity, optical properties, and chemical inertness.

Correct option is C.

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Answer:

When hydrogen gas combines with nitrogen to form Ammonia the following chemical reaction will take place. Our equilibrium reaction will be N2(g) + 3H2(g) ⇔ 2NH3(g) + Heat. In this case, Hydrogen and nitrogen react together to form ammonia.

Explanation:

Answer:

When hydrogen gas combines with nitrogen to form Ammonia the following chemical reaction will take place. Our equilibrium reaction will be N2(g) + 3H2(g) ⇔ 2NH3(g) + Heat. In this case, Hydrogen and nitrogen react together to form ammonia.

Answer:

that it i think

Explanation:

the earth revolves around the Sun once each year and spins on its axis of rotation once each day. This axis of rotation is tilted 23.5 degrees relative to its plane of orbit around the Sun. The axis of rotation is pointed toward Polaris the North Star. As the Earth orbits the Sun the tilt of Earth’s axis stays lined up with the North Star.