Consider the balanced equation. N2 + 3H2 Right arrow. 2NH3 What is the percent yield of NH3 if the reaction of 26.3 g of H2 produces 79.0 g of NH3? Use Percent yield equals StartFraction actual yield over theoretical yield EndFraction times 100.. 17.8% 33.3% 35.7% 53.4%

Answer:

atom

Explanation:

Answer:

hmm suspicious

lol I don't know bye

The cultures of prehistoric humans are primarily known through the excavation of stone tools and other durable artifacts, such as the Oldowan and Acheulian tool traditions.

Stone tools and imperishable artifacts serve as key archaeological evidence for understanding prehistoric cultures. Through meticulous excavation and analysis, archaeologists have been able to piece together the lifestyles, technological advancements, and social behaviors of early human societies. The term "paleolithic" refers to the Old Stone Age, a time when humans relied on stone tools as their primary implements.

The Oldowan tool tradition is considered the earliest stone tool industry, dating back around 2.6 million years ago. It is characterized by simple tools, such as choppers and scrapers, which were crafted by flaking off pieces from larger stones. These tools were primarily used for basic activities like butchering and processing animal carcasses.

Later, the Acheulian tool tradition emerged around 1.76 million years ago, representing an advancement in stone tool technology. Acheulian tools, such as handaxes and cleavers, were more refined and standardized, showcasing an increased level of sophistication in tool-making techniques. These tools served a wide range of purposes, including hunting, woodworking, and shaping raw materials.

By studying the Oldowan and Acheulian tool traditions, researchers gain valuable insights into the cognitive abilities, cultural development, and technological progress of early humans. The examination of these artifacts provides evidence of their adaptability, problem-solving skills, and the gradual refinement of their tool-making techniques over time.

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River samples may evidence problems with the water treatment plant because it may contain an excessive amount of certain substances which are filtered during this procedure.

A water treatment plant is a place where wastewater from a city is processed and purified in order to obtain potable water.

Water treatment procedure generally involves the collection, chemical substance addition, filtration, and disinfection.

Any type of problem in these steps can be evidenced by taking a sample of the water after treatment.

In conclusion, river samples evidence problems due to an excessive amount of certain substances which are filtered during this procedure.

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The substance that has a Lewis formula incorporating a double bond is sulfur dioxide (SO2).

The Lewis formula, also known as Lewis dot structure or electron dot structure, is a way to represent the valence electrons in an atom or molecule. In this case, we are looking for a substance that contains a double bond in its Lewis formula.

Out of the options given, sulfur dioxide (SO2) is the substance that fits this criterion. In the Lewis structure of SO2, sulfur (S) is bonded to two oxygen (O) atoms. The sulfur atom forms a double bond with one of the oxygen atoms, and a single bond with the other oxygen atom. The double bond is represented by two lines or two pairs of electrons between the sulfur and oxygen atoms.

To summarize, the substance with a Lewis formula incorporating a double bond is sulfur dioxide (SO2).

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The substance that has a Lewis formula incorporating a double bond is sulfur dioxide (SO2).

The Lewis formula, also known as Lewis dot structure or electron dot structure, is a way to represent the valence electrons in an atom or molecule. In this case, we are looking for a substance that contains a double bond in its Lewis formula.

Out of the options given, sulfur dioxide (SO2) is the substance that fits this criterion. In the Lewis structure of SO2, sulfur (S) is bonded to two oxygen (O) atoms. The sulfur atom forms a double bond with one of the oxygen atoms, and a single bond with the other oxygen atom. The double bond is represented by two lines or two pairs of electrons between the sulfur and oxygen atoms.

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The two unique common elementary steps in the above mechanism are nucleophilic elimination and nucleophilic addition.

As we can see in the first step of the reaction (reaction attached) iodine (I) is attached to the compound. As we know that iodine is a good leaving group so it leaves easily with electrons. As it takes the bond electrons and becomes I⁻ so it is a nucleophilic elimination reaction.

In the second step of the reaction, the lone pair of electrons of nitrogen are attacking the carbocation, so we can call it a nucleophilic addition reaction. So the first step is nucleophilic elimination and the second step is nucleophilic addition.

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Answer:

26.2g = Mass of water in the calorimeter

Explanation:

The heat absorbed for the water is equal to the heat released for the metal. Based on the equation:

Q = m*C*ΔT

Where Q is heat, m is the mass of the sample, C is specific heat of the material and ΔT is change in temperature

Replacing we can write:

\(m_{metal}*C_{metal}*dT_{metal}=m_{water}*C_{water}*dT_{water}\)

13.9g * 0.449J/g°C * (54.2°C-15.6°C) = m(H₂O) * 4.184J/g°C * (15.6°C-13.4°C)

240.9J = m(H₂O) * 9.2J/g

Answer:

Autotrophic or Producers

Explanation:

They are often called producers because they make their own food.

The correct ranking of compounds in order of increasing keq for this equilibrium is Acetone < Propanone < Benzaldehyde.

The correct ranking of compounds in order of increasing keq for the equilibrium of each of the carbonyl compounds with HCN to produce cyanohydrins is

Acetone < Propanone < Benzaldehyde.

In the above reaction, the cyanide ion acts as a nucleophile and attacks the carbonyl carbon atom in the carbonyl compound to form an intermediate compound. Then the intermediate compound formed by the reaction between HCN and the carbonyl compound undergoes an intramolecular rearrangement to form cyanohydrin.Based on the stability of intermediate compound formed, the order of increasing stability is as follows:

Acetone < Propanone < Benzaldehyde.

Since the keq is directly proportional to the stability of the intermediate, the order of increasing keq for the equilibrium of each of the carbonyl compounds with HCN to produce cyanohydrins is

Acetone < Propanone < Benzaldehyde.

The correct ranking of compounds in order of increasing keq for this equilibrium is

Acetone < Propanone < Benzaldehyde.

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The average molecular velocity of the molecules will decrease as the reaction goes to completion at a constant temperature.

What is Molecular velocity?

Molecular velocity is the average speed of molecules in a sample of matter. It is determined by the temperature of the sample, with higher temperatures resulting in higher molecular velocities.

This is because the reaction produces a single product, meaning that the number of molecules in the reaction vessel is decreasing as the reaction goes to completion. As the number of molecules decreases, the average molecular velocity of the molecules decreases as well.

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Silver is the best conductor of electricity. Its main disadvantage is that it tarnishes when exposed to air. the native mineral that is the best conductor of electricity.

The Latin argentum and Sanskrit argunas, both meaning "bright," are where the word "Ag" originates. Even in the Stone Age, silver was used. Silver use dates back at least 5000 years, according to archaeological findings. When aesthetics is crucial, it is utilised for silver dinnerware and jewellery. As the greatest known visible light reflector, silver is utilised to build mirrors, even though it tarnishes with time. Electrical connections, batteries, solder and brazing alloys, dental alloys, and other products also use it.

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Number of moles present in an aqueous solution can be determined by multiplying the concentration/molarity (in mol/L), by the volume (in L). Considering the units: mol/L × L = molL/L = mol.

Hence, moles (n) = concentration (c) × volume (V)

Therefore, n =cV = 0.65×0.150 = 0.0975 mol

Answer:

⇒ n = 2.4088 × 10²⁴

- So, the no of atoms in 4 moles of helium is 2.4088 × 10²⁴.

Explanation:

Answer:4

Explanation: I got it right

According to ideal gas law and kinetic molecular theory,the statement which describes  the characteristic of an ideal gas system is that  straight-line motion of the gas molecules is constant and random.

The ideal gas law is a equation which is applicable in a hypothetical state of an ideal gas.It is a combination of Boyle's law, Charle's law,Avogadro's law and Gay-Lussac's law . It is given as, PV=nRT where R= gas constant whose value is 8.314.The law has several limitations.

The ideal gas law was proposed by Benoit Paul Emile Clapeyron in the year 1834.He was a physicist and an engineer.It is often written in empirical form.It is called as an ideal gas  equation which is a good approximation of behavior of many gases.It has several limitations.

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The products in the equation would be  \(CO_2\), \(SO_2\), and \(H_2O\).

From the equation of the reaction:

\(CH_3SH + 4O_2 --- > CO_2 + SO_2 +2H_2O\)

The products are \(CO_2\), \(SO_2\), and \(H_2O\).

This is because, for every chemical equation, the reactants are always at the back of arrows while products are at the front of arrows. In other words, reactants are usually on the left-hand side while products are on the right-hand side.

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Answer: I don't have the ability to conduct physical experiments or obtain solutions. However, I can provide you with some general information about the properties of CoCl2.6H2O in EtOH and H2O.

Cobalt chloride hexahydrate (CoCl2.6H2O) is a crystalline solid that is soluble in both water and ethanol. When dissolved in water, it forms a pink-colored solution due to the presence of hydrated cobalt ions. In contrast, when dissolved in ethanol, it forms a blue-colored solution due to the formation of a complex between cobalt ions and ethanol molecules.

