Aqua regia, a mixture of HCl and HNO₃, has been used since alchemical times to dissolve many metals, including gold. Its orange color is due to the presence of nitrosyl chloride. Consider this one-step reaction for the formation of this compound:NO(g) + Cl₂(g) → NOCl (g) + Cl(g) ΔH° = 83KJ(b) Calculate Ea(rev) .
Answers
Aqua regia is an oxidative mixture that is highly corrosive and is composed of hydrochloric acid and nitric acid. The Ea (rev) for the reaction is 3 kJ.
What is activation energy?The activation energy is the minimum required energy by the reactant to undergo changes to form the product. The activation energy of the reverse reaction is given by the difference in the production state and transition state.
It is given as,
Ea (rev) = Ea (fwd) − ΔHrxn
Given,
ΔH° = 83KJ
Ea (fwd) = 86 kJ/mol
Substituting the values above as:
Ea (rev) = 86 - 83
= 3 kJ
Therefore, the activation energy of the reverse reaction is 3 kJ.
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Related Questions
Do number 5 vote you brainlest thanks
Answers
Answer:
DNA
Explanation:
because genetics come from DNA
1. Which of the following best describes the relationship
between cells and living things in general? *
O A The larger the living thing, the larger are its cells.
O B All living things are made up of one or more cells.
O c The number of cells in all living things is the same.
O D There is one kind of cell of which all living things are made.
Answers
pyo- (py/o/rrhea; pyo/genic) means:
Answers
The term "pyo-" (py/o/rrhea; pyo/genic) means "pus" or "related to pus."
What is the term "pyo-" (py/o/rrhea; pyo/genic)?The prefix "pyo-" is derived from the Greek word "pyon," which means pus. When used as a prefix in medical terminology, "pyo-" indicates a condition or process related to pus or the presence of pus.
For example, "pyorrhea" refers to a condition characterized by the discharge of pus from a wound or an infection of the gums. In this case, the term combines "pyo-" (meaning pus) and "-rrhea" (meaning discharge or flow).
Similarly, "pyogenic" refers to something that causes or is related to the production of pus. It is often used to describe bacteria or microorganisms that can lead to the formation of pus in infected tissues.
In summary, the prefix "pyo-" in medical terminology denotes pus or the involvement of pus in a specific condition, indicating a discharge, infection, or pus-forming process.
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Question 6 of 1010 PointsAnimals breathe oxygen and release carbon dioxide during cellular respiration according to the equation below. How much oxygen is needed to produce 120 grams' ofcarbon dioxide?C₂H12O6 + 602 6CO₂ + 6H₂O
Answers
In this question, we have the following reaction, which is the cellular respiration reaction:
C6H12O6 + 6 O2 --> 6 CO2 + 6 H2O
We have:
120 grams of CO2 being produced
The molar ratio between CO2 and O2 is 6:6, which means the same amount of moles produced of CO2 will be the same amount used of O2
Now we find the number of moles of CO2, using its molar mass = 44.01g/mol
44.01 grams = 1 mol
120 grams = x moles
44.01x = 120
x = 120/44.01
x = 2.73 moles of CO2
If we have 2.73 moles of CO2, we will also have 2.73 moles of O2, and to find its mass, we will also use the molar mass of O2 = 32g/mol
32 grams = 1 mol
x grams = 2.73 moles
x = 2.73 * 32
x = 87.4 grams of O2
The amount required of oxygen gas to produce 120 grams of CO2 based on the cellular respiration reaction will be 87.4 grams
What are 2 extensive physical properties of water?
Answers
Explanation:
surface tension and heat of vaporization
which empirical gas law describes the relationship between the volume and temperature of a gas when the number of moles and pressure are constant? please choose the correct answer from the following choices, and then select the submit answer button. answer choices
Answers
Charles's Law helps us understand the relationship between temperature and volume of a gas when other factors, such as pressure and number of moles, remain constant. The empirical gas law that describes the relationship between the volume and temperature of a gas when the number of moles and pressure are constant is Charles's Law.
