the galvanic cell shown below produces an electric current. which statement shown below concerning this galvanic cell must be true?
Answers
The galvanic cell shown below produces an electric current. The statement concerning this galvanic cell that must be true is given below. "The oxidation half-reaction occurs at the anode, and the reduction half-reaction occurs at the cathode."
Explanation:A galvanic cell is an electrochemical cell that converts the chemical energy of a spontaneous redox reaction into electrical energy. The electrons move from the anode to the cathode in a galvanic cell.The statement concerning this galvanic cell that must be true is "The oxidation half-reaction occurs at the anode, and the reduction half-reaction occurs at the cathode."
The anode is the electrode where oxidation occurs, whereas the cathode is the electrode where reduction occurs in a galvanic cell.A spontaneous oxidation-reduction reaction occurs in a galvanic cell, and the reaction proceeds due to the transfer of electrons from the anode to the cathode. Therefore, in this galvanic cell, electrons move from the anode to the cathode.
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Related Questions
Help!!
What is the concentration of an unknown with an absorbance of 0.4 using the plot?
Answers
Answer:3,4,1,2
Explanation:
hope this helped
A chemical reaction performed inside a bomb calorimeter causes the temperature of the water to rise
by 32.5 o
C. How many Joules of energy were released by the reaction? The calorimeter contains 250.0
mL of water; the specific heat of water is 4.182 J/g.oC.
Answers
In the hypothetical situation, a chemical reaction inside a bomb calorimeter causes the water inside it to heat up to 32.5 °C. Many computations are needed to figure out how much energy the process releases.
First, the density of water (1 g/mL) is used to convert the volume of water (250.0 mL) to its mass, so that the mass is 250.0 g.
The formula energy = mass of water * specific heat of water *temperature change is then used to determine the energy released. In general, the specific heat of water is 4.182 J/g°C.
Using known values to fill in the blanks in the equation, we calculate the energy released as approximately 34,001.25 joules.
The amount of energy released during a chemical reaction can be calculated. This shows how important it is to understand the specific heat capacity of substances such as water when estimating the energy changes brought about by reactions.
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Choose the pair of substances that are most likely to form a homogeneous solution.
A. F2 and C2H5OH
B. H2O and CH3OH
C. LiCl and C10H20
D. CH4 and C2H5OH
Answers
A) F2 and C2H5OH (Heterogeneous mixture)B) H2O and CH3OH (Homogeneous mixture)C) LiCl and C10H20 (Heterogeneous mixture)D) CH4 and C2H5OH (Heterogeneous mixture).
The pair of substances that are most likely to form a homogeneous solution is B. H2O and CH3OH. A homogeneous mixture is one in which the components are evenly distributed throughout the mixture. These types of solutions have uniform properties and the same composition throughout.A heterogeneous mixture is one in which the components are not evenly distributed. This means that the mixture has distinct regions or phases that are visibly different from one another. The following are the most likely pairs of substances to form a homogeneous solution:A) F2 and C2H5OH (Heterogeneous mixture)B) H2O and CH3OH (Homogeneous mixture)C) LiCl and C10H20 (Heterogeneous mixture)D) CH4 and C2H5OH (Heterogeneous mixture).
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Which of the following will most likely happen if you apply unbalanced forces to an object? (4 points)
a
It will change position.
b
It will become charged.
c
It will change mass.
d
It will change size.
Answers
When an unbalanced force is applied to an object, It will change position; option A.
What are forces?Forces are agents which cause a change in the position or state of an object.
According to Newton's second law of motion, the change in momentum of a body is directly proportional to the applied force and take place in the direction of the applied force.
The movement or change in position of object is due to unbalanced forces.
When there are unbalanced forces, the object will change position in the direction of the unbalanced force.
In conclusion, unbalanced forces are forces which cause changes in position and state of objects.
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was Velcro a mistake or purpose
Answers
Answer:
Velcro was an accident.
