For a certain chemical reaction, the equilibrium constant K - 9.4x10" at 10.0 °C. Calculate the standard Gibbs free energy of reaction. Round your answer to 2 significant digits.

Given:

Sum of masses of two isotopes = 371.9087 u

Re-185 natural abudance = 37.40%

Re-187 natural abudance = 62.60%

Known:

atomic weight of Re = 186.207 u

Atomic mass of Re-185:

To find the atomic mass of Re-185, take the total mass given and subtract atomic weight.

abundance of Re-185 = 37.40% = 0.3740

(371.9087 - x) = atomic weight of Re-187 in u

To find mass of Re-187:

abundance of Re-187 = 62.60% = 0.6260

Solution:

Step 1. Multiply x times the abundance of Re-185 and multiply (371.9087 - x) times the abundance of Re-187.

Re-185: (0.3740)(x) = 0.3740x

Re-187: (0.6260)(371.9087 - x) = 232.8148462 - 0.6260x

Step 2. Add the results and set them equal to 186.207.

0.3740x + 232.8148462 - 0.6260x = 186.207

Step 3. Solve for x by subtracting 232.8148462 from both sides and then divide both sides by -0.2520.

0.3740x + 232.8148462 - 0.6260x - 232.8148462 = 186.207 -

232.8148462

0.3740x - 0.6260x = -46.6078462

-0.2520x = -46.6078462

-0.2520x/-0.2520x = -46.6078462/-0.2520

x = 184.9517706 u

Step 4. Atomic weights of Re-185 and Re-187.

x = 185.0 u = the atomic weight of Re-185

(371.9087 - 184.9517706) = 186.9569294 = 187.0 u = the atomic weight of Re-187

Therefore the atomic weight of Re-185 is 185.0 u, and the atomic weight of Re-187 is 187.0 u.

The atomic number of fluorine is 9.

The charge number of an atomic nucleus is known as the atomic number or nuclear charge number of a chemical element. It will be is equal to the proton number of every atom of that element, for ordinary nuclei. Atomic number helps to getting information of elements with the aid of periodic table.

Atomic number = count of proton

It is known that the atomic number of fluorine is 9 . therefore, the answer will be atomic number.

To know more about atomic number.

https://brainly.com/question/16858932.

#SPJ2

Answer:

B

Explanation:

I think its water desposits clay in thick , flat layers because the way how a clay feels.

In the kinetic-molecular theory of gases, at high temperatures, particles of a gas tend to move faster and collisions between them are more frequent and energetic.

This is because at higher temperatures, the kinetic energy of the gas particles increases, causing them to move faster and collide more frequently. Additionally, as the temperature increases, the average distance between gas particles increases, allowing them to move more freely and collide with less resistance.

These collisions are also more energetic, as the increased kinetic energy of the particles results in greater force upon impact. Overall, the behavior of gas particles at high temperatures is characterized by increased movement and more frequent and energetic collisions.

To know more about kinetic-molecular theory, refer

https://brainly.com/question/134712

#SPJ11

Micas is the mineral group that exhibits a sheet-like silicate structure.

Micas are a silicate mineral group distinguished by the ability of individual mica crystals to be easily split into extremely thin elastic plates. This is referred to as perfect basal cleavage.

Mica is common in igneous and metamorphic rock, and it can also be found in sedimentary rock as small flakes. Many granites, pegmatites, and schists have "books" (large individual crystals) of mica several feet across.

Micas are used in drywall, paints, fillers, especially in automotive parts, roofing and shingles, and electronics. The mineral is used to add "shimmer" or "frost" to cosmetics and foods.

Learn more about Micas

https://brainly.com/question/24144001

#SPJ4

From the atomic mass of Sb, 121.76 u, one can conclude that the element antimony has more of isotope Antimony-123.

Explanation:

Antimony is an element that has two stable isotopes:

antimony-121 and antimony-123 with masses of 120.90 u and 122.90 u, respectively. The atomic mass of Sb, 121.76 u, can be used to conclude that antimony has a greater percentage of antimony-123 than antimony-121.

Let's calculate the percentage of antimony-121 and antimony-123 in antimony as follows:

Suppose x is the percentage of antimony-121, and (100 - x) is the percentage of antimony-123 in antimony.

At this point, we can use the average atomic mass of antimony and mass of antimony-121 and antimony-123 to calculate x as follows:

x = ((121.76 u) - (122.90 u) (100 - x)) / (120.90 u - 122.90 u) = (121.76 u - 122.90 u + 122.90 x) / (-2.00 u) = (122.90 x - 1.14 u)  

/-2.00 u Solving for x gives x = 42.7%

Therefore, we can conclude that antimony has more of isotope Antimony-123.

To know more about antimony, refer here:

https://brainly.com/question/24201366#

#SPJ11

'An increase in the riskiness of corporate bonds will increase the yield on corporate bonds and reduce the yield on treasury securities, everything else held constant.

Bonds in various cases are subject to the risk of interest rate since rising rates will be resulting in falling prices and also vice-versa. Inflation procedures also have the capacity to erode the real value of a  face value of a particular bond, which is termed a particular concern for many longer debts under maturity.

Since whenever the risk-free type rate of a specific return rises, yields of the corporate bond must rise to compensate as well. When higher yields are added to increased costs, which will create even more cases of vulnerability to stumble in economic part.

Corporate bonds are offering a higher yield than many other investments of fixed income, but only for a price in terms of risk that is added. Most corporate bonds not being secured by collateral. Investors in such types of bonds must assume not only the risk of interest rate but also the main credit risk, where the chance that the corporate issuer will be defaulting on part of obligations of death.

Learn to know more about features of corporate bonds on

https://brainly.com/question/25490304

#SPJ4

Answer:

\(6.029 \times 10^{23} molecules\)

The difference in degrees Fahrenheit between the maximum expected temperatures by the end of the century between the lower and higher emissions scenarios can vary depending on various factors and assumptions.

However, in general, the lower emissions scenario is expected to result in a lower increase in global temperatures compared to the higher emissions scenario.

This means that the maximum expected temperature rise by the end of the century under the lower emissions scenario would be lower than that of the higher emissions scenario.

The specific temperature difference would depend on the specific projections and models used, but it highlights the significant impact that emissions reductions can have on mitigating future temperature increases.

To know more about global temperatures, refer here:

https://brainly.com/question/14367287#

#SPJ11

Answer:

c because it is a group of elements

Explaation:

Answer:

Explanation:

Copepods. The single eye gave them the nickname of "cyclops"

Answer:

A 15.75-g piece of iron absorbs 1086.75 joules of heat energy, and its temperature changes from 25°C to 175°C. What is the specific heat capacity of iron?

Explanation:

The amount of heat absorbed by the gold is 339.1 joules, which was calculated by the formula of specific heat capacity.

Specific heat capacity, often just called “specific heat”, is the amount of heat energy required to raise the temperature of one unit of mass of a substance by one degree Celsius (or one Kelvin).

To calculate the amount of heat absorbed by the gold, we can use the formula:

Q = m × c × ΔT

where:

Q = heat absorbed (in joules)

m = mass of the gold (in grams)

c = specific heat capacity of gold (in joules per gram per degree Celsius)

ΔT = change in temperature of the gold (in degrees Celsius)

The specific heat capacity of gold is 0.129 J/g°C.

Substituting the given values into the formula, we get:

Q = 15.5 g × 0.129 J/g°C × (177.4°C - 4.5°C)

Q = 15.5 g × 0.129 J/g°C × 172.9°C

Q = 339.1 J

Therefore, the amount of heat absorbed by the gold is 339.1 joules.

Learn more about specific heat capacity, here:

https://brainly.com/question/29766819

#SPJ3

Answ

Matt4r is all around

Explanation:

Answer:

6.02 x 10²³ pizzas

Explanation:

If one has a mole of pizzas, they will have 6.02 x 10²³ pizzas amount.

A mole of a substance is a convenient unit of quantity of particles. It can be likened to a dozen, a score and a gross.

A dozen is 12, a score is 20 and gross is 144

 A mole of a substance contains the Avogadro's number of particles.

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

So, if we have a mole of pizza, we would have 6.02 x 10²³ pizzas.

The snake would obtain approximately 10% of 450,000 calories, which is 45,000 calories. These values are estimations based on the 10% rule and assumptions about the trophic levels.

