Which one of the following metal complex ions has three unpaired electrons?A) [Mn(H2O)6]2+ (high spin)B) [CoCl6]4?(high spin)C) [MnF6]4? (high spin)D) [Co(NH3)6]2+ (low spin)E) [Mn(en)3]2+ (low spin)

Answer:

C₂H6

Explanation:

Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). Option A

A hydrocarbon is a compound that consists of only carbon and hydrogen atoms. It is important to identify the formula that represents a hydrocarbon among the given options:

A) C₂H6: This formula represents ethane, which is a hydrocarbon. Ethane consists of two carbon atoms bonded together with single bonds and six hydrogen atoms.

B) C₂H5OH: This formula represents ethanol, which is not a hydrocarbon. Ethanol contains a hydroxyl group (-OH), indicating the presence of oxygen in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.

C) C₂H5Cl: This formula represents ethyl chloride, which is not a hydrocarbon. Ethyl chloride contains a chlorine atom (Cl) in addition to carbon and hydrogen atoms. It is a haloalkane, not a hydrocarbon.

D) C₂H6O: This formula represents ethanol, which, as mentioned before, is not a hydrocarbon. Ethanol contains an oxygen atom (O) in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.

Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). It consists only of carbon and hydrogen atoms, making it a suitable representation of a hydrocarbon.

In summary, the formula C₂H6 (option A) represents a hydrocarbon, while the other options contain additional elements (oxygen or chlorine) that make them non-hydrocarbon compounds. Option A

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The filament electron must have 69.5 keV of energy or more to remove a k shell electron.

When orbital electrons of target atoms are removed from their shell and outer shell electrons fill inner shell vacancies. To fill this vacancy, the outer shell electron releases some of its potential energy as a characteristic photon.

when filament electrons miss all the orbital electrons of the target atoms and interact with the nuclei . The attraction of the filament electron of the nucleus causes it to slow down and change direction. the resultant loss of energy is given off as a brems photon.

The shells involved and named for the shell being filled.

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The sample will degrade at a rate of 151.74 decays per minute in 1000 years and 10.24 decays per minute in 50000 years, respectively.

To calculate the decay rate of the carbon sample in Part A and Part B, we need to consider the half-life of carbon-14. The half-life of carbon-14 is approximately 5730 years.

Part A:

To find the decay rate of the sample in 1000 years, we need to determine the number of half-lives that have passed in 1000 years. We can do this by dividing the time elapsed (1000 years) by the half-life of carbon-14 (5730 years):

Number of half-lives = 1000 years / 5730 years ≈ 0.1748

Since each half-life halves the initial quantity, we can calculate the remaining fraction of the sample after 0.1748 half-lives:

Remaining fraction = (1/2)^(0.1748) ≈ 0.9391

The decay rate is given as 161.5 decays/minute, so we can calculate the decay rate of the sample in 1000 years:

Decay rate in 1000 years = Remaining fraction * Initial decay rate

= 0.9391 * 161.5 decays/minute

≈ 151.74 decays/minute

Therefore, the decay rate of the sample in 1000 years is approximately 151.74 decays/minute.

Part B:

To find the decay rate of the sample in 50000 years, we need to determine the number of half-lives that have passed in 50000 years:

Number of half-lives = 50000 years / 5730 years ≈ 8.7257

Using the same logic as in Part A, the remaining fraction after 8.7257 half-lives is:

Remaining fraction = (1/2)^(8.7257) ≈ 0.0632

Now we can calculate the decay rate in 50000 years:

Decay rate in 50000 years = Remaining fraction * Initial decay rate

= 0.0632 * 161.5 decays/minute

≈ 10.24 decays/minute

Therefore, the decay rate of the sample in 50000 years is approximately 10.24 decays/minute.

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The decreasing order of ionization energy will be Mg >Al >P>K.

Ionization energy sometimes referred to as ionization potential, would be the amount of energy it takes to eliminate an electron from a single, isolated atom or molecule.

On moving top to bottom in the periodic table, ionization energy will decrease rapidly.

Al =13 (group 3)

P =15 (group 5)

Mg =12 (group 2)

K =19 (group 1)

The decreasing order of ionization energy will be Mg >Al >P>K.

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The number of hemoglobin molecules can be calculated by multiplying the number of moles of hemoglobin by Avogadro's number (N_A), which is the number of entities (such as atoms or molecules) in one mole of a substance.

So, the number of hemoglobin molecules in the woman's blood is:

7.5 × 10^-3 mol * 6.02 x 10^23 molecules/mol = 45.15 x 10^20 molecules

To convert the number of moles of hemoglobin to grams, we can multiply the number of moles by the molar mass of hemoglobin:

7.5 × 10^-3 mol * 64,456 g/mol = 483.17 g

So, the woman has approximately 483.17 grams of hemoglobin in her blood.

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Answer:

–1

Explanation:

The electronic configuration of the neutral atom is given below:

2 8 7

From the electronic configuration of the neutral atom, we can see that the atom has 7 electrons in it's outermost shell. This implies that the element needs 1 more electron to complete it's octet configuration.

Therefore the charge on the ion of the element will be –1 indicating that the atom has received 1 electron to complete it's octet configuration.

Answer:

A because density DOES have a unit

Explanation:

Answer:

It should be A

Explanation:

I hope this helps!

Answer:

c

Explanation:

Answer:

The Answer is the last one

Explanation:

To determine the two half-reactions that will produce the largest voltage under standard conditions, we must consider the standard reduction potentials for each half-reaction.

The half-reaction with the more positive reduction potential will be the reduction half-reaction, while the half-reaction with the more negative reduction potential will be the oxidation half-reaction. This is because the reduction half-reaction is where the electrons are gained, while the oxidation half-reaction is where the electrons are lost.

Under standard conditions, the standard reduction potential for the reduction half-reaction must be higher than the standard reduction potential for the oxidation half-reaction. This creates a larger potential difference between the two half-reactions, resulting in a larger overall voltage.

In general, the half-reaction with a metal as the reactant tends to have a more negative reduction potential, while the half-reaction with a non-metal tends to have a more positive reduction potential.

Therefore, to answer the question, we must compare the standard reduction potentials for various half-reactions and select the two that have the largest potential difference. This will result in the largest voltage under standard conditions.

Overall, the selection of the two half-reactions will depend on the specific conditions of the galvanic cell, such as the type of electrodes and electrolytes used. It is important to consider the conditions carefully when selecting the appropriate half-reactions for a given galvanic cell.

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Calcium hydroxide reacts with carbon dioxide gives water and calcium carbonate. The balanced equation for the reaction is written as:

\(\rm Ca(OH)_{2} + CO_{2} \rightarrow CaCO_{3} + H_{2}O\)

Calcium carbonate is commonly called limestone. Limestone is mineral deposit found in many living and nonliving things. Rocks and shells of some organisms are major sources of calcium carbonate.

Calcium carbonate can be prepared by passing carbon dioxide through quicklime or calcium oxide CaO. Calcium carbonate will precipitate in a milky solution.

Limestone can also be prepared by the reaction of calcium hydroxide or soda lime with carbon dioxide. Each reacts in one mole and gives one mole of each product as written in the balanced reaction.

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Your question is incomplete. But your complete question probably was:

Calcium hydroxide solution and carbon dioxide gas yields solid calcium carbonate and liquid water. Write the balanced equation for this reaction.

Answer:

False, it's not an example of a resonance structure.

To produce 35.5g of H2, approximately 2055.49g of NaCl is required.

To calculate the mass of NaCl required to produce 35.5g of H2, we need to determine the stoichiometry of the reaction and use the molar mass of NaCl.

The balanced equation for the reaction is:

2NaCl + 2H2O -> 2NaOH + H2

From the balanced equation, we can see that for every 2 moles of NaCl, 1 mole of H2 is produced. We can use the molar mass of H2 (2.016g/mol) to convert the given mass of H2 into moles:

moles of H2 = mass of H2 / molar mass of H2

moles of H2 = 35.5g / 2.016g/mol

moles of H2 = 17.6 mol

Since the stoichiometry of the reaction is 2 moles of NaCl to 1 mole of H2, we can set up the following ratio:

moles of NaCl / moles of H2 = 2 / 1

Rearranging the equation to solve for moles of NaCl:

moles of NaCl = (moles of H2 * 2) / 1

moles of NaCl = (17.6 mol * 2) / 1

moles of NaCl = 35.2 mol

Now, we can calculate the mass of NaCl required using the molar mass of NaCl (58.44g/mol):

mass of NaCl = moles of NaCl * molar mass of NaCl

mass of NaCl = 35.2 mol * 58.44g/mol

mass of NaCl = 2055.49g

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Answer:

magnesium ( Mg ) - 12 neutrons and 12 protrons

neon - 10 neutrons and 10 protrons

aluminium ( Al ) - 14 neutrons and 13 protrons

Hope it helps,

Please mark me as the brainliest

Thank you

Answer:

0.001 mole of NaF.

Explanation:

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

Volume of solution = 100 mL

Molarity = 0.01 M

Mole of NaF =?

Next, we shall convert 100 mL to litre (L). This can be obtained as follow:

1000 mL = 1 L

Therefore,

100 mL = 100 mL × 1 L / 1000 ml

100 mL = 0.1 L

Thus, 100 mL is equivalent to 0.1 L.

Finally, we shall determine the number of mole of NaF present in the solution. This can be obtained as follow:

Volume of solution = 0.1 L

Molarity = 0.01 M

Mole of NaF =?

Molarity =mole /Volume

0.01 = mole of NaF / 0.1

Cross multiply

Mole of NaF = 0.01 × 0.1

Mole of NaF = 0.001 mole.

Thus, 0.001 mole of NaF is present in 100 mL of the solution.

Hops, flowers of humulus lupulus provides beer with its characteristic bitter flavor.

Hops are the flowers, or cones, of a plant called humulus lupulus. Hops help to keep beer fresher, longer; help beer retain its head of foam—a key component of a beer's aroma and flavor; and, of course, add “hoppy” aroma, flavor, and bitterness.

A hop resin called alpha acid gives beer its bitterness. The oils give certain beer styles, like pale ales, their floral, citrusy, hoppy aromas. When hops are boiled, the alpha acid undergoes some chemical changes that allows it to bitter the beer.

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The most accurate measurement for the length of an object of 15.0 m long is 15.2m. Option (B) is correct.

Accuracy is the measurement tolerance of the instrument in industrial instrumentation. It refers to the limits of the errors made when the instrument is used. Resolution is simply how fine the measuring instrument is set to read to tenths, hundreds, thousands, or whatever.

Measurement can be explained as the process of numerical evaluation of a dimension with standard measuring instruments. The elements of the measuring system involve instrumentation, calibration standards,  human operator limitations, environmental influence, and features of the workpiece.

Given, the length of the object is equal to 15 meters. After being measured with an apparatus the only lies closest to 15 m can be considered as the most accurate measurement.

Therefore, the length of 15.2 m is the most accurate measurement for the length of an object with an actual length 15 m.

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NATO is described as the international entity experiences have been driving a harmonious support activity in Kosovo - the Kosovo Power (KFOR) - since June 1999.

KFOR was laid out when NATO's 78-day air crusade against Milosevic's system was pointed towards stopping viciousness in Kosovo, was finished.

The North Atlantic Arrangement Association also known as (NATO) completed an aeronautical bombarding effort against the Government Republic of Yugoslavia during the Kosovo War.

NATO sent off an air crusade Activity Associated Power, in Walk 1999 in order to stop the compassionate disaster that was then occurring in Kosovo. The choice to intercede followed by an extended period of battling inside the territory and the disappointment of worldwide endeavors to determine the contention by discretionary means.

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Answer:

Because CO2 dissolved in water is acidic: it forms carbonic acid. The second equilibrium below strongly favors dissolved CO2

Hope it will help you

Answer:

because co2 dissolve by water

In this experiment, when the sample is completely vaporized (turned to gas), the temperature of the sample is equal to the boiling point of the substance.

The boiling point is the temperature at which a substance changes from a liquid to a gas. It is a characteristic property of a substance and is dependent on the pressure of the system. The boiling point is reached when the vapor pressure of the substance is equal to the atmospheric pressure.

