Which term names the process when two hydrogen atoms combine to form helium?.

4.8L of sulphur trioxide are formed when 4800 cm³ of sulphur dioxide is burned in air. Sulfur trioxide may be found in three different forms.

The chemical compound with both the formula SO\(_3\) is sulfur trioxide. It has been regarded as "unquestionably the much more commercially significant" sulfur oxide. It is manufactured on a large level as a precursor towards sulfuric acid.

Sulfur trioxide may be found in three different forms: gaseous monomer, crystalline trimer, as well as solid polymer. At little below room temperature, sulfur trioxide is indeed a solid with a rather limited liquid range. The major precursor of acid rain is gaseous SO\(_3\).

2SO\(_2\) + O\(_2\) \(\rightarrow\) 2SO\(_3\)

SO\(_2\) is the limiting reactant

Molar ratio between SO\(_2\) and SO\(_3\) which is 2:2.

1000cm³= 1L

4800cm³×1L/1000cm³= 4.8L

Therefore,  4.8L is the volume.

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The volume of the container that  that contains 24. 0 grams of N2 gas at 328K at 884 atm is found to be 2.65 Liters.

The ideal gas equation is given as, PV = nRT, where, P is pressure V is volume, n is the moles, R is the gas constant and T is the temperature.

It is given to us that 24 grams of N₂ is to be stored in the container with 884 atm pressure and 328K temperature.

Now, putting all the values in the equation to find the volume of the container,

884V = 24/28(8.34)(328)

V = 2.65 Liters,

So, the volume of the container will be 2.65 Liters.

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The question requires us to explain the differences in radii of neutral atoms, cations and anions.

To answer this question, we need to keep in mind that a neutral atom presents the same number of protons (positive particles) and electrons (negative particles). Another important information is that the protons are located in the nucleus of the atom, while the electrons are around the nucleus. Also, there is an electrostatic force between protons and electrons, which means that they the protons tend to attract the electrons to the nucleus.

While a neutral atom presents the same number of protons and electrons, a cation is an ion with positive charge, which means it has lost one or more electrons. In a cation, the balance between protons and electrons doesn't exist anymore: now, there is more positive than negative charge (more protons than electrons), and the overall attractive force that the protons have for the electrons is increased. As a result, the electrons stay closer to the nucleus and the radius of a cation is smaller than the neutral atom from which it was derived.

On the other side, anions present negative charge, which means they have received electrons. Similarly to cations, the balance between protons and electrons doesn't exist anymore, but in this case, there are more electrons than protons. In an anion, the overall attractive force that the protons have for the electrons is decreased. As a result, the electrons are "more free" to move and, as they are not so attracted to the nucleus, they tend to stay farther from the positive nucleus compared to the neutral atom - because of this, the radius of an anion is larger than the neutral atom from which it was derived.

The major product obtained when the alkyl halide undergoes an E2 reaction is (insert the product here).

In an E2 (elimination) reaction, a base removes a proton from a β-carbon, resulting in the elimination of a leaving group and the formation of a π bond. The reaction follows a concerted mechanism, meaning that the proton removal and leaving group departure occur simultaneously. The major product is determined by the stability of the resulting alkene.

To determine the major product, we need to identify the β-carbon, which is the carbon adjacent to the carbon bearing the leaving group. The base will abstract a proton from the β-carbon, causing the leaving group to depart and forming a π bond. The major product will be the most stable alkene formed from this process.

In this case, additional information is needed regarding the specific alkyl halide and the base involved to accurately predict the major product. Different alkyl halides and bases can lead to different outcomes. If no reaction is expected to occur, it means that the alkyl halide does not have a β-hydrogen or the base is unable to abstract a proton from the β-carbon, resulting in no elimination reaction.

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Calcium carbonate (\(CaCO_{3}\)), an insoluble precipitate that could be removed from water by filtration, is created when the calcium ion in hard water bonds with the carbonate ion.

Precipitates may be ionic solids that are insoluble and result from reactions between certain cations as well as anions in water. A precipitate's formation could be influenced by a variety of circumstances.

When calcium atoms gain or lose electrons, they change their charge but also reactivity, forming calcium ions.

Therefore, Calcium carbonate (\(CaCO_{3}\)), could be used to precipitate the calcium ion form a water sample

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Answer:

Explanation:

The term change of phase means the same thing as the term change of state. ... i.e. during phase change, the energy supplied is used only to separate the molecules ; no part of it is used to increase the kinetic energy of the molecules. So its temperature will not rise, since kinetic energy of molecules remains the same.

Answer: The volume of nitrogen gas at STP is 44.8 L.

Explanation:

The number of moles is defined as the ratio of the mass of a substance to its molar mass. The equation for it follows:

\(\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}\)                    ...(1)

We are given:

Given mass of \(NaN_3\) = 130.0 g

Molar mass of \(NaN_3\) = 65.01 g/mol

Using equation 1:

\(Moles of NaN_3=\frac{130.0 g}{65.01g/mol}=2mol\)

For the given chemical equation:

\(2NaN_3(s) \rightarrow 2Na(s) + 3N_2(g)\)

By the stoichiometry of the reaction:

2 moles of \(NaN_3\) produces 3 moles of nitrogen gas

At STP:

1 mole of a gas occupies 22.4 L of volume

So, 2 moles of nitrogen gas will occupy \(=\frac{22.4L}{1mol}\times 2mol=44.8L\) of volume

Hence, the volume of nitrogen gas at STP is 44.8 L.

Answer:

5.81×10²² molecules of oxygen.

Explanation:

This a reaction of decomposition:

2KClO₃ →  2KCl + 3O₂

2 moles of potassium chlorate can produce 2 moles of potassium chloride and 3 moles of oxygen.

We determine the amount of salt.

7.89 g. 1mol /122.55g = 0.0644 moles.

If 2 moles of salt, can produce 3 moles of oxygen.

0.0644 moles of salt may produce (0.0644 . 3) /2 = 0.0966 moles.

Let's count the molecules.

1 mol oxygen contains 6.02×10²³ molecules

Then, 0.0966 moles may contain (0.0966 . NA) = 5.81×10²² molecules

Answer:

Atmospheric Pressure :)

Explanation:

The mole ratio of PbO2 to water in the given chemical reaction is 1:2.

According to the balanced chemical equation, for every 1 mole of PbO2 (lead dioxide), 2 moles of H2O (water) are produced. This can be seen from the coefficients in the equation, where the stoichiometric ratio is 1:2 between PbO2 and H2O.

The balanced equation represents a redox reaction that occurs within a car battery. In this reaction, lead (Pb) and lead dioxide (PbO2) react with sulfuric acid (H2SO4) to produce lead sulfate (PbSO4) and water (H2O). The mole ratio of reactants and products is determined by the coefficients in the balanced equation.

In this case, the coefficient of PbO2 is 1, indicating that 1 mole of PbO2 is consumed. The coefficient of H2O is 2, indicating that 2 moles of H2O are produced. Therefore, the mole ratio of PbO2 to water is 1:2, meaning that for every mole of PbO2, 2 moles of water are produced as a result of the chemical reaction.

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Answer:

\(V_2=18.0L\)

Explanation:

Hello there!

In this case, according to the given information, we infer that we need the combined gas law in order to solve this problem:

\(\frac{P_2V_2}{T_2}} =\frac{P_1V_1}{T_1}}\)

Thus, by suing the temperatures in Kelvins, we can solve for the final volume as shown below:

\(V_2 =\frac{P_1V_1T_2}{T_1P_2}}\\\\V_2 =\frac{(760mmHg)(22.4L)(232K)}{(273K)(805mmHg)} \\\\V_2=18.0L\)

Regards!

The following is the reason why are feedback loops a way to see what direction our planet may be heading and how to prevent harmful changes.

What is a feedback loop?

A feedback loop is what accelerates or decelerates the trend. Our planetary system has many feedback loops to understand which direction the Earth is moving, including environmental feedback, climate feedback, and warming feedback. You can take the necessary steps to control it and see the results through a feedback loop. This will prevent harmful changes.

There are two types of loops. Positive feedback accelerates environmental deterioration, negative feedback means environmental deterioration. Global warming is a current trend in today's world where positive feedback is running, meaning that warming is increasing. Understanding feedback can help us know the direction of the planet. can.

Hence, You can prevent disasters by knowing the trend of increase and decrease. If the warming progresses, we can take the necessary steps to control it and see the results through a feedback loop. This will prevent harmful changes.

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Answer:

c. The rusting of the joints of a metal children’s swing set.

Explanation:

By definition, chemical property describes the ability of a substance to undergo a specific chemical change.

In the definition above, the key words are; "Chemical change".

Generally, chemical changes are irreversible. This means we just have t observe the options and pick the one that contains an irreversible change.

Upon doing ths, the correct option is;

c. The rusting of the joints of a metal children’s swing set.

This is because rusting is a chemical change and is irreversible.

The given statement, production associates are not allowed to view the process safety management documents. They are only for supervisors and upper management is true.

Since they provide advice on how to manage the risks and hazards connected to certain operations or processes, these documents are often written with supervisors and top management in mind. This is done to make sure the management team has the knowledge it needs to decide on process safety in an informed manner and to make sure the right safety measures are in place to safeguard employees and the neighbourhood.

It is crucial to remember that a person's unique job responsibilities and the level of access required to carry out those duties should determine who has access to PSM documents. If it's necessary for them to carry out their duties, some production associates might have access to particular PSM documents.

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The rate of consumption of Ca is 0.0833 g/s.

The rate of consumption of Ca can be determined by dividing the mass of Ca consumed (2.50 g) by the time taken for the reaction to occur (30.0 seconds). This gives us a rate of 0.0833 g/s, indicating that 0.0833 grams of Ca are consumed every second during the reaction at the given temperature.

In chemical reactions, the rate of consumption or production of a substance is typically expressed in terms of the change in concentration over time. In this case, since the mass of Ca consumed is given, we can directly calculate the rate of consumption.

It's important to note that the rate of consumption of Ca may vary with temperature and other reaction conditions. The given rate applies specifically to the given temperature and the specific reaction conditions mentioned in the problem.

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Imines are the nitrogen analogues of aldehydes and ketones, containing a C=N bond instead of a C=O bond.

They are formed through the addition of a primary amine to an aldehyde or ketone, kicking out a molecule of water (H2O) in the process.

In this post we show some examples of the synthesis of imines, walk through the mechanism for their formation, provide a few of their reactions and compare their properties to those of aldehydes and ketones.

A primary amine is added nucleophilically to the carbonyl group of an aldehyde or ketone to begin the reversible process of amine production. After that, a proton transfer creates a carbinolamine, a neutral amino alcohol. The carbinolamine oxygen is acid protonated to create a better leaving group, which is then removed as water to create an iminium ion. The ultimate imine product is produced when nitrogen is deprotonated.

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Answer:

1. Melting

2. Freezing

3. Sublimation

4. Deposition

5. Condensation

6. Evaporation

1, 3, 6 are endothermic processes

Answer:

A. two or more atoms held together with bonds make up a molecule. 

Explanation:

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Answer:

give other guy brainliest

Answer:El mercantilismo en Gran Bretaña consistió en la posición económica de que, para aumentar la riqueza, sus colonias serían proveedoras de materias primas y exportadoras de productos terminados. El mercantilismo provocó muchos actos de lesa humanidad, incluida la esclavitud y un sistema de comercio desequilibrado.

Explanation:

Answer:

minerals,organic matter,water and air

Explanation:

The basic components of soil are minerals, organic matter, water and air. The typical soil consists of approximately 45% mineral, 5% organic matter, 20-30% water, and 20-30% air. These percentages are only generalizations at best. In reality, the soil is very complex and dynamic.

The three major soap molecules produced when cottonseed oil is the source of triesters in the saponification reaction are Linoleate, Oleate, and, Palmitate.

Where, Linoleate is a salt or ester of linoleic acid.

Oleate is a salt or ester of oleic acid.

Palmitate is a salt or ester of palmitic acid.

Saponification can be defined as a “hydration reaction where free hydroxide breaks the ester bonds between the fatty acids and glycerol of a triglyceride, resulting in free fatty acids and glycerol,” which are each soluble in aqueous solutions.

Example of a Saponification reaction,

C2H5OH + CH3COOH ⇄ CH3COOC2H5 + H2O.

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According to the question the Ksp of KClO₃ at 74°C is 1.07 x 10-3 mol²/L²

Temperature is a physical property of matter that quantitatively expresses the common notions of hot and cold. It is measured by a thermometer and indicated by a numerical value on a mutually agreed-upon temperature scale such as Celsius, Fahrenheit, or Kelvin.

The Ksp of a substance is the equilibrium constant for the dissolution reaction for that substance. To calculate the Ksp of KClO₃ at 74 oC, we first need to calculate the molar concentration of KClO₃ in the solution.
Since 4.00 g of KClO₃ has a molar mass of 122.5 g/mol, the molar concentration of KClO₃ would be
c = 4.00 g/122.5 g/mol = 0.0327 mol/L
The Ksp of KClO₃ at 74 oC can then be calculated using the following equation:
Ksp = [K+] x [ClO³⁻]
where [K+] and [ClO³⁻] are the molar concentrations of the K+ and ClO3- ions, respectively.
Since KClO₃ dissociates completely into K⁺ and ClO³⁻ ions, the molar concentration of each ion is equal to the molar concentration of KClO₃, which we calculated to be 0.0327 mol/L.
Therefore, the Ksp of KClO₃ at 74 oC is
Ksp = [K⁺] x [ClO³⁻] = (0.0327 mol/L) x (0.0327 mol/L) = 0.00107089 mol²/L²
or
Ksp = 1.07 x 10-3 mol²/L²

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1. To predict which alkene will predominate at equilibrium, let us understand what the factors are that can affect the position of an equilibrium. These factors include:

The stability of the reactants and the products
The strength of the reactants and the products
The temperature
The concentration of the reactants and the products

2. We know that fumaric acid exists as a pair of stereoisomers, the trans isomer being fumaric acid, and the cis isomer being maleic acid. Both isomers can undergo addition with bromine, but the products will be different depending on the reaction conditions.

a. Syn addition:

If the addition of bromine to fumaric acid occurs via a syn addition, then the two bromine atoms will be added to the same side of the molecule. The product will be meso-2,3-dibromosuccinic acid.

b. Anti addition:

If the addition of bromine to fumaric acid occurs via an anti addition, then the two bromine atoms will be added to opposite sides of the molecule. The product will be a pair of enantiomers, meso-2,3-dibromosuccinic acid and (R,R)- or (S,S)-2,3-dibromosuccinic acid.

c. Stereorandom addition:

If the addition of bromine to fumaric acid occurs via a stereorandom addition, then the product will be a mixture of the above two products.

3. The molarity of Br_2 in the stock solution can be calculated by first finding the number of moles of Br_2 and KBr in the solution, and then dividing the moles of Br_2 by the volume of the solution in liters.

The molar mass of Br_2 is 2(79.9 g/mol) = 159.8 g/mol.

The number of moles of Br_2 is therefore:

7.75 g / 159.8 g/mol = 0.0485 mol

The molar mass of KBr is 119.0 g/mol.

The number of moles of KBr is therefore:

6.25 g / 119.0 g/mol = 0.0525 mol

The total volume of the solution is 25.00 ml = 0.02500 L.

The molarity of Br_2 in the solution is therefore:

0.0485 mol / 0.02500 L = 1.94 M

4. The isomerization of dimethyl maleate to dimethyl fumarate can potentially occur by a free radical mechanism, formation of a bromonium cation, or addition of bromine to the double bond via a carbocation to form a dibromide, followed by dehromination.

- Free radical mechanism: The reaction proceeds via a radical chain mechanism. The first step is initiation, where the bromine molecule is split into two bromine radicals. The second step is propagation, where the bromine radical adds to the double bond, creating a carbon-centered radical. The third step is another propagation step, where another bromine radical adds to the carbon-centered radical, creating a dibromide radical. The final step is termination, where two radical species combine to form a non-radical product.
- Formation of a bromonium cation: The reaction proceeds via a three-membered cyclic intermediate known as a bromonium ion. The bromine molecule approaches the double bond and forms a bridged intermediate. The bromine molecule is polarized and the carbon-carbon double bond is polarized, so the bromine atom is electrophilic and the carbon-carbon double bond is nucleophilic. The bromine atom forms a bond with one of the carbon atoms, and the other bromine atom takes a pair of electrons from the other carbon atom, forming a cyclic intermediate. The intermediate is then attacked by a nucleophile, such as water, to form the product.
- Addition of bromine to the double bond via a carbocation to form a dibromide, followed by dehromination: The reaction proceeds via the addition of a bromine molecule to the double bond, creating a carbocation. The carbocation then reacts with another bromine molecule, creating a dibromide. The dibromide can then be dehalogenated by a reducing agent, such as zinc dust or sodium hydrogensulfite, to form the product.

5. Dimethyl maleate would be expected to have a higher Rf value on TLC because it is less polar than dimethyl fumarate. The Rf value is a measure of how far a compound travels on a TLC plate relative to the distance traveled by the solvent front. The more polar a compound is, the more it will interact with the polar stationary phase on the TLC plate, and the less it will move up the plate with the solvent front. Since dimethyl maleate is less polar than dimethyl fumarate, it will move further up the TLC plate with the solvent front, giving it a higher Rf value.

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Answer:

Paper Chromatography

Explanation:

Most leaves are green due to chlorophyll pigments of different types like chlorophyll A, chlorophyll B, etc. All these pigments will be seperated according to their molecular composition. So, the correct option is 'Paper Chromatography'.

Answer:

b

Explanation:

Answer:

ita b

Explanation:

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