Assign oxidation states to each atom in each of the following species.Please explain answers.1. HSO4?Express your answers as signed integers separated by commas.oxidation states of H, S, O =2. MnO4?Express your answers as

Answer:

C. “The electrons are moving easily between the nuclei of metal atoms.”

Explanation:

i got a 100 on the quiz

Answer:

True

Explanation:

Differences in water density affect vertical ocean currents (movement of surface ocean water to the bottom of the ocean and movement of deep ocean water to the surface). … Denser water tends to sink, while less dense water tends to rise.

Differences in the density of seawater cause it to move. Therefore, the given statement is true.

The substance's mass per unit of volume is known as its density (volumetric mass density or specific mass). Although the Roman letter D may also be used, the sign most frequently used for density is (the lower case Greek letter rho). Density is calculated mathematically by dividing mass by volume.

Where m represents the mass, V is the volume, and is the density. Density is sometimes roughly characterized as weight every unit volume, while this is incorrect technically; this quantity is much more precisely known as specific weight. One example of this is in the US oil and gas business. Differences in the density of seawater cause it to move.

Therefore, the given statement is true.

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Since we are given pressure and volume, this tells us that we will be using Boyle's Law.

1) List what you have and what you need.

P₁ = 101.3 kPa

V₁ = 20.0 L

P₂ = 88.4 kPa

V₂ = ?

2) Rearrange your formula and input your values.

\(P_{1}V_{1}=P_{2}V_{2}\\ V_{2}=\frac{P_{1}V_{1}}{P_{2}} \\ V_{2}=\frac{(101.3 kPa)(20.0L)}{(88.4kPa)} \\ V_{2}=22.91855204\\ \)

V₂ = 22.9 L

There really isn't much to explain. All you need to do is use the formula and rearrange it so that the variable that you want is isolated and then plug those numbers in the calculator and you have your answer.

To kinda make sure you're doing this right, using the relationship between variables will help you out. You should know that pressure and volume has an inverse relationship so when pressure goes down, you should expect your volume to go up and vice versa. This is the case since the pressure decreased from 101.3 kPa to 88.4 kPa so it makes that the volume will increase.

KI - Ionic compound, KCl -Ionic compound,

C₆H₁₂O₆ - Covalent compound, C₆H₄Cl₂ - Covalent compound,  

KNO₃ - Ionic compound, C₆H₅COOH - Covalent compound

CH₃COOH - Covalent compound, Paraffin wax - Covalent compound

HCl - Covalent compound

Ionic compounds are formed from the interaction between cation ions and anions. A cation of an atom can be described as an electropositive ion and can donate valence electrons. Similarly, anions of an atom are electronegative ions and can accept electrons.

In an ionic compound, there is a complete transfer of electrons in the formation of an ionic bond, therefore, there exists an electrostatic force of attraction between the ions that forms a strong bond.

In a covalent compound, there is the mutual sharing of electrons in the covalent bonds. The shared electrons are hard to give away as nuclei of two atoms together share the electrons and create a bond stronger.

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This is correct because each piece of wood has the same composition.

Hope it helps! Please do comment

Flux J depends directly on whether the atoms vibrate with a low or high frequency, as the interaction between the magnetic field and matter is based on this phenomenon.

The correct answer among the following is "whether the atoms vibrate with a low or high frequency".Flux density, J depends directly on whether the atoms vibrate with a high or low frequency. The response is due to the exchange of energy between neighboring electrons, which is affected by the vibrational frequency of the atoms.

The interaction between the magnetic field and the matter is the foundation of the phenomena. Magnetic flux density (B) is also commonly referred to as the magnetic field, and it is defined as the force exerted on a moving charge. When a current-carrying conductor is placed in a magnetic field, a magnetic force acts on it, causing it to move.

Magnetic flux density (B) is defined as the force per unit length per unit current (I) per unit area (A) of the conductor. Magnetic flux density is calculated in tesla (T).

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The decay of Pb by emitting a β− particle results in the production of Bi. β− decay is a process in which an atomic nucleus emits an electron (β− particle) and transforms into a different nucleus.

In the case of Pb, it undergoes β− decay to become Bi. The equation representing this decay process is:

\(\[^{210}\textrm{Pb} \rightarrow \,^{210}\textrm{Bi} + e^{-}\]\)

In this equation, the superscripts represent the mass numbers of the nuclides, while the subscripts represent their atomic numbers. Pb has a mass number of 210, and during the decay process, it emits a β− particle and transforms into Bi, which also has a mass number of 210. The emitted β− particle carries away excess energy and atomic charge to maintain the balance in the decay process.

Overall, when Pb undergoes β− decay, it transforms into Bi by emitting an electron (β− particle). This process helps stabilize the nucleus and leads to the formation of a new nuclide.

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The molar mass of the gas, given that 3.25 g of the gas occupied 2.56 L is 30.66g/mol

To obtain the molar mass of the gas, we shall first obtain the number of mole of the gas. This can be obtained as follow:

PV = nRT

0.95 × 2.56 = n × 0.0821 × 280

Divide both sides by (0.0821 × 280)

n = (0.95 × 2.56) / (0.0821 × 280)

n = 0.106 mole

Haven obtain the mole of the gas, we shall determine the molar mass of the gas as follow:

Molar mass = mass / mole

Molar mass of gas = 3.25 / 0.106

Molar mass of gas = 30.66g/mol

Thus, the molar mass of the gas is 30.66g/mol

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The presence of the ions in the HCl would make the solution to conduct electricity.

Because it separates into ions (H+ and Cl-) when hydrochloric acid is dissolved in water, HCl (hydrochloric acid) solution conducts electricity. The electric charge of the H+ and Cl- ions allows them to travel and convey current across the solution.

The dissociation constant (Ka) of HCl describes how much of the compound separates into ions depending on the concentration of the solution. A higher HCl concentration will produce more ions, which will increase conductivity.

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If some solid Ca(OH)2 is transferred into the titration flask in part 1, the calculated KSP value for Ca(OH)2 will be lower than the accepted  value.

This is because adding more solid Ca(OH)2 to the titration flask will increase the concentration of Ca(OH)2 in the solution, which will cause more of it to dissolve and react with HCl. As a result the calculated concentration on OH- ions will be higher, which would eventually lead to a higher calculated KSP value.

However, the accepted value of KSP for Ca(OH)2 is based on an experimental data and is therefore the most accurate value. The calculated value obtained through the titration may deviate from the accepted value due to experimental errors or other factors. Therefore, it is important to use accepted values as a reference point for the accuracy of experimental results.

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The ice block's original mass is 31.0312 grams.

150 g for each cup.

Ice is at 0 degrees Celsius.

mass of water Equals 200 g

10°C is the water temperature.

2 grams of ice melt

finding out

solution

We are aware of this

Aluminum has a specific heat of c = 0.900 joule/gram °C.

Water's specific heat is 4.186 joule/gram at °C.

Thus, the temperature difference in this case is dt = 10-0 = 10°C.

so, in this instance, the heat given out by the

Heat lost is calculated as follows: water mass C dt + cup mass C dt

Heat loss is equal to 150 x 0.900 + 200 x 4.186.

temperature lost: 9722 J

so

Heat lost / latent heat of fusion here equals the mass of the ice melting.

The latent heat of fusion is given here as 334.88 joule/gram.

so

ice melt mass equals 9722 / 334.88

Ice melt weighs 29.0312 grams.

Therefore, the mass of ice in this area equals the sum of the mass of ice melt and ice melt.

ice mass = 29.0312 + 2

ice's mass is 31.0312 grams.

Consequently, the ice block's original mass is 31.0312 grams.

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Answer:

COULD WE PLEASE GET THIS ANSWER?????