At this point, the molecules of the substance have enough kinetic energy to overcome the attractive forces holding them in the liquid phase, and they are able to escape into the gas phase. This is why the temperature of the sample is equal to the boiling point when it is completely vaporized.

In summary, when the sample is completely vaporized, the temperature of the sample is equal to the boiling point of the substance.

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Answer:

A, altering the DNA of an organism at the molecular level.

(Modifying or altering genes)

Altering the DNA of an organism at the molecular level is the definition of  genetic engineering. Therefore, the correct option is option A.

Genetic engineering is the technological modification or manipulation of an organism's genes. It is also known as genetic modification as well as genetic manipulation. It is a set of instruments for modifying the genetic make-up of cells.

Artificial DNA synthesizing is employed to synthesize new DNA, whereas recombinant DNA procedures are used to extract and duplicate the genetic information of interest. This DNA is frequently introduced into the host organism using a construct.  Altering the DNA of an organism at the molecular level is the definition of  genetic engineering.

Therefore, the correct option is option A.

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The concentration of A decreases and then levels out. Option A

In many chemical reactions, a reactant is consumed as the reaction progresses, leading to a decrease in its concentration over time. The reactant molecules are transformed into products, and as the reaction proceeds, the concentration of the reactant gradually diminishes.

At equilibrium, the concentrations of both reactants and products remain relatively constant over time, although they can coexist.

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Therefore, all you have to do is subtract 14 from the negative base-10 logarithm of the concentration of H+.

Simply deduct the pH from 14 to obtain the pOH. Take the negative log of the hydroxide ion concentration to determine the pOH. Simply subtract pOH from 14 to determine the pH.

The acidity of the solution increases with the amount of [H+] ions present. The more [OH-] ions there are in the solution, the more basic it is. Water has a unique characteristic that, depending on what is dissolved, causes it to behave as either an acid or a base.

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Answer:

The ratio of the particles that make it up is fixed

Explanation:

Live as if you were to die tomorrow. ...

“That which does not kill us makes us stronger.” ...

“Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind.” ...

“We must not allow other people's limited perceptions to define us.”

C) The reaction in glycolysis that involves an aldose to ketose isomerization is option  Phosphohexose isomerase. Phosphohexose isomerase catalyzes the conversion of glucose-6-phosphate (an aldose) to fructose-6-phosphate (a ketose).

The reaction in glycolysis that involves an aldose to ketose isomerization is catalyzed by phosphohexose isomerase. This enzyme converts glucose-6-phosphate, which is an aldose sugar, into fructose-6-phosphate, which is a ketose sugar.

This is a crucial step in glycolysis as it allows for the rearrangement of the sugar molecule, facilitating further downstream metabolic processes.

The isomerization reaction occurs through the shifting of functional groups within the sugar molecule, resulting in the conversion from an aldose to a ketose.

This isomerization step ensures the proper progression of glycolysis and the generation of energy in the form of ATP.

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The mini marshmallows would extend to a height of 1.843 x 10 km above the surface of Colorado if they covered the state without any space between them.

To find the height of an Avogadro number of Marshmallows, first, we need to find the total volume of all the mini marshmallows.

Each mini marshmallow has a diameter of 0.635 cm and a height of 2.54 cm, so its volume can be calculated as:

V = πr²h

Volume = π * (0.3175 cm) * (2.54 cm)

Volume = 0.8217 cm³

Avogadro's number is 6.02 x 10²³, so the total volume of all the mini marshmallows can be calculated as:

Total volume = 6.02 x 10²³ * 0.8217 cm³

Total volume = 4.947 x 10³ cm³

Now we can use the land area of Colorado to find the height to which the mini marshmallows would extend if packed together without any space between them.

1.037 x 10⁵ mi² is equal to (1.037 x 10⁵ mi² * 2.59 x 10⁶  = 2.685 x 10¹¹ m²

If the mini marshmallows cover this area without any space between them, their height can be calculated as:

Height = total volume/area

Height = (4.947 * 10²³ cm³) / (2.685 x 10¹¹ cm²)

Height = 1.843 x 10² cm

Converting to kilometers, we get:

Height = (1.843 x 10¹ ²cm) / (100,000 cm/km)

Height = 1.843 x 10⁷ km

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