Match the state of oxidation for ubiquinone (Q) and cytochromes , e., and as with cach mitochondrial condition Abundant NADH and Oy, but cyanide added Abundant NADH, buto, exhausted Abundant o, but NADH exhausted Abundant NADH and o,

Triphenyl stereochemistry.  methanol is the product of the Grignard reaction between methyl benzoate and excess phenylmagnesium bromide.

We will have a reduction reaction in this case. We progress from an ester group to an alcohol group. The first step is to transfer a hydride from the LiAlH4 group to the carbonyl group. The ethyl group then separates to form ethanol and an aldehyde, which continues to react with more LiAlH4. In this case, another hydride is transferred to the carbonyl group, resulting in the formation of alcohol. (See Fig.)

Triphenyl methanol is the stereochemistry product of the Grignard reaction between methyl benzoate and excess phenylmagnesium bromide.

As the carbonyl moiety is attacked, the reaction proceeds via nucleophillic reaction. There is the formation of a tetrahedral intermediate. The attack of the first molecule of PhMgBr is accompanied by the loss of the -OMe group.

Trimethyl phenoxide is produced by the attack of a second PhMgBr molecule. Protonation

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Answer:

Reducing sugars are absent

Explanation:

Benedict's solution is an substance used in testing sugars. It is mixture of sodium carbonate, sodium citrate and copper(II) sulfate pentahydrate. It can be used instead of Fehling's solution in testing for the presence of reducing sugars.

Reducing sugars contain the -CHO group. If there is no colour change after the addition of Benedict's solution, then we can conclude that reducing sugars are absent.

Silicon has three unpaired electrons in its p-orbital.

Silicon is a chemical element with the symbol Si and atomic number 14. It belongs to the group 14 of the periodic table and is a member of the carbon family. The electron configuration of silicon is 1s² 2s² 2p⁶ 3s² 3p².

In its ground state, silicon has three unpaired electrons in its p-orbital. This means that in the p-subshell of silicon, there are three electrons that are not paired with another electron. The p-orbital can hold a maximum of six electrons, with each orbital accommodating two electrons with opposite spins.

The unpaired electrons in silicon's p-orbital make it a semiconductor, which means it can conduct electricity under certain conditions. This property of silicon is crucial in the field of electronics and is the basis for the development of various electronic devices.

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Silicon has two unpaired electrons in its p-orbital.

Step 1: Identify the electronic configuration of silicon.

The atomic number of silicon is 14, which means that it has 14 electrons. The electronic configuration of silicon can be represented as 1s2 2s2 2p6 3s2 3p2.

This means that there are 2 electrons in the 1s orbital, 2 electrons in the 2s orbital, 6 electrons in the 2p orbital, 2 electrons in the 3s orbital, and 2 electrons in the 3p orbital.

Step 2: Determine the number of electrons in the p-orbital.

In silicon, there are a total of 8 electrons in the 2p and 3p orbitals combined. This is because there are 6 electrons in the 2p orbital and 2 electrons in the 3p orbital.

Since each p orbital can hold up to 2 electrons, the total number of p orbitals in silicon is 4.

Step 3: Determine the number of unpaired electrons in the p-orbital.

In a p orbital, the two electrons present are opposite in spin. This means that if there are 2 electrons in a p orbital, they will cancel each other's spin, resulting in a paired electron.

However, if there is only one electron in a p orbital, it is called an unpaired electron. Since there are four p orbitals in silicon, there can be a maximum of 8 electrons.

Since there are already 6 electrons in the 2p orbital, the remaining two electrons are in the 3p orbital. Therefore, there are only 2 unpaired electrons in the p orbital of silicon.

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Answer:

Yes they are found in same period

Answer:

alkali metals

Explanation:

Group 1A (or IA) of the periodic table are the alkali metals: hydrogen (H), lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr).

The obtained melting point range can provide information about the purity of the product and the mechanistic pathway of the reaction.

Purity of the product: A narrow melting point range suggests a high degree of purity for the product. Impurities tend to lower the melting point range and cause it to broaden. Therefore, a narrow melting point range indicates that the product is relatively pure.

Mechanistic pathway of the reaction: The melting point range alone does not provide direct information about the mechanistic pathway of the reaction. However, it can be used in conjunction with other characterization techniques to support or rule out certain mechanistic pathways. Different reaction pathways or impurities can result in different products with distinct melting points. By comparing the observed melting point range with known values for the expected product, one can gain insights into the mechanistic pathway of the reaction.

