ASAAAP HURRRY PLS!!!
Where in aerobic respiration is the largest amount of energy produced?

A)

At the beginning of the cycle, when glucose is oxidized to pyruvate.

B)

At the end of the electron transport chain, when oxygen is reduced.

C)

At the end of the electron-transport chain, when oxygen is oxidized.

D)

At the beginning of the electron transport chain, when oxygen is oxidized.

The Lewis structure of CH3CH2OH with all hydrogen atoms and non-bonding electrons included is shown below. The structure includes more than 100 atoms.

A lewis structure is a diagram that shows the bonding between atoms of a molecule and lone pairs of electrons that may exist in the molecule. It is very important to be able to create a Lewis structure since it provides information regarding the electron pair geometry and bond angles.

The Lewis dot structure for CH3CH2OH is given below: [Figure]The dots represent valence electrons (electrons in the outermost energy level). Each carbon atom has four valence electrons, and each oxygen atom has six. Hydrogen has only one electron. To draw the structure, you start by arranging the atoms and then filling in the valence electrons of each atom.The carbon atoms in ethanol are joined by a single bond.

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How to Inbox anyone here..

i am a new user.

Answer:

Just like a solid, the density of a liquid equals the mass of the liquid divided by its volume; D = m/v. The density of water is 1 gram per cubic centimeter. The density of a substance is the same regardless of the size of the sample. Summary. Students measure the volume and mass of water to determine its density.

Explanation:

Answer:

A.) produces the least amount of product.

Wavelength (L) is calculated using: L = gT²/2π, here g=9.8 m/s2 and T is wave period in seconds.

Wavelength of a wave describes how long the wave is and the distance from the "crest" (top) of one wave to the crest of next wave is called wavelength. We can also measure from the "trough" (bottom) of one wave to trough of next wave and get the same value for the wavelength.

We measure wavelength in following ways:

Use photometer to measure the energy of wave.

Convert energy into joules (J).

Divide energy by Planck's constant, 6.626 x 10⁻³⁴, to get the frequency of  wave.

Divide speed of light, ~300,000,000 m/s, by frequency to get wavelength.

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Answer:

Deduce the balanced chemical equation:

CaCO3(s) + 2HCl(aq) > CaCl2 + H2O(l) + CO2(g)

2. Write as ionic species:

Ca2+(aq) + CO3 2- (aq) + 2H+ + 2Cl- > Ca2+(aq)+ 2Cl-(aq) + H2O(l) + CO2(g)

3. Identify ions on the right that also appear on the left, and eliminate them. (As Robert Cruikshank says, these are known as ’spectator ions’ and take no overall part in the reaction):

CO3 2- (aq) + 2H+(aq) > H2O(l) + CO2(g)

This is the balanced ionic equation.

Answer:

Explanation:

Given that:

The chemical equation for the reaction is:

             Br2(g)    ⇌  2Br(g)

Initially  0.0345M  0.0416M

\(Q_C = \dfrac{[Br]^2}{[Br_2]} = \dfrac{(0.0416)^2}{(0.0345)}= 0.05016\)

\(Q_C =0.05016 >>> K_c(0.00584)\)

Thus, the given reaction will proceed in the  backward direction

 The I.C.E table is as follows:

                       Br2(g)    ⇌  2Br(g)

I               0.0345                 0.0416

C                 +x                        -2x

E             (0.0345+x)            (0.0416 -2x)

\(K_c = \dfrac{[Br]^2}{[Br_2]} = \dfrac{(0.0416-2x)^2}{(0.0345+x)} = 0.00584\)

= 0.00173056 - 0.0832x - 0.0832x + 4x² = 0.00584 (0.0345 +x)

= 0.00173056 - 0.166x + 4x² = 2.0148× 10⁻⁴ + 0.00584x

= 0.00173056 - 2.0148× 10⁻⁴ - 0.166x - 0.00584x + 4x²

= 0.00152908  - 0.17184x + 4x²

Solving by using Quadratic formula

x = 0.03038 or 0.0126

For x = 0.03038

At equilibrium

[Br₂] = (0.0345 + 0.03038) = 0.06488 M

[Br] =  (0.0416 -2(0.03038)) = - 0.01916 M

Since we have a negative value for [Br], we discard the value for x

For x = 0.0126

At equilibrium

[Br₂] = (0.0345 + 0.0126) = 0.0471 M

[Br] =  (0.0416 -2(0.0126)) = 0.0164 M

Answer:

Lithium has two naturally occurring isotopes. Lithium-6 has an atomic mass of 6.015 amu. Lithium-7 has an atomic mass of 7.016 amu. The average atomic mass of lithium is 6.941 amu.

