Write a balanced equation for the complete oxidation of propanoic acid.

In the dry cell battery, the element being oxidized during use is zinc.

The chemical reaction that takes place in a dry cell battery involves the oxidation of zinc (Zn) which is the anode, and the reduction of manganese dioxide (MnO2) which is the cathode. The reaction generates an electric current that flows through the battery to power electronic devices. As the battery discharges, the zinc is oxidized to form zinc ions (Zn2+) which dissolve into the electrolyte, and the manganese dioxide is reduced to form manganese oxide (Mn2O3) which stays on the cathode. Therefore, the reaction in the dry cell battery involves the transfer of electrons from the zinc anode to the manganese dioxide cathode, with the zinc being oxidized and the manganese dioxide being reduced. Answer more than 100 words.
In the dry cell battery, during use, the element being oxidized is zinc (Zn). This is evident in the provided chemical reaction:
Zn(s) + 2MnO2(s) + 2NH4+(aq) → Zn2+(aq) + Mn2O3(s) + 2NH3(aq) + H2O(ℓ)
Here, zinc (Zn) is losing electrons, resulting in the formation of Zn2+ ions. This process is known as oxidation.

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Answer:

I think it's a

Explanation:

not sure hssjkskaakakskksskksqoqkakskzksjsj

Answer: The answer is, D) Burning.

Explanation: Some moderator removed my last answer because someone reported it.

Answer:

Intermolecular force for oil the dipole-dipole.

Intermolecular force for water hydrogen bonds.

Intermolecular force for vegetable oil nonpolar compound.

Intermolecular force for corn syrup fructose.  

The question is incomplete but i will try to offer as much help as i can.

Answer:

See explanation

Explanation:

The electron was discovered by J.J Thompson. His model of the atom was called the plum-pudding model of the atom.

He discovered that cathode rays being negatively charged particles were deflected by a magnet in just the same way as moving, negative electrically charged particles.

Similarly, in an electric field, they are deflected towards the positive plate of the electrostatic field which shows that they are negatively charged.

Answer:

Na

Explanation:

Reactant side:

1 Na

1 Mg

2 F

Product side:

2 Na

1 Mg

2 F

There is one more Na atom on the product side than the reactant side. To balance this, multiply the Na on the reactant side by 2.

Nucleic acids, ribonucleic acid (RNA) and deoxyribonucleic acid (DNA), are essential biomolecules for cell genetic information and protein synthesis. They consist of sugar molecules, phosphate groups, and nitrogenous bases.

Polymers containing repeating units called nucleotides are nucleic acids. The two primary forms of nucleic acids are ribonucleic acid (RNA) and deoxyribonucleic acid (DNA). RNA and DNA are critical biomolecules that provide genetic information to the cell and also aid in protein synthesis. Both RNA and DNA are chains of nucleotides that are composed of three different elements: a sugar molecule, a phosphate group, and a nitrogenous base. The sugar in RNA is ribose, while the sugar in DNA is deoxyribose.

There are four distinct nitrogenous bases that are found in nucleotides. These are adenine (A), cytosine (C), guanine (G), and thymine (T). RNA and DNA differ in the nitrogenous base used; RNA has uracil (U) instead of thymine (T).In summary, the examples of polymers that contain repeating units known as nucleotides are RNA and DNA.

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Answer:

it's volume also decrease

Dr. Farquart is trying to establish the relationship between eating a sauce  and gas problems.

The term experiment refers to the tool that is used in science to establish cause and effect relationships. In this experiment Dr. Farquart is trying to establish the relationship between eating a sauce  and gas problems.

1) The control group is group B

2) The independent variable is the sauce eaten

3) The dependent variable is the production of gas

4) Dr. Farquart conclusion is that the  new sauce is able to reduce the gas problems of the participants

5) 8 people in group B reported feeling better because they thought that they were eating the new sauce.

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If you have purchased used machinery and it does not come with maintenance instructions, you should contact the manufacturer or check their website.

New machinery always come with maintenance instructions.

With an used machinery that is not always a case.

Machinery manufacturer is the best place to get help for some issues.

The manufacturer can provide necessary informations about maintenance instructions and other important informations about their products.

Another place to find necessary informations is website of the manufacturer of the used machinery. Website usually have many others usefull informations about the product. Many manufacturer optimize their information pages.

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Answer:

two moles noen

To calculate the amount of oxygen gas required for the complete reaction of 0.553 mol of zinc sulfide, we can use the stoichiometry of the balanced chemical equation:

2ZnS(s) + 3O2(g) → 2ZnO(s) + 2SO2(g)

From the equation, we can see that 2 moles of ZnS react with 3 moles of O2.

To find the moles of O2 needed for 0.553 moles of ZnS, we can set up a proportion:
(0.553 mol ZnS) × (3 mol O2 / 2 mol ZnS)

The mol ZnS units cancel out, and we are left with:
(0.553 × 3) / 2 = 0.8295 mol O2

So, 0.8295 moles of oxygen gas are required for the complete reaction of 0.553 moles of zinc sulfide.

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Answer:

41.67 mol

Explanation:

1 Litre of water = 1000g

Mole = mass / molar mass

Mass of 1 L of water = 1000 g

Molar mass of water (H2O) :

(H = 1, O = 16)

H2O = (1 * 2) + 16 = (2 + 16) = 18g/mol

Amount of water consumed = (3/4) of 1 litre

= (3/4) * 1000g

= 750g

Therefore mass of water consumed = 750g

Mole = 750g / 18g/mol

Mole of water consumed = 41.6666

= 41.67 mol

The number of gas particles in a container will have the greatest impact on pressure.

The number of gas particles in a container has the greatest impact on pressure because pressure is directly related to the frequency and magnitude of molecular collisions with the container walls.

When gas particles are in motion, they collide with each other and with the walls of the container. These collisions exert a force on the walls, which we perceive as pressure. The more gas particles there are in the container, the greater the number of collisions with the walls per unit of time.

According to the kinetic theory of gases, the pressure of a gas is proportional to the average kinetic energy and the frequency of collisions of the gas particles. Increasing the number of gas particles increases the frequency of collisions, resulting in more forceful and frequent impacts on the container walls. This leads to a higher pressure.

Conversely, if the number of gas particles decreases, there are fewer collisions occurring per unit of time, resulting in a lower pressure. Therefore, the number of gas particles in a container has the greatest influence on the pressure exerted by the gas inside.

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Answer:

The change from a liquid phase to a gaseous phase.

so the answer would be it changed to a gaseous phase

---------------

This is what occurs when the vapor pressure of the liquid is equal to the atmospheric pressure exerted on the liquid.

Answer: a mercury thermometer is better to measure very small changes in temperature

Explanation:

i took the test and got it right

Answer:

the answer is C, a mercury thermometer is better to measure very small changes in temperature.

Explanation:

i just took the test and it was correct :)

What is Stoichiometry?

Stoichiometry is the relationship between two substances through use of ratios.

To answer these questions, you must use the ratio:

1 mol of a substance      

6.022 × 10²³ molecules

Let's try the first question:

9.25 × 10³⁴ molecules H₂O     ×         1 mol H₂O        

                                                 6.022 × 10²³ molecules

The molecules will cancel out, leaving you with

9.25 × 10³⁴ mol

6.022 × 10²³ mol

Use your calculator to solve:  1.536 × 10¹¹ mol H₂O

Now, follow this same format to solve the rest of the questions:

2) 4.51 × 10¹⁵ molecules Al      ×       1 mol Al      

                                                 6.022 × 10²³ molecules

= 4.51 × 10¹⁵ mol Al

6.022 × 10²³ mol Al

= 7.489 × 10⁻⁹ mol Al

3) 3.78 × 10²⁰ molecules Li    ×         1 mol Li        

                                                 6.022 × 10²³ molecules

0.0006276 mol Li

_________________________________________________________

Answer:

Explanation: A chemical reaction is when something molds, rusts, or bakes, for example, a fruit molds or rots, that's a chemical reaction, if a cake is being baked, its a chemical reaction, this is my explanation, I'm not sure if its 100% correct but this is what I think it is.

