Draw structures according to the following
names.
a. 4-methyl-1,5-octadiyne
b. 4,4-dimethyl-2-pentyne
c. 3,4,6-triethyl-5,7-dimethyl-1-nonyne

The rock cycle is a theoretical framework that explains how various types of rocks are created, changed over time, and cycled through the Earth's crust.



Energy and material movement are both a part of the rock cycle.Igneous rocks are the first to form in the rock cycle after molten rock (lava or magma) cools and hardens. Both the Earth's surface and its deep crust can experience this process. This technique uses heat from within the Earth as its energy source.Igneous rocks can be worn and eroded by wind, water, and ice over time, resulting in the formation of sediment-sized fragments. After being moved by water or wind, these sediments might then be deposited in layers.on the surface of the Earth. The erosive forces, such as wind and water, provide the energy for this process.These sediment layers may eventually be compacted and buried, resulting in the formation of sedimentary rocks. The weight of the underlying sediment layers and the heat and pressure produced by the Earth's internal processes provide the energy for this process.In addition to being subjected to heat and pressure, sedimentary rocks can also undergo metamorphism. The heat and pressure produced by the Earth's internal processes provide the energy needed for this operation.Finally, further heat and pressure can be applied to all types of rocks, causing them to melt and create new igneous rocks, completing the rock cycle.


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Deficiency in B6 (pyridoxal phosphate) can negatively impact several pathways in the human body, including the metabolism of tryptophan, homocysteine, and neurotransmitters. Therefore, it is essential to ensure adequate intake of B6 through a balanced diet or supplementation to prevent deficiencies and associated health problems.

One of the pathways that can be negatively impacted by a deficiency in B6 is the metabolism of tryptophan, an essential amino acid. Pyridoxal phosphate is required for the conversion of tryptophan to niacin (vitamin B3). Without adequate B6, the conversion of tryptophan to niacin is impaired, leading to a deficiency in niacin and the development of pellagra, a condition characterized by dermatitis, diarrhea, and dementia.

Another pathway that can be negatively impacted by a deficiency in B6 is the metabolism of homocysteine, an amino acid derived from methionine. Pyridoxal phosphate is required for the conversion of homocysteine to cysteine, an essential amino acid. Without adequate B6, homocysteine levels can increase, leading to hyperhomocysteinemia, a condition associated with an increased risk of cardiovascular disease, stroke, and cognitive decline.

Furthermore, pyridoxal phosphate is also involved in the synthesis of neurotransmitters such as serotonin, dopamine, and gamma-aminobutyric acid (GABA). A deficiency in B6 can impair the synthesis of these neurotransmitters, leading to mood disorders such as depression and anxiety.

In summary, a deficiency in B6 (pyridoxal phosphate) can negatively impact several pathways in the human body, including the metabolism of tryptophan, homocysteine, and neurotransmitters. Therefore, it is essential to ensure adequate intake of B6 through a balanced diet or supplementation to prevent deficiencies and associated health problems.

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Answer:

OA. YESS

Explanation:

They will because they are all over America.

1. The limiting reactant is H₂O

2. The number of mole of H₃PO₄ formed during the reaction is 5.33 moles

The limiting reactant for the reaction between 2 moles of P₄O₁₀ and 8 moles of H₂O can be obtained as shown below:

P₄O₁₀ + 6H₂O -> 4H₃PO₄

From the balanced equation above,

1 mole of P₄O₁₀ reacted with 6 moles of H₂O

Therefore,

2 moles of P₄O₁₀ will react with = 2 × 6 = 12 moles of H₂O

From the above calculation, a higher amount of H₂O is required to react completely with 2 moles of P₄O₁₀

Thus, we can say that H₂O is the limiting reactant.

The mole of H₃PO₄ formed from the reaction can be obtained as illustrated below:

P₄O₁₀ + 6H₂O -> 4H₃PO₄

From the balanced equation above,

6 moles of H₂O reacted with 4 moles of H₃PO₄

Therefore,

8 moles of H₂O will react with = (8 × 4) / 6 = 5.33 moles of H₃PO₄

Thus, we can conclude that the number of mole of H₃PO₄ formed is 5.33 moles

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In salt hydrolysis, the conjugate bases of weak acids yield basic solutions, while the conjugate acids of weak bases yield acidic solutions. This phenomenon occurs because the hydrolysis of a salt produces either hydroxide ions or hydronium ions, depending on the nature of the salt.

