Eocell=Eofinal - Eoinitialor
Answers
Eocell represents the electromotive force or cell potential of an electrochemical cell. It is calculated by subtracting the initial potential of the anode (Eoinitial) from the final potential of the cathode (Eofinal).
An electrochemical cell is made up of two half-cells, which are connected by a wire and a salt bridge. The anode and cathode are the sites of oxidation and reduction reactions, respectively. During these reactions, electrons flow from the anode to the cathode, producing a potential difference between the two half-cells. This potential difference is measured in volts and is known as the cell potential or Eocell.
To calculate Eocell, the potential of the anode (Eoinitial) and the potential of the cathode (Eofinal) are measured. The potential difference between the two is then calculated by subtracting Eoinitial from Eofinal. The resulting value gives us the cell potential or Eocell.
In summary, Eocell is the measure of the cell potential of an electrochemical cell and is calculated by subtracting the potential of the anode from the potential of the cathode.
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Related Questions
which substance is a Brønsted-Lowry conjugate acid? HClO4(aq)+H2O(l)→H3O+(aq)+ ClO4-(aq)
Answers
Answer:
Explanation:
(a) C5H5N(aq)+H2O(l)⇌C5H5NH+(aq)+OH−(aq)
Which example best demonstrates stewardship of the atmosphere
Answers
Incomplete question. However, I provided a specific example of stewardship of the atmosphere.
Explanation:
First, note that the term stewardship refers to the belief that humans are obligated to take care and look after our environment (which includes the atmosphere.
An example of this is: deciding to change our mode of transportation: What this entails is that we may decide to switch to riding a bicycle to places rather than going by car. By so doing you will be reducing the number of greenhouse gases emitted into the environment as bicycles do not emit harmful gases when used.
John is completing a lab in which he is using the corrosive base sodium hydroxide (NaOH). For this laboratory experiment, what types of safety precautions should he take
Answers
Please put on a lab apron. It helps shield clothing from damage and stains. Examining glass for fractures and chips. This damaged or chipped glassware needs to be properly disposed of.
In order to deal with it safely, we must take the appropriate precautions. Skin burns or other skin injury can be brought on by sodium hydroxide. Additionally, it can injure eyes. Learn as much as you can about the chemicals that will be utilized, including any exposure or leak risks. Find the spill kits and learn how to use them. Verify labels and throw away any chemicals that aren't 100 percent pure. For ease of access, alphabetize the lab chemicals. Security is the practice of keeping unwelcome dangers and hazards out of the lab environment.
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draw the lewis structure for the polyatomic nitrite no−2 anion. be sure to include all resonance structures that satisfy the octet rule.
Answers
The structures show the different possible locations of the double bond and the distribution of electrons. The actual structure of the nitrite ion is a combination or hybrid of these resonance structures, with delocalized electrons.
The polyatomic nitrite ion, NO₂⁻, consists of a central nitrogen atom bonded to two oxygen atoms. To draw the Lewis structure, we need to determine the total number of valence electrons and distribute them among the atoms while satisfying the octet rule.
Count the total number of valence electrons:
Nitrogen (N) contributes 5 valence electrons.
Each oxygen (O) contributes 6 valence electrons.
Total valence electrons: 5 + 2(6) + 1 = 18
Place the atoms and connect them with single bonds:
N-O
Distribute the remaining electrons to complete the octet of each atom:
Place two lone pairs (4 electrons) on each oxygen atom, and distribute the remaining 8 electrons around the nitrogen atom.
Refer image attached below for Lewis structure of the nitride ion.
Check if all atoms have a complete octet:
The oxygen atoms each have 2 lone pairs, resulting in an octet (8 electrons).
The nitrogen atom has 3 lone pairs and a bonding pair, resulting in an expanded octet (10 electrons).
However, in the case of nitrite ion (NO₂⁻), the nitrogen atom can form resonance structures by moving a lone pair from one of the oxygen atoms to form a double bond. This allows for the delocalization of electrons and the stabilization of the molecule.
Therefore, the resonance structures of nitrite ion (NO₂⁻) are:
O=N-O O-N=O
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Select the parameters that are required for proposing a valid reaction mechanism. Select all that apply.
-Elementary steps sum to overall balanced equation
-Physically reasonable elementary steps
-Correlation of rate law with experimental rate law
Answers
All of the options listed are required for proposing a valid reaction mechanism. The elementary steps must sum to the overall balanced equation, the steps must be physically reasonable, and the rate law must correlate with the experimental rate law.
To propose a valid reaction mechanism, you should consider the following parameters:
1. Elementary steps sum to overall balanced equation: This ensures that the individual elementary steps add up to form the overall reaction, and the mass and charge are balanced in the process.
2. Physically reasonable elementary steps: The proposed elementary steps should be feasible based on known physical and chemical principles, ensuring that the mechanism is realistic.
3. Correlation of rate law with experimental rate law: The rate law predicted by the proposed mechanism should match the experimentally observed rate law, indicating that the mechanism is consistent with the observed behavior of the reaction.
So, all three parameters are required for proposing a valid reaction mechanism.
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Question 6
Which of the following atoms has the highest first lonization energy?
ON
OU
Rb
Answers
Answer:
HELIUM IS HE ANSWER
Explanation:
GOOD LUCK
which of the following is a strong acid in aqueous solution? a. h3po4 b. hclo c. h3po3 d. hno2 e. hbr
Answers
The correct option is Hydrobromic acid (hbr), This is the strong Acid when compared to the other acids
Hydrobromic acid is the term for aqueous HBr.
Hydrogen bromide will be the name if there is no water, or if it is not aqueous, while hydrobromic acid will be the name if it is acidic and aqueous. Because it is acid, the suffix ic is used, and because it is aqueous, the suffix hydro is used.
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what is change in science??
Answers
Answer:
A transition from one accepted theory to another or from one employed method to another.
Explanation:
Please I need help with this. Whoever answers it correctly will get Brainly
Answers
Answer: if the question says between Animals than a you didn't include the whole question.
Explanation:
How much heat would be released by burning one gallon of octane? The density of
octane is 0.703g/mL. 1 gallon = 3.79 liters.
Answers
Answer:
127,236 kj of heat
Explanation:
This is the final answer
Explanation:
One gallon of octane produces approximately 7000 L of carbon dioxide.
Note: At
20
o
C
, the density of octane,
C
8
H
18
, is 0.70300 g/mL, and the mass in grams in one gallon would be 2661 g. http://blueskymodel.org/gallon-gas At
15
o
C
, the density of octane is 0.91786 g/mL (http://www.simetric.co.uk/si_liquids.htm), and the mass of one gallon of octane would be 3474 g, which is approximately 4000 g.
Since the temperature in the problem is
21
o
C
, I believe that the mass of octane should have been given as 2661 g. However, I understand that your instructor probably gave you this problem, so I will use 4000 g for the approximate mass of one gallon of octane. You can rework the problem on your own, substituting the correct masses of octane if you wish.
Step1. You must first determine the number of moles that are in 4000 g of octane, using the molar mass of octane. Step 2. Then you must determine the number of moles of carbon dioxide that can be produced by that number of moles of octane, based on the mole ratio between octane and carbon dioxide in the balanced equation. Step 3. Then use the ideal gas law to determine the volume in liters of carbon dioxide that can be formed.
Known/Given:
mass of octane = approximately 4000 g
temperature:
21.0
o
C
+
273.15
=
294.2 K
pressure = 1.00 atm
gas constant
R
=
0.08205736 L atm K
−
1
mol
−
1
molar mass of octane,
C
8
H
18
=
114.232 g/mol
mole/mole ratio for
C
8
H
18
and
CO
2
=
2 mol
C
8
H
18
/
16 mol
CO
2
Unknown:
volume of
CO
2
Balanced Chemical Equation:
2 C
8
H
18
(
l
)
+
25 O
2
(
g
)
→
16 O
2
(
g
)
+
18 H
2
O
(
g
)
Ideal Gas Law:
PV
=
nRT
Step 1. Determine Moles of Octane in One Gallon
4000 g C
8
H
18
x
1 mol
114.232 g
=
35.0164 mol C
8
H
18
Step 2. Moles of Carbon Dioxide Produced by One Gallon of Octane
Multiply moles of octane times the mole/mole ratio between octane and carbon dioxide, so that carbon dioxide is in the numerator.
35.0164 mol C
8
H
18
x (
16 mol
CO
2
/
2 mol
C
8
H
18
) =
280.1312 mol
CO
2
Step 3. Calculate Volume of
CO
2
Produced from One Gallon of Octane using the Ideal Gas Law, PV = nRT.
P = 1.00 atm
n = 280.1312 mol
CO
2
R=
0.08205736 L atm K
−
1
mol
−
1
T =
294.2 K
V
=
nRT
P
=
(280.1312 x 0.08205736 x 294.2)
1.00 atm
=
6763 L
=
7000 L
due to only one significant figure in 4000 g.
how many atoms are in CaCI2
Answers
Answer:
4
Explanation:
bc Ca is 1 C is one L is two
In this particular case, an ion is merely an atom with a positive or negative charge. Since there are three ions that comprise CaCl₂, there are three atoms in a single unit of CaCl₂.
Do not confuse the C here for carbon and/or the I for iodine. There is no chemical element whose symbol is “L” (yet).
2. In pigeons, the allele B produces ash-red feathers. The allele b produces
blue feathers. The B allele is dominant to the ballele. A pigeon with
genotype Bb is crossed with a pigeon with genotype bb. What percent of
the offspring are expected to have ash-red feathers?
A. 0%
B. 25%
C. 50%
D. 100%
Answers
Answer:
it is C
Explanation:i had this on my test and got it right lol
Consider the water-gas-shift reaction: H2(8) + CO2(g) → H20() + CO(8) At high temperatures and low to moderate pressures the reacting species form an ideal-gas mixture. By Eq. (10.27): G= Ey;G; + RT Xy;lnyi When the Gibbs energies of the elements in their standard states are set equal to zero, G;= AG;; for each species, and then: G= Ey; AGj;+ RT Xy;lnyi (A) i i n At the beginning of Sec. 14.2 we noted that Eq. (12.3) is a criterion of equilibrium. Applied to the water-gas-shift reaction with the understanding that T and P are con- stant, this equation becomes: dG dn dG+ = d(nG) = ndG+ Gdn = 0 + G = 0 de de Here, however, dn/de = 0. The equilibrium criterion therefore becomes: dG = 0 (B) de = a Once the yi are eliminated in favor of ε, Eq. (A) relates G to ε. Data for AGf; for the compounds of interest are given with Ex. 14.13. For a temperature of 1000 K (the reaction is unaffected by P) and for a feed of 1 mol H2 and 1 mol CO2: (a) Determine the equilibrium value of ε by application of Eq. (B). (b) Plot G vs. ε, indicating the location of the equilibrium value of e determined in (a). દ,
Answers
The Gibbs free energy, G, for the mixture can be written as: G = Σyi * ΔGf;i + RT * Σyi * ln(yi). At equilibrium, the criterion is dG/dε = 0.
The given question asks to determine the equilibrium value of ε and plot G vs. ε for the water-gas-shift reaction at a temperature of 1000 K and a feed of 1 mol H2 and 1 mol CO2. To do this, we can use the equilibrium criterion equation (B) which states that dG/de = 0 at constant T and P. Using the data from Ex. 14.13 for AGf, we can eliminate yi in favor of ε in equation (A) and solve for G. Once we have G, we can differentiate with respect to ε to find the equilibrium value of ε. Finally, we can plot G vs. ε and locate the equilibrium value of ε. This will give us a visual representation of the equilibrium position of the reaction under the given conditions.
The water-gas-shift reaction is given by: H2(g) + CO2(g) → H2O(g) + CO(g). This reaction takes place at high temperatures and low to moderate pressures, with the reacting species forming an ideal-gas mixture. The Gibbs free energy, G, for the mixture can be written as: G = Σyi * ΔGf;i + RT * Σyi * ln(yi). At equilibrium, the criterion is dG/dε = 0.
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To find the range, identify the largest value and
the smallest value in the data set and find the
difference.
1, 2, 3, 3, 3, 4, 4, 4, 5, 7
What is the range of the data?
A. The largest value is 7 and the smallest value is 1. Find
the difference. 7-1-6 The range is 6.
B. The smallest value is 1. So the range is 1.
C. The largest value is 7. So the range is 7.
Answers
Answer:
A. The largest value is 7 and the smallest value is 1. Find the difference. 7 - 1 = 6.
Explanation:
Which of the following techniques can be applied to separate the components of a mixture?
Answers
Answer:
fractional distillation
filtering
evaporation
does sodium chloride retain any characteristic of sodium or chlorine?
Answers
Answer:
When this occurs, sodium will donate an electron (which is a negatively-charged particle) to chlorine. This makes sodium slightly positive and chlorine slightly negative. Opposite charges attract, right? So then, sodium ions will attract chloride ions and form an ionic bond.
Explanation:
What increases acidity more, nitrile group or chloride group?
Answers
Answer:
The nitrile group
Explanation:
The nitrile group contains the C≡N bond. It should be recalled that triple bond is highly electronegative and withdraws electrons from the C-H bond more effectively than the halogen atom.
The higher effectiveness of the C≡N bond at electron withdrawal greatly reduces the electron density of the C-H bond thereby making the hydrogen atom of the bond highly labile
The name for a positive ion is a ....
Answers
The name for a positive ion is a cation.
hope this helped
2 C2H6+7 O2⇒4 CO2+6 H2O is carbon balanced?
Answers
Answer:
To determine if the given chemical equation is carbon balanced, we need to count the number of carbon atoms in the reactants and compare it to the number of carbon atoms in the products.
Reactants:
2 C2H6 -> 4 carbon atoms
Products:
4 CO2 -> 4 carbon atoms
Since the number of carbon atoms on the reactant side is equal to the number of carbon atoms on the product side, we can conclude that the given chemical equation is carbon balanced.
TRUE/FALSEin a reaction with an enzyme has a low or small activation energy
Answers
True, in a reaction with an enzyme, the activation energy is typically low or small. Enzymes act as catalysts, lowering the activation energy required for a reaction to occur, thus increasing the reaction rate.
In a reaction catalyzed by an enzyme, the enzyme provides an alternative pathway with a lower activation energy for the reaction to occur. The activation energy is the minimum energy required for a reaction to occur, and enzymes lower this energy barrier, making it easier for the reaction to take place. This means that reactions catalyzed by enzymes can occur more quickly and efficiently than those that occur without enzyme catalysis. Therefore, it is true that a reaction with an enzyme has a low or small activation energy.
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What is the percentage composition of cobalt in cobalt(II) fluoride, CoF2?
Answers
Answer:
60.8%
Explanation:
We'll begin obtaining the molar mass of cobalt(II) fluoride, CoF2. This can be done as shown below:
Molar mass of CoF2 = 59 + (19x2) = 97g/mol.
The percentage composition of cobalt in cobalt(II) fluoride, CoF2 is given by:
Mass of Co/Molar Mass of CoF2 x 100
=> 59/97 x 100 = 60.8%
Therefore, the percentage composition of cobalt in cobalt(II) fluoride, CoF2 is 60.8%
URGENT HELP
26. A solution of hydrogen peroxide is 23.3% H2O2 by mass and has a density of 1.11
g/cm”. The molarity of the solution is:
a) 7.14 M
b) 0.259 M
c) 7.60 M
d) 7.93 M
e) none of these
Answers
What is the ground state configuration of calcium (Ca)?
Answers
The ground state configuration of calcium (Ca) is 1s2 2s2 2p6 3s2 3p6 4s2. The ground state configuration is the lowest energy state that an atom or molecule can occupy.
It is the electron configuration of an atom or molecule in its most stable form, corresponding to the minimum energy state. The least energetic and most stable configuration is the ground state configuration. An excited state configuration is a higher energy configuration (it requires energy input to create an excited state). The electrons used for bonding are called valence electrons. The primary quantum number (n), the orbital (s, p, d, or f), and the total number of electrons are used to represent electron configurations. The total number of electrons is expressed as a superscript.
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☆Only need information for problem 3 but you need to know the information from problem 2 to get answer 3☆
Answers
Answer:
2. The balanced equation is given below
2KClO₃ —> 2KCl + 3O₂
18 moles of oxygen, O₂ were obtained.
3. 21 moles of oxygen, O₂.
Explanation:
2. Determination of the number of mole of oxygen produced.
We'll begin by writing the balanced equation for the reaction. This is illustrated below:
2KClO₃ —> 2KCl + 3O₂
From the balanced equation above,
2 moles of KClO₃ decomposed to produce 3 moles of O₂.
Finally, we shall determine the number of mole oxygen, O₂ produced by the reaction of 12 moles of potassium chlorate, KClO₃. This can be obtained as follow:
From the balanced equation above,
2 moles of KClO₃ decomposed to produce 3 moles of O₂.
Therefore, 12 moles of KClO₃ will decompose to produce = (12 × 3)/2 = 18 moles of O₂.
Thus, 18 moles of oxygen, O₂ were obtained from the reaction
3. Determination of the number of mole of oxygen, O₂ produced by the reaction of 14 moles of KClO₃.
From the balanced equation above,
2 moles of KClO₃ decomposed to produce 3 moles of O₂.
Therefore, 14 moles of KClO₃ will decompose to produce = (14 × 3)/2 = 21 moles of O₂.
Thus, 21 moles of oxygen, O₂ were obtained from the reaction
Calculate the number of molecules in 64.5 grams of Nitrogen monoxide, NO
Answers
Answer:
N=9.933×10^23
Explanation:
\(n = \frac{m}{mr} \)
N=n×la
1. calculate the ph of a buffer solution made from equal amounts of 0.30 m hydrofluoric acid and 0.70 m sodium fluoride. ka=7.1×10−4
Answers
A buffer solution can resist a change in pH even when a strong acid or a strong base is added to it. A buffer solution is made up of a weak acid and its conjugate base, or a weak base and its conjugate acid.A hydrofluoric acid-sodium fluoride buffer solution can be made from hydrofluoric acid and sodium fluoride.
The buffer solution can be calculated as follows: Hydrofluoric acid is a weak acid, with a Ka of 7.1 × 10−4.Moles of Hydrofluoric acid (HF) = 0.30 × VolumefHF = [HF]/V = 0.30 mMoles of sodium fluoride (NaF) = 0.70 × VolumefNaF = [NaF]/V = 0.70 mMoles of Hydrogen Fluoride (H+) = Molarity × Volume = 0.30 × VolumepH = pKa + log ([A-]/[HA])Ka = [H+][A-]/[HA]7.1 × 10−4 = [H+][NaF]/[HF][H+] = 5.3 × 10−4[Naf]/[HF] = 7/3log [NaF]/[HF] = log (7/3) = 0.851pH = pKa + log ([A-]/[HA])pH = 3.86 + 0.851 = 4.71Therefore, the pH of a buffer solution made from equal amounts of 0.30 M hydrofluoric acid and 0.70 M sodium fluoride is 4.71.
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how many moles are in 37.5 g nitrogen
Answers
When taking ph measurements of solutions, why is it important to stir thoroughly after adding each reagent?.
Answers
HELPPP ASAPPPPP I WILL GIVE BRAINLIEST
Ocean currents contribute to global climates and occur due to differences in temperature, salinity, and density. WHY do you THINK these differences can cause currents to form?
Answers
Answer:
Its changes over time.
Explanation:
I think because each ocean current has a different temperature.
Answer:
Thermohaline circulation. This is a process driven by density differences in water due to temperature (thermo) and salinity variations in different parts of the ocean. Currents driven by thermohaline circulation occur at both deep and shallow ocean levels and move much slower than tidal or surface currents.
Sediments that have been cemented together become igneous rock. True or False?
Answers
Sediments that have been cemented together become igneous rock. false
The rock pieces called as sediments dropped from the wind and air to make a layer and this can be buried under other layers of sediments . after a long time sediments that have been cemented together become sedimentary rock. sedimentary rock can change into igneous rock and metamorphic rocks. sediments are pieces of solid material that have been deposited on earth surface. formation of sedimentary rocks begins when weathering and erosion produce sediments. so the statement Sediments that have been cemented together become igneous rock is a false statement.
Thus, Sediments that have been cemented together become igneous rock. false.
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