Based on the following chemical equation how many molecules of Hydrogen (H) are present in the reactants side?

2H2 + O2 ----> 2H2O
Question 1 options:


1


2


3


4

Answer:

the pressure of the gas is 1.67 atm when the volume increased to 4.5 L.

Explanation:

Assuming the temperature and the amount of gas remain constant (i.e., the process is isobaric):

Using Boyle's law, we can relate the initial pressure (P1) and volume (V1) to the final pressure (P2) and volume (V2):

P1V1 = P2V2

Plugging in the given values:

P1 = 1.50 atm

V1 = 5.00 L

V2 = 4.5 L

Solving for P2:

P2 = (P1V1)/V2 = (1.50 atm x 5.00 L)/4.5 L = 1.67 atm

Answer:

C8H18(g) + 12.5O2(g) -> __8__CO2(g) + 9H2O(g) + heat

CH4(g) + _2___O2(g) -> ____CO2(g) + _2___H2O(g) + heat

C3H8(g) + _5___O2(g) -> _3___CO2(g) + __4__H2O(g) + heat

2C6H6(g) + __15__O2(g) ->  __12__CO2(g) + __6__H2O(g) + heat

Explanation:

I hope it helps!

Fossil fuels are natural energy resources formed from the remains of ancient plants and organisms, such as coal, oil, and natural gas, which are burned to release energy.

Balanced reactions are as follows:

C₈H₁₈ (g) + 12.5O₂ (g) → 8CO₂ (g) + 9H₂O(g) + heat

CH₄ (g) + 2O₂ (g) → 1CO₂ (g) + 2H₂O (g) + heat

C₃H₈ (g) + 5O₂ (g) → 3CO₂ (g) + 4H₂O (g) + heat

C₆H₆ (g) + 7.5O₂ (g) → 6CO₂ (g) + 3H₂O (g) + heat

A combustion reaction, also known as a combustion process, is a chemical reaction in which a substance combines with oxygen to produce heat and light. It involves the rapid oxidation of a fuel in the presence of an oxidizer, typically atmospheric oxygen. The reaction releases energy in the form of heat and light.

The general equation for a combustion reaction can be represented as: fuel + oxygen → carbon dioxide + water + energy.

Combustion reactions are essential for various processes, including the burning of fossil fuels for energy production, combustion engines in vehicles, and even the process of respiration in living organisms.

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Answer: 0.983 moles of carbon dioxide are present

Explanation:

To determine the number of moles of carbon dioxide (CO₂) present when there are 11.8 x 10²³ atoms of oxygen, we need to consider the molecular formula of carbon dioxide.

The molecular formula of carbon dioxide (CO₂) indicates that there is one carbon atom and two oxygen atoms in each molecule of carbon dioxide.

Given that there are 11.8 x 10²³ atoms of oxygen, we can divide this number by 2 to determine the number of carbon dioxide molecules present, since each molecule of carbon dioxide contains two oxygen atoms.

Number of carbon dioxide molecules = \(\frac{11.8 X 10^2^3 atoms of oxygen }{2}\)

Next, we can use Avogadro's number, which states that there are approximately 6.022 x 10²³molecules per mole, to convert the number of carbon dioxide molecules to moles.

Number of moles of carbon dioxide = (11.8 x 10²³ atoms of oxygen / 2) / (6.022 x 10^23 molecules per mole)

Evaluating this expression, we get:

Number of moles of carbon dioxide = 0.983 moles

Answer:

decreases

Explanation:

Melting is the process of turning solid materials into liquids by introducing heat. If the mass of a stick of butter decreases then no mass was created when it melted.

Melting is the process of a solid changing from a solid to a liquid when heated to a specific temperature. The set temperature at which a solid begins to transform into a liquid is known as the melting point.

A substance will change from a solid to a liquid when the temperature is raised to its melting point. since of this, the substance's volume will grow since its molecules will be spaced more apart.

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The rate of effusion of Argon here is 8.03 min

Data;

This law states that the rate of effusion of a gas is inversely proportional to the square root of it's molar mass.

