Chemistry High School

Need help with these chemistry quesions about mole ratios. There's an image linked to this. Please help

Answers

Answer 1

1) moles Al : moles of HCl

2 : 6

simplifying the ratio;

1 : 3

2) [tex]HCl : AlCl_{3}[/tex]

6 : 2

3 : 1

3) [tex]Al : AlCl_{3}[/tex]

2 : 2

1 : 1

4) [tex]HCl : H_{2}[/tex]

6 : 3

2 : 1

5) [tex]HCl : H_{2}[/tex]

2 : 1

6 : x

x = 6/2

x = 3 moles

6) [tex]HCl : H_{2}[/tex]

2 : 1

12 : x

x = 12/2

x = 6 moles

7) [tex]HCl : H_{2}[/tex]

2 : 1

3 : x

x = 3/2 moles

Related Questions

which elementary step has the highest energy of activation in the sn1 mechanism for the substitution reaction of (ch3)3coh with hx?multiple choice question.nucleophilic capture of the carbocationloss of h2o to form the intermediate carbocationprotonation of the alcohol

Answers

The highest energy of activation in the SN1 mechanism for the substitution reaction of (CH3)3COH with HX is nucleophilic capture of the carbocation.

During this step, a nucleophile (such as HX) attacks the positive charge on the carbocation, forming a new bond and breaking an existing bond.

This transition state has a higher energy of activation than the other steps in the reaction because it requires the greatest reorganization of the electron density.

Protonation of the alcohol has the second highest energy of activation. This step involves the nucleophile donating a proton to the alcohol, forming an oxonium ion.

This step requires an intermediate and is energetically favorable because the oxygen lone pair donates electron density to the carbon, stabilizing the charge.

Finally, the loss of H2O to form the intermediate carbocation is the lowest energy of activation. This step involves breaking the bond between the oxygen and the hydrogen, releasing water in the process.

This is energetically favorable because the carbocation is more stable than the alcohol.

In conclusion, the highest energy of activation in the SN1 mechanism for the substitution reaction of (CH3)3COH with HX is nucleophilic capture of the carbocation.

to know more about carbocation refer here:

https://brainly.com/question/19168427#

#SPJ11

in both parts of the activity, you conducted a second trial without having to remix the chemicals. how was this possible?

Answers

As long as the same amount of chemicals and the same reaction conditions are used, the reaction should proceed in the same way, resulting in the same products and reactions.

Therefore, repeating the experiment using the same chemicals and conditions should yield similar results without the need to remix the chemicals. This is possible because chemical reactions follow the law of conservation of mass, which states that matter cannot be created or destroyed, only rearranged.

What is law of conservation?

The law of conservation of mass, also known as the principle of mass conservation, states that the total mass of a closed system (in a chemical reaction or physical change) remains constant, regardless of the processes or transformations that occur within the system. In other words, matter cannot be created or destroyed, only transformed or rearranged in a chemical reaction or physical change. This law is a fundamental principle of chemistry and is widely used in chemical calculations and experiments.

To know more about chemicals, visit:

https://brainly.com/question/30970962

#SPJ1

49.2 ml of a 0.524 m solution of hno3 is titrated with fe(oh)3. it takes 85 ml of fe(oh)3 to reach the equivalence point. what is the concentration (molarity) of the fe(oh)3? answer to 2 decimal places

Answers

The Fe(OH)₃ solution has a content of 0.304 M.

In this titration, HNO₃ is the acid and Fe(OH)₃ is the base. At the equivalence point, all the H+ ions from the HNO₃ react with all the OH- ions from the Fe(OH)₃ to form water and the salt, Fe(NO₃)₃. We can use the balanced chemical equation for the reaction to determine the stoichiometric ratio of HNO₃ to Fe(OH)₃ and calculate the molarity of Fe(OH)₃.

The balanced chemical equation for the reaction is:

HNO₃ + 3Fe(OH)₃ → Fe(NO₃)₃ + 3H₂O

From the equation, we see that 1 mole of HNO₃ reacts with 3 moles of Fe(OH)₃. Therefore, the number of moles of HNO₃ in the solution can be calculated as:

moles of HNO₃ = Molarity of HNO₃ x Volume of HNO₃ solution in liters

moles of HNO₃ = 0.524 M x (49.2 mL / 1000 mL/L)

moles of HNO₃ = 0.0258 mol

At the equivalence point, the number of moles of Fe(OH)₃ added is equal to the number of moles of HNO₃ in the solution. Therefore, we can calculate the molarity of Fe(OH)₃ as:

Molarity of Fe(OH)₃ = moles of Fe(OH)₃ added / Volume of Fe(OH)₃ solution in liters

Since the volume of the Fe(OH)₃ solution added is 85 mL, or 0.085 L, we can calculate the moles of Fe(OH)₃ as:

moles of Fe(OH)₃ = moles of HNO₃ = 0.0258 mol

Therefore, the molarity of Fe(OH)₃ is

Molarity of Fe(OH)₃ = 0.0258 mol / 0.085 L

Molarity of Fe(OH)₃ = 0.304 M

Thus, the concentration (molarity) of the Fe(OH)₃ solution is 0.304 M, rounded to two decimal places.