It is important to note that while the melting point range can provide useful information, it is not definitive proof of purity or mechanistic pathway. Additional characterization techniques such as spectroscopy, chromatography, or elemental analysis may be required for a more comprehensive understanding.

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heat is transferred from your hand to the ice cube

Answer:

Heat is transferred from your hand to the ice cube.

If all the hydrogen gas in the fuel tank is burned, 1.65 kg of water vapor will be produced.

The balanced chemical equation for the combustion of hydrogen gas is: 2H₂ + O₂ → 2H₂O

From this equation, we can see that two moles of hydrogen gas (H₂) react with one mole of oxygen gas (O₂) to produce two moles of water vapor (H₂O).

To determine the mass of water vapor produced, we need to use the ideal gas law to calculate the number of moles of hydrogen gas in the fuel tank:

PV = nRT

where P = 20.0 atm, V = 150.0 L, n is the number of moles, R is the gas constant (0.08206 L atm/mol K), and T = 298 K (25°C + 273.15).

Solving for n, we get:

n = PV/RT = (20.0 atm)(150.0 L)/(0.08206 L atm/mol K)(298 K) = 91.27 mol H₂

Since two moles of H₂ produce two moles of H₂O, the number of moles of water vapor produced is also 91.27 mol.

Finally, we can calculate the mass of water vapor using its molar mass (18.015 g/mol):

mass of H₂O = (91.27 mol)(18.015 g/mol)

= 1645.24 g or 1.65 kg

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Molarity

Chemists primarily need the concentration of solutions to be expressed in a way that accounts for the number of particles that react according to a particular chemical equation. Since percentage measurements are based on either mass or volume, they are generally not useful for chemical reactions. A concentration unit based on moles is preferable. The molarity (M) of a solution is the number of moles of solute dissolved in one liter of solution. To calculate the molarity of a solution, you divide the moles of solute by the volume of the solution expressed in liters.

Note that the volume is in liters of solution and not liters of solvent. When a molarity is reported, the unit is the symbol M and is read as “molar”. For example a solution labeled as 1.5 M NH 3 is read as “1.5 molar ammonia solution”.

Sample Problem: Calculating Molarity

A solution is prepared by dissolving 42.23 g of NH 4 Cl into enough water to make 500.0 mL of solution. Calculate its molarity.

Step 1: List the known quantities and plan the problem.

& underline{text{Known}} &&underline{text{Unknown}} \& text{mass}=42.23 text{g} NH_4Cl && text{molarity}= ? text{ M}\& text{molar mass} NH_4Cl=53.50 text{g} / text{mol} \& text{volume solution}=500.0 text{mL}=0.5000 text{L}

The mass of the ammonium chloride is first converted to moles. Then the molarity is calculated by dividing by liters. Note the given volume has been converted to liters.

Step 2: Solve.

42.23 text{ g } NH_4Cl times frac{1 text{ mol } NH_4Cl}{53.50 text{ g } NH_4Cl} &= 0.7893 text{ mol } NH_4Cl\frac{0.7893 text{ mol } NH_4Cl}{0.5000 text{ L}} &= 1.579 text{ M}

Step 3: Think about your result.

The molarity is 1.579 M, meaning that a liter of the solution would contain 1.579 mol NH 4 Cl. Four significant figures are appropriate.

In a laboratory situation, a chemist must frequently prepare a given volume of solutions of a known molarity. The task is to calculate the mass of the solute that is necessary. The molarity equation can be rearranged to solve for moles, which can then be converted to grams. See sample problem 16.3.

Sample Problem:

A chemist needs to prepare 3.00 L of a 0.250 M solution of potassium permanganate (KMnO 4 ). What mass of KMnO 4 does she need to make the solution?

Step 1: List the known quantities and plan the problem.

Known

molarity = 0.250 M

volume = 3.00 L

molar mass KMnO 4 = 158.04 g/mol

Unknown

mass KMnO 4 = ? g

Moles of solute is calculated by multiplying molarity by liters. Then, moles is converted to grams.

Step 2: Solve.

text{mol KMnO}_4 = 0.250 text{ M KMnO}_4 times 3.00 text{ L} &= 0.750 text{ mol KMnO}_4\0.750 text{ mol KMnO}_4 times frac{158.04 text{ g KMnO}_4}{1 text{ mol KMnO}_4} &=119 text{ g KMnO}_4

Step 3: Think about your result.

When 119 g of potassium permanganate is dissolved into water to make 3.00 L of solution, the molarity is 0.250 M.

The approximate molarity of the NH₃ solution in water, given a pH of 11.17, is around 0.1389 M.

To find the molarity, determine the pOH of the solution.

pOH = 14 - pH

pOH = 14 - 11.17

pOH ≈ 2.83

Calculate the concentration of hydroxide ions (OH-) using pOH.

OH- concentration = 10\(^(-pOH)\)

OH- concentration = 10\(^(-2.83)\)

OH- concentration ≈ 5.0 x 10\(^(-3)\) M

Use the ionization constant equation for ammonia (NH₃) to find Kb.

pKb = -log(Kb)

4.74 = -log(Kb)

Calculate Kb by taking the antilog of pKb.

Kb = 10\(^(-pKb)\)

Kb ≈ 1.8 x 10\(^(-5)\)

Set up the equilibrium equation for the reaction between NH₃ and water.

NH₃ + H2O ⇌ NH₄+ + OH-

Write the expression for the base dissociation constant (Kb) using the concentrations of NH₄+ and OH-.

Kb = [NH₄+][OH-] / [NH₃]

Assume that the initial concentration of NH₃ is equal to the concentration of NH₄+.

Kb = [OH-]² / [NH₃]

Substitute the known values into the equation.

1.8 x 10^(-5) = (5.0 x 10\(^(-3)\))² / [NH₃]

Rearrange the equation to solve for [NH₃].

[NH₃] = (5.0 x 10\(^(-3\)))² / (1.8 x 10\(^(-5)\))

[NH₃] ≈ 0.1389 M

Therefore, the molarity of the aqueous NH₃ solution with a pH of 11.17 is approximately 0.1389 M.

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The statement “the yeast engages in photosynthesis, which produces oxygen gas” is incorrect. Yeast cells do not engage in photosynthesis to produce oxygen gas.

Photosynthesis is the process by which green plants use sunlight, carbon dioxide, and water to produce glucose (a simple sugar), which serves as food for the plant.

Oxygen is also produced during photosynthesis.Yeast:Yeast is a unicellular fungus that converts sugar into carbon dioxide and alcohol. Yeast cells respire aerobically in the presence of oxygen and anaerobically in the absence of oxygen.

However, yeast cells do not perform photosynthesis. They do not have chloroplasts or pigments that are required for photosynthesis. Therefore, yeast cells cannot produce oxygen gas.Bio quizlet:Quizlet is an online learning platform that allows users to create and share flashcards, study guides, and quizzes.

It is a great resource for studying biology and other subjects. Students can create their own study materials or use existing ones created by other users. Quizlet provides an engaging and interactive way to learn and retain information.

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A pseudoscience, different of actual science, does not use the scientific method:

The problem with pseudoscience comes at the point 4, as you can't perform experiments to test your hypothesis.

1) Another discipline that could be considered a pseudoscience is, for example, numerology or tarot.

Where both try to explain in some way something, but in neither we can actually perform an experiment to test how true these are.

2) The peer-review is important, as humans are social animals. The opinion of our peers are really important for us, and this also applies for science. As you can see in the last point, you eventually need to present what you found to the scientific community, so eventually, your peers will see and review what you found.

3) A question that can be answered by science is anything that can be studied with an experiment, like:

How much time do you need to boil a cup of water to vaporize it completely?

While a question that can be answered by philosophy would be something that can be studied with a survey, like:

What is the meaning of friendship?

4) Astronomers actually use giant labs, that is called observatories, these are usually located in places with a low population (particularly because these need to have low luminous contamination, so the best ubications are far away from cities). Being in places away from large human populations is really important to recycle in order to not contaminate nor affect the near biodiversity. Safety is more trivial, it is always important, think that astronomers work with really heavy things and are often really far away from the nearest hospital, so having an accident while at work can be really problematic, so they need to take all the safety precautions they can.

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Answer:

1.  Another example of pseudoscience could be numerology. You are unable to test or create an experiment based on your hypothesis and still receive factual results.

2. Some investigations have similar or the same outcomes, this is a result of the reproducibility an experiment can prove. When scientists perform an experiment it is important that the experiment is able to be replicated. This is one of the main factors that are important to the scientific method because it proves that your first answer wasn’t a fluke.

3.  The peer-review process is quite important to the community because we often heavily rely on the opinions of others to sway our decisions and final outcomes. For science this is incredibly important, you can have your fellow scientists read over your evaluation for an experiment and make sure that it was performed correctly. Using your summary of the experiment they can also perform it again so that they are sure it was testable.

4.  For something to be answered by science it has to be testable, an example of that would be; “How many days does it take a blue, red, and white rose to die out of the earth?” A philosophical question would be answered in more of a survey; “What is the meaning of life?”

5. Astronomers have their labs far out away from cities so that the light they use is as clean as possible with little human interference. They also recycle frequently to keep the biodiversity in the area they work in continuously moving, with as little effect on the environment as possible. The risk that comes with this is they often use large heavy machinery and work with various substances so if there were to be an accident the nearest hospital would be a great distance.

Explanation:

Hope this helps have a great day!

Answer:

False

Explanation:

Everything is made of science

Answer:

13.57 approximately 14

Answer

Explanation:

Magnesium Oxide has a formula of MgO.

Magnesium has a molar mass of 24.30g/mol and Oxygen has a molar mass of 15.99g/mol.

From this, we can say we are assuming a 1 mole sample of magnesium oxide, as the stoichiometric coefficients will always be the same, as will the ratio of oxygen to magnesium.

From this,

\(15.99g/mol *1 mol MgO = 15.99 gOxygen\\24.30g/mol *1molMgO=24.30gMagnesium\\Oxygen mass percent = 15.99/(15.99+24.30) = .396\)

The Magnesium equation will be the same but a different numerator. Notice, if there were different coefficients on the elements, you would have to multiply by the stoich coefficient.

Answer:

Newton's First Law...

Explanation:

The only force that acts on the car is the sudden deceleration from v to 0 velocity in a brief period of time, due to the collision with another object. However, when viewing the total system, the collision in the situation with two cars releases twice as much energy as the collision with a wall

Explanation:

A is the answers for the question

The product formed in the combustion reaction is generally the oxidized fuel. The combustion reactions are exothermic. The products of the given reaction are CO₂ and H₂O. The correct option is D.

A  chemical reaction in which the fuel undergoes oxidation by reacting with a powerful oxidizing agent which results in the release of energy generally in the form of heat is defined as the combustion. All combustion reaction will not results in fires.

The combustion of LPG fuel which is used for cooking food involves the combustion reaction between the oxygen present in the atmosphere and the liquified petroleum gas. The explosion of fire works also indicates the combustion reaction.

The given reaction is given as:

CH₂(g) + O₂(g) → CO₂(g) + H₂O(g)

The substances on the right-hand side are called the products.

Thus the correct option is D.

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The pH of the solution is determined by the amount of acid or base present in the solution. pH is a measure of the acidity or alkalinity of a solution, with a range of values from 0 to 14. The pH of a solution is equal to the negative logarithm of the hydrogen ion concentration (H+) in the solution

The pH of a solution of 0.080 m trimethylamine and 0.13 m trimethylammonium chloride can be calculated using the following equation:

Kb = [CH3)3N][H2O] / [(CH3)3NH+][OH-]

where Kb is the base dissociation constant of trimethylamine, (CH3)3N. Using the relationship that Kw = Ka × Kb, where Ka is the acid dissociation constant of water (1.0 × 10-14 at 25 °C), the OH- ion concentration of the solution can be found to be 1.23 × 10-5 M. Then, since Kw = [H+][OH-], the H+ ion concentration is found to be 8.12 × 10-10 M. Finally, taking the negative logarithm of the H+ ion concentration gives a pH of 9.09. When a solution is introduced to water, it can either react with the water to form acid or base.

The pH of the solution is determined by the amount of acid or base present in the solution. pH is a measure of the acidity or alkalinity of a solution, with a range of values from 0 to 14. The pH of a solution is equal to the negative logarithm of the hydrogen ion concentration (H+) in the solution. The pH of the solution can be calculated using the pH formula, which is: pH = -log [H+], where [H+] is the concentration of hydrogen ions in the solution. The given solution is composed of 0.080 m trimethylamine and 0.13 m trimethylammonium chloride. Trimethylamine is a weak base and trimethylammonium chloride is its corresponding conjugate acid. When a weak base is added to water, it undergoes a reaction with water to produce hydroxide ions and a conjugate acid.

The base dissociation constant of trimethylamine, Kb is used to find the OH- ion concentration of the solution. The relationship between Kb and Ka is given by Kw = Ka × Kb, where Ka is the acid dissociation constant of water (1.0 × 10-14 at 25 °C).The OH- ion concentration of the solution can be found to be 1.23 × 10-5 M. Then, since Kw = [H+][OH-], the H+ ion concentration is found to be 8.12 × 10-10 M. Finally, taking the negative logarithm of the H+ ion concentration gives a pH of 9.09.

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Answer:

The rock on the right is foliated

Explanation:

I took the test

The total negative charge on the electrons in 1.32 mol of helium is 7.95 kc.

