which of the following statements describe features found in all elimination reactions?

Explanation:

Molar mass of

B

=

10.81

g

⋅

m

o

l

−

1

. If there are 36 odd grams of

B

, there are approx.

7

2

×

N

A

boron atoms, where

N

A

is Avogadro's number.

Explanation:

35.76

⋅

g

10.81

⋅

g

⋅

m

o

l

−

1

×

6.022

×

10

23

m

o

l

−

1

=

?

?

Answer link

MAT

Nov 15, 2015

1.991

×

10

24

Explanation:

Molar mass of B = 10.81g/mol

So, 1 mole of B = 10.81g

and 1 mole =

N

A

=

6.023

×

10

23

By combining,

10.81g of B =

6.023

×

10

23

atoms of B

thus,

35.76g of B =

6.023

×

10

23

10.81

×

35.76

35.76g of B =

1.991

×

10

24

48.176 × 10¹⁷ atoms of boron are present in 8.0 × 10⁻⁶ moles of boron.

Avogadro's number is the number of particles in one mole of substance. 6.022 × 10²³ is known as Avogadro's constant / Avogadro's number.

Avogadro's number = 6.022 × 10²³

How to find the number of atoms ?

Number of atoms = Number of moles  × Avogadro's Number

                             = 8.0 × 10⁻⁶ × 6.022 × 10²³

                             = 48.176 × 10¹⁷ atoms of boron

Thus, from the above conclusion we can say that 48.176 × 10¹⁷ atoms of boron are present in 8.0 × 10⁻⁶ moles of boron.

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The diagram represents a setup for the laboratory preparation of oxygen gas using the process of water electrolysis.

In this setup, the apparatus consists of a container filled with water (\(H_2O\)) and two electrodes, an anode (A) and a cathode (C). The anode is connected to the positive terminal of a power supply, while the cathode is connected to the negative terminal.

During the electrolysis process, an electric current is passed through the water. As a result, water molecules are broken down into their constituent elements, hydrogen (\(H_2\)) and oxygen (\(O_2\)).

At the anode (A), the positively charged electrode, oxidation occurs. Here, water molecules lose electrons and are converted into oxygen gas (\(O_2\)) and positively charged hydrogen ions (\(H^+\)). This reaction can be represented as:

\(2H_2O(l) - > O_2(g) + 4H^+(aq) + 4e^-\)

At the cathode (C), the negatively charged electrode, reduction takes place. The hydrogen ions (H+) from the water molecules gain electrons and are converted into hydrogen gas (H2). This reaction can be represented as:

\(4H^+(aq) + 4e^- - > 2H_2(g)\)

Overall, the electrolysis of water results in the production of oxygen gas at the anode and hydrogen gas at the cathode. The oxygen gas collects in the upside-down test tube labeled "Oxygen gas" (R), while the hydrogen gas is collected separately. The water acts as the electrolyte, facilitating the flow of ions during the electrolysis process.

In summary, the setup shown in the diagram is used for the laboratory preparation of oxygen gas by water electrolysis. By passing an electric current through water, the water molecules are split into oxygen gas and hydrogen gas at the anode and cathode, respectively.

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The diagram represents a setup for the laboratory preparation of oxygen gas using the process of water electrolysis.

In this setup, the apparatus consists of a container filled with water (H₂O) and two electrodes, an anode (A) and a cathode (C). The anode is connected to the positive terminal of a power supply, while the cathode is connected to the negative terminal.

During the electrolysis process, an electric current is passed through the water. As a result, water molecules are broken down into their constituent elements, hydrogen (H₂) and oxygen (O₂).

At the anode (A), the positively charged electrode, oxidation occurs. Here, water molecules lose electrons and are converted into oxygen gas (O₂) and positively charged hydrogen ions (H+). This reaction can be represented as:

2H₂O(l) -> O₂(g) + 4H+(aq) + 4e-

At the cathode (C), the negatively charged electrode, reduction takes place. The hydrogen ions (H+) from the water molecules gain electrons and are converted into hydrogen gas (H₂). This reaction can be represented as:

4H+(aq) + 4e- -> 2H₂(g)

Overall, the electrolysis of water results in the production of oxygen gas at the anode and hydrogen gas at the cathode. The oxygen gas collects in the upside-down test tube labeled "Oxygen gas" (R), while the hydrogen gas is collected separately.The water acts as the electrolyte, facilitating the flow of ions during the electrolysis process.In summary, the setup shown in the diagram is used for the laboratory preparation of oxygen gas by water electrolysis. By passing an electric current through water, the water molecules are split into oxygen gas and hydrogen gas at the anode and cathode, respectively.

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The numerical value of the Ksp  of \(BaSO_{4}\) is 1.69 * 10^-20.

The Ksp is an equilibrium constant that shows the extent to which a substance is soluble in water. Now consider the fact that \(BaSO_{4}\) is almost insoluble in water.

i) The Ksp of the \(BaSO_{4}\) solution can be obtained from the relation;

Ksp = [\(Ba^{2+}\)] [\(SO_{4}^{2-}\)]

ii) The numerical value of the Ksp is obtained from; [1.30 × 10–10]^2 = 1.69 * 10^-20

iii) The reason for the toxicity of \(BaCO_{3}\) even though it is not more soluble that barium sulfate is that \(BaCO_{3}\) can dissolve in the gastrointestinal tract which is acidic leading to barium poisoning.

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Triacylglycerol is broken down by the enzyme lipase into fatty acids and glycerol. It is released by the pancreas and other digestive organs and is essential to the body's ability to digest and absorb fats.

Lipase is the enzyme that converts triacylglycerol into fatty acids and glycerol. The pancreas and other digestive organs release lipase, which is essential for the breakdown and absorption of fats in the body. Triacylglycerols are a kind of lipid that is frequently present in meals including meat, dairy goods, and oils. The triacylglycerol molecule's fatty acid ester linkages are hydrolyzed by lipase, releasing the molecules' separate fatty acids and glycerol. The body's cells can utilize these smaller parts for energy or store them as fat when they are absorbed into the circulation and delivered there. Other lipids, including phospholipids and cholesterol esters, are also broken down by lipase. and is essential for maintaining proper lipid metabolism and homeostasis in the body.

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Answer:

increase

Explanation:

because in endothermic reaction heat is absorbed

Answer:

Sun and the stars, nothing humans don't use fusion at all

Explanation:

Nuclear fusion reactions  power the  sun  in space. Humans currently use fusion in nuclear weapons by means of nuclear reactions, but researchers are seeking more applications.

There are two types of nuclear reactions which are nuclear fusion and nuclear fission .They involve the combination and disintegration of the element's nucleus respectively.

In nuclear fission, the nucleus of the atom is bombarded with electrons of low energy which splits the nucleus in to two parts .Large amount of energy is released in the process.It is used in nuclear power reactors as it produces large amount of energy.

In nuclear fusion,on the other hand, is a reaction which occurs when two or more atoms combine to form a heavy nucleus.Large amount of energy is released in the process which is greater than that of the energy which is released in nuclear fission process.

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The unit price per ounce is $0.55. The correct option is b. $0. 55

From the question,

We are to calculate the unit price per ounce

First, we will calculate the how many ounces are in 283.5 grams

From the give information,

28.35 g = 1 ounce

∴ 283.5 g = \(\frac{283.5}{28.35}\) ounces

283.5g = 10 ounces

Now,

Since the unit price is 283. 5 grams at $5. 48

That means

The unit price is 10 ounces at $5. 48

Now,

If 10 ounces cost $5.48

Then,

1 ounce will cost \(\frac{\$5.48}{10}\)

1 ounce will cost $0.548 ≅ $0.55

Hence, the unit price per ounce is $0.55. The correct option is b. $0. 55

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Explanation:

Z is the atomic number, which tells you the number of protons in the element and also its identity. A is the mass number, which tells you the number of protons plus the number of neutrons. X is the chemical symbol of the element, and it must correspond to the atomic number.

There can be emissions of radiations like gamma radiation. There can be emission of particles too like alpha particle. Therefore, A is 64, Z is 28 and X is Ni.

Nuclear decay is process in which the radioactive element releases particles or radiations. Alpha particles is ⁴₂He. Alpha particle is nothing but helium particle.

The balanced equation for the beta decay of ⁶⁴₂₉Cu.

⁶⁴₂₉Cu \(\rightarrow\)   ₂₈⁶⁴Ni     +   ⁰₋₁e

The atomic number, Z, refers to the number of protons inside the element as well as its identity. A refers to the mass number, that signifies the number is protons plus neutrons. The element's chemical symbol is X.

Therefore, A is 64, Z is 28 and X is Ni.

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The numbering system simply reflects the order of their discovery and does not imply a systematic progression or specific functional differences between them.

KV1 Channels: KV1 channels, also known as Shaker-related channels, are one of the earliest identified subtypes of potassium channels. They play a crucial role in regulating neuronal excitability. They are widely expressed in various tissues, including the nervous system, heart, and skeletal muscle.

KV2 Channels: KV2 channels are another subtype of potassium channels found in neurons. They exhibit distinct biophysical properties compared to KV1 channels. KV2 channels are involved in regulating neuronal firing patterns and neurotransmitter release.

KV3 Channels: KV3 channels, also known as Shaw-related channels, are a group of high-threshold, fast-activating/deactivating potassium channels. They are predominantly expressed in neurons, especially in regions involved in the generation of high-frequency action potentials, such as auditory neurons and certain types of interneurons.

KV4 Channels: KV4 channels belong to the A-type potassium channel family. They are characterized by their rapid activation and inactivation kinetics. KV4 channels are widely expressed in the brain, heart, and other tissues. In the brain, they are involved in regulating neuronal excitability and synaptic transmission.

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Answer:

A half-equation shows you what happens at one of the electrodes during electrolysis. Electrons are shown as e-. A half-equation is balanced by adding, or taking away, a number of electrons equal to the total number of charges on the ions in the equation.

When positive metal ions (cations) arrive at the negative electrode (the cathode), they gain electrons to form neutral metal atoms. This is called reduction. For example:

Pb2+ + 2e- → Pb

When negative non-metal ions (anions) arrive at the positive electrode (the anode), they lose electrons to form neutral atoms or molecules. This is called oxidation. For example:

2Br- → Br2 + 2e-

Writing half equations

Cations go to the cathode. They need to gain enough electrons to make them neutral. So an Al3+ ion needs to gain three electrons:

Al3+ + 3e- → Al

Half-equations for non-metal anions are more difficult to balance. For example, chloride ions make chlorine gas. Most non-metal elements formed in electrolysis are diatomic molecules (eg Cl2). For example:

Cl- → Cl2

Add in two electrons to balance the charge so that both sides have the same charge. The two electrons need to go on the right-hand side, so that both sides have an overall charge of -2. For example:

2Cl- → Cl2 + 2e-

Although your question lacks some information a general answer is provided

The ionic half equation =  \(2H^{+} (aq) + 2e^{-} ----> H_{2} (g)\)

The formation of hydrogen takes place at the negative electrode in a cell and the ionic half reaction that shows the formation of the hydrogen gas at the electrode is written as :

\(2H^{+} (aq) + 2e^{-} ----> H_{2} (g)\)

Ionic half equation is the representation of the chemical activity ( reaction ) occurring at one of the electrodes of a cell. to balance a half reaction we add or remove electrons equal to charges on the ions.

Hence the Ionic half equation for the formation of hydrogen during electrolysis is written as ; \(2H^{+} (aq) + 2e^{-} ----> H_{2} (g)\)

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The half-reaction MoO3(s) + 6H+(aq) + 6 e- → Mo(s) + 6 H2O\(MoO_{3}(s) + 6H^{+}(aq) + 6 e^{-} = Mo(s) + 6H_{2}O\)(l) has a reduction potential of 0.075 V.  The metals taht can be oxidized to \(MoO_{3}\) are ii and iii. The correct option to this question is E.

To determine which metals can be oxidized by \(MoO_{3}\), we need to compare the reduction potentials of the given metals with that of \(MoO_{3}\). The half-reaction with the higher reduction potential will be the one that gets reduced, while the other will be oxidized.
The reduction potential of \(MoO_{3}\) is given as 0.075 V.
Now, we will compare this value with the standard reduction potentials of the given metals:
i) Au: E°(Au3+ + 3 e- → Au(s)) = +1.50 V
ii) Cu: E°(Cu2+ + 2 e- → Cu(s)) = +0.34 V
iii) Ni: E°(Ni2+ + 2 e- → Ni(s)) = -0.23 V
From these values, we can see that both Cu and Ni have lower reduction potentials than \(MoO_{3}\), meaning they can be oxidized by \(MoO_{3}\). In contrast, Au has a higher reduction potential, so it cannot be oxidized by \(MoO_{3}\).
The metals that can be oxidized by \(MoO_{3}\) are Cu and Ni, so the correct answer is E) ii and iii.

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Answer: Molar masses 40.8 and 100.1

Explanation:

Answer:

Explanation:

As per the question, the most rational claim that the student can make about the aluminum metal is that 'it could be stretched into a thin wire' without breaking which shows its ductility. It is one of the most significant characteristics of a metal. Metals can conduct electricity in any state and not only when melted. Thus, option A is wrong. Options C and D are incorrect as metals neither have the same shape always nor do they break on hitting with a hammer. Therefore, option E is the correct answer.

Answer:

Yes, the other person is correct; the answer is E. It could be stretched into a thin wire.

Explanation:

Here is why it is NOT B:

"A briskly burning wood fire is plenty hot enough to melt aluminum. If it's just smoldering (like a lot of campfires) it won't create enough heat to melt aluminum."

Therefore, CAMPFIRES are not likely to melt aluminum if it is thrown in. Aluminum's melting point is 1,221 ° F. Typical campfires are about 900 ° F.

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Answer:

Phosphoric Acid is an acid-containing four atoms of oxygen, one atom of phosphorus, and three atoms of hydrogen. It is also known as phosphoric(V) acid or orthophosphoric acid.

Explanation:

Answer:

Phosphoric Acid is an acid-containing four atoms of oxygen, one atom of phosphorus, and three atoms of hydrogen. It is also known as phosphoric(V) acid or orthophosphoric acid.

Answer:

C. Bacterial Cell

Explanation:

Prokaryotic cells are cells that do not have a nucleus or other membrane-bound organelles. Bacterial cells are an example of prokaryotic cells. So the correct answer is Bacterial Cell.

I hope this helps!

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solid(particles are appropriately packed)  in solids there is no distance between the constituent particles

liquid(particles are closely packed).

gas(particles move freely) .

In a gas, the particles are evenly spaced out and not in any particular order. There is no regular arrangement of liquid next to one another. solids are regularly arranged and closely packed.

We can infer from the diagram that there is no space between the individual particles that make up solids. Without any intermolecular voids between the individual molecules, it is a completely packed structure.

In contrast, the particles in liquids are more closely packed than those in gaseous fluids, albeit they are more loosely packed than those in solids. We can now observe that there is a significant intermolecular gap between the constituent particles of gases. They are packed more flimsily than

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The best way to describe the types of bond on which oxidation and reduction depend on the nature of polar covalent bonds is "unequal sharing of electrons across a covalent bond" (Option C).

A polar covalent bond is formed when electrons are shared between two atoms, but the electrons are not shared equally. One atom attracts the electrons more than the other atom, creating a partial negative charge (δ-) and a partial positive charge (δ+) on the atoms. Because of this, oxidation and reduction states in carbon compounds depend on the nature of polar covalent bonds.

Therefore, the best way to describe the types of bond on which oxidation and reduction depend on the nature of polar covalent bonds is "unequal sharing of electrons across a covalent bond."

Option (c) "Unequal sharing of electrons across a covalent bond" is the correct answer.

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1. Gas B has the higher initial temperature. 2. The final thermal energy of gas A depends on the energy transferred between the gases, and 3. the final thermal energy of gas B depends on the energy transferred from gas A.

To determine which gas has the higher initial temperature, we compare their initial thermal energies. Gas A initially has 5000 J of thermal energy, while gas B has 8500 J of thermal energy. Since gas B has a higher initial thermal energy, it also has the higher initial temperature.

To find the final thermal energy of gas A, we need to consider the energy transferred between the gases. Without additional information about the nature of their interaction or any work done, we cannot determine the exact final thermal energy of gas A. It will depend on the energy transferred during the interaction.

Similarly, to find the final thermal energy of gas B, we need more information about the energy transfer between the gases. The final thermal energy of gas B will depend on its initial energy of 8500 J and the energy it receives from gas A during their interaction.

Without molar specific heat capacity about the energy transfer mechanism, it is not possible to calculate the exact final thermal energies of gas A and gas B. Additional information about the specific conditions and process of their interaction would be required to determine the final thermal energies accurately.

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The Complete question is

2.3 mol of monatomic gas A initially has 5000J of thermal energy. It interacts with 2.6mol of monatomic gas B, which initially has 8500J of thermal energy.

Which gas has the higher initial temperature?

1- Gas A or B?

2- What is the final thermal energy of the gas A?

3- What is the final thermal energy of the gas B?

Given data: A beaker containing 0.5 gm of HCl (mat-1) of a solution having 800 ml of water, mat-1, and 200 ml of sol-1.To explain the given data, first, we need to understand the meaning of the terms used in the question:Beaker: A container used for holding, mixing, and heating liquids.Containing:'

It means that a substance is present inside the beaker.Water: A colorless, odorless, tasteless liquid that is essential for most forms of life.On the basis of given data, we can conclude that:Volume of water = 800 mlVolume of solution = 200 mlMass of HCl = 0.5 gmConcentration of HCl = mat-1From the given data, it is clear that we have two beakers. One of them contains 800 ml of water and the other one contains 200 ml of the solution. The solution contains 0.5 gm of HCl (mat-1).This solution is added to water to make a solution having a mat-1 concentration of HCl.

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Answer:

D

Explanation:

Answer:

a supposition or proposed explanation made on the basis of limited evidence as a starting point for further investigation.

Explanation:

simpler definition: It's just a thing that you're willing to define before your experiment begins. You're predicting what'll happen, or what you'll earn through your experiment.

Let's say that you're doing an experiment based on using fertilizer on your plant. Your hypothesis can end up like this, "If I add fertilizer to my garden, then my plants will grow faster."

Please correct me if I'm wrong.

Answer:

5.17×10^21 ng

Explanation:

I assume you meant Tg if yes, the answer is this:

T is 10^12

5.17 Tg is 5.17×10^12 g

and n is 10^-9. but as we're converting g to ng, we don't include the - .

so now all we have to do is to put them all together!

5.17×10^12×10^9= 5.17×10^21 ng

if anything is unclear, ask me.

Giant molecules are also referred to as macromolecules and polymers when numerous molecules are combined. These atoms are arranged in a three-dimensional structure and are joined by covalent bonds.

A giant molecule, also known as a macromolecule, is a usually large molecule crucial to biophysical processes, such as a protein or nucleic acid. It is made up of many atoms that are covalently bound. Large non-polymeric molecules including lipids and macrocycles, as well as biopolymers, are the most prevalent macromolecules in biochemistry. In addition to synthetic fibers, giant molecules can also be found in research materials like carbon nanotubes.

Different experts use different terminology for giant molecules. For instance, in biology, giant molecules refer to the four immense molecules that make up living things, while in chemistry, it refers to aggregates of two or more molecules that are held together by intermolecular forces rather than covalent bonds yet that is difficult to dissolve apart. The term giant molecule is frequently referred to as high polymer in British English.

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The electron pair geometry for an ammonia molecule, NH₃ is tetrahedral.

According to VSPER theory :

for  NH₃ : number of electron pairs arre:

Number of electron pairs = 1 / 2 [ V + N  -C + A]

where V is number of valence electrons on central atom = 5

N = number of monovalent electron = 3

C = charge of cation = 0

A  = charge of anion = 0

number of electron pairs = 1 / 2 [ 5 + 3 ]

                                          = 4

The 4 electrons group are present out of which three are bonding groups and one present as lone pair of electron therefore the electron geometry is tetrahedral and the molecular geometry is trigonal pyramidal.

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Answer:

A i just did it. And yes i do go to k12

Explanation:

Answer:

1. Amine.

2. Alcohol.

3. Carboxylic Acid.

4. Halocarbon.

Explanation:

The correct answer according to the tile are Amine, Alcohol, Carboxylic acid, Halocarbon.

How can hydrocarbons be classified based on their structure?

Hydrocarbons can be classified as either aromatic or aliphatic compounds, depending on the presence of a benzene ring.

What is the most common classification of hydrocarbons?

Alkanes are hydrocarbons in which all of the bonds are single bonds. Alkenes are hydrocarbons that contain a carbon-carbon double bond.

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Answer:

B. its tilt toward the sun

Explanation:

Answer:The primary reason is the tilt of the earth towards the sun

Answer:

C: 10m

Explanation:

Work Done = Force x Distance

500 = 50 x Distance

To get to 500 multiply 50 by 10!

So, the box slid 10m.

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Answer:

The Universe was once just the radius of the Earth-to-the-Sun, which happened when the Universe was about a trillionth (10-12) of a second old. .

Explanation:

Answer: like 25 0's i think

Explanation:

If more \(H_{2}\) and \(N_{2}\) are added to the reaction 3\(H_{2}\) + N2 → 2\(NH_{3}\) after it reaches equilibrium, two events will occur Shift in Equilibrium and Increased Yield of \(NH_{3}\)

1. Shift in Equilibrium: According to Le Chatelier's principle, when additional reactants are added, the equilibrium will shift in the forward direction to consume the added reactants and establish a new equilibrium. In this case, more \(NH_{3}\) will be produced to counteract the increase in \(H_{2}\) and \(N_{2}\).

2. Increased Yield of \(NH_{3}\): The shift in equilibrium towards the forward reaction will result in an increased yield of \(NH_{3}\). As more \(H_{2}\) and \(N_{2}\) are added, the reaction will favor the production of \(NH_{3}\) to maintain equilibrium. This will lead to an increase in the concentration of \(NH_{3}\) compared to the initial equilibrium state.

It is important to note that the equilibrium position will ultimately depend on factors such as the concentrations of \(H_{2}\), \(N_{2}\), and \(NH_{3}\), as well as the temperature and pressure of the system. By adding more reactants, the equilibrium will adjust to achieve a new balance, favoring the formation of more \(NH_{3}\).

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