When a flask containing 125 ml of hexanes is boiled at 342 K (68.73 °C), the hexanes will begin to vaporize.

When a flask containing 125 ml of hexanes is boiled at 342 K, the hexanes will undergo a phase transition from a liquid to a gas, also known as vaporization. The boiling point of hexanes is 68.73 °C and 342 K is equivalent to 68.73 °C, which is the temperature at which the hexanes will start to vaporize.

The kinetic energy of the hexanes molecules will increase as the temperature rises, eventually reaching a point where they have enough energy to overcome the forces that hold them together in the liquid state, and they will turn into a gas and escape into the flask's headspace. This process continues until all the liquid hexanes is vaporized.

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Answer:

A group of cells working together is defined as a tissue and several tissues working together comprise an organ.

Explanation:

The very dark soils samples that contain the highest amounts of carbon and nitrogen is loamy soil.

Soil is the outermost portion of the earth's crust on which plants grow. The appearance of a soil sample gives an idea of the type and nature of the soil it is.

We are told that two out of the six soil samples gathered are very dark and contains an enormous amount of carbon and nitrogen. These two must be samples of loamy soil.

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Answer:

[He] 2s2 2p2

Explanation:

The alkyl halides ranked in order of increasing E2 reactivity are: lowest reactivity - tert-butyl bromide; intermediate reactivity - sec-butyl bromide; highest reactivity - ethyl bromide.

Tert-butyl bromide is the least reactive alkyl halide because it has the greatest steric hindrance, meaning there is less space for the nucleophile and base to interact. Sec-butyl bromide has intermediate reactivity because it has less steric hindrance than tert-butyl bromide but more than ethyl bromide. Ethyl bromide is the most reactive alkyl halide because it has the least steric hindrance and therefore the nucleophile and base can interact with ease. In summary, the order of increasing E2 reactivity is: tert-butyl bromide, sec-butyl bromide, and ethyl bromide.

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In a solution, the relative concentrations of hydrogen ions (H+) and hydroxide ions (OH-) determine its acidic, basic, or neutral nature.

In a basic solution, the concentration of hydroxide ions (OH-) is higher than the concentration of hydrogen ions (H+). In an acidic solution, the concentration of hydrogen ions is higher than the concentration of hydroxide ions. In a neutral solution, the concentrations of hydrogen ions and hydroxide ions are equal.

The quantity of hydrogen and hydroxide ions in an aqueous solution affects whether it is acidic or alkaline.

The solution is more acidic the more hydrogen ions it contains. A fall in the pH scale results from an increase in hydrogen ions. The hydrogen ion concentration of the pH scale, which ranges from 0 to 2, is quite high, and as it falls, the pH value rises.

Alkalinity increases as hydroxide ion concentration increases. The pH value rises as the concentration of hydroxide ions increases. The pH range of 12 to 14 indicates a very high level of alkalinity. The pH value rises as the concentration of hydroxide ions does.

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Answer:

40.8g of sodium sulfate must be added

Explanation:

The reaction of barium nitrate, Ba(NO₃)₂ with sodium sulfate, Na₂SO₄ is:

Ba(NO₃)₂ + Na₂SO₄ → 2 NaNO₃ + BaSO₄(s)

That means, for a complete reaction of an amount of barium nitrate you must add the same amount in moles of sodium sulfate. To solve this problem we need to convert the mass of barium nitrate to moles = Moles of sodium sulfate that must be added:

Moles Ba(NO₃)₂ -Molar mass: 261.3g/mol-:

75g * (1mol / 261.3g) = 0.287 moles = Moles Na₂SO₄

Mass Na₂SO₄ -Molar mass: 142.04g/mol-:

0.287 moles * (142.04g / mol) =

NH3 or ammonia is a basic substance. By taking a proton (H+) from an acid to create the ammonium ion (NH4+), it can function as a weak base. Ammonia will combine with water molecules in water to generate

Ammonia (NH3), an odourless gas with a wide range of industrial applications, is widely utilised. It is a crucial ingredient in the creation of plastics, cleaning supplies, and fertilisers. In addition to these uses, ammonia is also a refrigerant and is a component in the manufacturing of drugs and explosives. It can accept a proton (H+) from an acid to generate the ammonium ion (NH4+) since it is a basic molecule. Ammonia creates hydroxide and ammonium ions in water, which results in a basic solution. Yet, ammonia is also a hazardous gas that, if handled improperly, may be detrimental to both humans and animals.

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Answer:

what concept?

Explanation:

Answer:

true true what concept?

Explanation:

The electrons stay in the electron cloud and do not fly off because of the stronger attraction to the proton.

In the electron cloud, the positive charge of the proton binds the electron from flying off since opposites attract. This allows the electrons to move around the nucleus of an atom. The nucleus is positively charged and the electrons that moves around the nucleus are negatively charged. so they attract each other. It is because the atom is so small. There are too many protons. some of the outer protons are loosely bound and more free to react with the electron. Most atoms do not have too many protons. so there is nothing for the electron to interact with. Therefore, each electron in a stable atom remains in its wavefunction shape.

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The two everyday examples of the thermal energy of a substance being decreased are:

Instant cold pack

Cooling food

Thermal energy is the total internal energy of an object or substance, arising from the motion and vibration of its atoms and molecules. It is a type of kinetic energy that is associated with the temperature of the object or substance. Thermal energy is often measured in units of joules (J) or calories (cal). It can be transferred from one object or substance to another through the processes of conduction, convection, and radiation.

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The fugacity in atm for pure ethane at 310 K and 20.4 atm is given by the equation: f = 20.4 exp (-Δg1/RT). The change in chemical potential between this state and a second state of ethane where the temperature is constant but the pressure is 24 atm is -0.0911RT.

Fugacity is a measure of the escaping tendency of a component in a mixture, which is defined as the pressure that the component would have if it obeyed ideal gas laws. It is used as a correction factor in the calculation of equilibrium constants and thermodynamic properties such as chemical potential. Here we need to determine the fugacity in atm for pure ethane at 310 K and 20.4 atm and the change in the chemical potential between this state and a second state of ethane where the temperature is constant but the pressure is 24 atm. So, using the formula of fugacity: f = P.exp(Δu/RT) Where P is the pressure of the system, R is the gas constant, T is the temperature of the system, Δu is the change in chemical potential of the system.  Δu = RT ln (f / P)The chemical potential at the initial state can be calculated using the ideal gas equation as: PV = nRT    

=>  P

= nRT/V

=> 20.4 atm

= nRT/V

=> n/V

= 20.4/RT The chemical potential of the system at the initial state is:

Δu1 = RT ln (f/P)

= RT ln (f/20.4) Also, we know that for a pure substance,

Δu = Δg. So,

Δg1 = Δu1 The change in pressure is 24 atm – 20.4 atm

= 3.6 atm At the second state, the pressure is 24 atm.

Using the ideal gas equation, n/V = 24/RT The chemical potential of the system at the second state is: Δu2 = RT ln (f/24) = RT ln (f/24) The change in chemical potential is Δu2 – Δu1 The change in chemical potential is

Δu2 – Δu1 = RT ln (f/24) – RT ln (f/20.4)

= RT ln [(f/24)/(f/20.4)]

= RT ln (20.4/24)

= - 0.0911 RT Therefore, the fugacity in atm for pure ethane at 310 K and 20.4 atm is:

f = P.exp(Δu/RT)

=> f

= 20.4 exp (-Δu1/RT)

=> f

= 20.4 exp (-Δg1/RT) And, the change in the chemical potential between this state and a second state of ethane where the temperature is constant but pressure is 24 atm is -0.0911RT. Therefore, the fugacity in atm for pure ethane at 310 K and 20.4 atm is given by the equation: f = 20.4 exp (-Δg1/RT). The change in chemical potential between this state and a second state of ethane where the temperature is constant but the pressure is 24 atm is -0.0911RT.

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