This can be expressed mathematically as: V₁/T₁ = V₂/T₂
Where V₁ and V₂ represent the initial and final volumes of the gas, and T₁ and T₂ represent the initial and final temperatures of the gas, respectively. The relationship can also be stated as: V/T = constant
To illustrate this law, let's consider an example. Imagine a balloon filled with a fixed number of moles of gas at a constant pressure. If we were to heat the balloon by placing it in a warm environment, the temperature of the gas inside the balloon would increase.
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Is mowing the lawn a physical change or a chemical change?
Answers
Answer:
Physical change
Explanation:
The only change is in the shape, or length in this case, of the object. So its chemical makeup is still the same, it's still grass.
Mowing the lawn is considered a physical change. A physical change is a change in the physical properties of a substance or material without altering its chemical composition.
A physical change is a transformation that alters the physical properties of a substance, such as size, shape, or phase, without changing its chemical composition. In the case of mowing the lawn, the grass is physically cut into smaller pieces, but the individual grass blades themselves remain chemically unchanged.
When you run a lawnmower over a lawn, the sharp blades of the mower cut through the grass, trimming it to a desired height. This action changes the appearance and size of the grass, but it does not alter the identity or chemical composition of the grass. The grass blades are still composed of the same materials, such as cellulose and other organic compounds.
When you mow the lawn, you are cutting the grass blades into smaller pieces, but the grass itself remains the same chemically. The process of mowing only affects the physical appearance and size of the grass, not its fundamental composition.
Therefore, mowing the lawn is considered a physical change.
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How many moles of a gas would occupy 22.4 Liters at 273 K and 1 atm?
Answers
Answer:
1 mole of a gas would occupy 22.4 Liters at 273 K and 1 atm
Explanation:
An ideal gas is a set of atoms or molecules that move freely without interactions. The pressure exerted by the gas is due to the collisions of the molecules with the walls of the container. The ideal gas behavior is at low pressures, that is, at the limit of zero density. At high pressures the molecules interact and intermolecular forces cause the gas to deviate from ideality.
An ideal gas is characterized by three state variables: absolute pressure (P), volume (V), and absolute temperature (T). The relationship between them constitutes the ideal gas law, an equation that relates the three variables if the amount of substance, number of moles n, remains constant and where R is the molar constant of the gases:
P * V = n * R * T
In this case:
P= 1 atmV= 22.4 Ln= ?R= 0.082 \(\frac{atm*L}{mol*K}\)T=273 KReemplacing:
1 atm* 22.4 L= n* 0.082 \(\frac{atm*L}{mol*K}\) *273 K
Solving:
\(n=\frac{1 atm* 22.4 L}{0.082 \frac{atm*L}{mol*K} *273 K}\)
n= 1 mol
Another way to get the same result is by taking the STP conditions into account.
The STP conditions refer to the standard temperature and pressure. Pressure values at 1 atmosphere and temperature at 0 ° C (or 273 K) are used and are reference values for gases. And in these conditions 1 mole of any gas occupies an approximate volume of 22.4 liters.
1 mole of a gas would occupy 22.4 Liters at 273 K and 1 atm
1.In class, students learned that a cart will move when a force of 50 N or greater is applied. A student pushed on the cart with a force of 10 N. The cart did not move. Why not?
2. Student A pushed on the cart with a force of 500 N. Student B pushed on the other side of the cart. The cart did not move. How much force did student B apply? Explain how you know.
3. 3. Student A pushed on the cart with a force of 400 N. Student C pushed on the other side of the cart. The cart rolled to the left. Did student C apply more, less, or the same force as student A? Explain how you know.
Yo help me this is due in 15 mins
Answers
What is the answer ?
Answers
Answer: Its not popping up for me *-*?
For biomass, solar, coal, natural gas, oil, and geothermal energy, identify each energy resource as renewable or non-renewable.