\(R \alpha \frac{1}{\sqrt{M} }\)

From this,

\(\frac{r_1}{r_2} = \frac{\sqrt{M_2} }{M_1}\)

substituting the values and solving,

\(\frac{R_A_r}{12.7}= \frac{\sqrt{16} }{\sqrt{40} } \\ R_A_r = \frac{12.7*\sqrt{16} }{\sqrt{40} } \\R_A_r = 8.032min\)

The rate of effusion of Argon here is 8.03 min

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In reality, Marina observed that the independent auditor Ulisses does not have an established link with the organization, therefore, situations II and III, regarding the loan by the auditor or even the charging of differentiated fees, did not exist, being one punctual activity carried out by the same, not the establishment of a partnership for example. Only the first alternative is correct.

to identify the activity of the base professional is to understand the role of Ulisses, that is, without a direct relationship between the parties, the auditor aimed to carry out adequate control over the activities, seeking to order a series of functions, in addition to an expanded action for carrying out the work.

Completing:

I. Marina analyzed that the Independent Auditor Ulisses Celestino de Goés does not have any type of financial relationship with the audited organization. Marina concluded that in this situation Auditor Ulisses Celestino de Goés was Independent.

II. Marina analyzed that the Independent Auditor Ulisses Celestino de Goés was auditing a Financial Institution in which he was requesting a loan for his company of R$ 50,000.00 (a large amount). Marina concluded that in this situation, in which Ulisses Celestino de Goés requested loans from the Audited organization, Auditor Ulisses Celestino de Goés was Independent.

III. Marina analyzed that the Independent Auditor Ulisses Celestino de Goés charged differentiated fees (a lower amount than the standard charged in other audit services). Marina concluded that in this situation, in which Ulisses Celestino de Goés charged different fees.

Answer:

methane

Explanation: methane is obtained from the decaying of flora and fauna mostlyunder damp

Answer:

1.37x10²⁵atoms of carbon

2.74x10²⁵ atoms of oxygen.

33.7g of KNO₃

Explanation:

To answer this question you must use molar mass of carbon dioxide (44g/mol) and 1 mole are 6.022x10²³atoms.

1.00kg are 1000g of CO₂. Moles are:

1000g CO₂ * (1mol / 44g) = 22.73 moles of CO₂ = 22.73 moles of carbon.

In atoms:

22.73 moles C * (6.022x10²³atoms / 1mole) = 1.37x10²⁵atoms of carbon

There are 22.73 moles of CO₂ * 2 = 45.45 moles of oxygen are present in the carbon dioxide. In atoms:

45.45 moles Oxygen * (6.022x10²³atoms / 1mole) = 2.74x10²⁵ atoms of oxygen.

1 mole of Potassium nitrate, KNO₃, contains 3 moles of oxygen. 1 mol of oxygen are:

1.00 mol O * (1mol KNO₃ / 3 moles O) = 0.33 moles of KNO₃

As molar mass of KNO₃ is 101.1g/mol:

0.33 moles of KNO₃ * (101.1g / mol) = 33.7g of KNO₃

Answer:

1. 1.37 * 10^25 atoms of carbon

2. 2.74 * 10^25 atoms of oxygen

3. 33.67g of Potassium Nitrate

Explanation:

2. Firstly, we want to know the number of atoms of oxygen in 1 kg of carbon dioxide.

Firstly, we will need to know the number of moles of carbon iv oxide in 1kg of carbon iv oxide

Mathematically;

number of moles = mass/molar mass

molar mass of carbon iv oxide is 44 g/mol

mass here is 1000g (1kg is 1000g)

So the number of moles of CO2 in 1kg of CO2 will be; 1000/44 = 22.73 moles

Now 1 mole of CO2 contains 2 atoms of oxygen, thus 1 mole of CO2 contains 2 moles of oxygen

So the number of moles of oxygen in 1kg CO2 will be 2 * 22.73 = 45.46 moles

Mathematically, 1 mole contains 6.02 * 10^23 atoms

So 45.46 moles will contain =

6.02 * 10^23 * 45.46 = 2.74 * 10^25 atoms of oxygen

1. 1 mole of co2 contains 1 atom of carbon , thus, 1 mole of CO2 will

contain 1 mole of carbon

From above, 1kg of carbon iv oxide contains 22.73 moles , thus 1kg of carbon iv oxide will contain 22.73 moles of carbon too

So the number of atoms will be 22.73 * 6.02 * 10^23 = 1.37 * 10^25 atoms

3. Mass of KNO3 that contains 1 mole of oxygen atom

From the formula of the compound, we can see that 1 mole of KNO3 contains 3 atoms of oxygen which translates to 3 moles of oxygen

So 1 mole of oxygen will translate to 1/3 mole of KNO3

Mathematically;

mass = number of moles * molar mass

Molar mass of KNO3 = 39 + 14 + 3(16) = 39 + 14 + 48 = 101 g/mol

So the mass will be = 1/3 * 101 = 33.67g

The learning activities titled "Hypothesis," "Variables and Hypothesis," and "Constructing a Hypothesis" all share certain similarities and differences. A question that arises in response to an observation is similar to a scientific research question in that both require some level of investigation to achieve an answer. However, scientific research questions are typically more specific and refined, with a defined methodology for obtaining data and verifying results.

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The gas law that is calculated with the pressure and volume variables at a constant temperature is Boyle's Law. Boyle's Law states that the pressure (P) of a gas is inversely proportional to its volume (V) when temperature (T) is held constant.

Mathematically, it is expressed as P₁V₁ = P₂V₂, where P₁ and V₁ represent the initial pressure and volume, and P₂ and V₂ represent the final pressure and volume.According to Boyle's Law, if the volume of a gas is reduced while keeping the temperature constant, the pressure will increase proportionally.

Similarly, if the volume is increased, the pressure will decrease. This relationship holds as long as the temperature remains constant throughout the process. Boyle's Law is one of the fundamental gas laws and provides insights into the behavior of gases under changing pressure and volume conditions at a constant temperature.

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Answer:

To convert joules to calories, you can use the conversion factor:

1 calorie = 4.184 joules

To find out how many calories are in 4,180 joules, divide the given value by the conversion factor:

4,180 joules / 4.184 joules per calorie = 0.9 calories (approximately)

Therefore, there are approximately 0.9 calories in 4,180 joules.

Answer: At equilibrium, the rates of the forward and reverse reactions are equal. One way to think of it is that the forward and reverse reactions are canceling each other out to produce an equilibrium.

If the rate of a reaction were zero, then the rates of the forward and reverse reactions would be constant. This is only true of the concentrations. For a reaction to reach equilibrium, there has to be some change in the rates of the forward and reverse reactions. If the rates are zero from start to end then no reaction would occur.

Remember, if the forward reaction rate was zero, then the reverse reaction rate would also have to be zero which would produce a total equilibrium that doesn't change at all. Concentrations are constant because equal moles of products from the forward reaction are being turned into reactants by the reverse reaction. This is only at equilibrium.

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The wavelength of the radiation emitted by the argon ion laser is \(4.854 * 10^-7 m\).

Wavelength is a property of any type of wave that refers to the distance between two adjacent points on the wave that is in phase, i.e., at the same point in their respective cycles. It is usually denoted by the Greek letter lambda (λ) and is measured in units of length, such as meters or nanometers.

The energy carried by the photon (E) is related to the wavelength (\(\lambda\)) through the following equation:

\(E=hc/\lambda\); where 'h' is the Plank's Constant and 'c' is the speed of light which is \(3* 10^{-7} m/s\).

We can say that

\(\lambda - hc/E\)

Now after substituting the given values, we get:

\(\lambda = (6.626 * 10^{-34} J.s * 3.00 * 10^8 m/s) / (4.071 * 10^{-19} J)\\\lambda = 4.854 * 10^-7 m\)

Therefore the wavelength of the radiation emitted by the argon ion laser is \(4.854 * 10^-7 m\).

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Explanation:

It is the emission of electron from a metal under the effect of light is known as photo electric effect

I hope this imformation help full for you

Answer:

2

Explanation:

You write your answer with the same number of significant figures as the number with the smallest amount of figures, in this case, that number is 2.1 so your answer should be written with 2 significant figures.

Answer:

Sodium Chloride has Ionic bond while Hydrogen Chloride has covalent bond.

Explanation:

Na has 11 electrons (2, 8, 1) and need to give away 1 electron to be stable

Cl has 17 electrons ( 2, 8, 7) and needs 1 electron to be stable.

Na transfers 1 electron to CL to form Ionic bond.

While

Hydrogen has 1 electron and shares with Chlorine to be stable.

Covalent bond involves sharing.

Chlorine reacts with sodium to form ionic sodium chloride while chlorine reacts with hydrogen to form covalent hydrogen chloride.

The nature of bonding between atoms depends on their relative difference in electronegativity.

Chemical bonding is the process by which atoms come together to form compounds.

There are different kinds of chemical bonds;

An ionic bond is formed when there is high electronegativity difference between the bonding atoms. Typically, this type of bond is formed when the electronegativity difference is about 2.0 and above.

