Vanadium forms a complex with F- this complex. that has a charge of -3, and in which the oxidation state of the vanadium atom is +3. Name one possible geometry for

Answer:

610 nm

Explanation:

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The value of ΔG at 25 °C for the given reaction is: ΔG = -370.4 kJ/mol + 0 = -370.4 kJ/mol So, the correct answer is -370.4 kJ/mol

To determine the value of ΔG (Gibbs free energy) at 25 °C for the given reaction:

25 (s, rhombic) + 3/2 \(O_2\)(g) → \(2SO_3\)(g)

We can use the equation:

ΔG = ΔG° + RT ln(Q)

where:

ΔG is the standard Gibbs free energy change

ΔG° is the standard Gibbs free energy change under standard conditions

R is the gas constant (8.314 J/(mol·K) or 0.008314 kJ/(mol·K))

T is the temperature in Kelvin (25 °C = 298 K)

Q is the reaction quotient, which is the ratio of the concentrations of the products to the concentrations of the reactants at a given point during the reaction.

Given that ΔG° is -370.4 kJ/mol, we can plug the values into the equation:

ΔG = -370.4 kJ/mol + (0.008314 kJ/(mol·K) * 298 K) * ln(Q)

Now, we need to determine the value of Q. Since all reactants and products are in their standard states, Q = 1, as their concentrations are taken to be 1.

ΔG = -370.4 kJ/mol + (0.008314 kJ/(mol·K) * 298 K) * ln(1)

Since ln(1) = 0, the term (0.008314 kJ/(mol·K) * 298 K) * ln(1) becomes 0.

Therefore, the value of ΔG at 25 °C for the given reaction is:

ΔG = -370.4 kJ/mol + 0 = -370.4 kJ/mol

So, the correct answer is -370.4 kJ/mol.

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Answer:

You need to add 0.243g of NaOH to raise the temperature back to 16.2°C

Explanation:

Using the equation:

Q = C*m*ΔT

Where Q is heat

C is specific heat

m is mass

and ΔT is change in temperature

We can find the heat required to increase the temperature of the solution back to 16.2°C:

Assuming specific heat of the solution of water + K2SO4 = Specific heat of water:

C = 4.184J/g°C

m = 1.56g + 6.00g = 7.56g

ΔT = 16.2°C - 7.70°C = 8.50°C

Q = 4.184J/g°C * 7.56g * 8.50°C

Q = 268.86J = 0.269kJ of heat are required

As this heat is obtained from the dissolution of NaOH:

0.269kJ * (1mol NaOH / 44.3kJ) = 0.00607 moles of NaOH are required

In grams -Molar mass NaOH: 40g/mol-:

0.00607 moles NaOH * (40g / mol) =

Answer: 0.850

Explanation: see image

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Arrow head shows the direction of products formed in a reaction. so we can say that it denotes the direction of the chemical reaction. I.e From Reactant to Product.

so, the correct choice is B

Answer:

12 moles sodium= 275.87724000000003 grams

Explanation:

1 moles sodium = 0.043497607849056.

Answer:

2.85g/cm^3

Explanation:

density = mass/volume

density=8.76g/3.07cm^3= 2.85g/cm^3

Answer:

Explanation:

The density of a substance can be found by using the formula

\(density = \frac{mass}{volume} \\ \)

From the question we have

\(density = \frac{8.76}{3.07} \\ = 2.85342019...\)

We have the final answer as

Hope this helps you

Answer:

SOIL FORMATION

Explanation:

Soils develop faster in warm, moist climates and slowest in cold or arid ones. Rainfall is one of the most important climate factors in soil formation. Organisms—Plants root, animals burrow, and bacteria eat – these and other organisms speed up the breakdown of large soil particles into smaller ones.

Answer:

The answer is

Plant also use cellular respiration

Answer:

B - Plants also use cellular respiration.

Explanation:

Did the test.

Answer:

403.2 L of O2

Explanation:

We'll begin by writing the balanced equation for the reaction. This is illustrated below:

2KClO3 —> 2KCI + 3O2

From the balanced equation above,

2 moles of KClO3 decomposed to produce 3 moles of O2.

Next, we shall determine the number of mole of O2 produced by the decomposition of 12 moles of KClO3. This can be obtained as follow:

From the balanced equation above,

2 moles of KClO3 decomposed to produce 3 moles of O2.

Therefore, 12 moles of KClO3 will decompose to produce = (12 × 3)/2 = 18 moles of O2.

Thus, 18 moles of O2 is produced.

Finally, we shall determine the volume of O2 produced from the reaction. This can be obtained as illustrated below:

Recall: 1 mole of any gas occupy 22.4 L at STP.

1 mole of O2 occupies 22.4 L at STP.

Therefore, 18 moles of O2 will occupy = 18 × 22.4 = 403.2 L at STP.

Thus, 403.2 L of O2 is produced from the reaction.

Without doing any calculations, the closest value for the average atomic mass of the element m is (a) the highest percent abundance & (d) 13.4.

The weighted average mass of the atoms that make up a naturally occurring sample of an element is what's referred to as its average atomic mass, which is also frequently referred to as its atomic weight. Unified atomic mass units (u), where 1 u is equal to precisely one-twelfth the mass of a neutral atom of carbon-12, are the standard units used to express average masses.

Since the average atomic mass of the element is close to the element with the highest percent abundance, which is close to 13.4 after doing the calculations, we got 13.815, which is close to 13.4.

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Answer:

d

Explanation:

Both changing particle size and adding a catalyst can influence the reaction rate, while adding heat specifically affects the rate by increasing the kinetic energy of the reactant particles.

The correct option are A and C.

Both changing particle size and adding a catalyst can alter the reaction rate.

Changing particle size can affect the reaction rate because it influences the surface area available for the reactant particles to interact. Smaller particle sizes result in a larger surface area, increasing the frequency of collisions between particles and accelerating the reaction. Conversely, larger particle sizes reduce the surface area, leading to fewer collision events and slower reaction rates.

Adding heat can also alter the reaction rate. Increasing the temperature provides more thermal energy to the reactant particles, causing them to move faster and collide with greater energy. This enhanced kinetic energy leads to more successful collisions and an increased reaction rate.

Adding a catalyst can significantly affect the reaction rate. A catalyst provides an alternative reaction pathway with lower activation energy, enabling the reaction to occur more easily. By lowering the energy barrier, a catalyst increases the rate of reaction without being consumed or permanently altered in the process.

The correct option are A and C.

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Answer:

D- Br

Explanation:

Answer: B

Explanation: La respuesta es b porque su electricidad y no es un ácido.

Among the following characteristics the one which is not suits for acids is  option C. because, acids cannot be neutralised by other acids and bases are required to neutralize acids.

There are many concepts defining an acid. The Bronsted -Lowry concept of acids and bases states that, acids are substances which gives protons or H + ions and bases are proton acceptors.

Lewis concept says that, acids are electron acceptors and bases are electron donors. The pH range of acids is 1 - 6 and that of base is 8 to 12 and more.

Acids changes the color of litmus to red and a base make it blue. Acids and bases reacts together called neutralization and neutralising each other forming their neutral salts. Therefore, acids cannot be neutralised with an acid itself thus, option C is incorrect.

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The english translation of your question is as follows:

Which of the following is NOT a characteristic of acids?

A-Reacts with active metals to release hydrogen.

B-They conduct electricity.

C-Reacts with acids to neutralize their properties.

D-Changes litmus blue to red.

Answer: chlorine 17Cl35 has 18 neutrons, and 17Cl37 has 20 neutrons

Explanation: 17 is the atomic number of chlorine which tells us what is the number of protons in chlorine nucleus. 35 and 37 is the mass number of two isotopes of chlorine, it tells us what is the total number of protons and neutrons in atomic nucleus of two chlorine isotopes .

Now to know how many neutrons are in both isotopes we have to substract the number of protons from the mass number of each isotope

For 17Cl35 it will be 35- 17 what makes 18 and for 17 Cl 37 it will be 20 neutrons

Explanation:

Hund's first and second rules describe how electrons are arranged in an atom's orbitals. Hund's first rule states that when electrons occupy orbitals of equal energy (such as the three p orbitals in a given shell), they will each first occupy separate orbitals before any orbital receives a second electron. This means that electrons will always try to maximize their spin, with one electron in each orbital having the same spin before any pairing occurs.

Hund's second rule states that if two or more orbitals of the same energy level are available, electrons will occupy empty orbitals before they pair up in an orbital that already has an electron.

Now, let's look at the orbital notation for sulfur. The atomic number of sulfur is 16, which means it has 16 electrons.

The orbital notation for sulfur would be:

1s² 2s² 2p⁶ 3s² 3p⁴

This indicates that sulfur has two electrons in the 1s orbital, two electrons in the 2s orbital, and six electrons in the 2p orbital, fully occupying all three 2p orbitals with two electrons in each and spinning in the same direction. Sulfur also has two electrons in the 3s orbital and four electrons in the 3p orbital, with a single electron in each of the three 3p orbitals and the fourth 3p orbital being half-filled. The half-filled 3p orbital is a consequence of Hund's rule, which predicts that electrons will fill each of the three 3p orbitals with one electron before any two orbitals receive a second electron.

Answer:

0.02392 m

Explanation:

Kilo - Hecto - Deka - Meters/Liters/Grams - Deci - Centi - Milli

23.92 mm ---> 0.02392 m

Basically move the decimal 3 units to the left.

Hope this helps and stay safe, happy, and healthy, thank you :) !!

The concentrations  Cu(NH3)42+ at equilibrium is  [Cu(NH3)42+] = 1.70 × 1013 * (0.0200M) * (0.300M)^4.

The concentrations  of Cu2+ is [Cu(NH3)42+] + [Cu2+]

The concentrations  of NH3 is 4[Cu(NH3)42+] + 4[NH3]

Equilibrium concentration is described as a state when the rate of forward reaction in a chemical reaction becomes equal to the rate of backward reaction.

The equilibrium constant expression for the formation of the complex ion Cu(NH3)42+ is:

Kf = [Cu(NH3)42+] / [Cu2+] * [NH3]^4

where [Cu(NH3)42+], [Cu2+], and [NH3] are the molar concentrations at equilibrium.

The initial concentrations of Cu2+ and NH3 are 0.0200 M and 0.300 M respectively.

We have that Kf = 1.70 × 1013, we then  rearrange the equation to solve for [Cu(NH3)42+]:

1.70 × 1013 = [Cu(NH3)42+] / (0.0200M) * (0.300M)^4

[Cu(NH3)42+] = 1.70 × 1013 * (0.0200M) * (0.300M)^4

Therefore at equilibrium, the concentration of Cu(NH3)42+ is [Cu(NH3)42+] = 1.70 × 1013 * (0.0200M) * (0.300M)^4

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Approximately 4.37 x 10^23 molecules of HCl would be required to form 34.52 g of MgCl₂.

To determine the number of molecules of HCl required to form 34.52 g of MgCl₂, we need to use the molar mass and stoichiometry of the balanced equation:

Mg(OH)₂(s) + 2 HCl(aq) → 2 H₂O(l) + MgCl₂(aq)

The molar mass of MgCl₂ is 95.21 g/mol.

First, we need to calculate the number of moles of MgCl₂ formed:

Moles of MgCl₂ = mass of MgCl₂ / molar mass of MgCl₂

Moles of MgCl₂ = 34.52 g / 95.21 g/mol

Moles of MgCl₂ = 0.363 mol

According to the balanced equation, the stoichiometric ratio between HCl and MgCl₂ is 2:1. Therefore, the moles of HCl required can be calculated as follows:

Moles of HCl = 2 * Moles of MgCl₂

Moles of HCl = 2 * 0.363 mol

Moles of HCl = 0.726 mol

To calculate the number of molecules, we need to use Avogadro's number, which is approximately 6.022 x 10^23 molecules/mol.

Number of molecules of HCl = Moles of HCl * Avogadro's number

Number of molecules of HCl = 0.726 mol * 6.022 x 10^23 molecules/mol

Number of molecules of HCl = 4.37 x 10^23 molecules

Therefore, approximately 4.37 x 10^23 molecules of HCl would be required to form 34.52 g of MgCl₂.

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Answer: organic

Explanation:

The element which can not loose electron easily and having electronagtive character is called non-metal it has following property-

1. it can not conduct heat and electricity

2. it is netiher ductile not malleable

3. it is not lsuturous and also not sonorous

Explanation:

a nonmetal (or non-metal) is a chemical element that mostly lacks the characteristics of a metal. Physically, a nonmetal tends to have a relatively low melting point, boiling point, and density. A nonmetal is typically brittle when solid and usually has poor thermal conductivity and electrical conductivity. Chemically, nonmetals tend to have relatively high ionization energy, electron affinity, and electronegativity. They gain or share electrons when they react with other elements and chemical compounds. Seventeen elements are generally classified as nonmetals: most are gases (hydrogen, helium, nitrogen, oxygen, fluorine, neon, chlorine, argon, krypton, xenon and radon); one is a liquid (bromine); and a few are solids (carbon, phosphorus, sulfur, selenium, and iodine). Metalloids such as boron, silicon, and germanium are sometimes counted as nonmetals.

Answer:

2 mL of Solution A must be added to Solution B to give a buffer that is equimolar.

Explanation:

 Given the data in the question;

First we determine the number of sodium acetate;  

⇒ molarity × volume ( L )

⇒ 0.16 × 2.0 mL

⇒ 0.16 × 0.002 L

⇒ 0.00032

Now, Molarity of sodium acetate = moles / Volume(L)

⇒ ( 0.00032 / 50 ) × 1000

⇒ 0.0064

Since number of moles of acetic acid that should be added tp make equimolar solution is 0.00032

and Molarity of acetic acid is 0.16 molL⁻¹

Let X represent the volume that should be added.

so;

Molarity = Moles / Volume (L)

we substitute

0.16 = (0.00032  / X) × 1000

0.16 = 32 / X

X = 0.32 / 0.16

X = 2 mL

Therefore, 2 mL of Solution A must be added to Solution B to give a buffer that is equimolar.

Differential rate law describes the rate of reaction as a function of reactant concentrations, changing with time. Integrated rate law describes the change in reactant concentration over time and is often used to find the half-life of a reaction.

The term "rate law" is commonly used to refer to the integrated rate law. K in a rate law is the rate constant, a value specific to each reaction that determines the rate of reaction. Orders in a rate law describe the dependency of the reaction rate on the concentration of each reactant, with each reactant having its own order. The overall reaction order is the sum of the individual orders, which can be determined through experiments.

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Which is the safest way to view a solar eclipse?

Answer: Is he B) With a telescope

Since when there is an eclipse you have to use a telescope because the other items are not correct.

I hope I've helped : )

Answer:

Br-CH2-CH(CH3)2-C(Cl)H-CH(CH3)2-CHO

Explanation:

The molecule has a total of 14 carbon atoms, 13 hydrogen atoms, and 1 bromine atom. The carbon atoms are arranged in a chain with a methyl group attached to the second carbon atom, a chlorine atom attached to the third carbon atom, and two methyl groups attached to the fourth carbon atom. The fifth carbon atom has a carbonyl group attached to it.

The molecule is an aldehyde, which means that it has a carbonyl group (C=O) at the end of the chain. The carbonyl group is polar, and the oxygen atom has a partial negative charge. The hydrogen atom has a partial positive charge. This polarity makes the aldehyde group susceptible to nucleophilic attack.

The bromine and chlorine atoms are both electrophilic, which means that they have a partial positive charge. This makes them susceptible to nucleophilic attack.

The methyl groups are non-polar and do not have any significant reactivity.

The molecule is a chiral molecule, which means that it has a mirror image that is not superimposable on itself. This is because the carbon atom with the carbonyl group is attached to four different groups.

The molecule is a liquid at room temperature and has a strong odor. It is used in a variety of products, including perfumes, flavorings, and plastics.

As per the given details, Metal D is extracted from its oxide by reduction with hydrogen, and Metal E is removed from the earth as the metal itself.

Based on the provided information, we can match the metals to the methods used to extract them as follows:

Sodium - Extracted by electrolysis of a molten ionic compound.

Magnesium - Extracted from its oxide by reduction with carbon.

Carbon - Not a metal, so it doesn't apply in this context.

Metal E - Extracted from its oxide by reduction with hydrogen.

Iron - Removed from earth as metal itself.

Hydrogen - Not a metal, so it doesn't apply in this context.

Copper - Not a metal D or E, so it doesn't apply in this context.

Matching the metals to the extraction methods:

Sodium - extracted by electrolysis of a molten ionic compound.

Magnesium - extracted from its oxide by reduction with carbon.

Metal D - extracted from its oxide by reduction with hydrogen.

Metal E - removed from earth as metal itself.

Iron - removed from earth as metal itself.

Therefore, Metal D is extracted from its oxide by reduction with hydrogen, and Metal E is removed from the earth as the metal itself.

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Answer:

1.2046*10^24 molecules

Answer:

1.506×1023 molecules

Explanation:

How many atoms and molecules of sulphur are present in 64.0 g of sulphur (S8)? ∴ 64 g of sulphur will contain=6.022×1023×64256=1.506×1023 molecules.

Answer:

Death Valley

Explanation:

Answer:

2, Death valley

Explanation: