How many liters of water are required to dissolve 1.00 g of barium chromate? express your answer in liters to three significant figures?

The atomic number (Z) uniquely identifies a chemical element. In an uncharged atom, the atomic number is also equal to the number of electrons.

The atomic number, Z, should not be confused with the mass number, A, which is the number of nucleons, the total number of protons and neutrons in the nucleus of an atom.

In this video Kristine Born explains this two concepts in more detail.

Binding energy per nucleon for 5525mn is 8.95 MeV/nucleon. The nuclear binding energy for a nuclide like 55²25Mn can be found by determining the mass defect from experimental mass and calculated mass of nucleons. Multiplying the mass defect by the conversion factor of 931 MeV/amu gives the total binding energy, which when divided by the number of nucleons, yields the binding energy per nucleon.

To calculate the nuclear binding energy for 5525Mn, we need to know the experimental mass of the nuclide and use the mass defect to find the total nuclear binding energy, which can then be divided by the number of nucleons to get the binding energy per nucleon. First, please find the experimental mass of 5525Mn in atomic mass units (amu) from the provided Table or credible sources. The mass defect is the difference between the sum of the individual masses of protons and neutrons and the actual mass of the nucleus.

Once the mass defect (Δm) is determined, we multiply it by the mass-energy equivalence conversion factor of 931 MeV/amu to get the total binding energy (E) in megaelectronvolts (MeV). The formula is:

E = Δm x 931 MeV/amu

To find the binding energy per nucleon, simply divide the total binding energy by the number of nucleons (A). The formula is:

Binding energy per nucleon = E / A

For instance, if the mass defect for 5525Mn turns out to be 0.528462 amu, the total binding energy would be:

E = 0.528462 amu x 931 MeV/amu = 492 MeV

And the binding energy per nucleon would be:

Binding energy per nucleon = 492 MeV / 55 nucleons = 8.95 MeV/nucleon

Binding energy per nucleon for 5525mn is 8.95 MeV/nucleon.

Water added to khc8h4o4 has no effect on data, while water added to NaOH solution can drastically affect data.

When water is added to khc8h4o4 (potassium hydrogen phthalate), it has no effect on the data because khc8h4o4 is insoluble in water. Therefore, adding water to it does not change its mass or affect the titration process. On the other hand, when water is added to the NaOH solution, it can drastically affect the data because NaOH is a strong base that can dissolve in water and alter the concentration. Adding water to the NaOH solution increases the volume of the solution and dilutes it, leading to inaccurate data.

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Final answer:

Resonance structures differ in electron arrangement around a fixed atom layout, while structural isomers have different atom arrangements and properties, like butane and isobutane. Electron-pair geometry can differ from molecular structure based on lone electron pairs' presence.

Explanation:

The structures mentioned, where all atoms are in the same relative positions but the distribution of electrons is different, describe resonance structures. These are Lewis electron structures that showcase different arrangements of electrons around a set of atoms that do not move. In contrast, structural isomers share the same chemical formula but have different physical placement of atoms and/or chemical bonds, leading to different molecular structures and properties. An example of structural isomers are butane and isobutane (C4H10), each having unique uses due to their differing arrangements. Additionally, the difference between electron-pair geometry and molecular structure depends on whether there are lone electron pairs around the central atom in a molecule.

Correct option is c) Resonance Structures describe molecules with the same atom arrangement but different electron distributions

In chemistry, structures where all atoms are positioned the same relative to one another, but the distribution of electrons around them differs, are known as resonance strcutures.

Resonance structures have the same arrangement of atoms but show different arrangements of electrons.

These forms are different ways of representing a single molecule and are connected by a double-headed arrow, indicating that while the electron distribution may vary, the core structure remains the same.

Thus the correct option is c) resonance structures

Complete question is - Structures with all atoms in the same relative position to one another, but the distribution of electrons around them is different is referred to as a)Condensed formulas b)Skeletal formulas c) Resonance structures d) Lewis structures

Ans: 0.709 moles glycerin

The given reaction is:

14KMnO4 + 4C3H5(OH)3 → 7K2CO3 + 7Mn2O3 + 5CO2 + 16H2O

a) Based on the reaction stoichiometry:

5 moles of CO2 requires 14 moles of KMnO4

Therefore, 0.886 moles of CO2 would correspond to:

= 0.886 moles CO2 * 14 moles KMnO4/5 moles CO2

= 2.48 moles

b) Again from the reaction stoichiometry:

5 moles of CO2 requires 4 moles of glycerin

therefore, 0.886 moles of CO2 would consume:

= 0.886 moles CO2 * 4 moles glycerin/5 moles CO2

= 0.709 moles

Answer:

2.48  0.709

i got it right on edg so enjoy

Answer : The correct option is, the molar amount of the gas.

Explanation :

Ideal gas law : In this law, the pressure, temperature, volume and moles of gas are related to each other by the simple formula.

The ideal gas equation is,

[tex]PV=nRT[/tex]

where,

P = pressure of the gas

V = volume of the gas

T = temperature of the gas

n = number of moles of gas or molar amount of gas

R = Gas constant

According to the question, If the pressure, volume, and temperature of a gas are known then the molar amount of the gas  can be found by using the ideal gas law.

Hence, the correct option is, the molar amount of the gas.

We have that, given the gas law (PV=nRT), Pressure ,Volume and Temperature we find [tex]n=\frac{PV}{RT}[/tex].

The molar amount of the gas is most likely be found, given the Ideal gas law equation.

Option A.

Generally the equation for the ideal gas  is mathematically given as

PV=nRT

P=Pressure

V=Volume

n= the amount of substance of gas(the molar amount of the gas).

R=Gas constant

T=Temperature

This ideally looks at the relationship between the temperature the pressure and Volume of a gas in a system.

Therefore,From the ideal gas equation if the pressure, volume, and temperature of a gas are known, N is given as

[tex]n=\frac{PV}{RT}[/tex]

The molar amount of the gas(Number of moles).

Option A.

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We have to take some data like the energy needed for the formation of CO2, H2O, CO

We know that Go = H - TS

1kJ/mol = 238.846 cal/mol

C + 1/2O2 ------> CO                    Go1= -26700 - 20.95 T cal/mol

H2 + 1/2 O2 -------> H2O              Go2=-58900 + 13.1 T cal/mol

C + O2 ----------> CO2                 Go3= -94200 - 0.2 T cal/mol

Now the reaction gives

                     H2   + CO2 ------> H2O + CO

Now Go4 = -8600 - 7.65 T cal/mol

At T( K )= 900oC = 900 + 273 = 1173 K , Go4= -8693 +7.65 X 1173 = 373.45 cal

Go4 = -RT ln K

ln K = (-373.45/ -(1.986 X 1173))

K = e0.160 = 1.173

                 H2      +       CO2 ------>        H2O +    CO

intial mole   0.25       0.25 ------->        X   +     0.5

After reaction (0.25 -X)     (0.25-X)             X          (0.5+X)

Now calculate for X, we know that K = product / reactant

K = (0.5+ X)* X / (0.25-X ) * (0.25-X)                     now K= 1.17

So,    1.173(0.0625- 0.5X-X2) = 0.5X- X2

0.0733- 1.0865X+ 0.173X2= 0

Calculate the value of X using quadratic equation

value of X = 6.81 % =0.068

So P(H2O)= 0.068

Total pressure = P(CO) + P(CO2) + P(H2) + P(H2O)=1

Now putting the value of X in the following

P(H2) = P(CO2)= 0.25- 0.068= 0.182

P(CO) = 0.5- 0.068= 0.568

The composition of the equilibrium gas mixture in the furnace can be determined by using thermochemistry and equilibrium principles, setting up equations based on the initial gas composition and the balanced reactions, and solving for the equilibrium constants.