To learn more about concentration refer to:

brainly.com/question/10725862

#SPJ4

exposing a molecule to ir radiation causes what molecular change? electron ejection electron excitation vibrational excitation change of nuclear spin rotation of bonds

Answers

When a molecule is exposed to infrared radiation, the molecular change is c. a vibrational excitation.

Infrared radiation is a type of electromagnetic radiation that has a wavelength longer than visible light but shorter than microwaves. It is also known as heat radiation since it produces heat upon exposure to matter. Infrared radiation is used in various fields such as astronomy, meteorology, physics, and chemistry. It can detect celestial objects, measure temperature and atmospheric conditions, and identify molecular structures in chemistry.

Molecules absorb infrared radiation when the frequency of the radiation matches the natural vibration frequency of the molecule. The energy from the IR radiation is absorbed by the molecule's vibrational motion, leading to a change in the molecule's vibrational state.The absorbed energy causes the bonds in the molecule to stretch, contract, or bend. This energy can break the bonds, rearrange the atoms, or create new bonds, which leads to chemical changes in the molecule. Vibrational excitation is a common way to study molecular structure and function.

Summary, when a molecule is exposed to infrared radiation, it undergoes a vibrational excitation. Infrared radiation is a type of electromagnetic radiation that has a longer wavelength than visible light but shorter than microwaves. Molecules absorb infrared radiation when the frequency of the radiation matches the natural vibration frequency of the molecule.

Learn more about electromagnetic at:

https://brainly.com/question/29318543

#SPJ11

a solution is made by dissolving 8424 mg of sodium chloride, nacl, in 0.1711 kg of water. what is the concentration in parts per billion?

Answers

The concentration of sodium chloride (NaCl) in the solution is 840,000 parts per billion (ppb).

To calculate this, divide the mass of sodium chloride (8424 mg) by the mass of water (0.1711 kg), then multiply the result by 1 billion (10^9).

To calculate the concentration of a solution, you must first determine the mass of the solute (NaCl in this case). The mass of the solute is given in the question as 8424 mg.

The mass of the solvent (water) is given as 0.1711 kg.

To calculate the concentration of the solution, divide the mass of the solute by the mass of the solvent, and then multiply the result by 1 billion (10^9).

In this example, 8424 mg divided by 0.1711 kg is equal to 49,336,297, which multiplied by 1 billion is equal to 49,336,297,000,000, or 840,000 parts per billion (ppb).

To know more about parts per billion click on below link:

https://brainly.com/question/13251096#

#SPJ11

which type of chemical reaction occurs when natural gas is burned?(1 point) responses exothermic exothermic endothermic endothermic replacement replacement decomposition

Answers

The type of chemical reaction that occurs when natural gas is burned is exothermic.

A chemical reaction is a process that leads to the formation of a new substance. During a chemical reaction, the atoms of the original substance are rearranged to create new molecules or compounds. In this process, the bonds between atoms break apart and reform, leading to the creation of new substances. Natural gas is a fossil fuel that is used to generate electricity, heat homes and buildings, and fuel vehicles. It is a hydrocarbon gas that is primarily composed of methane. It is a widely used source of energy due to its abundance, low cost, and relatively low environmental impact. An exothermic reaction is a type of chemical reaction that releases energy in the form of heat or light. During this reaction, the products of the reaction have less energy than the reactants. This energy is released into the surroundings as heat or light. The combustion of natural gas is an exothermic reaction. When natural gas is burned, it reacts with oxygen to produce carbon dioxide, water vapor, and energy. The reaction is exothermic because the energy of the products is less than the energy of the reactants, and the difference in energy is released as heat into the surroundings.

Learn more about exothermic reaction: https://brainly.com/question/31025398

#SPJ11

The Quantum Theory Model seems to contradict one the above scientist's hypothesis. Who is it and why? Is there more than one?

Answers

Answer:

Multiple scientists, including Albert Einstein, David Bohm, John Bell, and Roger Penrose, have challenged certain aspects of quantum theory due to differing views about particle behavior, hidden variables, and consciousness. Despite the challenges, quantum theory remains widely accepted as one of the most accurate and well-tested frameworks in modern physics.

which is the best colored indicator to use in the titration of 0.1 m ch3cooh(aq) with naoh(aq)? why? look up ka values in the appendix. indicator pka bromocresol green 4.8 bromothymol blue 6.8 phenolphthalein 9.2 group of answer choices