chemical energy is converted directly into electrical energy in group of answer choices a galvanic cell. an electrical power plant. an electrolytic cell. an automobile's engine.
Answers
Chemical energy is converted directly into electrical energy in a galvanic cell. The correct option is A.
A galvanic cell, also known as a voltaic cell, is an electrochemical device that harnesses the energy produced by a spontaneous redox (reduction-oxidation) reaction to generate electricity. This process involves two electrodes, typically made of different metals, which are immersed in an electrolyte solution.
In a galvanic cell, the metal with a higher reduction potential (cathode) undergoes a reduction reaction, accepting electrons and forming a more stable species. Simultaneously, the metal with a lower reduction potential (anode) undergoes an oxidation reaction, losing electrons and forming a less stable species. The flow of electrons from the anode to the cathode creates an electric current.
The electrolyte solution facilitates the exchange of ions between the electrodes, which maintains electrical neutrality in the cell. As the redox reaction occurs, the potential difference between the electrodes generates a voltage that can be harnessed to power external devices.
Unlike an electrical power plant, an electrolytic cell, or an automobile engine, a galvanic cell directly converts chemical energy into electrical energy without the need for mechanical or other intermediate processes. This efficient energy conversion makes galvanic cells an essential component in many everyday devices, such as batteries.
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Chemical energy is converted directly into electrical energy in a galvanized cell.
A galvanic cell, also known as a voltaic cell, is an electrochemical cell that generates electrical energy from spontaneous redox reactions taking place within the cell. It consists of two different metals connected by a salt bridge or a porous disk between the two half-cells.
In a galvanic cell, the chemical energy stored in the reactants is transformed into electrical energy by allowing electrons to flow between two different electrodes (the anode and the cathode) through an external circuit. The anode is the electrode where oxidation occurs (loss of electrons), and the cathode is the electrode where reduction occurs (gain of electrons). The flow of electrons produces a current that can be utilized to power electrical devices.
An electrical power plant, an electrolytic cell, and an automobile's engine do not directly convert chemical energy into electrical energy. Electrical power plants typically convert other forms of energy, such as mechanical or thermal energy, into electrical energy. An electrolytic cell uses electrical energy to drive non-spontaneous chemical reactions, while an automobile's engine converts chemical energy in fuel into mechanical energy to propel the vehicle.
In summary, a galvanic cell directly converts chemical energy into electrical energy through spontaneous redox reactions, providing a source of electricity for various applications.
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Related Questions
help me please with these questions
Answers
I would love for your family and I love to have Answer:
Yes we will have a lot of work done at the house and I just have a few more questions and will call back at your office office if I need help
Yea we will have a lot more fun and Explanation:1 2 3
consider the mechanism. step 1: a bc⟶abc step 2: bc abc⟶a b2 c2 overall: 2bc⟶b2 c2
Answers
The overall reaction represents the combination of the two individual steps. It shows that two molecules of BC react to form the final products B2C2.
The given mechanism involves two steps to describe the overall reaction of 2BC ⟶ B2C2. Let's analyze each step:
Step 1: A + BC ⟶ ABC
In this step, molecule A reacts with molecule BC to form a new intermediate molecule ABC. This step represents a bimolecular reaction where both A and BC are involved in the rate-determining step. The specific details of the reaction mechanism, such as the bond formation and breaking, are not provided in the given information.
Step 2: BC + ABC ⟶ A + B2C2
In the second step, the intermediate molecule ABC reacts with another molecule of BC to produce the desired products A and B2C2. This step suggests that the intermediate ABC is further involved in the reaction and reacts with BC to form the final products.
Overall: 2BC ⟶ B2C2
This reaction is likely to occur through a series of elementary steps, with the intermediate ABC being involved in the reaction.It's important to note that without additional information about the reaction conditions, specific reactants, and the nature of the intermediate, it is challenging to provide a more detailed analysis of the mechanism.
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Ocean tides are caused by the___ attraction of the moon and sun.
Please help me. Asap
Answers
Answer:
Gravitational
Explanation:
please mark brainliest
Why were your results for the Southern Hemisphere opposite of what you found for
the Northern Hemisphere?
Answers
What Element am I?
I have 6 Valence Electrons.
I am in the third row.
My atomic mass is less than Selenium , but it is more than Oxygen. I need the answer ASAP
Answers
Answer:
The correct answer is - sulfur.