Explanation:

Answer:

- Rosalind Franklin

- Notting Hill, London, United Kingdom

- July 25 1920

- Rosalind Franklin made a crucial contribution to the discovery of the double helix structure of DNA, but some would say she got a raw deal. Biographer Brenda Maddox called her the "Dark Lady of DNA," based on a once disparaging reference to Franklin by one of her coworkers.

- 1953

- that today's researchers are able to use tools such as DNA sequencing and X-ray crystallography to investigate viruses such as SARS-CoV-2. Franklin's research career began in the physical sciences.

Explanation:

PLIZZ CAN YOU GIVE ME BRAINLIEST

Answer:

Mixture

Explanation:

Definition:

              An impure substance that contain two or more pure substances that retains their individual chemical characteristics.

Examples:

1.  Smoke and fog(smog)

2.  Dirt and water(mud)

3.  Sand , water and gravel(cement)

4.  Water and salt (sea water)

5.  Petroleum, hydrocarbons and fuel addictives(Gasoline)

Answer:

When baking soda is mixed with vinegar, something new is formed. The mixture quickly foams up with carbon dioxide gas. If enough vinegar is used, all of the baking soda can be made to react and disappear into the vinegar solution.

Explanation:

Answer:

She found a Sedimentary rock.  

Explanation:

Rocks found on beaches are Sedimentary. (The upcoming and this sentence is pre-written and copy and pasted in every brainly question or comment I write or answer.) If this answer helped you please consider giving it brainliest. If my answer was wrong and you got marked wrong for it, I deeply apologize and hope you will forgive me, since everyone makes mistakes sometimes. If you need me to elaborate on my answer or give further explanation on it, please ask and I will do so. If you need to explain your reasoning on your work feel free to use my words- word for word- without crediting me, the answer was made for you anyways! Hope yall learn from my answer and it helps you in the future with assignments, quizzes, test’s, and more!  

- •Trix•

( Yes I know my - •Trix• thingy is not my user but it’s what I would change it to if I could but I can't, please address me as Trix while commenting or talking to me here.)

Answer:977.34

Explanation:

divide 2551 and 273 to get 3.778. then multiply 3.78 by 273 to gry 977.34.

Answer :The specific heat of aluminium tells you the amount of energy needed to increase the temperature of 1 g of aluminium by 1∘C . You can thus say that in order to increase the temperature of 1 g of aluminium by 1∘C , you need to supply it with 0.214 cal of heat.

Explanation:

Answer:

\(\boxed {\boxed {\sf 1080 \ Joules}}\)

Explanation:

We are asked to calculate the energy needed to raise the temperature of 80 grams of aluminum by 15 degrees Celsius.

We are given the mass and change in temperature, so we will use the following formula:

\(q=mc\Delta T\)

The mass is 80 grams, the change in temperature is 15 degrees Celsius, and aluminum's specific heat capacity is 0.9 Joules per gram degree Celsius.

Substitute the values into the formula.

\(q= (80 \ g)(0.9 \ J/g \textdegree C)(15 \textdegree C)\)

Multiply the first two numbers together. The units of grams will cancel out.

\(q= (80 \ g * 0.9 \ J/g \textdegree C)(15 \textdegree C)\)

\(q= (80 * 0.9 \ J/\textdegree C)(15 \textdegree C)\)

\(q= 72 \ J / \textdegree C (15 \textdegree C)\)

Multiply again. This time, the units of degrees Celsius cancel.

\(q= 72 \ J * 15\)

\(q= 1080 \ J\)

Raising the temperature of 80 grams of aluminum by 15 degrees Celsius requires 1080 Joules of energy.

Explanation:

A mole is a convenient unit of quantity of particles. It can be likened to a dozen, a gross or a score. Each of the unit is a specific number of substances

The particles are atoms, molecules, formula units, ions, electrons, protons, neutrons and so forth.

 The value of this quantity is 6.02 x 10²³ particles

b.c10²

i dont know if it is right sorry if isn't

Mass of the solid conjugate base should the student weigh out to make the buffer solution is  0.083 g.

For a buffer, buffer capacity is the pH range = pKa  1

Here among the given acid list

pKa of phosphoric acid = - log (7.52 x 10-3) = 2.12

pKa of formic acid = - log (1.77 x 10-4) = 3.75

pKa of propionic acid = - log (1.34 x 10-5) = 4.87

pKa of acetic acid = - log (1.75 x 10-5) = 4.75

Now, buffer capacity is the pH range = pKa  1

Here, pH 3 is in the range of buffer capacity of HCOOH.

Therefore, here we can conclude that formic acid (HCOOH) with pKa = 3.75, is the most suitable acid for preparing a buffer of pH 3.

To prepare the buffer with formic acid, the conjugate base that has to be used is sodium formate (HCOONa).

Final volume of the buffer = 100 mL = 0.1 L

[weak acid] = [HCOOH] = 0.1 M

pKa of HCOOH = 3.75

As per the Henderson Hasselbalch equation, pH = pKa + log [salt] / [acid]

Therefore, 3 = 3.75 + log [salt] / 0.1

or, 0.75 = log 0.1 / [salt]

or, 0.1 / [salt] = 5.62

or, [salt] = 0.018 M

Therefore, [HCOONa] = [salt] = 0.018 M

Moles of HCOONa in the buffer solution = 0.018 x 0.1 = 0.0018 moles

Molar mass of formic acid = 46.03 g / mol

Therefore, the mass of sodium formate (HCOONa) that has to be dissolved in the solution to prepare the buffer = 0.0018 x 46.03 = 0.083 g HCOONa

Now initial [HCOOH] provided = 2 M

Moles of HCOOH present in 0.1 L buffer solution = 0.1 x 0.1 = 0.01 moles

Moles of HCOOH present in 0.1 L buffer solution = moles of HCOOH added = 0.01 moles

Therefore, the volume of the provided stock concentration of the solution that had to be added to prepare the buffer = 0.01 / 2 = 0.005 L.

In order to prepare the buffer of pH 3;

Mass of HCOONa to be added = 0.083 g

The volume of 2 M HCOOH to be added = 0.005 L

Formic acid with pKa = 3.75, is the most suitable acid for preparing a buffer of pH 3.

To prepare the buffer with formic acid, the conjugate base that has to be used is sodium formate (HCOONa).

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As the magnitude and distance between the opposingly charged ions grow, so does the amount of electrostatic energy.

By creating interaction between two insulating materials, static electricity is produced. When the metals are rubbed together, the atoms' electrons are taken away, creating a static electric current. The potential changes as you walk away from of the charge and actually grows as you get farther away from charge, becoming ever closer to zero.

An object's electrostatic potential energy is determined by two important factors: the electric charge it carries and its proximity to other electrically charged things. The electrostatic potential is potential energy if you're referring to a collection of charged objects in space or a spread of limited electric charge densities.

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The molar concentration of a 12% sodium chloride solution is approximately 2.05 M.

To determine the molar concentration of a 12% sodium chloride solution, we need to convert the given percentage concentration into molarity.

First, we need to understand that the percentage concentration refers to the mass of the solute (sodium chloride) relative to the total mass of the solution.

In this case, a 12% sodium chloride solution means that there are 12 grams of sodium chloride in 100 grams of the solution.

To convert this into molar concentration, we need to consider the molar mass of sodium chloride, which is 58.5 g/mol.

We can start by calculating the number of moles of sodium chloride in 12 grams:

Moles of sodium chloride = mass of sodium chloride / molar mass of sodium chloride

Moles of sodium chloride = 12 g / 58.5 g/mol = 0.205 moles

Next, we calculate the volume of the solution in liters using the density of the solution. Since the density is not provided, we assume a density of 1 g/mL for simplicity:

Volume of solution = mass of solution / density

Volume of solution = 100 g / 1 g/mL = 100 mL = 0.1 L

Finally, we calculate the molar concentration (Molarity) by dividing the number of moles by the volume in liters:

Molar concentration = moles of solute / volume of solution

Molar concentration = 0.205 moles / 0.1 L = 2.05 M

Therefore, the molar concentration of a 12% sodium chloride solution is approximately 2.05 M.


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The number of moles of nitrogen gas in the cylinder is calculated by dividing the product of pressure, volume, and temperature by the ideal gas constant.

To determine the number of moles of nitrogen gas in the cylinder, we can use the ideal gas law equation:

PV = nRT

Where:

P = pressure in atmospheres

V = volume in liters

n = number of moles

R = ideal gas constant (0.0821 L·atm/(mol·K))

T = temperature in Kelvin

First, we need to convert the given pressure from inches of mercury (inHg) to atmospheres (atm). Using the conversion factor 1 inHg = 0.0334211 atm, we find:

P = 93.0 inHg * 0.0334211 atm/inHg = 3.10877 atm

Next, we need to convert the given temperature from Celsius to Kelvin. Adding 273.15 to the Celsius temperature, we have:

T = 15.00°C + 273.15 = 288.15 K

Now we can rearrange the ideal gas law equation to solve for the number of moles (n):

n = PV / RT

n = (3.10877 atm) * (9.400 L) / (0.0821 L·atm/(mol·K) * 288.15 K)

Calculating this expression will give us the number of moles of nitrogen gas in the cylinder.

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Magnesium is more reactive than zinc. Therefore, the complete displacement reaction is Mg + ZnSO4 → MgSO4 + Zn.

A displacement reaction is a type of chemical reaction in which one element displaces another element from a compound. It occurs when a more reactive element replaces a less reactive element in a compound.

These reactions typically involve metals reacting with metal salts and non-metals reacting with non-metal compounds. The more reactive element displaces the less reactive element. It leads to the formation of a new compound and a different element.

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Approximately 17.8 liters of H2 gas, measured at 745 mmHg and 87 °C, are required to synthesize 0.48 mol of CH3OH.

To determine the number of liters of H2 gas required to synthesize 0.48 mol of CH3OH, we need to use the ideal gas law equation: PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature in Kelvin.

First, we need to convert the temperature from Celsius to Kelvin by adding 273.15:

T = 87 °C + 273.15 = 360.15 K.

Next, we need to convert the pressure from mmHg to atmospheres (atm) since the ideal gas law requires pressure in atm:

P = 745 mmHg * (1 atm / 760 mmHg) = 0.979 atm.

Using the ideal gas law, we can rearrange the equation as V = (nRT) / P and plug in the values:

V = (0.48 mol * 0.0821 L·atm/(mol·K) * 360.15 K) / 0.979 atm ≈ 17.8 L.

Therefore, approximately 17.8 liters of H2 gas, measured at 745 mmHg and 87 °C, are required to synthesize 0.48 mol of CH3OH.

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The strongest acid among the given options is hydrofluoric acid (HF) with a pKa value of 3.45.

The acidity of an acid is determined by its ability to donate a proton (H+ ion) in a solution. In general, a lower pKa value indicates a stronger acid, as it corresponds to a higher concentration of dissociated protons.

Comparing the pKa values of the given acids, we can see that hydrofluoric acid (HF) has the lowest pKa value of 3.45. This indicates that HF is a stronger acid compared to the other options.

Formic acid (HCOOH) has a higher pKa value of 1.8×10^−4, which means it is less acidic than hydrofluoric acid. Oxalic acid ((COOH)2) has a pKa value of 1.23, which is lower than formic acid but still higher than hydrofluoric acid. Propanoic acid (C2H5COOH) has a higher pKa value of 1.4×10^−5 compared to the other acids, making it the weakest acid among the options.

Therefore, hydrofluoric acid (HF) is the strongest acid among the given choices based on their pKa values.

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