Explanation:

Answer: PLease see answer in explanation column

Explanation:

FIRST STEP

We  find the grams ( mass ) of solute required to prepare the solution by using  the formula

grams ( mass ) of solute, g(CaCl2)= Molar mass x Molarity of the solution x Volume of the solution

Therefore Preparing 750 mL of 1.5 M calcium chloride solution, we have that Molar mass of Calcium chloride =110.98 g/mol

g(CaCl2) =110.98 g/mol X 1.5mol/L X 0.75L

g(CaCl2) =124.8525g CaCl2

SECOND STEP

Now Dissolve 124.8525g CaCl2 in about 350ml of distilled water then add more water until the final volume be comes 750ml

The periods of warming and cooling that the Earth has been through in the past are known as climate cycles or glacial-interglacial cycles.

During a warming event, we would expect the climate on Earth to be generally warmer, with a higher concentration of greenhouse gases in the atmosphere and higher sea levels due to melting ice caps. This could lead to more extreme weather patterns, including more frequent and intense heatwaves, droughts, and hurricanes.

During a cooling event, we would expect the climate on Earth to be generally colder, with lower concentrations of greenhouse gases in the atmosphere and lower sea levels due to expanding ice caps. This could lead to periods of widespread glaciation and colder temperatures, which could have significant impacts on ecosystems and human populations.

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The balanced combustion reaction for octane (C8H18) can be written as:

C8H18 + 12.5 O2 -> 8 CO2 + 9 H2O

From the balanced equation, we can see that for every 1 mole of octane (C8H18) combusted, 8 moles of carbon dioxide (CO2) are produced.

To calculate the number of grams of CO2 produced, we need to determine the number of moles of octane and then convert that to moles of CO2 using the mole ratio from the balanced equation.

First, we need to convert the volume of octane from liters to milliliters:

15.3 L = 15300 mL

Next, we can calculate the number of moles of octane using its density:

moles of octane = volume of octane (in mL) * density of octane

moles of octane = 15300 mL * 0.703 g/mL / molar mass of octane

The molar mass of octane (C8H18) can be calculated as:

molar mass of octane = (12.01 g/mol * 8) + (1.008 g/mol * 18)

Finally, we can calculate the number of moles of CO2 produced using the mole ratio:

moles of CO2 = moles of octane * (8 moles of CO2 / 1 mole of octane)

To convert moles of CO2 to grams, we can multiply the moles of CO2 by the molar mass of carbon dioxide (44.01 g/mol).

Therefore, by following these steps, you can determine the number of grams of CO2 produced from the combustion of 15.3 L of octane.

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Molarity of solution is 0.95 M.

We know that,

Molarity = number of moles/Volume (in liters)

Number of moles = Given mass /Molar Mass

Molar Mass of KI =166 g/mol

also, We are given with mass of KI = 36.50 g

Number of moles = 36.50 /166

Number of moles = 0.21 moles

Molarity = number of moles/Volume (in liters)

We are given that, Volume of the solution is 221 ml

So,

Molarity = 0.21 × 1000/221

Molarity of KI = 0.95 M

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Answer:

N/A

Explanation:

"what is the anwser to this question" Is Not Available because this no question.

Please like this.

The strong electrolytes among the given choices are HCl, HC2H3O2, and KCl.

In the given options, HCl and KCl are both ionic compounds. They contain a cation (H+ or K+) and an anion (Cl-). When these compounds dissolve in water, the ions get separated and move freely in the solution. Therefore, HCl and KCl completely dissociate into ions and are strong electrolytes.

On the other hand, HC2H3O2 (acetic acid) and NH3 (ammonia) are weak electrolytes. They partially dissociate into ions and also exist in the molecular form in the solution. Therefore, they are not strong electrolytes. In conclusion, HCl, HC2H3O2, and KCl are the strong electrolytes among the given choices.

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Answer:

The ionic bond present between CaO molecule

Explanation:

The valence states provided are general representations and may vary depending on specific conditions and coordination environments.

a. Uvarovite: The mineral formula for uvarovite is Ca3Cr2(SiO4)3. In this formula, the valence state of calcium (Ca) is +2, the valence state of chromium (Cr) is +3, and the valence state of silicon (Si) is +4. Oxygen (O) is usually assigned a valence state of -2.

b. Azurite: The mineral formula for azurite is Cu3(CO3)2(OH)2. In this formula, the valence state of copper (Cu) is +2, carbonate (CO3) has a valence state of -2, and hydroxide (OH) has a valence state of -1.

c. Cuprite: The mineral formula for cuprite is Cu2O. In this formula, the valence state of copper (Cu) is +1, and oxygen (O) is usually assigned a valence state of -2.

d. Gypsum: The mineral formula for gypsum is CaSO4·2H2O. In this formula, the valence state of calcium (Ca) is +2, sulfur (S) has a valence state of +6, and oxygen (O) is usually assigned a valence state of -2. The water molecules (H2O) do not have a net charge.

e. Galena: The mineral formula for galena is PbS. In this formula, the valence state of lead (Pb) is +2, and sulfur (S) has a valence state of -2.

It's important to note that the valence states provided are general representations and may vary depending on specific conditions and coordination environments.

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The reaction between pottasium metal and chlorine gas is an example of combination reaction and the balanced equation is as follows: 2K + Cl₂ → 2KCl

A chemical equation is a symbolic representation of a chemical reaction where reactants are represented on the left, and products on the right.

A chemical equation is said to be balanced when the number of atoms of each element on both sides of the equation are the same.

According to this question, potassium metal reacts with chlorine gas to form solid potassium chloride. The balanced equation is as follows:

2K + Cl₂ → 2KCl

Based on the above equation, pottasium combines with chlorine chemically to form pottasium chloride compound, hence, it is an example of combination reaction.

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Answer:

Non point source pollution

Explanation:

Point source pollution is when any contaminant enter the environment from an easily from an easily identified and confined place.

Non point source pollution is pollutants released in a wide space. Including oil, grease, and toxic chemicals.  

Explanation

To find the molar mass of sulfur dihydride, you will need to find the sum of all the atomic masses making up sulfur dihydride.

sulfur dihydride is H2S.

Atomic mass of H = 1,00784 u

Atomic mass of S = 32,065 u

Molar mass = (1.00784 x 2) + 32,065 = 34.081 g/mol

Answer

34.081 g/mol

In compound (4) HClO₄, the percent composition by mass of chlorine is equal to 35%.

The percentage composition of a compound provides, in terms of mass, information on the percentages of various elements that are present in the complex. A compound is created when two or more components are combined. If you are looking into a certain chemical compound, you could be interested in finding the percentage of a particular element that is included inside that chemical complex. (mass of element / molecular mass) x 100 is the equation for determining the percentage composition of a substance.

HClO₄ molecular mass = 100 g/mol

% mass composition = (35 / 100) × 100 = 35 %

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Answer:

it is dotted

Explanation:

Answer:

A

Explanation:

medal is a conductor so the heat will travl

pCO2 is an important factor that affects various aspects of water chemistry and the impacts of ocean acidification. When pCO2 increases, the concentration of total CO2 dissolved in water also increases. This leads to changes in pH, which decreases due to increasing atmospheric CO2 concentration.

When pCO2 rises, the concentration of only CO2 dissolved in water increases. The dissolved CO2 forms carbonic acid, which contributes to the acidification of the ocean. This increase in CO2 affects the equilibrium between CO2, HCO3-, and CO3^2-, shifting it towards higher levels of dissolved CO2 and H+ ions, resulting in a lower pH.

In terms of the impacts of ocean acidification on different organisms, the effects can vary depending on their specific needs. An organism that requires CO2 is likely to fare better under ocean acidification since the increase in dissolved CO2 can provide them with a favorable environment. However, organisms that rely on HCO3- or CO3^2- may fare worse under ocean acidification, as the lower pH interferes with the availability of these carbonate ions, which are essential for shell formation and calcification in some marine organisms.

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Newton's optics experiment observation and intervention. Newton made observations using the principle of light passing through prisms and the rays that were transmitted through them. It was revealed that light has a variety of properties and features.

The key experiment performed by Newton was reflecting light onto a piece of wood with a small hole drilled into it. He was able to create a pure-colored light beam in this way. He was able to demonstrate, for instance, that blue light produced solely blue light when it was refracted through a second prism.

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If the uncertainty associated with the position of an electron is 3.3 × 10−11 m, the uncertainty associated with its momentum is 3.9 × 10−25 kg ms (option C)

In the field of quantum mechanics, Heisenberg's uncertainty principle specifies that the more precisely the position of a particle is known, the less precisely its momentum can be known, and vice versa.

The principle establishes that the uncertainty in the measurements of the position and momentum of a particle are interconnected.

Thus, the uncertainty principle places a boundary on the maximum precision with which position and momentum can be identified simultaneously.

The Heisenberg's uncertainty principle is mathematically represented as follows : ∆x ∆p ≥ h / 4π

where :

∆x = Uncertainty in position of an electron

∆p = Uncertainty in the momentum of an electron

h = Planck's constant, 6.626 × 10-34 Joule sec

Using the above formula we can calculate the uncertainty associated with momentum of an electron,

∆p = h / 4π ∆x= 6.626 × 10-34 / 4 × 3.14 × 3.3 × 10-11

∆p = 3.9 × 10-25 kg ms

Therefore, the uncertainty associated with the momentum of an electron is 3.9 × 10-25 kg ms.

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In Part 1 of the question, we are asked to draw the product that results from the provided mechanism arrows. This involves analyzing the reaction steps and understanding the changes that occur during the reaction.

In Part 2, we need to determine whether the elementary step is reversible, meaning if the reaction can proceed in both the forward and reverse directions.

In Part 1, drawing the product resulting from the provided mechanism arrows requires a careful analysis of the reaction steps. The mechanism arrows indicate the movement of electrons and the formation or breaking of bonds. By following the arrows and considering the reactivity of the reactants, we can determine the resulting product(s) of the reaction. It is important to pay attention to the regioselectivity and stereochemistry of the reaction, if applicable.

In Part 2, determining whether the elementary step is reversible involves considering the nature of the reaction and the thermodynamics of the process. Reversible elementary steps involve both forward and reverse reactions occurring under certain conditions. Factors such as energy barriers, equilibrium constants, and reaction conditions influence reversibility. By analyzing these factors, we can determine whether the elementary step is reversible or if the reaction predominantly proceeds in one direction.

Overall, these two parts require a detailed understanding of the reaction mechanism, electron movement, and the factors affecting reversibility to accurately draw the product and determine the reversibility of the elementary step.

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In Part 1, draw the product that results from the mechanism arrows provided. In Part 2, indicate whether the elementary step is reversible. LCH3 4th attempt

The equilibrium concentration of NOF is 0.067 M.

To determine the equilibrium concentration of NOF, we need to use the equilibrium constant (Kc) and the initial concentrations of the reactants. The equilibrium constant expression for the given reaction is:

Kc = [NOF]² / ([NO]² * [F₂])

Given that Kc = 7.2 × 10⁻⁴ and the initial concentrations of NO and F₂ are both 0.92 M, we can substitute these values into the equilibrium constant expression:

7.2 × 10⁻⁴ = [NOF]² / (0.92)²

Rearranging the equation and solving for [NOF], we get:

[NOF]² = 7.2 × 10⁻⁴ * (0.92)²

[NOF]² = 6.386 × 10⁻⁴

[NOF] = √(6.386 × 10⁻⁴)

[NOF] ≈ 0.067 M

Therefore, the equilibrium concentration of NOF is approximately 0.067 M when the reaction starts with initial concentrations of 0.92 M for both NO and F₂.

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According to molar concentration, 0.7455 g of  KCl are needed to make 0.1 M KCl solution.

Molar concentration is defined as a measure by which concentration of chemical substances present in a solution are determined. It is defined in particular reference to solute concentration in a solution . Most commonly used unit for molar concentration is moles/liter.

Molar concentration is calculated by the formula, molar concentration=mass/ molar mass ×1/volume of solution in liters.

In terms of moles, it's formula is given as molar concentration= number of moles /volume of solution in liters.

Substituting values in 1st formula mentioned,mass=molarity×molar mass×volume in liters=0.1×74.55×0.1=0.7455 g.

Thus,0.7455 g of  KCl are needed to make 0.1 M KCl solution.

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An ionic bond is a stable bond created by the full transfer of the valence electron.

When an electron moves from one atom or molecule to another one of these chemical entities, this is known as electron transfer. When it comes to specific redox reactions involving the transfer of electrons, ET is a mechanistic description. ETRs are electrochemical processes.

ETRs are electrochemical processes. Transition metal complexes are frequently used in ET processes, which are relevant to respiration and photosynthesis. ET is a step in various commercial polymerization processes in organic chemistry. It serves as the basis for photoredox catalysis.

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