Explanation:
In the periodic table, there are 18 groups and 7 rows or periods arranged according to their atomic number or electronic configuration. In the question, it is mentioned that the desired element atomic mass is less than the atomic mass of the selenium which is 78.96, and more than oxygen which is 15.99 with 6 electron valence and present in the third row.
As it has 6 valency of electron it must be in the 16 group of the table that comprises the 6 valency and as it is located in the 3rd row it must be sulfur that also has an atomic mass between selenium and oxygen.
HELPPP OMG THIS IS SO HARD ITS FOR SCIENCE LOL
Answers
Answer:
The nucleus of the atom contains two subatomic particles, the protons which are positively (+) charged and the neutrons which are neutral (no charge).
Explanation:
The list below includes some of the properties of butane, a common fuel. Identify the chemical properties in the list. Check all of the boxes that apply.
denser than water
burns readily in air
boiling point of –1.1°C
odorless
does not react with water
Answers
Answer:
Answer above is incorrect
Explanation:
The true answers are B and E on Edge 2020
Hope this helps :)
Answer:
B and E
Explanation:
on edge hope this helps
A _ serves as a long-term storage area for water or nutrients.
answer) reservoir
Answers
write difference between metallic and non metallic minerals
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Metallic Minerals will be minerals in which metal components are available in their crude structure. Non-metallic minerals don't contain any metal substances in them. At the point when metallic minerals are dissolved another item is shaped. Non-metallic minerals are frequently discovered installed in youthful overlay mountains and sedimentary rocks.
If a question is asking about an opinion, it can be answered with science. true false
Answers
It is false that if a question is asking about an opinion, it can be answered with science.
What is opinion?A personal belief or assumed that is not tested or backed up by evidence is described as an opinion.
A hypothesis is typically a claim based on some form of observation or evidence. Hypotheses must be testable and, once tested, evidence-supported.
Any question that is based on opinion cannot be answered by scientific reasonings as it is not evidence based.
Thus, the given statement is false.
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If the number of hydrogen ion pumps in the etc is increased what impact will this have on substrate level atp production?.
Answers
Answer:
Cq: if the number of hydrogen ion pumps in the etc is increased what impact will this have on substrate level atp production: no impact, increase, decrease, i have no idea. Bears have a tissue known as brown fat. In thses cells the mitochondria have a special protein known as thermogenin.
Explanation:
What is the general name for the class of products formed in an Aldol condensation reaction? Multiple Choice β,γ-Unsaturated carbonyl compound α,β-Unsaturated carbonyl compound α,γ-Unsaturated carbonyl compound β-Hydroxy carbonyl compound
Answers
The general name for the class of products formed in an Aldol condensation reaction is "β-hydroxy carbonyl compound."
Aldol condensation is a reaction that involves the condensation of two carbonyl compounds, typically an aldehyde and a ketone, to form a β-hydroxy carbonyl compound. The reaction occurs under basic or acidic conditions and involves the nucleophilic addition of the enolate ion (formed from one of the carbonyl compounds) to the carbonyl group of the other compound. This results in the formation of a new carbon-carbon bond and the introduction of a hydroxyl group (OH) at the β-position to the carbonyl group.
The term "aldol" comes from the combination of "aldehyde" and "alcohol" since the reaction leads to the formation of a compound with both aldehyde and alcohol functionalities. The resulting product is a β-hydroxy carbonyl compound, where the hydroxyl group is attached to the β-carbon (the carbon adjacent to the carbonyl carbon).
Therefore, among the given options, the correct general name for the class of products formed in an Aldol condensation reaction is "β-hydroxy carbonyl compound."
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A 170 cmº cup of coffee cools from 88°C to the 20°C temperature of the room. Assume that the temperature of the room does not change and coffee has the same specific heat and density as water. What is the entropy change of the coffee? Express your answer with the appropriate units. MÅ ? AS cofee = Value Units What is the entropy change of the room? Express your answer with the appropriate units. o H ? A Sroom = Value Units What is the entropy change of the universe? Express your answer to two significant figures and include the appropriate units. HA ? AS universe Value Units
Answers
The entropy change of the universe is zero, which is consistent with the second law of thermodynamics. Therefore, the entropy of the universe remains constant or the change in entropy is zero.
Answer:AScoffee = -1.71 J/K, ASroom = 1.71 J/K, ASuniverse = 0.
According to the second law of thermodynamics, entropy of an isolated system always increases. In the given question, we need to calculate the entropy change of coffee, room, and universe. Let's solve this problem.
