what are the products of the citric acid cycle (krebs cycle, tricarboxylic acid [tca] cycle)?

Answer:

Required Volume is 22.47ml

Explanation:

To make 2.0L of 0.2M sulfuric acid required moles = 0.2 x 2 = 0.4 moles

To get 0.4 from 17.8M required quantity = 1000/17.8 x 0.4 = 22.47ml

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What quantity of energy is released when 506 g of liquid water freezes?

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= 169 kJ

As a result, we would anticipate 487.49 grams of Calcium sulfate to result from a reaction between 200 grams of Iron and Calcium sulfate.

Number-wise, the mass of one mole (or formula unit) in atomic mass units is equal to the mass of one mole (or formula unit) in grams. One mole of Oxygen molecules, for instance, weighs 32.00 g and a single Oxygen molecule, 32.00 u.

We can use the following chemical equation, assuming you meant to inquire about the interaction between Iron and Calcium sulfate:

Iron + Calcium sulfate → Ferrous sulfate + Calcium

These numbers can be used to determine how many moles of iron there are in 200 grams:

200 g Iron × (1 mol Iron / 55.85 g Iron) = 3.58 mol Iron

We can infer that 3.58 moles of Calcium sulfate would be formed in this reaction because the stoichiometric ratio of Iron to Calcium sulfate is 1:1.

We can use the following equation to determine the mass of Calcium sulfate generated:

Mass of Calcium sulfate= number of moles of Calcium sulfate× molar mass of Calcium sulfate

Mass of Calcium sulfate = 3.58 mol Calcium sulfate × 136.14 g/mol

Mass of Calcium sulfate = 487.49 g

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Answer:

D (32.7%)

Explanation:

Answer:D (32.7%)

Explanation:

the answer is 1....true

Answer:

A compound supstence is any chemcail compond

Explanation:

The ground state electron configuration for Zn2+ can be determined by considering the electronic structure of the neutral zinc atom (Zn) and then removing two electrons to account for the +2 charge.

The neutral zinc atom has an atomic number of 30, which means it has 30 electrons. The electron configuration of a neutral zinc atom is 1s2 2s2 2p6 3s2 3p6 4s2 3d10.

To form Zn2+, two electrons are removed. Since electrons are generally removed from the highest energy levels first, the two electrons will be taken from the 4s orbital. Therefore, the ground state electron configuration for Zn2+ is 1s2 2s2 2p6 3s2 3p6 3d10.

This electron configuration reflects the fact that Zn2+ has a full d orbital (3d10), which gives it stability. Zn2+ is often found in compounds with a 2+ charge due to the loss of these two electrons.

The stable electron configuration of Zn2+ allows it to participate in various chemical reactions, including coordination complexes and enzymatic processes.

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The mass of iron(III) chloride that contains 2.35×10²³ chloride ions can be calculated using the molar mass and stoichiometry of iron(III) chloride.

To calculate the mass of iron(III) chloride, we need to use the molar mass and stoichiometry. The molar mass of iron(III) chloride (FeCl₃) can be calculated by adding the atomic masses of iron (Fe) and three times the atomic mass of chlorine (Cl). The atomic mass of iron is 55.845 g/mol, and the atomic mass of chlorine is 35.453 g/mol.

Molar mass of FeCl₃ = 55.845 g/mol + 3 * 35.453 g/mol = 162.204 g/mol

From the balanced chemical equation of iron(III) chloride, we know that each formula unit of FeCl₃ contains three chloride ions (Cl⁻). Therefore, the ratio of chloride ions to iron(III) chloride is 3:1.

Given that there are 2.35×10²³ chloride ions, we can calculate the moles of iron(III) chloride using the mole ratio:

Moles of FeCl₃ = (2.35×10²³ chloride ions) / (3 chloride ions/1 FeCl₃)

            = (2.35×10²³) / 3 moles

Finally, we can calculate the mass of iron(III) chloride using the moles and molar mass:

Mass of FeCl₃ = Moles of FeCl₃ * Molar mass of FeCl₃

Substituting the values, we can find the mass of iron(III) chloride containing 2.35×10²³ chloride ions.