Explanation:
hope it helps
sry if im wrong
Answer:
it was a accident
Explanation:
A balloon is filled with 100.0 Lair at 1.300 atm pressure. what pressure is needed to change the volume to 25.00 L
Answers
Answer:
4 atmospheric pressure is needed to get a volume of 25 litres
Mention and discuss briefly the adverse effects of chemistry.
Answers
Depending on the chemical, these longer-term health effects might include:
organ damage. weakening of the immune system. development of allergies or asthma. reproductive problems and birth defects. effects on the mental, intellectual or physical development of children. cancer.At 1000° C, cyclobutane (C4H8) decomposes in a first-order reaction, with the very high rate constant of 87 s−1, to two molecules of ethylene (C2H4)
(a) The initial C4H8 concentration is 2.00 M. What is the concentration after 0.010 s?
(b) What fraction of C4H8 has decomposed in this time?
Answers
The amount after the given time is 0.84 M
The percentage decomposed is 58%
What is a first order reaction?A first-order reaction is a chemical reaction in which the rate of reaction is proportional to the concentration of one reactant raised to the first power. The rate law expression for a first-order reaction is:
Rate = k[A]
Where [A] is the concentration of the reactant and k is the rate constant, which is specific to the reaction and temperature. In a first-order reaction, the half-life of the reaction is independent of the initial concentration of the reactant and is a constant value for a particular reaction.
Given that;
ln[A]t = ln[A]o - kt
ln[A]t = ln 2 - (87 * 0.01)
[A]t = 0.84 M
Thus the fraction decomposed = 2 - 0.84/2 * 100/1
= 58%
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I’m second guessing myself here...
Answers
A car is traveling at 50mph. How long will it take the car to travel 300 miles?
Answers
Answer:
6 hours
Explanation:
If it is traveling at 50mph and needs to reah 300 miles, to figure this problem out you would want to divide 300 by 50 to get 6 hours. So it will take six hours until the car travels 300 miles
Hope this helps.
Answer: A car travels at a rate of 50 miles per hour. how long will it take the car to travel 300 miles?
Explanation: .
Applying the distance formula:
d = rt
where
d is distance (300 miles)
r is rate (50 mph)
t is time (hours)
.
300 = 30t
300/30 = t
10 hours = t
meantion the two groups of mineralsalts and their two examples (each)
Answers
Answer:
sodium example salt and soy sauce
potassium example meat milk fresh fruits
Which are effects of long-term exposure to mustard gas? Select all that apply. One, some, or all responses may be correct.
Answers
The effects of long-term exposure to mustard gas causes mortality and chronic respiratory disease.
Exposure to mustard gas in the long term can result in mortality from influenza, pneumonia as well as chronic breathing disease. Exposure for long term leads to respiratory complications and septic shock. Extensive breathing in the environment of mustard gas can cause chronic respiratory disease, respiratory infections or death.
Extensive eye exposure to this gas can cause permanent blindness. Exposure to mustard gas may also increase the chances of lung and respiratory cancer so we can conclude that mustard gas is lethal and can cause a number of diseases in a person who is exposed to it.
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naturally occurring elements exists as a mixture of _______ and the percentages of each in any given element is constant.
Answers
Naturally occurring elements exist as a mixture of isotopes and the percentages of each in any given element is constant.
Isotopes are atoms of the same element with the same number of protons but different numbers of neutrons in their nucleus. This difference in the number of neutrons gives each isotope a different mass.
The percentages of each isotope in any given element are constant, meaning that the proportion of each isotope in a sample of an element will remain the same regardless of where it is obtained. This is referred to as the element's isotopic abundance.
The percentages of each isotope in any given element are determined by the element’s atomic structure. This is because the amount of energy required to change the element’s isotopic abundance is so great that even at high temperatures, the element's isotopic abundance remains the same.
Therefore, the isotopic abundance of an element is an intrinsic property of the element, and the percentages of each isotope are constant.
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Naturally occurring elements exist as a mixture of isotopes, and the percentages of each in any given element is constant.
Isotopes ,Which are atoms of the same element with different numbers of neutrons in the nucleus. These isotopes have the same atomic number but different atomic masses, which means they have different numbers of neutrons in their nucleus.