Given: Mass of coffee = 170 g (density of water = 1 g/cm³)
Specific heat of coffee = specific heat of water = 4.18 J/(g·°C)
Temperature of coffee = 88°C
Temperature of room = 20°C
The initial temperature of coffee = 88°C
The final temperature of coffee = 20°C
Change in temperature of coffee (ΔT) = final temperature - initial temperature = 20°C - 88°C = -68°C
Let's calculate the entropy change of coffee. Entropy change of coffee:
AScoffee = -[170 g/(1000 g/1 kg)](4.18 J/(g·°C))ln[(20°C + 273 K)/(88°C + 273 K)]
AScoffee = -[0.17 kg](4.18 J/(g·°C))ln(293 K/361 K)
AScoffee = -1.71 J/K
Now, let's calculate the entropy change of the room. The change in entropy of the room would be equal and opposite to the change in entropy of coffee (based on the principle of energy conservation).
ASroom = -AScoffeeASroom = 1.71 J/K
The entropy change of the universe would be the sum of entropy change of coffee and entropy change of the room.
ASuniverse = AScoffee + ASroomASuniverse = -1.71 J/K + 1.71 J/KA
Suniverse = 0
The entropy change of the universe is zero, which is consistent with the second law of thermodynamics. Therefore, the entropy of the universe remains constant or the change in entropy is zero.
Answer:AScoffee = -1.71 J/K, ASroom = 1.71 J/K, ASuniverse = 0.
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Question 14 PM2.5 is defined as ________
- the mass concentration of particles in the air less than or equal to 2.5 micrometers in diameter. - the mass concentration of particles in the air equal to 2.5 micrometers in diameter. - the mass concentration of particles in the air greater than or equal to 2.5 micrometers in diameter. Question 15 Carbon dioxide (CO2) is a criteria air pollutant. - True - False Question 16 Roughly percent of emissions of carbon monoxide in Santa Clara County come from mobile sources (select the choice closest to the correct answer). - 50 - 75 - 25 Question 17
The term "photochemical smog" is most synonymous with which of the following criteria air pollutants? - lead (Pb) - carbon monoxide (CO) - sulfur dioxide ( SO2) - ozone (O3) Question 18 "Attainment" of ambient air quality standards requires that measured concentrations at all monitoring stations within an air district are below ambient air standards. - True - False
Answers
: PM2.5 is defined as the mass concentration of particles in the air less than or equal to 2.5 micrometers in diameter.Question 15: False, carbon dioxide (CO2) is not considered a criteria air pollutant.
Question 16: The closest answer is 50%, but the exact percentage is not provided in the question.Question 17: The term "photochemical smog" is most synonymous with ozone (O3), which is a criteria air pollutant.Question 18: True, attainment of ambient air quality standards requires that measured concentrations at all monitoring stations within an air district are below ambient air standards.
Question 14 asks about the definition of PM2.5. PM2.5 refers to particulate matter with a diameter less than or equal to 2.5 micrometers. It represents the mass concentration of particles suspended in the air, which are small enough to be inhaled into the respiratory system and can have adverse health effects.
Question 15 states whether carbon dioxide (CO2) is a criteria air pollutant. Criteria air pollutants are a set of pollutants regulated by environmental agencies due to their detrimental impact on air quality and human health. However, carbon dioxide is not considered a criteria air pollutant because it does not directly cause harm to human health or the environment in the same way as pollutants like ozone or particulate matter.
Question 16 asks about the percentage of carbon monoxide (CO) emissions from mobile sources in Santa Clara County. While the exact percentage is not provided in the question, the closest answer option is 50%. However, it is important to note that the precise percentage may vary depending on specific local conditions and emissions sources.
Question 17 inquires about the criteria air pollutant most synonymous with the term "photochemical smog." Photochemical smog is primarily associated with high levels of ground-level ozone (O3). Ozone is formed when nitrogen oxides (NOx) and volatile organic compounds (VOCs) react in the presence of sunlight, creating a hazy and polluted atmospheric condition.
Question 18 addresses the concept of "attainment" of ambient air quality standards. To achieve attainment, measured concentrations of pollutants at all monitoring stations within an air district must be below the established ambient air quality standards. This ensures that the air quality in the given area meets the required standards for protecting human health and the environment.
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Is Used oil poured into a water drain in the street a non-point source solution or point source solution?
Answers
Answer:
Non point source pollution
Explanation:
Point source pollution is when any contaminant enter the environment from an easily from an easily identified and confined place.
Non point source pollution is pollutants released in a wide space. Including oil, grease, and toxic chemicals.