To find the magnitude of the total negative charge on the electrons in 1.32 mol of helium, we need to know the number of electrons in 1.32 mol. Since helium has an atomic number of 2, it means it has 2 electrons per atom. Therefore, 1.32 mol of helium contains (1.32 mol) * (\(6.022 x 10^2^3\) atoms/mol) * (2 electrons/atom) = \(1.59 x 10^2^4\) electrons.  

Each electron has a charge of \(1.6 x 10^-^1^9\) coulombs.

Multiplying the number of electrons by the charge of each electron, we get

(\(1.59 x 10^2^4\)electrons) * (\(1.6 x 10^-^1^9\) C/electron)

= \(2.54 x 10^5\) coulombs.  

To convert this into kc, we divide by 1000 to get the answer in thousands of coulombs. Therefore, the magnitude of the total negative charge on the electrons in 1.32 mol of helium is \(2.54 x 10^2\) kc, which is equivalent to 7.95 kc.

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Answer:

Electromagnetic force, Strong nuclear force, and Weak nuclear force.

Explanation:
Forces acting

electromagnetic force, strong nuclear force, and weak nuclear force. The electromagnetic force keeps the electrons attached to the atom. The strong nuclear force keeps the protons and neutrons together in the nucleus. The weak nuclear force controls how the atom decays.

The percent by mass of acetic acid in the vinegar is 2.33%.

Below are the steps to solve the given problem using the data table given below:

Step 1: Calculate the mass of the vinegar. Given,Mass of flask and vinegar solution- 25.17gMass of flask- 15.12gMass of vinegar solution = Mass of flask and vinegar solution - Mass of flask= 25.17 g - 15.12 g= 10.05 g

Step 2: Calculate the moles of NaOH used in the titration.Molarity of NaOH solution is 0.1 M.Moles of NaOH = Molarity × Volume of NaOH usedMoles of NaOH = 0.1 M × 39.00 mL (since the initial volume of NaOH is 0.00 mL)Moles of NaOH = 0.0039 moles

Step 3: Determine the moles of acetic acid used in the reaction.The balanced chemical equation for the reaction between NaOH and acetic acid (the main component of vinegar) is given below:CH3COOH + NaOH → CH3COONa + H2OMoles of NaOH = Moles of CH3COOH (since they react in a 1:1 ratio)Moles of CH3COOH = 0.0039 moles

Step 4: Calculate the mass of acetic acid used in the reaction.Molar mass of acetic acid is 60.05 g/mol.Mass of CH3COOH = Moles of CH3COOH × Molar mass of CH3COOH= 0.0039 moles × 60.05 g/mol= 0.234 gStep 5: Calculate the percent by mass of acetic acid in the vinegar.Percent by mass of acetic acid = (Mass of CH3COOH / Mass of vinegar solution) × 100%= (0.234 g / 10.05 g) × 100%= 2.33%.

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Answer:

0.028%

Explanation:

From the question given above, the following data were obtained:

Accepted value = 4.6026 g

Measured value = 4.6013 g.

Percentage error =..?

Thus, we can obtain the percentage error in the student's reading as follow:

Percentage error = |measured value – accepted value|/accepted value × 100

Percentage error = |4.6013 – 4.6026| / 4.6026 × 100

Percentage error = 0.0013 / 4.6026 × 100

Percentage error = 0.13/4.6026

Percentage error = 0.028%

Therefore, the percentage error in the student's reading is 0.028%

The substance with the highest melting point among the given choices should be CO.

The melting point of a substance depends on its intermolecular forces, which are the forces that hold its molecules together. Generally, the stronger the intermolecular forces, the higher the melting point of the substance.

Among the given choices, CO has both London dispersion forces and dipole-dipole interactions, while Ne, N2, and Xe only have London dispersion forces. Dipole-dipole interactions are generally stronger than London dispersion forces.

Therefore, CO should have the highest melting point among the given substances because it has stronger intermolecular forces than the other covalent molecules.

In summary, the substance with the highest melting point among the given choices should be CO.

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Answer:

20

Explanation:

no explanation cos no questions

Answer:

Hahahhaaahhahqhq jajajajq

Explanation:

I have no idea what your question is but it is funny so I will laugh

Answer:

the solvent is collected as it is boiled off.

Explanation

A solvent can be separated from a solute by distillation when the solvent is collected as it is boil.

When we heat up the solution so that liquid with the lowest boiling point evaporates first and collected in another container whereas leaving the other solutes behind.

So we can conclude that a solvent can be separated from a solute by distillation when the solvent is collected as it is boil.

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