This is a thermochemistry and equilibrium problem in chemistry. The balanced equations for the reactions in the furnace are:
CO + H2 = CO2 + H2O
CO2 + H2 = CO + H2O
The first equation represents oxidation of carbon monoxide and the second equation represents the reduction of carbon dioxide. For a given reaction, the quantity of a product at equilibrium is determined by the Gibbs free energy, which in turn is dependent on the temperature, pressure, and initial concentrations/moles of the reactants.

In this scenario, the initial volume percentages translate into mole fractions since gases in a mixture occupy volume proportionally to their mole fractions. The equilibrium concentrations (or in this case mole fractions) of each gas can be determined by setting up an expression for each reaction's equilibrium constant (K) in terms of partial pressures and then solving the system of equations represented by the equilibrium constants and the initial quantities of gases, which are conserved.

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Answer:The alien theory is not a scientific claim because it is not based on valid data, there is no evidence to support it, and it does not come from a reliable source.

Explanation:

it was correct i did it today

We have that for the Question "what is the energy of a photon of green light with a frequency of 5.80 x 10^14/s" it can be said that the energy of a photon of green light with a frequency of 5.80 x 10^14/s is

[tex]E=3.8454*10^{-19}[/tex]

From the question we are told

what is the energy of a photon of green light with a frequency of 5.80 x 10^14/s  

Generally the equation for the energy of a photon  is mathematically given as

[tex]E=hf\\\\Therefore\\\\E=hf\\\\E=6.63*10^{-34}* 5.80 x 10^{14}\\\\[/tex]

[tex]E=3.8454*10^{-19}[/tex]

Therefore

the energy of a photon of green light with a frequency of 5.80 x 10^14/s is

[tex]E=3.8454*10^{-19}[/tex]

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If you're in K12, then the answer is "the electron releases energy".

When an electron falls to a lower energy level, the electron releases energy. Thus, the correct option for this question is B.

Electrons may be defined as the type of sub-atomic particles that are continuously revolving around the nucleus of an atom. These sub-atomic particles are typically negatively charged.

This is due to the electrostatic force between the nucleus of the atom and electrons. It leads to the centripetal force on the electrons and makes them to revolve around the nucleus.

It is a principle phenomenon that when an electron falls from a higher energy level to a lower energy level, it accelerates. This is because the energy that is stored in these sub-atomic particles now tends to be released. It also leads to the formation of electromagnetic radiations due to the differences in energy levels.

Therefore, when an electron falls to a lower energy level, the electron releases energy. Thus, the correct option for this question is B.

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Final answer:

The enantiomeric excess (ee) of a mixture containing 75% of one compound and 25% of its enantiomer is 50%, calculated using the formula [(% more abundant enantiomer - 50) × 100] / 50.

Explanation:

If a mixture contains 75% of one compound and 25% of its enantiomer, the enantiomeric excess (ee) can be calculated using the formula: ee = [(% more abundant enantiomer - 50) × 100] / 50. In this scenario, the mixture consists of 75% of one enantiomer and 25% of its counterpart. To calculate the enantiomeric excess, you subtract 50 from the percentage of the more abundant enantiomer, which is 75%, and then multiply by 100, and divide the result by 50.

Therefore, the ee = [(75-50) × 100] / 50 = [(25 × 100) / 50] = 50%. This means that the mixture has a 50% enantiomeric excess of the more abundant enantiomer.

The chemical equation for this combustion reaction is:

C8H18  +  O2  -->  CO2  +  H2O

Balancing by adding whole number coefficients:

2 C8H18  + 25 O2  -->  16 CO2  + 18 H2O

Including the phases:

2 C8H18 (l)  + 25 O2 (g)  -->  16 CO2 (g) + 18 H2O (l)

where g is gas and l is liquid

Using the principles of Hooke's Law and potential energy, we calculate the spring constant when a 61 kg cheerleader stands on the spring, causing it to compress. When a second cheerleader stands on the first, causing further compression, we can calculate their combined weight.

The subject of this question is Physics, specifically the principles of Hooke's Law and the potential energy associated with a spring. In this case, we will use Hooke's law (F = kx) to figure out the spring constant first. The Spring constant (k) can be determined by dividing the force (which is equal to the weight of the cheerleader) by the compression in the spring. Hence, when a cheerleader of 61 kg stands on the spring, her weight would exert a force equal to mass x gravity, i.e, 61 kg x 9.8 m/s² = 598.8 N. As this force causes a compression of 5.8 cm or 0.058 m in the spring, the spring constant k can be calculated by 598.8 N / 0.058 m which is approximately 10324 N/m.

When the second cheerleader stands on the shoulders of the first, the spring compresses an additional 4.2 cm (or 0.042 m). The combined force exerted on the spring is the weight of both cheerleaders. If we denote x as the unknown weight of the second cheerleader, then the new force is (61kg + x kg) * 9.8m/s². This force leads to a compression of 0.058m + 0.042m = 0.1m. By again using Hooke's law, we can say (61kg + x kg) * 9.8m/s² = 10324 N/m * 0.1 m. Solving this equation will yield the weight of the second cheerleader.

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You need 25 mL of the 1.0 M NaOH stock solution to prepare 250 mL of 0.1 M NaOH.

To calculate the volume of the 1.0 M NaOH stock solution needed to prepare 250 mL of 0.1 M NaOH, we need to apply the formula for dilution: M1V1 = M2V2. Here, M = molarity, V = volume, 1 refers to the initial condition (stock solution), and 2 refers to the final condition (prepared solution).

Applying the known values to the formula, we get:  (1.0 M) * V1 = (0.1 M) * (250 mL). Thus, V1 (volume of the stock solution needed) = 25 mL.

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Answer:

a lighthouse on a nearby island

Explanation:

The ships passengers are moving at the same velocity as the ship therefore according to their reference point the ship is not moving. The same is true with the captain and the cargo inside the hull of the ship. But from a light house , which has a different velocity as the ship, the ship is moving.

To help you understand, look at a person sat next to you in the car, does it look like that person is moving? No, because you have the same velocity as them. Now look outside at the ground, it looks like it is moving because you have different velocities.

Acetaminophen as a chemical formula of C8H9NO2. The molar masses are:

C8H9NO2 = 151.163 g/mol

C = 12 g/mol

H = 1 g/mol

N = 14 g/mol

O = 16 g/mol

TO get the mass percent, simply multiply the molar mass of each elements  with the number of the element divide by the molar mass of acetaminophen, that is:

%C = [(12 * 8) / 151.163] * 100% = 63.50%

%H = [(1 * 9) / 151.163] * 100% = 5.954%

%N = [(14 * 1) / 151.163] * 100% = 9.262%

%O = [(16 * 2) / 151.163] * 100% = 21.17% 

Answer : The correct option is, Balance.

Explanation :

Mass is measured against a standard using a balance.

Volume is measured against a standard using a graduated cylinder, burette.

The amount of heat produced or absorbed in the chemical reaction is measured against a standard using a calorimeter.

Hence, the mass is measured against a standard using a balance.

it is 4 i did this exam 3 is wrong

the answer is

D

A model

Answer:

solid liquid liquid solid

In the colloid blood, the dispersed state of matter is the blood cells and the dispersion medium is plasma. Similarly, in fruit jelly, juice is the dispersed state of matter and pectin is the dispersion medium.

In a colloid, like blood and fruit jelly, there are two parts: the dispersed state of matter and the dispersion medium. In the case of blood, the dispersed state of matter is the blood cells (both red and white blood cells) and the dispersion medium is plasma. This means that the blood cells (solid phase) are distributed throughout the plasma (liquid phase).

For fruit jelly, the dispersed state of matter is the juice and the dispersion medium is pectin. This means that the juice (liquid phase) is distributed throughout the pectin (solid phase). So, pectin acts as a stabilizing structure that holds the juice in place, even at room temperature.

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