To determine the number of calories a snake would obtain and the number of calories available to the owl in an energy pyramid, we need more information about the trophic level of the snake and the owl. The energy pyramid illustrates the flow of energy through different trophic levels, with each level receiving energy from the level below. The energy transfer between trophic levels is typically around 10%, known as the 10% rule. This means that each trophic level receives approximately 10% of the energy available in the level below it. If we assume that the snake is at a higher trophic level than the plants at the base of the pyramid, it would likely receive around 10% of the energy available in the plants. Therefore, the snake would obtain approximately 10% of 450,000 calories, which is 45,000 calories.

Learn more about calories here:

https://brainly.com/question/29512629

#SPJ11

The atom that would gain electrons if lithium and chlorine were to combine chemically is chlorine. Lithium tends to lose electrons, while chlorine tends to gain electrons, so when they combine, lithium will lose an electron to chlorine, which will gain an electron. This forms an ionic compound called lithium chloride. Therefore, the correct answer is d. chlorine.

Let us discuss this in detail.

When lithium (an alkali metal) and chlorine (a halogen) combine chemically, lithium loses one electron, and chlorine gains that electron. This is because lithium has one valence electron that it readily gives up to achieve a stable electron configuration, while chlorine needs one more electron to complete its outer electron shell. As a result, chlorine gains an electron and becomes a negatively charged ion (Cl⁻), while lithium loses an electron and becomes a positively charged ion (Li⁺).

Learn more about chlorine at https://brainly.com/question/24218286

#SPJ11

In KMnO4, manganese has five unpaired electrons. This is because the electron configuration of manganese in KMnO4 is [Ar] 3d5 4s2. The five unpaired electrons are located in the 3d orbital.

These unpaired electrons are responsible for the strong oxidizing properties of KMnO4.

1. Identify the oxidation state of manganese (Mn) in KMnO4: The sum of oxidation states of all atoms in a neutral compound is zero. Oxygen has an oxidation state of -2, and potassium has an oxidation state of +1. So, Mn + 4(-2) + 1 = 0. Solving for Mn, we find the oxidation state of Mn to be +7.

2. Write the electron configuration of manganese (Mn): Mn has an atomic number of 25, so its electron configuration is [Ar] 4s² 3d⁵.

3. Determine the electron configuration of Mn in the +7 oxidation state: In the Mn⁷⁺ ion, seven electrons are removed. First, remove the two electrons from the 4s orbital, then remove the remaining five electrons from the 3d orbital. This leaves Mn⁷⁺ with an electron configuration of [Ar].

4. Count the unpaired electrons: Since all the 4s and 3d electrons have been removed in Mn⁷⁺, there are no unpaired electrons.

In conclusion, you would expect manganese (Mn) in KMnO4 to have 0 unpaired electrons

To know more about electron visit :-

https://brainly.com/question/860094

#SPJ11

When we do the respective division operation we get the following result 0.171802.

When we do the respective division operation we get the following result 0.171802. But we must adjust the significant figures taking into account the number that has less significant figures, which is 5.68.

5.68 has three significant figures. So we will adjust the significant figures of the result to three.

0.97584 / 5.8 = 0.1718 = 0.172

Answer: Element 1

Explanation:

If an element has 3 valence shells, then it must be in the third column so element 1 is the right answer. Hope this helps! :)

1) List the compounds involved in the reaction.

Lead (II) nitrate

Potassium sulfate

Lead (II) sulfate

Potassium nitrate.

2) Write the formula of every compound.

Lead (II) nitrate: Pg(NO3)2

Potassium sulfate: K2SO4

Lead (II) sulfate: PbSO4

Potassium nitrate: KNO3

3) Write the chemical equation

.

List the elements (or polyatomic ions) in the reactants.

Pb: 1

NO3: 2

K: 2

SO4: 1

List the elements (or polyatomic ions) in the products.

Pb: 1

NO3: 1

K: 1

SO4: 1

Balance K.

List the elements (or polyatomic ions) in the reactants.

Pb: 1

NO3: 2

K: 2

SO4: 1

List the elements (or polyatomic ions) in the products.