Answers
Answer:
There are nine major kinds of natural resources found on the planet Earth, and all these nine major resources come under two categories, that is, renewable and nonrenewable. The renewable resources refer to the resources that get regenerated again and again over a short time duration. These include five major resources, that is, wind, solar, hydro, geothermal, and biomass.
On the other hand, nonrenewable energy resources are the ones that are present in a very limited amount, as it takes a very long time to regenerate again. The general kinds of nonrenewable energy resources are nuclear, coal, oil, and natural gas.
Hence, biomass, solar, and geothermal energy comes under the renewable resources category, and coal, natural gas, and oil come under renewable resources category.
Answer: the verified answer from an expert.
Explanation:
Warmth, moisture, pH levels and oxygen levels are the four big physical and chemical factors affecting microbial growth. In most buildings, warmth and moisture are the biggest overall issues present. Dampness is a big player in the growth of fungi. Just like any living thing, water is essential to the life of microbes.
Answers
Warmth and mοisture are indeed the primary factοrs that cοntribute tο micrοbial grοwth in mοst buildings.
What is called mοisture?The humidity in the atmοsphere is called mοisture. The prοpοrtiοn οf mοisture in the atmοsphere depends οn the temperature. Air with higher temperature hοlds a greater amοunt οf mοisture.
Dampness, in particular, creates a favοrable envirοnment fοr fungi tο thrive. Micrοbes, like all living οrganisms, require water tο survive and carry οut their metabοlic prοcesses.
In additiοn tο warmth and mοisture, pH levels and οxygen levels alsο play significant rοles in micrοbial grοwth. Different micrοοrganisms have different pH preferences, and extreme pH cοnditiοns can inhibit their grοwth. Similarly, οxygen availability οr the absence thereοf can determine the types οf micrοbes that can thrive in a given envirοnment.
Understanding these physical and chemical factοrs is crucial fοr managing micrοbial grοwth in buildings, as cοntrοlling mοisture levels and maintaining apprοpriate cοnditiοns can help prevent the prοliferatiοn οf harmful micrοοrganisms and minimize pοtential health risks.
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Derek needs a tool that delivers 5.00 ml of a sodium hydroxide solution. which tool would be best for him to use? a beaker a pipette a graduated cylinder an erlenmeyer flask
Answers
Because 5.00 mL is a small amount, the best tool he could use is a pipette.
What is a pipette?Pipette or sometimes spelled as pipet can be used to transport liquid samples. It is made out of glass or plastic and can is usually used to transfer measured volumes of liquid from one container to another.
Before the pipette was invented, scientists used to use straws and they would suck in the samples carefully.
Hence 5.00 mL is a small amount, the best tool he could use is a pipette.
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To neutralize the acid in 10.0 mL of 18.0 M H2SO4 that was accidentally spilled on a laboratory bench top, solid sodium bicarbonate was used. The container of sodium
bicarbonate was known to weigh 155.0 g before this use and out of curiosity its mass was measured as 144.5 g afterwards. The reaction that neutralizes sulfuric acid this way is as follows: H2SO4 + 2 NaHCO3 ---> Na2SO4 + 2 CO2 + 2 H2O
Was sufficient sodium bicarbonate used? Calculate the limiting reactant and the maximum yield in grams of sodium sulphate.
Answers
Answer:
Explanation:
The first step is to determine the amount of H2SO4 that was spilled:
moles of H2SO4 = concentration x volume
= 18.0 mol/L x 0.0100 L
= 0.180 mol
Next, we need to determine which reactant is limiting. To do this, we can compare the amount of moles of H2SO4 with the amount of moles of NaHCO3 that would be needed to completely neutralize it. From the balanced equation, we know that 1 mole of H2SO4 reacts with 2 moles of NaHCO3:
moles of NaHCO3 needed = 2 x moles of H2SO4
= 2 x 0.180 mol
= 0.360 mol
The mass of sodium bicarbonate used is the difference between the initial mass and the final mass:
mass of NaHCO3 used = 155.0 g - 144.5 g
= 10.5 g
We can convert the mass of NaHCO3 used to moles:
moles of NaHCO3 used = mass / molar mass
= 10.5 g / 84.01 g/mol
= 0.125 mol
Since we have more moles of H2SO4 than moles of NaHCO3 needed, the limiting reactant is NaHCO3. This means that H2SO4 is in excess.
To determine the maximum yield of Na2SO4, we need to calculate the theoretical yield based on the limiting reactant:
moles of Na2SO4 = 1/2 x moles of NaHCO3 used
= 1/2 x 0.125 mol
= 0.0625 mol
mass of Na2SO4 = moles x molar mass
= 0.0625 mol x 142.04 g/mol
= 8.88 g
Therefore, the maximum yield of Na2SO4 that can be obtained is 8.88 g. Since the actual amount of NaHCO3 used is less than what is needed to completely react with the H2SO4, we can conclude that not enough sodium bicarbonate was used.
which of the pairs of atoms is most likely to form a covalent compound?
A. C, 0
B. Mg, Br
C. Na, O
D. Ba, Cl
Answers
Answer: C, 0
Explanation: just a mere guess
When CH4(g) reacts with H2O(g) to form H2(g) and CO(g), 206 kJ of energy are absorbed for each mole of CH4(g) that reacts. Write a balanced thermochemical equation for the reaction with an energy term in kJ as part of the equation. 2))When CH4(g) reacts with O2(g) to form CO2(g) and H2O(g), 802 kJ of energy are evolved for each mole of CH4(g) that reacts. Write a balanced thermochemical equation for the reaction with an energy term in kJ as part of the equation. 3)))When H2(g) reacts with O2(g) to form H2O(g), 242 kJ of energy are evolved for each mole of H2(g) that reacts. Write a balanced thermochemical equation for the reaction with an energy term in kJ as part of the equation.
Answers
The 206 kJ of energy is absorbed for each mole of CH4(g) that reacts. This means that the reaction is endothermic.
Therefore, the balanced thermochemical equation is as follows.
\(CH4(g) + H2O(g) → H2(g) + CO(g)ΔH\)
= \(+ 206 kJ\) (Energy is absorbed)2)
\(CH4(g) + O2(g) → CO2(g) + H2O(g)\)
And,
802 kJ of energy is evolved for each mole of CH4(g) that reacts. This means that the reaction is exothermic.
Therefore, the balanced thermochemical equation is as follows.
\(CH4(g) + 2O2(g) → CO2(g) + 2H2O(g)ΔH\)
= - 802 kJ (Energy is evolved)3) Given reaction is;
\(H2(g) + O2(g) → H2O(g)\)
And, 242 kJ of energy is evolved for each mole of H2(g) that reacts. This means that the reaction is exothermic. Therefore, the balanced thermochemical equation is as follows.
\(H2(g) + 1/2 O2(g) → H2O(g)ΔH\)
= \(- 242 kJ\)(Energy is evolved)
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Solution of 0. 10 M silver nitrate, AgNO3, is added to a solution of 0. 10 M lithium hydroxide, LiOH. The Ksp of silver hydroxide is 2. 0 x 10-8. What happens to the pH as the silver nitrate is added, AgNO3
Answers
The pH remains unchanged as silver nitrate is added because the reaction between silver nitrate and lithium hydroxide does not involve the release or consumption of protons (H+ ions).
When silver nitrate (AgNO3) is added to lithium hydroxide (LiOH), a precipitation reaction occurs, forming silver hydroxide (AgOH) and lithium nitrate (LiNO3). The balanced equation for the reaction is:
2AgNO3 + 2LiOH -> Ag2OH + 2LiNO3
Since the Ksp (solubility product constant) of silver hydroxide is given as 2.0 x 10^-8, it indicates that silver hydroxide is only slightly soluble in water. As a result, most of the silver hydroxide formed will precipitate out of solution.
The pH of a solution is determined by the concentration of H+ ions. In this reaction, there is no consumption or production of H+ ions. Lithium hydroxide is a strong base that completely dissociates in water, but it does not affect the pH significantly as the concentration is low (0.10 M). Silver nitrate is a neutral salt, so it also does not contribute to any pH changes.
Therefore, the addition of silver nitrate does not have any significant impact on the pH of the solution. The pH remains unchanged throughout the reaction.
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why does the hydrogen gas need to flow continuously for a while before starting the heating process?
Answers
In the laboratory, hydrogen gas is used as fuel for various purposes, including heating. In order to start the heating process, it is necessary to allow the hydrogen gas to flow continuously for a while. This is because there may be air or other gases present in the hydrogen gas pipeline that can affect the heating process.
When the hydrogen gas is allowed to flow continuously for a while, the air or other gases are purged from the pipeline, which improves the quality of the hydrogen gas. This ensures that there is no interference with the heating process, which could otherwise lead to inaccurate results.The continuous flow of hydrogen gas is essential because if it is not allowed to flow for a while, air or other gases can cause damage to the burner or other equipment used for heating. The air or other gases can cause an explosion, which can result in severe injury or death.In conclusion, the hydrogen gas needs to flow continuously for a while before starting the heating process to remove any air or other gases from the pipeline. This improves the quality of the hydrogen gas, ensures accurate results, and prevents damage to the equipment. It is important to follow safety protocols when using hydrogen gas to prevent any accidents.For such more question on heating process
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El hipoclorito de sodio (NaClO), es vendido en una solución clara de ligero color verde-amarillento y un olor característico que se conoce con el nombre genérico Límpido, con una concentración del 6%. Pero para la desinfección de superficies el Límpido, debe ser diluido al 0,5%. Cuánto Límpido debemos sacar del recipiente para obtener 200 ml de una solución al 0,5%.
Answers
Respuesta:
16,7 mL
Explicación:
Paso 1: Información provista
Concentración inicial (C₁): 6%Volumen inicial (V₁): ?Concentración final (C₂): 0,5%Volumen final (V₂): 200 mLPaso 2: Calcular el volumen de la solución concentrada
Queremos preparar una solución diluida de hipoclorito de sodio a partir de una concentrada. Podemos calcular el volumen inicial que debemos tomar usando la regla de dilución.
C₁ × V₁ = C₂ × V₂
V₁ = C₂ × V₂ / C₁
V₁ = 0,5% × 200 mL / 6% = 16,7 mL
Can someone please help me with this, ill give you a heart, a five star rating, and the brainliest answer!
Answers
Answer:
A not
B yes
C yes
D yes
Explanation:
A 2C 6H but 10O and 7O so no
B 3C 6O 2Fe on each side so yes
C 4H 1S 6O 2Na so yes
D 2Ag 2Cl 1Ca 2N 6O so yes
what do the conclusions tell about the experiments?
A) the conclusions tell what other scientists think about the experiment
B) the conclusions tell how the experiments should be repeated
C)the conclusions tell why the data support or reject the hypothesis
D) the conclusions tell if the scientific method was followed
Help Please !!!!!!!!!!!!!!!!
Answers
Answer:
C
Explanation:
APEX
the conclusions of an scientific experiment tell why the data support or reject the hypothesis. Thus option C is correct.
What is scientific experiment ?Scientific experiment involve asking different scientific questions, making hypothesis, design experiment, result and conclusion.
A good scientific experiment should have some facts which can be answered by using data analysis.
The types of scientific questions are Verification questions, Theory questions, Experimental questions
The verification question can be solved by collecting data from observation, which include characteristics or properties of a subject.
A theory question refers an imaginative exercise, is not fictional, depend on prior knowledge of the phenomenon being asking about.
The scientific question or an experimental question used to compare the element of a system when altered, it involves variables such as independent, dependent and controlled variables.
Thus option C is correct.
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Which word equation shows hydrogen reacting with oxygen to form water?
oxygen + water → hydrogen
hydrogen + oxygen → water
oxygen + water hydrogen + water
→
Ohydrogen + water →→ oxygen
Answers
Answer:
calcule o PH e POH de 2,625g de HCLO em 2000cm3 (cl=35,5)
Explanation:
The word chemical equation which hydrogen reacting with oxygen to form water is hydrogen + oxygen → water.
What is chemical equation?Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.
A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .
The first chemical equation was put forth by Jean Beguin in 1615.By making use of chemical equations the direction of reaction ,state of reactants and products can be stated. In the chemical equations even the temperature to be maintained and catalyst can be mentioned.
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How many moles of mercury(II) oxide, HgO, are needed to produce 125 g of oxygen, O2? How many moles of mercury is produced?
Laughing gas (nitrous oxide, N2O) is sometimes used as an anesthetic in dentistry. It is produced when ammonium nitrate is decomposed according to the following reaction.
NH4NO3(s) ---> N2O(g) + H2O(l) How many grams of NH4NO3 are required to produce 33.0 g N2O? and How many grams of water are produced in this reaction?
Answers
Answer: 7.81 mol HgO (How many moles of mercury(II) oxide, HgO, are needed to produce 125 g of oxygen, O2?)
Explanation:
A solution can only br made from the same amounts of solute and solvent
Answers
The statement that a solution can only be made from the same amounts of solute and solvent is not entirely accurate. While it is true that certain solutions may require a specific ratio of solute to solvent for optimal results, the concentration of a solution can vary depending on the desired outcome.
For example, a dilute solution may contain a small amount of solute relative to the amount of solvent, whereas a concentrated solution may contain a larger amount of solute in the same amount of solvent.
Additionally, the solubility of a solute can also affect the amount of solute needed to form a solution. Some solutes may have a higher solubility in a given solvent than others, meaning that less of that solute is needed to create a saturated solution.
Overall, while a certain amount of solute and solvent may be needed to form a solution, the concentration and solubility of the solute can vary and ultimately affect the amount needed to create a specific solution.
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Can someone help me please?
Answers
Answer:
I did this already
................
how long to thaw a 23 pound turkey in the refrigerator
Answers
Answer:
Like about 5-6 days in the fridge.
Explanation:
A severe systemic reaction to an allergen causing serious symptoms that develop very quickly is known as.
Answers
Answer: Anaphylaxis
Explanation:
I have a nut allergy, and this has happened to me once. The doctors also told me a lot about anaphylaxis, and I like to learn about myself.
I hope this helps!! :)
describe how minerals form
Answers
Minerals Can Be formed by Precipitation, Crystallization
Which diagram shows the correct way to represent an ionic compound of magnesium oxide?
ОА.
OB.
[Mg:0:
[Mg] [10:
[Mg]* 10:
[Mg*:07
Ос.
OD.
![Which diagram shows the correct way to represent an ionic compound of magnesium oxide?.OB.[Mg:0:[Mg]](https://i5t5.c14.e2-1.dev/h-images-qa/contents/attachments/wXKU4sszqhZVsGHV3kBmfVhr9ZMld5EF.png)
Answers
Answer:
the correct answer is D
Explanation:
D
The diagram which shows the correct way to represent the ionic compound, magnesium oxide is option D.
What is an electron dot structure?Electron dot structure is a representation of the valence electrons of an element, represented by the dots around the symbol of the element.
An ionic compound is formed by the combination of two or more ions. Note that the two ions that compose an ionic bond are held purely by electrostatic interaction of the oppositely charged ions.
The correct depiction of MgO is the arrangement in which the two ions, \(Mg^{2+}\) and \(O^{2-}\) are placed in different brackets and the oxygen ion has a complete octet as seen in option D.
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*CHEMISTRY*
*WILL GIVE BRAINEST*
What is the term for a process causing the particles contained in a substance to be packed more closely together?
coefficient of expansion
O contraction
O expansion
O packing
O squeezing
Answers
Answer:i
i believe its contraction but i might be wrong
Explanation:
Answer:
It might be expansion, sorry if it's wrong.