What happens when a catalyst is used in a reaction?.

The value of the equilibrium constant at 298 k is 0.9448.

the reaction is given as :

C₂H₂  +   H₂   ----->   C₂H₄

The ΔG°f at 298 K for C₂H₂ = 209 kJ/mol

the ΔG°f at 298 K for  H₂ = 0

the  ΔG°f at 298 K for  C₂H₄ = 68.4 kJ/mol

ΔG°f  = 209 - 68.4 + 0

ΔG°f  = 140.6 kJ/mol

the equilibrium constant expression is given as :

ΔG = ΔG°f + RT lnk

for equilibrium : ΔG = 0

k = e^-ΔG°f /  RT

k = e^( -140.6 / 8.314 × 298 )

k= e^(-0.0567)

k = 0.9448

Thus, the value of equilibrium constant k is 0.9448.

To learn more about equilibrium constant here

https://brainly.com/question/13423433

#SPJ4

Answer: orbitals supernumerary

Explanation:

Answer:

both S orbital and p orbitals

Explanation:

took the exam got the question right.

The correct options for A, B, C, D, E and F are true, false, false, false, true and false respectively.

A. True.

According to kinetic molecular theory, lighter gas molecules move with a higher average velocity than heavier gas molecules at a constant temperature.

B. False.

The average kinetic energy of gas molecules at a constant temperature is independent of their mass.

C. False.

A real gas performs at its most optimal when the volume of the container is relatively large and the gas molecules move relatively slowly.

D. False.

The effect of interparticle interactions on the behavior of a gas diminishes as the temperature increases.

I. True.

The number of collisions per unit area increases as more gas molecules are supplied to a container of constant volume and temperature (constant V and T).

F. False.

Kinetic molecular theory states that the pressure remains constant for a constant volume and mole of a gas.

Learn more about Kinetic molecular theory, here:

https://brainly.com/question/30655544

#SPJ1

Your question is incomplete, most probably the complete question is:

Which of the following statements is(are) true? For the false statements, correct them.

a. At constant temperature, the lighter the gas molecules, the faster the average velocity of the gas molecules.

b. At constant temperature, the heavier the gas molecules, the larger the average kinetic energy of the gas molecules.

c. A real gas behaves most ideally when the container volume is relatively large and the gas molecules are moving relatively quickly.

d. As temperature increases, the effect of inter particle interactions on gas behavior is increased.

e. At constant $V$ and $T,$ as gas molecules are added into a container, the number of collisions per unit area increases resulting in a higher pressure.

f. The kinetic molecular theory predicts that pressure is inversely proportional to temperature at constant volume and moles of gas.

Answer:

7.5mL of the stock solution

Explanation:

A stock solution is a concentrated solution that is used to make another more diluted solution.

In the problem, the RFC solution is 20% (v/v). That means contains 20mL of RFC in 100mL of solution.

Yo need to prepare 50.0mL of a 3.0% (v/v), solution (3mL of RFC in 100mL of solution). That means you need:

50.0mL solution × (3mL RFC / 100mL solution) = 1.5mL of RFC. These RFC must come from the stock solution

As your stock solution contains 20mL of RFC per 100mL of solution, you will need:

1.5mL RFC × (100mL stock / 20mL RFC) =

Answer:

167.97998

Explanation:

Answer:

It is made up of 2 elements. The elements are calcium and chlorine.

Explanation:

I just know

Answer:

The correct answer is b) 4.17 g of sodium and 6.42 g of chlorine

Explanation:

According to the law of definite proportions a chemical compound is composed always by the same elements in the same proportions by mass. In this case, the proportion of the elements by mass will be 4.37 g of chlorine (Cl) per 2.84 g of sodium (Na):

4.37 Cl/2.84 g Na= 1.54

We can calculate the proportions of the results in order to see which is the correct:

a) 3.75 g Cl/4.17 g Na = 0.899

b) 6.42 g Cl/4.17 g Na = 1.539 ⇒ ≅1.54

c) 1.05 g Cl/4.17 g Na = 3.971

d) 12.1 g Cl/4.17 g Na = 2.901

The option in which the proportion Cl/Na is equal to 1.54 is option b

Answer:

However, as ocean acidification increases, available carbonate ions (CO32-) bond with excess hydrogen, resulting in fewer carbonate ions available for calcifying organisms to build and maintain their shells, skeletons, and other calcium carbonate structures.

2.70 grammes of N₂ must dissolve in 30.5 litres of water at 25 degrees Celsius and 4.46 atm of pressure.

The solubility of N₂ in water depends on the temperature and pressure. To determine the volume of water needed to dissolve 2.70 grams of N₂ at 25 °C and 4.46 atm, we need to use the Henry's law equation, which relates the solubility of a gas in a liquid to its partial pressure:

C = kH x P

where C is the concentration of the gas in the liquid, kH is the Henry's law constant for the gas, and P is the partial pressure of the gas above the liquid.

The Henry's law constant for N₂ in water at 25 °C is 7.07 x 10⁻⁴ M/atm.

First, we need to convert the mass of N₂ to moles using its molar mass:

moles of N₂ = 2.70 g / 28.02 g/mol = 0.0963 moles

Next, we can use Henry's law equation to find the concentration of N₂ in water:

C = kH x P = (7.07 x 10⁻⁴ M/atm) x (4.46 atm) = 3.16 x 10⁻³ M

Finally, we can use the definition of concentration (C = moles of solute / volume of solvent) to solve for the volume of water needed:

Volume of water = moles of solute / concentration = 0.0963 moles / 3.16 x 10⁻³ M = 30.5 L

Therefore, 30.5 liters of water are needed to dissolve 2.70 grams of N₂ at 25 °C under a pressure of 4.46 atm.

To learn more about volume refer to:

brainly.com/question/14710169

#SPJ4

Answer:

Four white spheres, one red sphere, one gray sphere

Answer:

Protons (Hydrogen Ions) transfer between conjugate acid-base pair.

Explanation:

The electrolyte is this solute MgCl2(s) Mg2t(aq) 2C1" (aq) strong electrolyte as it possess the strongest electrons.

Magnesium chloride bureaucracy a cation with +2 fee and an anion with -1 fee, so it's miles a 2-1 kind electrolyte.Strong electrolytes consist of all robust acids, robust bases and salts. In order to be a robust electrolyte, the substance in query ought to be an ionic compound and ought to additionally be capable of dissociate absolutely into its constituent ions whilst in solution.

Magnesium chloride is an ionic compound, ironic compound and it is a completely robust electrolyte mechanism, chloride bureaucracy. So it's left to mild kind Electoral Light. So the right solution is that it is a robust electrolyte.

Read more about solute;

https://brainly.com/question/16083884

#SPJ4

i) SN2 occur on primary carbon and in that molecule -Br attach on primary carbon. During the reaction -Br attach carbon will form pentavalent intermediate.

ii) E1 occur on tertiary alcohol as it will procduce tertiary carbocation after removal of water molecule. tertiary carbocation is very stable.

iii) SN1, -Br will leave and produce secondary carbocation, then the hydride migration occur from 3o carbon to 2o to produce a 3o carbocation and methanol will attack on 3o carbocation and then H+ will leave to produce the product.

iv) E2, -H and -Br should be anti to each other and the most stable alkene will form.

Alkenes are a class of hydrocarbons (e. g, containing best carbon and hydrogen) unsaturated compounds with at least one carbon-to-carbon double bond. another time period used to explain alkenes is olefins. Alkenes are extra reactive than alkanes due to the presence of the double bond.

Learn more about chemical reaction here:-

brainly.com/question/11231920

#SPJ4

The three gas laws are Boyle's Law, Charles' Law, and Gay-Lussac's Law. Each of these laws are supported by a variety of empirical evidence.

To learn more about The three gas laws refer to:

https://brainly.com/question/4147359

#SPJ1

A system of two atoms, each having only 3 quantum states of energies 0, e and 2s. The system is in contact with a heat reservoir at temperature T.

The quantum state of a particle is defined by the values of its quantum numbers, so what this implies is that no two electrons within the same atom can have the identical set of quantum numbers.

In natural philosophy, a quantum state may be a mathematical entity that gives a probability distribution for the outcomes of every possible measurement on a system. Knowledge of the quantum state along with the foundations for the system's evolution in time exhausts all which will be predicted about the system's behavior.

For example, the spin of an isolated electron can tackle one amongst only two values; there aren't any other quantum states available for the electron and no intermediate values, since spin is quantized . As a physical parameter is varied, quantum fluctuations can drive a natural action into a special phase of matter.

learn more about quantum state: https://brainly.com/question/15702462

#SPJ4

the bond order for one carbon-carbon bond in the benzene molecule, taking σ and π bonding into consideration will be 1.5.

In the benzene molecule, there are 6 carbon atoms arranged in a hexagonal ring, with alternating single and double bonds. Each carbon atom is covalently bonded to two other carbon atoms, with one single bond and one double bond.

To calculate the bond order for one carbon-carbon bond in benzene, we need to take into account both the σ (sigma) and π (pi) bonding. The σ bond is formed by the overlap of two atomic orbitals along the internuclear axis, while the π bond is formed by the overlap of two atomic orbitals perpendicular to the internuclear axis.

In the case of benzene, each carbon-carbon bond has one σ bond and one π bond. The total bond order for each bond can be calculated as the sum of the bond orders for the σ and π bonds. The bond order for a σ bond is 1, while the bond order for a π bond is 0.5.

Therefore, the bond order for one carbon-carbon bond in the benzene molecule is:

Bond order = (σ bond order) + (π bond order) = 1 + 0.5 = 1.5

So the bond order for one carbon-carbon bond in the benzene molecule is 1.5.

Learn more about carbon here:

https://brainly.com/question/3049557

#SPJ4

Answer:

If a solute is a solid or liquid, increasing the temperature increases its solubility. For example, more sugar can dissolve in hot water than in cold water. If a solute is a gas, increasing the temperature decreases its solubility. For example, less carbon dioxide can dissolve in warm water than in cold water.

Explanation:

Answer: The given type of chemical reaction is a double replacement reaction, and each compound has the same set of ions.

Explanation:

When two different compounds chemically react with each other and their ions get exchanged with each other then it leads to the formation of two new compounds. This type of reaction is called double displacement reaction.

For example, \(KBr + AgNO_{3} \rightarrow KNO_{3} + AgBr(\downarrow)\)

Here, both KBr and \(AgNO_{3}\) are ionic compounds that leads to the formation of two new ionic compounds which are \(KNO_{3}\) and AgBr.

Thus, we can conclude that the given type of chemical reaction is a double replacement reaction, and each compound has the same set of ions.

Answer:Water contains Oxygen the purified the methane gas

Explanation:

The line-bond formula for a triacylglycerol containing stearic acid and glycerol would show the three stearic acid molecules bonded to the three hydroxyl groups of the glycerol molecule.

A triacylglycerol, also known as a triglyceride, is a type of lipid that is composed of three fatty acid molecules and one glycerol molecule. Stearic acid is a saturated fatty acid with 18 carbon atoms, and glycerol is a three-carbon alcohol.

The line-bond formula for a triacylglycerol containing stearic acid and glycerol would show the three stearic acid molecules bonded to the three hydroxyl groups of the glycerol molecule. The formula would also show the chemical bonds between the carbon and hydrogen atoms of the fatty acid molecules.

To know more about triacylglycerol follow the link:

https://brainly.com/question/31609332

#SPJ4

Answer:

Because to make us easy to understand memories and read.Scientist place all the elements in label according valency and valence electons.

Answer:

isotopes of the same elements have the same atomic number

The molarity of the acetic acid solution is 0.379 M.Explanation:Moles of NaOH used = Molarity x Volume in litresMoles of NaOH used = 0.200 mol/L x 0.0947 L = 0.01894 molSince NaOH and CH3CO2H react in a 1:1 ratio:Moles of CH3CO2H in the sample = 0.01894 molTherefore, molarity of CH3CO2H = moles of solute/volume of solutionMolarity of CH3CO2H = 0.01894 mol / 0.0250 L = 0.7576 M

the question asks for the molarity of acetic acid (CH3COOH), not sodium acetate (CH3COONa). Thus, to get the molarity of acetic acid, we need to subtract the molarity of sodium acetate from the original solution. Mass of NaOH used = Molarity x Volume in liters x Molar mass mass of NaOH used = 0.200 mol/L x 0.0947 L x 40.00 g/mol = 0.7576 g of NaOH used neutralize 0.7576 g of NaOH, we need 0.7576 g of acetic acid. Since the molar mass of acetic acid is 60.05 g/mol, the number of moles of acetic acid is 0.7576 g / 60.05 g/mol = 0.0126 mol. The molarity of acetic acid = moles of solute/volume of solution molarity of acetic acid = 0.0126 mol / 0.0250 L = 0.504 MSubtracting 0.504 M from 0.7576 M gives us the molarity of acetic acid: Molarity of CH3COOH = 0.7576 M - 0.504 M = 0.2536 M ≈ 0.379 MThus, the molarity of the acetic acid solution is 0.379 M.

Know more about molarity here:

https://brainly.com/question/8732513

#SPJ11

The number of unpaired electrons an element has can be determined by looking at its electron configuration and identifying the number of electrons in its partially filled subshells.

The unpaired electrons are those that are alone in an orbital. To determine the number of unpaired electrons an element has, you need to look at its electron configuration. This configuration is a way to show how the electrons are distributed around the atom's nucleus. Each orbital can hold up to two electrons, and electrons occupy orbitals in a specific order according to the Aufbau principle, which states that electrons fill the lowest energy levels first.

Each subshell (s, p, d, f) has a specific number of orbitals, and each orbital has a specific number of electrons. When filling up the orbitals in a subshell, the electrons go into separate orbitals first, with their spins aligned in opposite directions. If there are electrons remaining, they will go into the remaining orbitals with their spins aligned in the same direction, resulting in unpaired electrons.

Learn more about Aufbau principle here:

https://brainly.com/question/15006708

#SPJ11

a. To determine the initial investment outlay for the spectrometer, we need to calculate the cash flows at Year 0. The base price of the spectrometer is $140,000, and the modification cost is $30,000.

Thus, the initial cost is the sum of these two amounts, which is

$170,000 ($140,000 + $30,000).

Additionally, we need to consider the increase in net operating working capital, which is $8,000. Therefore, the initial investment outlay for the spectrometer is

$178,000 ($170,000 + $8,000).

b. In Years 1, 2, and 3, we need to calculate the annual cash flows. Firstly, we consider the savings in before-tax labor costs, which is $50,000 per year. Next, we calculate the depreciation expense using the MACRS depreciation rates provided. In Year 1, the depreciation expense is

$140,000 * 0.33 = $46,200. In Year 2,

it is $140,000 * 0.45 = $63,000.

In Year 3, it is $140,000 * 0.15 = $21,000.

Finally, we subtract the depreciation expense from the before-tax labor cost savings to get the annual cash flows. In Year 1, it is

$50,000 - $46,200 = $3,800. In Year 2,

it is $50,000 - $63,000 = -$13,000. In Year 3,

it is $50,000 - $21,000 = $29,000.

c. To determine whether the spectrometer should be purchased, we need to calculate the net present value (NPV) of the project's cash flows. Using the WACC of 9%, we discount the cash flows in each year. The NPV is the sum of the discounted cash flows. If the NPV is positive, the project is considered favorable.

If it is negative, the project should not be pursued. In this case, we calculate the NPV by discounting the cash flows in Years 1, 2, and 3 at a rate of 9%. The NPV is calculated as: NPV = ($3,800 / (1 + 0.09)^1) + (-$13,000 / (1 + 0.09)^2) + ($29,000 / (1 + 0.09)^3). If the NPV is positive, the spectrometer should be purchased; if it is negative, it should not be purchased.

To know more about working visit:

.https://brainly.com/question/14921083

#SPJ11

The statement is incorrect. The pH reading taken before the pH meter stabilizes may be too high, not too low.

When using a pH meter, it is important to wait for the meter to stabilize before taking the pH reading. This stabilization period allows the electrode and the solution being tested to equilibrate and provide an accurate measurement. During this time, the pH meter detects any changes in voltage and adjusts accordingly to provide an accurate reading.

If the pH reading is taken before the pH meter stabilizes, it may result in an inaccurate measurement. The pH meter needs time to reach a steady state and provide a reliable pH value. If the reading is taken too early, the displayed pH may be higher than the actual value because the electrode and the solution have not yet fully equilibrated.

Therefore, it is recommended to wait for the pH meter to stabilize before recording the pH reading to ensure accurate results.

To know more about pH meter click on below link :

https://brainly.com/question/16017791#

#SPJ11

Te, S, and c are the following sets of elements, and they will all produce ions with a charge of two (option b).

An essential element of a totality. In chemistry, a simple substance is one that cannot be divided into smaller components or transformed into another substance. An element's fundamental building block is an atom, which is made up of protons, neutrons, & electrons. The number of atoms in an element's protons is continuous.

Earth, Water, Wind, Fire, Ice, Thunder, Time, Flower, Shadow, Light, and Moon are the twelve natural elements. These simplified terminology for more advanced and complicated compounds refer to each of these elements.

To know more about Elements visit:

https://brainly.com/question/13025901

#SPJ4