The different isotopes of the same element all have different physical and chemical properties. The percentage of each isotope in a sample of a naturally occurring element is constant and is referred to as the isotopic abundance of the element.
The isotopic abundance of an element is determined by measuring the amount of each isotope of the element in a sample. The most abundant isotope is the most stable and least radioactive, meaning it will make up the majority of the sample.
The other isotopes are typically less stable and more radioactive, and make up a smaller percentage of the sample. The combination of the different isotopes of the same element make up the sample, and the total percentage of each isotope will remain the same in any given sample.
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Why are some resources, like fossils, found in some places and not in others?
result of animal preference
result of the water cycle
result of the carbon cycle
result of geological processes
2:Why are fossils found in certain types of rocks?
Fossils are found in sedimentary rocks, which form on the surface of Earth where living organisms once lived. Fossils are found in igneous rocks, which form inside Earth where living organisms sometimes hide. Fossils are found in metamorphic rocks, which form on the surface of Earth where living organism once lived. Fossils are found in atmospheric rocks, which form inside Earth where living organisms sometimes hide
Answers
Some resources, like fossils, are found in some places and not in others as a result of geological processes.
Fossils are found in certain types of rocks, such as sedimentary rocks, which form on the surface of Earth where living organisms once lived.
Geological processes like weathering, erosion, deposition, and metamorphism have a significant impact on the distribution of fossils. These processes can cause the erosion of rocks and expose the fossils hidden within them, making them available for discovery.
Fossils are found in certain types of rocks, such as sedimentary rocks, which form on the surface of Earth where living organisms once lived. This is because these rocks are formed from the accumulation and cementation of sedimentary deposits like clay, sand, and gravel, where the remains of dead organisms can be preserved.
Igneous rocks are formed from molten magma, so it is unlikely that fossils will be found in them.
Metamorphic rocks are formed from existing rocks that are subjected to heat and pressure, and it is also unlikely that fossils will be found in them.
Atmospheric rocks are not a type of rock, so fossils are not found in them.
Therefore, fossils are most commonly found in sedimentary rocks.
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According to scientific thought, what is a theory? O a a confirmed hypothesis O an unsubstantiated idea an interpretation supported by facts O a controversial guess
Answers
Answer:
- an interpretation supported by facts.
Explanation:
A scientific theory is a well-substantiated explanation of some aspect of the natural world, based on a body of facts that have been repeatedly confirmed through observation and experiment. Such fact-supported theories are not "guesses" but reliable accounts of the real world.
Write the chemical symbols for three different atoms or atomic cations with 26 electrons.
Answers
Mn-1 (a manganese that has gained one electron)
Co+1 (a cobalt that has lost on electrons)
All three of these atoms/ions are isoelectronic, meaning that they all have the same number of electrons!
The chemical symbols for three different atoms or atomic cations with 26 electrons are Fe, \(Co^+\), \(Ni^{2+}\)
Explanation:
The atomic number of an atom is equal to the number of protonsAn atom is neutral, it has an equal number of electrons and protons.Element with atomic number 26 is Iron, Fe.A neutral atom of iron has an equal number of protons and electrons.Cobalt has an atomic number of 27.A neutral atom of cobalt has an equal number of protons and electrons.Cobalt has 27 electrons and by losing one electron it will form a cobalt (I) ion with 26 electrons.The cobalt (I) ion has 26 electrons, \(Co^+\).Nickel has an atomic number of 28.A neutral atom of nickel has an equal number of protons and electrons.Nickel has 28 electrons and by losing two electrons it will form a nickel(II) ion with 26 electrons.The nickel (II) ion has 26 electrons,\(Ni^{2+}\).So, from this, we can write chemical symbols for three different atoms or atomic cations with 26 electrons are Fe, \(Co^+\), \(Ni^{2+}\).
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The figure below shows how sound spread out from a horn after it is blown.
Describe what happens to the energy, intensity and amplitude of the sound waves as you travel away from the horn?
Answers
Animals breathe in_____________and breathe out______________.
In sunlight, plants take in______________and release______________
Answers
Answer:
1. Animals breathe in oxygen and breathe out carbon dioxide.
2. In sunlight, plants take in carbon dioxide and release oxygen.
Hope this answer will help you.
Answer:
air and breathe out carbon and plants take in sun light and realese clean air
how many moles are in 6.4grams of copper
Answers
Answer:
One mole of copper atoms has Avogadro number of copper atoms i.e. 6.022×10
23
atoms.
Given the mass of Copper is 6.4g
Number of Copper atoms in 6.4g =
molar mass
given mass
×Avogadro number
=
63.55
6.4
×6.022×10
23
copper atoms
=6.064×10
22
copper atoms
Explanation:
Why do some experiments blow up?
Answers
Answer:
because of chemical reactions
Answer:
gases expand rapidly because their particles move at high speeds in all directions
Which of the following electronic transitions in the oxygen atom will result in light emission?
A.n i= 1⟶nf = 2
B.n i= 1⟶nf =3
C. n i =3⟶n f =2
D. n i =2⟶n f =3
Answers
Answer:The answer is C. n i =3⟶n f =2
Explanation: I just take the test, I hope and helps, I know that is late.
Answer:
C. nᵢ = 3 ⟶ nᶠ = 2
Explanation:
definition of compounds
Answers
What did the Fish and Wildlife Service (FWS) do to bring back black-footed ferrets from extinction?
The FWS moved mating pairs from the Wyoming population to over 8 western states and Mexico to begin new colonies.
The captive breeding program was implemented too late to save the black-footed ferret.
The FWS monitored a Wyoming population and captured enough individuals to start new populations.
The FWS use a captive breeding program to start populations in 8 states.
Answers
Answer:
The FWS use a captive breeding program to start populations in 8 states
Explanation:
I just took a quiz and got this answer right.
Answer:
The FWS use a captive breeding program to start populations in 8 states
Explanation:
Promiscuous enzymes metabolize many alcohols in the human liver The example molecule used in the Chemistry Tutorial (1-propanol) and its metabolite are not the only molecules that can be oxidized by ADH and ALDH, respectively. In fact, ADH and ALDH are promiscuous enzymes, meaning that they are not specific in catalyzing the oxidation of just one specific alcohol or aldehyde. On the other hand, ADH will not catalyze the oxidation of every alcohol either.
For example, ADH can oxidize all of the following compounds except tert-butanol
- Methanol
- Isopropanol
- Ethylene glycol
- Tert-butanol
What characteristic of the substrate must the active site of ADH recognize? a. a hydrogen atom located on a carbon next to a with an-OH group (vicinal position)
b. atom located on the same carbon as an-OH group (geminal position)
c. an internal - OH group (a secondary alcohol)
d. a terminal -OH group (a primary alcohol)
Answers
The characteristic of the substrate that the active site of ADH must recognize is option A: "hydrogen atom located on a carbon next to a with an-OH group (vicinal position)".
This is because ADH is an enzyme that catalyzes the oxidation of alcohols to aldehydes or ketones. In order for this reaction to occur, the substrate must have a hydrogen atom located on a carbon next to an -OH group. This allows the enzyme to recognize the substrate and catalyze the reaction.
Without this characteristic, the enzyme will not be able to recognize the substrate and the reaction will not occur.
ADH specifically recognizes and binds to this particular feature of the substrate through its active site, which has a complementary shape and chemical properties to the substrate. This binding allows the enzyme to position the substrate in a way that facilitates the transfer of a hydrogen ion and a pair of electrons to the coenzyme NAD+ to form NADH, while producing an aldehyde or ketone.
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The characteristic of the substrate that the active site of ADH must recognize is option A: "hydrogen atom located on a carbon next to a with an-OH group (vicinal position)".
This is because ADH is an enzyme that catalyzes the oxidation of alcohols to aldehydes or ketones. In order for this reaction to occur, the substrate must have a hydrogen atom located on a carbon next to an -OH group. This allows the enzyme to recognize the substrate and catalyze the reaction.
Without this characteristic, the enzyme will not be able to recognize the substrate and the reaction will not occur.
ADH specifically recognizes and binds to this particular feature of the substrate through its active site, which has a complementary shape and chemical properties to the substrate. This binding allows the enzyme to position the substrate in a way that facilitates the transfer of a hydrogen ion and a pair of electrons to the coenzyme NAD+ to form NADH, while producing an aldehyde or ketone.
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1. Look at yourself in the front of the spoon (the side where the food sits). What do you see?
The you see the image
Answers
Answer:
If you look at yourself in the front of the spoon, you see that the mirror forms an inverted real image.
Explanation:
The word 'concave' means to bend inwards.
A curved mirror is a mirror that has a curved reflecting surface.
The front side of the spoon is just like a concave mirror. If you look at yourself in the front of the spoon, you see that the mirror forms an inverted real image.
Concave mirrors produce real inverted image of an object only if it is placed further away from the mirror than the focal point.
Answer:
It shows me upside down like a ghost. OoooOooh
Explanation:
Boo
How many lone pairs are in SO4 2-
Answers
Answer:
None
Explanation:
There are two S=O. bonds and two S-O bonds in sulfate ion lewis structure. Sulfur atom is the center atom and four oxygen atoms are located around sulfur atom. There are no lone pairs in the last shell of sulfur atom.
molar mass of 4Fe(OH)2
Answers
Answer: The molar mass and molecular weight of 4Fe is 223.38.
A(n) ____________ acts to maintain a relatively stable concentration of hydrogen ions in a solution.
Answers
Answer:
buffer
Explanation:
1. Which of the following species determines the chemical properties of an atom?
A. Electron
B. Neutron
C. Nucleus
D. Proton
2. The following glasswares are used to measure the volume of liquids except
A. graduated beaker
B. pipette
C. test tube
D. burette
3. Pauli exclusion principle is related to
A. quantity of electrons in the valence shell
B. filling the orbitals with lower energy first
C. the filling of degenerated orbitals
D. quantum numbers of electrons
Answers
Explanation:
The number of electrons, in turn, determines the chemical properties of the atom. Protons contribute to the mass of an atom and provide the positive charge to the nucleus. The number of protons also determines the identity of the element
Answer:
Question 1: (A)
The number of electrons determine the chemical properties of an atom.
Question 2: (C)
Test tube cannot measure the volume of liquids rather they are used in chemical reactions
Question 3: (D)
Pauli's Exclusion Principle states that no two electrons in the same atom can have identical values for all four of their quantum numbers.
For each of the following pairs of compounds, choose which will elute faster in a TLC experiment (i. E. , which compound will have a larger Rf value). Explain what factors led to your choice. 6 pt a. Naphthalene or 1-Bromonaphthalene Choice Explanation: 1-Bromonaphthalene is more polar than Naphthalene. If polarity is higher, its Rf value will be less which means that molecule will travel less distance (lower Rf value) during a TLC experiment
Answers
In a TLC experiment, the compound with the larger Rf value will elute faster. In the case of naphthalene and 1-bromonaphthalene, the 1-bromonaphthalene will elute faster and have a larger Rf value.
This is because 1-bromonaphthalene is more polar than naphthalene. Polar compounds have a stronger attraction to the polar stationary phase (such as the silica gel in TLC plates) and will interact more with it, resulting in a lower Rf value.
Naphthalene, on the other hand, is less polar and will have a weaker interaction with the stationary phase, allowing it to travel further and have a higher Rf value.
The polarity of a compound is determined by the presence of functional groups or atoms that create an uneven distribution of charge or electronegativity. In this case, the bromine atom in 1-bromonaphthalene increases its polarity compared to naphthalene, leading to a stronger interaction with the stationary phase.
In summary, the 1-bromonaphthalene will elute faster in a TLC experiment and have a larger Rf value compared to naphthalene due to its higher polarity resulting from the presence of a bromine atom.
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