Explain in a three-paragraph essay the mechanics of how a battery works. How does the choice of metals used in a battery affect its performance? what specific metals work best?
Answers
A battery is a device that converts chemical energy into electrical energy through a process known as an electrochemical reaction.
How does a battery work ?When a battery is connected to a circuit, the electrochemical reaction causes a flow of electrons from the anode to the cathode, generating an electric current that can power a device.
The metal chosen for the anode must be capable of losing electrons easily, while the metal chosen for the cathode must be capable of accepting electrons. The choice of metals can also affect the voltage and capacity of the battery, as well as its overall efficiency.
In general, the metals used in a battery should have a large difference in their electronegativity values, which determines how easily an atom can attract electrons. Common metals used in batteries include zinc, lithium, nickel, and cadmium.
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Which two options
are
examples of chemical changes?
Answers
But some examples of chemical changes are:
Burning
Change in color
Change in temperature
Noticeable odor
Which electron notation is incorrect?
1s 2s 2p 3s 3p 10
1s 2s 2p 3s 3p3
1s2 282 2p 3s 3p6
Answers
In a Nickel (II) Complexes: Linkage Isomers and others Lab
a. What is an ambidentate ligand? Give two examples (other than NO2). Show how the two ligands that you listed and NO2 can bind to a metal ion (M). give the IUPAC name for each of the ligands that you listed.
b. What is an polydentate ligand? Draw the structure of two examples and include the molecular formula. Describe the chelate effect including how it lowers the overall energy of a comples. Give the IUPAC name for each of the ligands that you listed
Answers
An ambidentate ligand is a ligand that can bind to a metal ion (M) through two different donor atoms.
Two examples of ambidentate ligands (other than NO₂) are SCN⁻ and NCS⁻. SCN⁻ can bind through the sulfur atom (S) or the nitrogen atom (N), forming [M-SCN] or [M-NCS] complexes. The IUPAC names for these ligands are thiocyanato (SCN⁻) and isothiocyanato (NCS⁻).
A polydentate ligand is a ligand that can bind to a metal ion (M) through multiple donor atoms simultaneously. Two examples are ethylenediamine (en) and ethylenediaminetetraacetic acid (EDTA).
The chelate effect occurs when a polydentate ligand forms a ring with a metal ion, which stabilizes the complex and lowers its overall energy. The IUPAC names for these ligands are ethane-1,2-diamine (en) and (ethylenedinitrilo)tetraacetate (EDTA).
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BROOO HELPPPP
Three students are given a 200g object to weigh on a balance and record the following masses: 150g, 151g, 150g. What can be said about the accuracy and precision of the balance?
Answers
In the given weigh on a balance and recorded masses 2.25g is the accuracy and precision of the balance
A balance used to weigh quantities to a very precise number, usually up to one milligram and accuracy is the balance related to the measurement uncertainty of each reading.
Here given data is three students are given = 200g weight and record the following masses = 150g, 151g, 150g
We have to calculate accuracy and precision of the balance = ?
So accuracy and precision of the balance = sum of data/no of measurement
Here sum of data means = 150g, 151g, 150g and no of measurement = 200g
accuracy and precision of the balance = 150g+151g+150g/200
accuracy and precision of the balance = 2.25g
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The average rate of a reaction is the rate of reaction at any given time.
A) True
B) False
Answers
B) False. The average rate of a reaction is the change in the concentration of a reactant or product over a certain time interval, usually calculated by dividing the change in concentration by the time interval.
It is not the rate of reaction at any given time, but rather an average of the rate of reaction over a certain period of time.
The rate of reaction at any given time is called the instantaneous rate of reaction, and it is calculated by finding the slope of the tangent line to the concentration-time curve at a particular point in time. The instantaneous rate of reaction can change over time as the concentration of reactants and products change, whereas the average rate of reaction remains constant over the time interval for which it is calculated.
Suppose a reaction occurs according to the equation A → B. The rate of this reaction can be expressed as:
Rate = - d[A]/dt = d[B]/dt
where d[A]/dt is the rate of disappearance of A and d[B]/dt is the rate of appearance of B. The negative sign in the equation indicates that the rate of disappearance of A is equal in magnitude but opposite in sign to the rate of appearance of B.
The instantaneous rate of the reaction at a particular time t can be calculated by finding the slope of the tangent line to the concentration-time curve of either A or B at that time. This tangent line represents the rate of reaction at that specific moment in time.
On the other hand, the average rate of the reaction over a certain time interval (t1 to t2) can be calculated by taking the difference in the concentration of A or B at time t2 and time t1, and dividing it by the time interval (t2 - t1):
Average rate = (Δ[A]/Δt)avg = - (Δ[B]/Δt)avg
where (Δ[A]/Δt)avg is the average rate of disappearance of A and (Δ[B]/Δt)avg is the average rate of appearance of B over the time interval.
Therefore, the average rate of a reaction is not the rate of reaction at any given time, but rather an average of the rate of reaction over a certain period of time. The instantaneous rate of reaction, on the other hand, is the rate of reaction at a specific moment in time.
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Calculate the pH of the solution:
[OH-] = 1x10^-11M
a.11.0
b.12.0
c.2.7
d.3.0
Answers
p [OH-] = -log[OH-]= -log ( 1x10^-11M) = 11
we know that
p[OH-] + p[H+] = 14
so p[H+] = 14- p[OH-] = 14- 11 = 3
pH = 3, answer
Question 2 of 10
Which of the following statements are true of groups on the periodic table?
Check all that apply.
A. Elements in a group are the same size.
B. Elements in a group are in the same row of the periodic table.
OC. Elements in a group have the same number of electrons in their
outer shell.
D. Elements in a group have similar properties.
Answers
Please mark brainliest I need two more!!!!!!!!!!!
Which state of matter does this model represent?
Answers
Answer:
liquid or gas
Explanation:
the molecules are not packed together
Answer:
liquid
Explanation:
The molecules are not packed together (solid), or too far apart (gas).
A. If both Assertion & Reason are true and the reason is the correct explanation of the assertion. B. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion. C. If Assertion is true statement but Reason is false. D. If Assertion is false and Reason is true Assertion: .Formation of soluble products from insoluble ones is called precipitation. Reason : Precipitation involves formation of insoluble products from soluble ones
Answers
Answer:
D- Assertion is false and Reason is true
Explanation:
Precipitation is said to have occurred when an insoluble product is formed from soluble ones. Let us take an instance;
BaCl2(aq) + H2SO4(aq) -------> BaSO4(s) + 2HCl(aq)
The barium sulphate so formed is an insoluble product obtained from the reaction of soluble barium chloride and sulphuric acid. This is a typical example of a double replacement reaction as the both ions exchanged partners.
Thus, the assertion is false but the reason is true.
Which is least likely to get reduced
URGENT
Cu2+
Zn2+
Fe3+
Fe2+
Answers
The electropositive ion that is least likely to get reduced is Zn²⁺ (option B).
What is electropositivity?Electropositivity in chemistry is tendency of an element to release electrons to form a chemical bond or positively charged cations.
Electropositivity is primarily exhibited by metallic elements, especially the alkali metals and the alkaline earth metals.
Electropositivity is the opposite of electronegativity, which is a measure of the tendency of an atom to gain electrons and form negatively charged anions. Therefore, highly electropositive elements have very low electronegativities and vice versa.
Based on the cations given in this question, zinc (Zn²⁺) is the most electropositive, hence, has the least tendency to be reduced i.e. gain electrons.
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Magnesium lon has less electrons than its atom
True
False
Answers
hope that helps
Hydroelectric requires this force to increase the mechanical energy gathered.
Combustive
Velocity
Gravitational
Thermal
Answers
true or false? pth and 1,25(oh)2d (vitamin d) are the principal hormones involved in the normal physiologic regulation of calcium homeostasis.
Answers
PTH and 1,25(OH)2D are the primary hormones responsible for maintaining calcium balance in the body, playing crucial roles in regulating calcium levels.
PTH and 1,25(OH)2D work in tandem to regulate calcium levels in the body. PTH increases calcium release from bones and enhances calcium reabsorption by the kidneys, while active vitamin D promotes calcium absorption from the intestines. This coordinated action of PTH and 1,25(OH)2D helps maintain the normal physiologic regulation of calcium homeostasis.
Parathyroid hormone (PTH) is released by the parathyroid glands in response to low blood calcium levels. PTH acts on the bones, kidneys, and intestines to increase calcium levels. It stimulates the release of calcium from the bones, enhances the reabsorption of calcium by the kidneys, and promotes the production of active vitamin D.
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please please help me i do not get this
Answers
Answer:
C⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
A divergent boundary is when two tectonic plates move apart from one another.
Answer:
A tectonic boundary where two plates are moving away from each other and new crust is forming from magma that rises to the Earth's surface between the two plates. The middle of the Red Sea and the mid-ocean ridge (running the length of the Atlantic Ocean) are divergent plate boundaries.
Explanation: