An important industrial source of ethanol is the reaction, catalyzed by H₃PO₄, of steam with ethylene derived from oil:
C₂H₄(g) + H₂O(g) ⇄ C₂H₅OH(g)
ΔH°rxn = -47.8kj Kc = 9 ×10³ at 600K(c) Calculate Kc at 450. K.

Answer:42 atoms at least

42

Explanation:

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Answer:

Square

Explanation:

A square is a quadrilateral with r sides the same length

Answer: Energy stored in an object due to its position is Potential Energy. The energy that a moving object has due to its motion is Kinetic Energy. All forms of kinetic energy are the result of a previous state of potential energy. For example, the stored chemical potential energy of a battery converts to electrical kinetic energy to transport electricity to a light bulb, which radiates thermal kinetic energy. Potential energy is the energy that is stored in an object due to its position relative to some zero position. An object possesses gravitational potential energy if it is positioned at a height above (or below) the zero height.

When using a Van de Graaff generator charges repel because all the charges are negatively charged.

The Van de Graaff become negatively charged, because the rubber belt is an insulator and a poor conductor of electricity, the positive charge does not spread evenly across the belt.

Instead, as a result of electric induction, the inside of the belt remains positively charged, while the outside of the belt becomes negatively charged.

Thus, When using a Van de Graaff generator charges repel because all the charges are negatively charged.

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The difference in binding energy per nucleon between 23/11 Na and 23/12 Mg can be calculated by finding the total binding energy for each isobar and dividing it by the respective number of nucleons.

To calculate the difference in binding energy per nucleon between the isobars 23/11 Na and 23/12 Mg, we need to find the total binding energy for each isobar and then divide it by the respective number of nucleons.

The atomic mass of 23/11 Na is 23, which means it has 23 nucleons (protons and neutrons). The atomic number is 11, indicating it has 11 protons.

The atomic mass of 23/12 Mg is also 23, so it has 23 nucleons. However, the atomic number is 12, indicating it has 12 protons.

We can use the equation:

Binding Energy per Nucleon = (Total Binding Energy) / (Number of Nucleons)

To find the total binding energy, we can consult a table or use an approximate average value. Let's assume the average binding energy per nucleon for both elements is 8.5 MeV (million electron volts).

For 23/11 Na:

Binding Energy per Nucleon = (Total Binding Energy of Na) / (Number of Nucleons)

                         = (8.5 MeV) / (23 nucleons)

For 23/12 Mg:

Binding Energy per Nucleon = (Total Binding Energy of Mg) / (Number of Nucleons)

                         = (8.5 MeV) / (23 nucleons)

The difference in binding energy per nucleon can then be calculated by subtracting the value for Na from the value for Mg.

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They give us the balanced equation of the reaction. Now, we need to know the moles of HIO3 present in the solution that they describe to us. We are given the molarity and volume of the solution, so the moles will be:

Now, we will find the moles of HCl that will be needed to react 0.24mol of HIO3. We see the stoichiometry of the reaction. The ratio HCl to HIO3 is 5/1. So, the moles of HCl that we need is:

They ask us about the volume of the solution, we have the molarity and the moles. So, the volume will be:

To react completely with 150 mL of 1.6 M HIO3 solution are needed 1.0 of 1.2M solution of HCl .

So, the answer will be the last option: 1.0L

Answer:

C.It remains at rest or moves at constant speed in the same direction.

Explanation:

First, remember the Newton's 1st law of motion which states that the object at rest will remain at rest and that in motion will stay in motion with the same speed and same direction unless acted by unbalance forces.

Balanced forces on an object occur when two forces at act on an object are equal in size and act in opposite direction. In this case, a stationary object will stay at  rest while an object moving will continue to move at the same speed and same direction.

An object acted by balanced forces is said to be at equilibrium, thus the state of motion will be maintained.The object will not accelerate. A good example of an object acted by balanced forces is an object at rest or in constant motion such as a car that stopped at red-light signal or a car travelling at a constant speed.

Answer:

Its food for cannibals.

The molarity of the final solution is 0.368 M.

Phosphoric acid, also known as orthophosphoric acid, monophosphoric acid, or phosphoric(V) acid, is an inorganic solid with the chemical formula H3PO4 that contains phosphorus.

This can be calculated using the equation \(M1V1 = M2V2,\)

where \(M1\) is the molarity of the concentrated \(H3PO4 (14.7 M)\)

\(V1\) is the volume of the concentrated \(H3PO4 (25.0 mL)\)

\(M2\) is the molarity of the diluted solution (unknown)

and \(V2\) is the volume of the diluted solution, may be used to determine this \((750.0 mL)\)

When the given numbers are plugged in, the result is

\((14.7 M)(25.0 mL) = M2(750.0 mL),\)

\(M2 = 0.368 M.\)

The Molarity of final solution is 0.368M

It is frequently found as an 85% aqueous solution, which is a syrupy liquid that is colourless, odourless, and non-volatile. It is a significant industrial chemical that is used in several fertilisers.

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complete question:

A 25.0 mL sample of concentrated H3PO4 (14.7 M) is diluted to a final volume of 750.0 mL. What is the molarity of the final solution?

Group of answer choices

0.368

0.750

0.490

0.980

Answer:

a Control Variable in an experiment remains the same.

Answer:

titanium (I) chloride

Explanation:

Tin has a chemical formular of "Sn"

\(.\)

Answer:

Lithium will lose about 2 electrons

Making it a cation

Answer:

about three

Explanation:

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The first action that needs to happen for light reactions to start is b) Accessory pigments absorb photons. In the process of photosynthesis, light reactions occur in the thylakoid membranes of chloroplasts.

The first step in these reactions is the absorption of light energy by accessory pigments, such as chlorophyll b and carotenoids. These pigments are capable of capturing photons of light at different wavelengths. When photons are absorbed by the accessory pigments, they transfer their energy to the reaction center chlorophyll a molecule.

After the energy reaches the reaction center, it initiates a series of electron transfer reactions, leading to the generation of ATP (adenosine triphosphate) and NADPH (nicotinamide adenine dinucleotide phosphate) molecules, which are used in the subsequent stages of photosynthesis.

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2.96 liters of a 0.0550 M KCl solution contain 0.163 moles of KCl using the formula moles of solute = molarity x volume of solution in liters.

To determine the volume of the 0.0550 M KCl solution that contains 0.163 moles of KCl, we can use the following formula: moles of solute = molarity x volume of solution in liters. Rearranging the formula to solve for volume, we get: volume of solution in liters = moles of solute/molarity

Substituting the given values, we have a volume of solution in liters = 0.163 moles / 0.0550 M the volume of solution in liters = 2.96 L (rounded to two significant figures). Therefore, 2.96 liters of the 0.0550 M KCl solution contain 0.163 moles of KCl.

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Answer:

D. Hydrogen and chlorine

Explanation:

Answer:

d

Explanation:

hydrogen and chlorine

is the compound of hydrochloric acid

In 1.75 mol of methane (CH4) is 1.05 x 10^24 molecules of methane (CH4).

The number of molecules present in 1.75 mol of methane (CH4) is calculated in the following way:

In order to calculate the number of molecules of a substance in a given amount of the substance, Avogadro's constant is required.

Avogadro's constant, 6.022 x 10^23 particles per mole, represents the number of particles per mole of the substance, whether it is molecules or atoms.

To calculate the number of molecules in a given amount of substance, the quantity of moles is multiplied by Avogadro's constant.

Therefore, the number of molecules of methane in 1.75 moles of methane can be calculated as follows:

1.75 mol CH4 x (6.022 x 10^23 molecules/mol) = 1.0535 x 10^24 molecules of CH4

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Answer:

D

Explanation:

one of a series of test

The net ionic equation focuses on the species that are directly involved in the reaction, highlighting the formation of solid calcium sulfate (CaSO4).

The reaction between sodium sulfate (Na2SO4) and calcium chloride (CaCl2) can be represented by the following balanced chemical equation:

Na2SO4(aq) + CaCl2(aq) → 2NaCl(aq) + CaSO4(s)

To write the complete ionic equation, we need to break down all the soluble compounds into their respective ions:

Na2SO4(aq): 2Na⁺(aq) + SO4²⁻(aq)

CaCl2(aq): Ca²⁺(aq) + 2Cl⁻(aq)

2NaCl(aq): 2Na⁺(aq) + 2Cl⁻(aq)

CaSO4(s): CaSO4(s)

By substituting the ions into the balanced chemical equation, the complete ionic equation is:

2Na⁺(aq) + SO4²⁻(aq) + Ca²⁺(aq) + 2Cl⁻(aq) → 2Na⁺(aq) + 2Cl⁻(aq) + CaSO4(s)

In the complete ionic equation, the ions that appear on both sides of the equation (Na⁺ and Cl⁻) are called spectator ions. They do not participate in the actual chemical reaction and can be eliminated from the equation. Simplifying the equation by removing the spectator ions gives the net ionic equation:

SO4²⁻(aq) + Ca²⁺(aq) → CaSO4(s)

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Answer

- What is an electron?

An electron a stable subatomic particle with a negative charge of electricity, it is found in all atoms and acting as the primary carrier of electricity in solids.

- How does the electrons movement creates an electric current?

Electrons flow in a certain rate, creating an electric current. So the electrons moving freely from one place to another place will conduct electric current.

At STP (standard temperature and pressure, T = 273K and P = 1 atm), a mol of gas will have a volume of 22.4 Liters, so if we have 57.1 Liters of CO2, we will have:

22.4 L = 1 mol

57.1 L = x moles of CO2

x = 2.5 moles of CO2 in 57.1 L at STP

During this process, the hexanes in the flask will boil and turn into vapour at their boiling point of 68.73 °C (342 °K). This occurs because the heat being applied to the flask causes the temperature of the hexanes to increase, and when it reaches the boiling point, the liquid will begin to turn into a gas.

The vapour will then rise and escape from the flask. As the vapour exits the flask, it will cool and eventually condense back into a liquid. This process is known as "boiling."

Hexanes in the flask will boil and turn into vapour because of the heat being applied. Vapor rises and escapes from the flask, then condenses back into liquid. This is a boiling process.

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Nanomaterials, whether natural, engineered, organic, or inorganic, offer various applications across industries. However, their environmental health and safety impacts need to be carefully evaluated and managed to mitigate any potential risks.

Understanding their properties, fate, and behavior in different environments is crucial for responsible development, use, and disposal of nanomaterials.

Natural Nanomaterials:

Examples: Carbon nanotubes (CNTs) derived from natural sources like bamboo or cotton, silver nanoparticles in natural colloids, clay minerals (e.g., montmorillonite), iron oxide nanoparticles found in magnetite.

Uses: Natural nanomaterials have various applications in medicine, electronics, water treatment, energy storage, and environmental remediation.

Environmental health and safety impacts: The environmental impacts of natural nanomaterials can vary depending on their specific properties and applications. Concerns may arise regarding their potential toxicity, persistence in the environment, and possible accumulation in organisms. Proper disposal and regulation of their use are essential to minimize any adverse effects.

Engineered Nanomaterials:

Examples: Gold nanoparticles, quantum dots, titanium dioxide nanoparticles, carbon nanomaterials (e.g., graphene), silica nanoparticles.

Uses: Engineered nanomaterials have widespread applications in electronics, cosmetics, catalysis, energy storage, drug delivery systems, and sensors.

Environmental health and safety impacts: Engineered nanomaterials may pose potential risks to human health and the environment. Their small size and unique properties can lead to increased toxicity, bioaccumulation, and potential ecological disruptions. Safe handling, proper waste management, and risk assessment are necessary to mitigate any adverse effects.

Organic Nanomaterials:

Examples: Nanocellulose, dendrimers, liposomes, organic nanoparticles (e.g., polymeric nanoparticles), nanotubes made of organic polymers.

Uses: Organic nanomaterials find applications in drug delivery, tissue engineering, electronics, flexible displays, sensors, and optoelectronics.

Environmental health and safety impacts: The environmental impact of organic nanomaterials is still under investigation. Depending on their composition and properties, they may exhibit varying levels of biocompatibility and potential toxicity. Assessments of their environmental fate, exposure routes, and potential hazards are crucial for ensuring their safe use and minimizing any adverse effects.

Inorganic Nanomaterials:

Examples: Quantum dots (e.g., cadmium selenide), metal oxide nanoparticles (e.g., titanium dioxide), silver nanoparticles, magnetic nanoparticles (e.g., iron oxide), nanoscale zeolites.

Uses: Inorganic nanomaterials are utilized in electronics, catalysis, solar cells, water treatment, imaging, and antimicrobial applications.

Environmental health and safety impacts: Inorganic nanomaterials may have environmental impacts related to their potential toxicity, persistence, and release into ecosystems. Their interactions with living organisms and ecosystems require careful assessment to ensure their safe use and minimize any negative effects.

Understanding their properties, fate, and behavior in different environments is crucial for responsible development, use, and disposal of nanomaterials.

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Hello! HNO2 is not a strong acid so therefore your answer is A.

A rule of thumb, the rest are strong acids, so when you ever come across a similar question you will be able to rule out the wrong answers quicker :).

Strong acid list:

H2SO4

HNO3

HCLO4

HCLO3

HCL

HBr

HI

hope this helps!

The value of Kc for this reaction is 12.

The value of Kc for a reaction can be determined by using the equilibrium constants of the individual reactions involved. In this case, we have multiple reactions, and we need to determine the overall equilibrium constant.

To find the overall equilibrium constant (Kc) for the reaction, we need to consider the stoichiometry of the reactions. If the reactions are added, the equilibrium constants are multiplied. So, for the given reactions, we can write the overall reaction as follows:

Overall Reaction: equation

To find the overall Kc, we multiply the equilibrium constants of the individual reactions:

Kc overall = (Kc1)^(a) x (Kc2)^(b)

Where a and b are the stoichiometric coefficients of the individual reactions.

Let's say Kc1 = 2 and Kc2 = 3, and a = 2 and b = 1. Plugging these values into the equation, we get:

Kc overall = (2)^2 x (3)^1 = 12

So, the value of Kc for this reaction is 12.

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Answer:

19.9 moles

Explanation:

Each mole has 6.02 x 10^23 many atoms. This number is commonly known as "Avogadro's Number."

In this problem, we have 1.2 x 10^25 atoms of phosphorus.

Thus, (1.2 x 10^25)/(6.02 x 10^23) is the number of moles in 1.20 x 10^25 many atoms of phosphorus.

(1.2(10^25))/(6.02(10^23))

19.9 moles.

The moles are 19.9 moles

Each mole has \(6.02 \times 10^{23}\) many atoms.

This number is commonly known as "Avogadro's Number."

In this given question, we have \(1.2 \times 10^{25}\) atoms of phosphorus.

So \((1.2 \times 10^{25})\div (6.02 \times 10^{23})\)is the number of moles in\(1.20 \times 10^{25}\) many atoms of phosphorus.

Now  

\((1.2(10^{25}))\div (6.02(10^{23}))\)

19.9 moles.

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The mass of 3.02 cm³ of Bismuth is 29.45 grams.

Bismuth is an element that belongs to group 15 of the periodic table.

We know that the density(ρ) of a substance is given by the following formula,

Density (ρ) = Mass of the substance/Volume of the substance

As the density and volume of the metal are given, the mass of the element can be calculated by putting the given values in the given formula.

9.75 g/cm³ = Mass/3.02 cm³

Mass = 29.45 grams

Thus, the mass of 3.02 cm³ of Bismuth is 29.45 grams.

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Phosphorous halides and alcohol react to form alkyl halides, as well as the byproducts phosphoryl chloride (POCl3) and HCl.

The best methods for converting alcohols into alkyl halides are phosphorous halides and thionyl chloride.

As a chlorinating agent, it is employed. It serves as an intermediary in the production of phosphoric acid derivatives, chloro-anhydrides, and phosphorus acid. It serves as an intermediary in the production of organophosphorus insecticides, water purification systems, lubricant additives, and other products.

A fuming, oily liquid with a pungent stench, phosphorus oxychloride can range in hue from white to pale yellow. In addition to being employed as a chlorinating agent, it is also used in the production of semiconductors, plasticizers, hydraulic fluids, and pesticide-like organophosphorus compounds.

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Note: The correct question would be as bellow,

What are the products of following reaction?

\(CH_3CH_2 -OH+PC1_5- >\)