For a covalent bond, an electronegativity difference of about 0.4 - 1.7 is considered a polar covalent bond. Lower values of electronegativity difference corresponds to a nonpolar bond.

The electronegativity difference between sodium and chlorine is about 2.23. This corresponds to a pure ionic bond. The compound is composed of chlorine and sodium ion pairs alternately located in a crystal lattice as shown in the image attached.

The  electronegativity difference between chlorine and hydrogen is about 0.96. This corresponds to a polar covalent bond. The negative end of the dipole points towards chlorine while the positive end of the dipole points towards hydrogen.

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The total number of moles of electrons lost by Mg(s) when 2.0 moles of electrons are gained by Ni2+(ag) is also 2.0 moles of electrons.

This is because in a chemical equation, the number of moles of electrons gained by the reducing agent (in this case Ni2+) is equal to the number of moles of electrons lost by the oxidizing agent (in this case Mg(s)).

In this redox reaction, Mg is being oxidized because it loses electrons and Ni is being reduced because it gains electrons. The oxidation and reduction process are occurring simultaneously, so the number of electrons lost by Mg(s) is equal to the number of electrons gained by Ni2+(ag).

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The electrons that are gained by the \(Ni^{2+}\) ion is 2.0 moles of electrons.

We know that when there is a redox reaction, there would be the loss or gain of electrons in the process. The process is a simultaneous one so the electrons that are lost by one specie must as a matter of necessity be gained by another specie.

In this case, as we look at the reaction equation we can see that there are two electrons that have been lost by the magnesium atom and these two electrons would be gained by the Nickel II ion.

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Answer: 0.125 moles F2

Explanation: 1.5x1023 atoms of F = 0.75x10^23 molecules F2

moles F2 = 0.75x10^23/avogadro number = 0.125 moles

There are 0.25 moles in 1.5 x \(10^{23}\)  atoms of fluorine.

Given,

In one mole we have,

6.02 x \(10^{23}\) atoms.

1 mole = 6.02 x \(10^{23}\) atoms

Find the number of moles in 1.5 x \(10^{23}\) atoms of fluorine.

We have,

1 mole = 6.02 x \(10^{23}\) atoms

Multiply  1.5 x \(10^{23}\) / 6.02 x \(10^{23}\) on both sides

1.5 x \(10^{23}\) / 6.02 x \(10^{23}\) x 1 mole = 1.5 x \(10^{23}\) / 6.02 x \(10^{23}\) x 6.02 x \(10^{23}\) atoms

1.5/6.02 mole = 1.5 x \(10^{23}\)  atoms

0.25 moles = 1.5 x \(10^{23}\)  atoms.

Thus there are 0.25 moles in 1.5 x \(10^{23}\)  atoms of fluorine.

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Answer:

c

Explanation:

Answer:

419 parts per million

Explanation:

The amount of carbon dioxide in Earth's atmosphere reached 419 parts per million in May, its highest level in more than four million years, the National Oceanic and Atmospheric Administration announced on Monday.

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The amount of SO₂(g) in the reaction vessel has a lower value compared to its value at the original equilibrium. Option d is correct choice.

Injecting pure O₂(g) into the reaction vessel at a constant temperature will cause the system to shift towards the right side of the equation in order to consume the added O₂. This means that the amount of SO₂(g) in the reaction vessel will decrease, while the amount of SO₃(g) and O₂(g) will increase.

Since the reaction is exothermic, adding O₂(g) will not change the equilibrium constant (Keq) of the reaction, so (A) is not affected. However, the amount of O₂(g) in the reaction vessel will increase, so (C) has a higher value compared to its value at the original equilibrium.

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--The complete question is, 2SO(g) <-> 2SO₂(g) + O₂(g)

After the eq. represented above is established, some pure O₂(g) is injected into the reaction vessel at a constant temperature. After equilibrium is reestablished, which of the following has a lower value compared to its value at the original equilibrium?

A. Keq for the reaction

B. The amount of SO₃(g) in the reaction vessel

C. The amount of O₂(g) in the reaction vessel.

D. The amount of SO₂(g) in the reaction vessel.--

An inorganic fungicide, microbiocide, and herbicide is ammonium hydroxide. It is very soluble in water and non-volatile.

Because of its extremely high solubility product, magnesium hydroxide, also known as Magnesium hydroxide, is insoluble in Ammonium hydroxide. Nevertheless, when Ammonium Chloride is present, the following reaction occurs, and the magnesium hydroxide dissolves.