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Explanation:

i am sry to lazy to write it

The strong acid and strong base has high rate constant of dissociation. The rate constant for weak acid and base for the dissociation is low, they do not easily dissociate in water. Therefore, no, acid would not remain acid  if the positions of electrons and protons were swapped.

Acid is a solution which releases H⁺ hydrogen ion when dissolved in water. Base releases hydroxide ion OH⁻ ion when dissolved in water.

pH is a measurement of amount of hydronium ion H₃O⁺ in a given sample. Strength of acidic nature is directly proportional to the concentration of hydronium ion.

On subtracting pH from 14, we get pOH which measures the concentration of hydroxide ion in a given solution. Temperature affect the pH. At room temperature pH scale is between 0 to 14. 7 is the pH of neutral solution. No, acid would not remain acid  if the positions of electrons and protons were swapped.

Therefore, no, acid would not remain acid  if the positions of electrons and protons were swapped.

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Answer: The best answer is D. The number of moles of a solute per kilogram of solvent

Explanation:

I hope this helps, whereas, the molality doesn't represent moles nor liters.

The % RSD of a 1.00 ppm standard solution prepared by pipetting 10 µL of a 1000 ppm (stock solution) will be 0.1%. The relative standard deviation (RSD) is used to compare the variability in a set of measurements to the mean of the set.

It is the ratio of the standard deviation to the mean. RSD = (standard deviation / mean) × 100. The percentage RSD for a 1.00 ppm standard solution prepared by pipetting 10 µL of a 1000 ppm (stock solution) is calculated as follows: Concentration of the stock solution = 1000 ppm

Volume of the stock solution pipetted

= 10 µL Volume of the diluted solution made

= 1000 µL (10 µL × 100)

Concentration of the diluted solution = (1000 ppm × 10 µL) / 1000 µL

= 10 ppm

Relative standard deviation (%RSD)

= (Standard deviation / Mean) × 100

= (0.01 / 10) × 100 = 0.1%.

Hence, the % RSD of a 1.00 ppm standard solution prepared by pipetting 10 µL of a 1000 ppm (stock solution) is 0.1%.

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Excessive burning of fossil fuels such as coal, oil, and natural gas can have a significant impact on our planet. The primary way in which burning fossil fuels affects the planet is through the release of greenhouse gases, such as carbon dioxide (CO2) into the atmosphere.

These gases trap heat from the sun, which causes the Earth's temperature to rise, a phenomenon known as global warming. This can lead to a variety of negative effects, such as:

Climate change: The increase in temperature can cause more frequent and severe weather events such as heat waves, droughts, and floods. It can also cause sea levels to rise and glaciers to melt, leading to coastal flooding and changes in precipitation patterns.

Loss of biodiversity: Warmer temperatures can cause species to migrate or die out, leading to a loss of biodiversity. Changes in precipitation patterns can also affect the survival of certain species.

Ocean acidification: The ocean absorbs a large amount of CO2, which can cause the pH of seawater to decrease, making it more acidic. This can harm marine life, especially those that have shells or skeletons made of calcium carbonates, such as coral and certain types of plankton.

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Answer:

Dalton's 5 postulates

All matter consists of indivisible particles called atoms.

Atoms of the same element are similar in shape and mass, but differ from the atoms of other elements.

Atoms cannot be created or destroyed.

Atoms of different elements may combine with each other in a fixed, simple, whole number ratios to form compound atoms.

Explanation:

Answer:

106.5 J, and it was lost.

Explanation:

To calculate the amount of heat transferred, we can use the following formula:

Q = m * c * ΔT

where Q is the amount of heat transferred, m is the mass of the substance, c is the specific heat capacity of the substance, and ΔT is the change in temperature.

For graphite, the specific heat capacity is approximately 0.71 J/g°C.

So we have:

Q = 15.0 g * 0.71 J/g°C * (-10°C)

Q = -106.5 J

The negative sign of the answer indicates that the graphite lost heat, since its temperature decreased. Therefore, the heat was transferred from the graphite to its surroundings.

So the amount of heat transferred from the graphite was 106.5 J, and it was lost.

The conditions that must be met for the substance or matter to have all 6 phases of changes at once are approximately;

Assume that the point referenced above is called point X, where the

lines cross, it is to be noted that this is the triple point, the the only temperature and pressure combination at which all three phases (solid, liquid, and gas) are in equilibrium and may thus exist concurrently.

If the above condition is achieved, the substance will either melt of freeze at 100 degrees centigrade. This is labelled point Y on the attached image.

The phase change that the substance will undergo is condensation, as the substance moves from a gas to a liquid.

Condensation is the transformation of water vapor into liquid. It is the inverse of evaporation, in which liquid water turns into a vapor.

Condensation occurs in one of two ways: the air is either chilled to its dew point or gets so saturated with water vapor that it cannot retain any more water.

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The standard enthalpy of reaction of the given reaction is -865.71 kJ per mole of N₂H₃CH₃.

The standard molar enthalpy of formation of a compound is defined as the enthalpy of formation of 1.0 mol of the pure compound in its stable state from the pure elements in their stable states at P = 1.0 bar at a constant temperature.

Let's consider the following equation.

4 N₂H₃CH₃(l) + 5 N₂O₄(l) → 12 H₂O(g) + 9 N₂(g) + 4 CO(g)

We can calculate the standard enthalpy of the reaction using the following expression.

ΔH° = Σnp × ΔH°f(p) - Σnr × ΔH°f(r)

where,

ΔH° = 12 mol × ΔH°f(H₂O(g)) + 9 mol × ΔH°f(N₂(g)) + 4 mol × ΔH°f(CO(g)) - 4 mol × ΔH°f(N₂H₃CH₃(l)) - 5 mol × ΔH°f(N₂O₄(l))

ΔH° = 12 mol × (-241.81 kJ/mol) + 9 mol × (0 kJ/mol) + 4 mol × (-110.53 kJ/mol) - 4 mol × (54.20 kJ/mol) - 5 mol × (-19.56 kJ/mol)

ΔH° = -3462.84 kJ

In the balanced equation, there are 4 moles of N₂H₃CH₃. The standard enthalpy of reaction per mole of N₂H₃CH₃ is:

-3462.84 kJ / 4 mol = -865.71 kJ/mol

The standard enthalpy of reaction of the given reaction is -865.71 kJ per mole of N₂H₃CH₃.

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To solve this questions we need to know the heterocyclic compounds and little bit about resonance. Therefore the nitrogen which is labelled 2 will react first with acid.

Heterocyclic compounds are those cyclic organic compounds that contains hetero atoms in place of carbon like N,S and O.

Pyrazole contains has structure just like pyrrole the Nitrogen which is labelled 1 that is NH act like nitrogen of pyrrole and the nitrogen that is labelled as 2 act like nitrogen of pyridine.

The electron of NH is involved in resonance, it is not free to give its electron to hydrogen ion from acid. So the nitrogen which is like nitrogen of pyridine will take hydrogen ion from acid first.

Therefore the nitrogen which is labelled 2 will react first with acid.

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Answer:

a.

\([H _{3}O {}^{ + } ] = 4.23 \times {10}^{ - 3} M\)

b.

\([OH {}^{ - } ] = \frac{kw}{[H {}^{ + } ]} \\ [OH {}^{ - } ] = \frac{1 \times {10}^{ - 14} }{4.23 \times {10}^{ - 3} } \\ [OH {}^{ - } ] = 2.36 \times {10}^{ - 12} M\)

c.

\(pH = - log[H {}^{ + } ] \\ pH = - log(4.23 \times {10}^{ - 3} ) \\ pH = 2.37\)

d.

\(pOH = - log[OH {}^{ - } ] \\ = - log(2.36 \times {10}^{ - 12} ) \\ = 11.63\)

Answer:

Explanation:I would put argument 2, because C.jejuni is bad r

Answer: Calcium

Hope this helps

Answer:

There is 9.6 grams of CO2 produced

Explanation:

Step 1: Data given

Mass of methane = 5.50 grams

Molar mass of methane = 16.04 g/mol

Mass of oxygen = 13.9 grams

Molar mass of oxygen = 32.0 g/mol

Step 2: The reaction

CH4(g) + 2O2(g) → CO2(g) + 2H2O(g)

Step 3: Calculate number of moles

Moles = mass / molar mass

Moles methane = 5.50 grams / 16.04 g/mol

Moles methane = 0.343 moles

Moles oxygen = 13.9 grams / 32.0 g/mol

Moles oxygen = 0.434 moles

For 1 mol CH4 we need 2 moles O2 to produce 1 mol CO2 and 2 moles H2O

O2 is the limiting reactant. It will completely react (0.434 moles).

There will react 0.434/2 = 0.217 moles CH4

There will remain 0.343-0.217 = 0.126 moles CH4

There will be produced 0.434 moles of H2O and

0.434/2 =0.217 moles of CO2

Step 4: Calculate mass of products

Mass = moles * molar mass

Mass CO2 = 0.217 moles ¨44.01 g/mol

Mass CO2 = 9.6 grams

Mass H2O = 0.434 moles * 18.02

Mass H2O = 7.8 grams

Answer:

the answer is pain relievers

Which is composed of aromatic hydrocarbons?

clothing

barbeque fuel

pain relievers

polyvinyl chloride

Pain relievers are composed of aromatic hydrocarbons. Therefore, option C is correct.

Hydrocarbons with delocalized pi electrons and sigma bonds between their carbon atoms are known as aromatic hydrocarbons. One example is benzene. Since they smell, they are said to as aromatic.

One aromatic ring makes up monocyclic aromatic hydrocarbons (MAHs). The well-known environmental contaminants benzene, toluene, ethylbenzene, and xylenes are among the most combustible and water-soluble aromatic hydrocarbons (BTEX).

The typical aromatic parent structure is benzene. When the benzene ring is a substituent, it is referred to as a phenyl group.

Thus, Pain relievers are make up of aromatic hydrocarbons, option C is correct.

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Actual mass of CO recovered is 99.4g

Balance equation is : SiO2 + 3C    SiC + 2CO

Molar mass of CO is 28.01 g/mol

Moles of CO = given mass/molecular mass = 100/28.1 = 3.55mol

mass = moles of sio2 x molecular mass

Actual mass = 3.55mol of CO x 28 = 99.4g

The amount of matter that makes up an element's atom, or atomic mass. It is expressed as a multiple of 1.992646547 1023 gram, which is equal to one-twelfth of the mass of the carbon-12 atom, which has an atomic mass of 12 units. 1 atomic mass unit (amu) is equal to 1.660539040 1024 grams on this scale. An indicator of an element's atomic mass is the atomic mass unit (AMU or amu). The atomic mass unit (AMU), also called the dalton (Da) or the unified atomic mass unit (u), expresses both atomic and molecular masses. Only 1/1,836 the mass of a proton, 9.1093837015 1031 kg, is the rest mass of an electron. Therefore, compared to a proton or neutron, an electron is thought to be almost massless, and the electron mass

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Answer:

why would you do that...

19.927 moles are in 1.20 times \(10^{25}\) atoms of phosphorus.

A mole is defined as 6.02214076 ×\(10^{23}\) of some chemical unit, be it atoms, molecules, ions, or others.

1 mole of any substance contain Avogadro's number of molecules so we can calculate the number of moles by dividing the provided number of atoms over Avogadro's number to obtain the number of moles .

Moles= \(\frac{Atoms}{\;Avogadro's \;number }\)

Moles=  1.20 X \(10^{25}\) atoms ÷ 6.022 X \(10^{23}\)

= 19.927

Hence, 19.927 moles are in 1.20 times \(10^{25}\) atoms of phosphorus.

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Answer:

C

Explanation:

Melting point, temperature at which the solid and liquid forms of a pure substance can exist in equilibrium. As heat is applied to a solid, its temperature will increase until the melting point is reached. More heat then will convert the solid into a liquid with no temperature change.