The addition of CoCl2.6H2O to water or ethanol should result in the formation of a homogenous solution with a characteristic color. The color of the solution will depend on the solvent used and the concentration of the CoCl2.6H2O solution.

Answer:

Hydrogen Bonds

Explanation:

In the case of water, hydrogen bonds form between neighboring hydrogen and oxygen atoms of adjacent water molecules. The attraction between individual water molecules creates a bond known as a hydrogen bond.

When the difference between successive Ionization Energies of a given element is exceptionally large, its electron configuration shows that the last electron is ejected from a noble gas configuration. For example, IE₂ of K has a high, and the electron is ejected from a noble gas configuration.

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The atomic radius is the distance between the nucleus and the outermost electrons in an atom.

The trend of atomic radius refers to how the size of atoms changes across a period or down a group in the periodic table.

The trend of atomic radius across a period is a decrease from left to right. This is because the number of protons and electrons in the atom increases as you move from left to right, but the number of energy levels remains the same. The increased nuclear charge attracts the electrons closer to the nucleus, resulting in a smaller atomic radius.

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Answer:

1.725e+18

Explanation:

Answer:

Niel Bohr's planetary model proposed that electrons moved around the nucleus in orbits of fixed sizes.

Answer:

The formula for nitrogen fluoride is NF3.

Explanation:

Answer:

Explanation:

One nitrogen atom and three fluorine atoms make up this poisonous and extremely reactive chemical. It is used to make fertilisers, refrigerants, and semiconductors.

88226Ra→ 86222Rn + 24He is the reaction that describes an alpha emission because radiations are released.

Alpha radiation occurs when the nucleus of an atom becomes unstable and alpha particles are released in order to restore stability. Alpha decay occurs in elements that have high atomic numbers, such as uranium, radium, and thorium etc.

So we can conclude that 88226Ra→ 86222Rn + 24He is the reaction that describes an alpha emission because radiations are released.

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Answer:

A: 88226Ra→ 86222Rn + 24He

The reaction of LDA (lithium diisopropylamide) with acetophenone produces an enolate. LDA is a strong base commonly used to deprotonate ketones, such as acetophenone, to form the corresponding enolate.

An enolate is an intermediate in many organic reactions and is formed by the removal of an alpha-hydrogen from a carbonyl compound. In this case, LDA removes the acidic alpha-hydrogen from acetophenone, resulting in the formation of the enolate. The enolate is a resonance-stabilized anion with a negatively charged oxygen and a carbon-carbon double bond. It is important to note that LDA is highly basic and can deprotonate multiple equivalents of acetophenone, leading to the formation of a mixture of enolates. However, in most cases, the major product is the mono-deprotonated enolate.

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Inactivation of the beta-2 adrenergic receptor will most likely result in an increase in the cell's rate of glycogen production.

According to Figure 1, the stimulation of glycogen breakdown and inhibition of glycogen synthesis result from the activation of beta-2-adrenergic receptors. Because glycogen synthesis is no longer hindered, the immediate result of the deactivation of beta-2-adrenergic receptors is an increase in the rate of glycogen synthesis in cells. Because glycogen phosphorylase may have been deactivated, the breakdown of glycogen in cells is no longer encouraged.

This multiple-choice query is:

A. Cyclic AMPAMP concentrations within cells will rise.

B. Protein kinase A's enzymatic activity will rise.

C. Glycogen phosphorylase will become more active.

D. The cell's rate of synthesising glycogen will quicken.

The correct option is D.

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The hospital's experimentation with peroral endoscopic myotomy (POEM) filling is part of the tertiary care position.

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Answer:

B. Is the correct answer :) i hope this helps!!

Explanation:

brainliest please?

Answer:

Para ser mas exactos una reaccion quimica es donde los reactivos se transforman en productos.

Explanation:

Durante las reacciones quimicas, ocurren ciertas transformaciones que hace que se tome o se libere energia del medio, generando que los reactivos de la reaccion, es decir los compuestos iniciales, en un determinado espacio y tiempo bajo ciertas condiciones de presion y temperatura exactas se transformen en productos.

Para la quimica, la misma cantidad de materia que se encuentra en los reactivos se mantendra en los productos, es por eso que cada reaccion quimica debe respetar las reglas de la estequiometria y estar balanceadas a la perfeccion.

Answer:

Aphelion

Explanation:

Aphelion is the point of the Earth's orbit that is farthest away from the Sun. Perihelion is the point of the Earth's orbit that is nearest to the Sun.