For example, when the salt of a weak acid and a strong base is hydrolyzed, the conjugate base of the weak acid is formed, which acts as a weak base. This weak base can then react with water to produce hydroxide ions, leading to an increase in the pH of the solution and a basic solution. Conversely, when the salt of a weak base and a strong acid is hydrolyzed, the conjugate acid of the weak base is formed, which acts as a weak acid. This weak acid can then react with water to produce hydronium ions, leading to a decrease in the pH of the solution and an acidic solution.

It is important to note that the strength of the acid or base will also influence the pH of the solution, as stronger acids and bases will have a greater impact on the pH. Additionally, the concentration of the salt and the water will also impact the degree of hydrolysis and the resulting pH of the solution.

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Answer:

A. The atomic radius increases (in a group) with the increasing atomic number. This is because atomic size generally increases from top to bottom within a group because the greater the number of protons means the greater amount of electrons. The amount of electrons in orbitals determine an atom's size/radius.

B. Since Group 1A (Alkali Metals) are metals, they tend to form cations. Cations are always smaller than their original atom because the greater positive charge from the nucleus closes in the space between it and the electrons, thus "shrinking" its size. This is why the ionic radii are smaller than the atomic radii of the same element.

I hoped this helped <3

Explanation:

A conjugate acid-base pair consists of two substances that are related to each other by the loss or gain of a hydrogen ion. The compound that donates a hydrogen ion in an acid-base reaction is the acid, while the compound that accepts the hydrogen ion is the base.

This relationship between the acid and the base gives rise to a conjugate acid-base pair. The acid in the pair is typically a species that has an acidic proton, while the base in the pair is the species that is produced when the acid loses a proton. For example, consider the reaction of acetic acid (CH3COOH) with water (H2O). The acid in this reaction is acetic acid, which donates a hydrogen ion to water. The base in the reaction is the acetate ion (CH3COO-), which is produced when acetic acid loses a hydrogen ion.

Thus, the conjugate acid-base pair in this reaction is CH3COOH (acid) and CH3COO- (base). These two species are related to each other by the loss or gain of a hydrogen ion, and they are said to be conjugate to each other.

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Strontium has an electron configuration of [Kr]5s²

In an atom there are levels of energy in the shell and sub shell  

This energy level is expressed in the form of electron configurations.  

Writing electron configurations starts from the lowest to the highest sub-shell energy level. There are 4 sub-shells in the shell of an atom, namely s, p, d and f. The maximum number of electrons for each sub shell is  

s: 2 electrons  

p: 6 electrons  

d: 10 electrons and  

f: 14 electrons  

From an electron configuration of [Kr]5s² can be concluded :

If we look at the periodic system, the elements that meet the requirements in question are Strontium (Sr)

Answer:

D) strontium

When precipitating the lead cation, you were told to place the test tube in ice after adding the appropriate reagent because this helps to increase the solubility of the lead cation and allows for more efficient precipitation.

By lowering the temperature of the solution, the solubility of the lead cation is decreased, causing it to precipitate out of solution more readily. This is known as the "common ion effect" and is a common technique used in chemistry to promote precipitation reactions.

By placing the test tube in ice, the reaction is slowed down, allowing for more complete precipitation of the lead cation and resulting in a more accurate measurement of the amount of lead present in the solution.

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The enthalpy change per mole of the substance is approximately 967.8 kJ/mol.

To calculate the enthalpy change per mole of the substance, we need to use the given information: mass of the substance, molecular weight, and heat produced. Here are the steps:
1. Determine the number of moles of the substance combusted:
Number of moles =\frac{ mass }{molecular weight}
Number of moles = \frac{72.476 g }{183.031 g/mol}
Number of moles ≈ 0.396 mol
2. Calculate the enthalpy change per mole:
Enthalpy change per mole = \frac{heat produced }{ number of moles}
Enthalpy change per mole =\frac{ 383.35 kJ }{ 0.396 mol}
Enthalpy change per mole ≈ 967.8 kJ/mol

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It's sunny in new york, but it is cool, we will expect to find lizard under a rock or in a hole in the ground, where temperature is more than outside.

Lizards are not easily survive in the winter season as they are cold blooded animal, so their body will not active in the winter season.

During the winter season or in the cold weather, lizards will go to the places where they feel less cooling. And these places be like inside the rocks, under a hole, under the ground, in the trunks of trees, etc. due to high temperature.

Hence, options (1) and (4) are correct.

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The student's claim of 4.64 × 10^24 molecules is incorrect, and the correct number of molecules of ammonium acetate used in the reaction is 6.022 × 10^22 molecules.

The mistake the student made is assuming that the molar mass of ammonium acetate directly corresponds to the number of molecules. However, the molar mass of a substance represents the mass of one mole of that substance, not the number of molecules.

To determine the correct number of molecules of ammonium acetate used in the reaction, we need to use Avogadro's number, which relates the number of particles (atoms, molecules, etc.) in one mole of a substance.

Avogadro's number is approximately 6.022 × 10^23 particles/mol. Given that the student used 0.100 mol of ammonium acetate, we can calculate the correct number of molecules by multiplying the number of moles by Avogadro's number:

Number of molecules = (0.100 mol) × (6.022 × 10^23 molecules/mol)

Performing the calculation, we find that the correct number of molecules of ammonium acetate used in the reaction is 6.022 × 10^22 molecules.

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Answer:

Mixing chamber

Answer:

HNO2: acid.

SO3 (2-): base.

NO2 (-): conjugate base.

HSO3 (-): conjugate acid.

Explanation:

First, we have to understand the concept of Brønsted-Lowry acid-base: An acid-base reaction, according to the Brønsted-Lowry definition, is a transfer of a proton from one molecule or ion to another.

A conjugate acid is the particle produced when a base accepts a proton.

A conjugate base is the particle produced when an acid donates a proton.

Let's see the reaction (6):

You can note that the acid would be HNO2 (its name says it all: nitrous acid), and therefore, SO3 (2-) would be the base.

Based on the conjugate acid and conjugate base: HSO3 (-) would be the conjugate acid because SO3 (2-) is accepting the proton (H (+)) from HNO2, and the NO2 (-) would be the conjugate base because NO2 (-) is the result of donating a proton from HNO2.

Answer:

Law of Conservation Matter

The "return" statement immediately halts execution of the current method and allows us to pass back a value to the calling method. When encountered in a method, the return statement exits the method's execution flow and transfers control back to the caller.

It is a fundamental mechanism for returning a result or value from a method. By specifying the return keyword followed by the desired value or variable, we can effectively terminate the current method and provide the desired output to the calling code.

The returned value can be utilized in various ways, such as assigning it to a variable, using it in expressions, or passing it as an argument to another method.

Overall, the return statement plays a crucial role in controlling program flow and enabling the exchange of information between methods in a structured manner.

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If an IV bag of 500 mL D5W is infusing at a rate of 50 mL/hr, and the IV bag was hung at 11:30 am, the infusion will be complete in 10 hours and 30 minutes.

To determine the time it takes for the infusion to be complete, we need to consider the volume of the IV bag and the infusion rate.

The IV bag contains 500 mL of D5W (5% dextrose in water). The infusion pump is set at a rate of 50 mL/hr, which means 50 mL of the solution is administered every hour.

To find the time it takes for the infusion to be complete, we divide the total volume of the IV bag (500 mL) by the infusion rate (50 mL/hr):

Time = Volume / Rate

Time = 500 mL / 50 mL/hr

Time = 10 hours

Since the IV bag was hung at 11:30 am, we add 10 hours to this time to determine when the infusion will be complete:

11:30 am + 10 hours = 9:30 pm

Therefore, the infusion will be complete at 9:30 pm.

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Particle model B represents the average kinetic energy of gas particles according to kinetic molecular theory. Therefore, the correct option is option B.

The average kinetic energy of gas particles is exactly proportional to the temperature of the gas, according to kinetic molecular theory. This essential notion contributes to the understanding of gas behaviour and properties. The kinetic molecular hypothesis states that gas particles are always moving at random. They move in straight lines until they clash with other particles or the container's walls.

During collisions, gas particles exchange energy with one another. When one particle collides with another, its kinetic energy might be gained or lost, but the total energy in the system remains constant. The average kinetic energy of gas particles is related to the gas's absolute temperature. The average kinetic energy of the particles increases as the temperature rises.

Therefore, the correct option is option B.

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The flask that has the most acidic solution is b. Flask B with a pH of 2.31.

To determine which flask has the most acidic solution, we need to compare their pH values. Lower pH values indicate more acidic solutions. Here's the information we have for each flask:

a. Flask A: pOH = 8.9, so we need to find the pH. Since pH + pOH = 14, pH = 14 - 8.9 = 5.1
b. Flask B: [H⁺] = 4.9 x 10⁻³ M, we can use the formula pH = -log[H⁺], so pH = -log(4.9 x 10⁻³) ≈ 2.31
c. Flask C: [OH⁻] = 2.8 x 10⁻⁷ M, first we find the pOH using the formula pOH = -log[OH⁻], so pOH = -log(2.8 x 10⁻⁷) ≈ 6.55, and then find the pH: pH = 14 - 6.55 ≈ 7.45
d. Flask D: pH = 5.5

Now we can compare the pH values:
Flask A: pH = 5.1
Flask B: pH = 2.31
Flask C: pH = 7.45
Flask D: pH = 5.5

The most acidic solution has the lowest pH value, which is Flask B with a pH of 2.31. So, the answer is b. Flask B.

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Answer: A

Explanation:

5.0 g / 56 g/mol is the numerical expression that gives the number of moles in 5.0 g of CaO.

HOW TO FIND NUMBER OF MOLES:

CaO = 40g/mol + 16g/mol = 56g/mol

Number of moles = 5.0g ÷ 56g/mol

Therefore, 5.0 g / 56 g/mol is the numerical expression that gives the number of moles in 5.0 g of CaO.

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Answer:

Bent

Explanation:

pls brainlist

The number of moles of water that would be produced will be 4 moles

From the balanced equation of the reaction:

2H2 + O2 ---------> 2H2O

Mole ratio of H2 and H2O = 2:1

Mole of H2 = 8 moles

Equivalent mole of H2O = 8/2

                                         = 4 moles

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Answer: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 7s2 5f14 6d10 7p6

Explanation:

Answer:

a. Atom B will be least likely to react with other atoms as it is contains 10 electrons in neutral state with E.C. : 2,8. Since it has an octet, it is stable and does not react with other atoms.

b. Atom C forms a positive ion. It contains 11 electrons in neutral state with E.C. : 2,8,1. To attain an octet, it will donate an electron to form a positive ion.

The increase in body temperature would be 3.5 °C

Mass of jogger - 65 kg

Heat generated - 8.0*10⁵ J

Increase in body temperature can be calculated by the following formula - Q = m*c*∆t, where Q is heat, m is mass of body, c is specific heat capacity and ∆t is change in temperature.

Specific heat capacity of human body = 3500 J/kg °C.

Keeping the values in equation-

∆t = Q/m*c

∆t = 8*10⁵/(65*3500)

∆t = 3.5 °C

Therefore, the increase in body temperature would be 3.5 °C.

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Answer:

C

Explanation:

Cyanide's formula can be found either on google on on a reference table at the "polyatomic ions" table. Hydrogen, H, has a charge of 1+ when bonded, and cyanide has a charge of 1- overall, so they will be in a one to one ratio while bonded. As such, the equation is HCN.

The unknown chemical : Nitrogen gas : N₂

Given

1 mole of the unknown chemical

mass = 28 g

Required

The unknown chemical

Solution

A mole is a number of particles(atoms, molecules, ions)  in a substance

This refers to the atomic total of the 12 gr C-12  which is equal to 6.02.10²³, so 1 mole = 6.02.10²³ particles  

Can be formulated :

mol = mass : molecular weight

Molecular weight(MW) = mass : mol

MW=28 g : 1 mol

MW= 28 g/mol

Because this compound is diatomic, it consists of 2 elements of the same type, so this element has a mass number:

28: 2 = 14

The element having the mass number 14 is N

The ratio of effusion rates for the lightest gas H₂ to the heaviest known gas UF₆ is 13.21 to 1

Effusion is a process by which a gas escapes from its container through a tiny hole into evacuated space.

Rate of effusion ∝ 1/√Ц, (where Ц is molar mass)

Rate H₂ = 1/√ЦH₂

Rate UF₆ = 1/√ЦUF₆

Therefore, Rate H₂/ Rate UF₆ = √ЦH₂/√ЦUF₆

ЦH₂= 2.016 g/mol

ЦUF₆= 352.04 g/mol

Rate H₂ / Rate UF₆ = √352.04/√2.016 = 18.76/1.42

Rate H₂ / Rate UF₆ = 13.21

Therefore, H₂ is lower mass than UF₆. Thus H₂ gas will effuse 13 times more faster than UF₆ because the most probable speed of H₂ molecule is higher; therefore, more molecules escapes per unit time.

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