Pb: 1

NO3: 2

K: 2

SO4: 1

4) Balanced chemical equation.

.

Answer:

chlorine is more reactive than iodine

Explanation:

because as you go down a group the

non- metallic character get reduced .

Answer:

7.3

Explanation:

Answer:

it's 5

Explanation:

k(kkkkksnndjsjsj

Answer:

h=1

o=1

Explanation:

h ±o=2 that means each contains 1

Answer:

The answer is the angle made by a refracted ray with a perpendicular to the refracting surface.

Explanation:

Expression for boiling point elevation is ;

 Δ\(T_{b}\) = i × \(K_{b}\) × m

Where;

Δ\(T_{b}\) is Boiling point elevation

m is molality

i is ven't hoff factor

\(K_{b}\) is Boiling point elevation constant.

Boiling point depend upon number of ions present in electrolyte and concentration. so, ignore Boiling point elevation constant(\(K_{b}\) ) for finding boiling point.

(a).

Between NaOH and Glucose;

For Naoh; m = 0.25M

                 i  = 2

Thus, Δ\(T_{b}\)(NaOH) = m × i = 0.25 × 2 = 0.50

For Glucose; m = 0.25M

                       i = 1

Thus, Δ\(T_{b}\) (Glucose) = m × i = 0.25 × 1 = 0.25

So, Boiling point of  NaOH is Higher than Glucose.

(b).

Between NaCl and \(Cacl_{2}\);

For NaCl; m = 0.29M

                 i  = 2

Thus, Δ\(T_{b}\)(NaCl) = m × i =  0.29 × 2 = 0.58

For \(Cacl_{2}\); m = 0.24M

                i = 2.47

Thus, Δ\(T_{b}\) (\(Cacl_{2}\)) = m × i =0.24 × 2.47 = 0.59

So, Boiling point of \(Cacl_{2}\) is Higher than NaCl.

(c).

Between \(Na_{2} So_{4}\) and Glucose;

For \(Na_{2} So_{4}\); m = 0.61M

                 i  = 0.75

Thus, Δ\(T_{b}\)( \(Na_{2} So_{4}\)) = m × i =  0.61 × 0.75 = 0.4575

For \(Na_{3}Po_{4}\); m = 0.61M

                       i = 4

Thus, Δ\(T_{b}\) (\(Na_{3}Po_{4}\)) = m × i = 0.61 × 4 = 2.44

So, Boiling point of (\(Na_{3}Po_{4}\)) is Higher than \(Na_{2} So_{4}\) .

(d).

Between Glucose and Glucose;

For Naoh; m = 0.41M

                 i  = 1

Thus, Δ\(T_{b}\)(NaOH) = m × i =  0.41 × 1 = 0.41

For Glucose; m = 0.61M

                       i = 1

Thus, Δ\(T_{b}\) (Glucose) = m × i = 0.61 × 1 = 0.61

So, Boiling point of Glucose(0.61M) is Higher Glucose(0.41M)

Learn More about Boiling Point Here ; https://brainly.com/question/2153588?referrer=searchResults

#SPJ4

Answer:

Theoretical yield = 0.24 gram (Approx)

Explanation:

Given:

Butan-2-1

Molar mass(butan-2-ol) = 74.12 g/mol

Molar mass(butan-2-one) = 72.11 g/mol

Density of butan = 0.806 g/mol

Volume = 0.30 ml

Computation:

Mass of 2-butan = Density of butan × volume

Mass of 2-butan = 0.806 g/mol × 0.30 ml

Mass of 2-butan = 0.2418 g

Mass of product = Mass of 2-butan × [1 mol of butan-2-ol / 74.12] × [1 mol of butan-2-one / 1 mol of butan-2-ol] × [72.11 g/mol / 1 mol of butan-2-one]

Mass of product = 0.235 gram

Theoretical yield = 0.24 gram (Approx)

The amount of energy that is required each year for the purpose of agriculture is only about 10%.

Energy is a very important part of civilization. In the current time, energy is necessary for all kinds of productions and agriculture is not an exception.

As such, the amount of energy that is required each year for the purpose of agriculture is only about 10%.

Learn more about energy consumption:https://brainly.com/question/16025398

#SPJ1