Ammonia is dissolved in water to form ammonium hydroxide (Ammonium hydroxide). The substance, also known as ammonia or ammonia water, is used as a cleaner and in the production of plastics, rubber, fertiliser, and textiles. It is a clear, colourless liquid with a strong to barely detectable ammonia odour.

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Under specific temperature and pressure conditions, a gas acts as an ideal gas. Particularly, the optimal conditions for the petrol' behaviour are low pressure and high temperature.

An ideal gas is a hypothetical gas made up of numerous tiny particles moving randomly all the time. Intermolecular forces, molecular size, and volume are all presumptions that apply to ideal gases. Additionally, it is presummated that they collide in completely elastic collisions in which there is no kinetic energy loss. The ideal gas law, PV=nRT, which has P as the pressure, V as the volume, n as the number of moles, R as the gas constant, and T as the temperature, can be used to describe the behaviour of an ideal gas. This law offers a helpful model for how many actual gases behave when exposed to situations like high temperatures and low pressures.

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The variable that is not conserved during the combustion reaction of propane as shown by the equation would be none of the above.

Recall that the law of conservation says that atom/matter/mass is conserved in the course of reactions, although forms might change.

The number of moles of each atom is conserved because both the reactant and product sides have equal numbers of each atom that make up the compounds.

Unless the reaction is not carried out in an isolated system, the mass should be conserved. In other words, the total mass of the reactants must be equal to the total mass of the products. If the system is not isolated, materials may be exchanged with the surroundings and this might make the mass not to be conserved.

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Draw a structural formula for the major product of the reaction shown:

The structural formula for the major product (2-butene) of the given reaction is as follows:$$\ce{CH3CH2CH=CH2}$$

The given reaction is an acid-catalyzed dehydration reaction.

During the reaction, the hydroxyl group (OH) and the adjacent hydrogen atoms (H) on the reactant alcohol (2-butanol) undergo dehydration (loss of water) to form an alkene (2-butene) as the major product.

The reaction is shown below:$$\ce{CH3CH2CH2CH2OH + H2SO4 ->[\Delta] CH3CH2CH=CH2 + H2O}$$To draw the structural formula for the major product of the given reaction, we need to consider the following points:

1. The reactant alcohol (2-butanol) is a four-carbon alcohol with the hydroxyl group (OH) attached to the second carbon atom (C2) of the chain.

2. The product alkene (2-butene) will be a four-carbon alkene with a double bond between the second and third carbon atoms (C2 and C3) of the chain.

The other two carbon atoms will have a single bond with the adjacent carbon atoms and a hydrogen atom each attached to them.

3. The major product will be formed via the elimination of water (dehydration) between the hydroxyl group (OH) and the adjacent hydrogen atoms (H) on the second carbon atom (C2) of the reactant alcohol (2-butanol).

4. The acid catalyst (H2SO4) does not participate in the reaction and remains unchanged. It only facilitates the formation of the alkene by providing a proton (H+) to the hydroxyl group (OH) and a medium for the elimination of water.

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The reaction's chemically balanced equation is as follows:3CCl4 + 3N2 + 6H2 = 3CH4 + 3 N2Cl4

The reaction's chemically balanced equation is as follows:3CCl4 + 3N2 + 6H2 = 3CH4 + 3 N2Cl4A chemical reaction that has the same number of moles in the reactant and product sides is said to have a balanced chemical equation.

Determining that the chemical reaction is a balanced chemical equation, it follows the law of conservation of mass.

The missing image, which is included below, shows what the picture represents:

The side that reacts:

Three molecules each of CH4 and N2Cl4

The component side:

6 molecules of H2, 3 molecules each of CCl4, N2, and 3.

Consequently, the following is the reaction's balanced chemical equation:

3CCl4 + 3N2 + 6H2 = 3CH4 + 3 N2Cl4

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Answer:

m

Explanation:

Answer:

0.712 mol

Explanation:

The easiest way to do this is to use a proportion.

1 mol of copper = 63.5 grams (check this using your periodic table).

x mol of copper = 45.2 grams

1/x = 63.5 / 45.2              Cross multiply

63.5 x = 1 * 45.2              Divide by 63.5

x = 45.2/63.5

x = 0.712 mol                   Answer to 3 sig digs

Answer:

1) As you move down a group, first ionization energy decreases. WHY? Electrons are further from the nucleus and thus easier to remove the outermost one. 2) As you move across a period, first ionization energy increases.

so i think it is b

Explanation: