Search found 72 matches
- Thu Mar 15, 2018 6:21 pm
- Forum: Phase Changes & Related Calculations
- Topic: 9.19
- Replies: 1
- Views: 367
Re: 9.19
The three steps are required as water must be heated to 100 C to vaporize, and then it must be vaporized. Since, they're asking for the final vapor to be at 85 C you need to add another entropy change from the vapor at 100 C to 85 C. All this is required since water doesn't vaporize at a 100 degrees...
- Thu Mar 15, 2018 6:01 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: 14.15.a
- Replies: 1
- Views: 281
14.15.a
When writing the cell diagram, shouldn't Br- be written before AgBr as the reaction at the anode is going from Br- to AgBr?
- Thu Mar 15, 2018 4:31 pm
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: 14.93.a
- Replies: 1
- Views: 263
14.93.a
If you were to construct a concentration cell in which one half-cell contains 1.0 m CrCl3 and the other half-cell contains 0.0010 m CrCl3, and both electrodes were chromium, at which electrode would reduction take place spontaneously? Why does reduction take place at the electrode with the higher co...
- Tue Mar 06, 2018 1:29 pm
- Forum: First Order Reactions
- Topic: 15.37
- Replies: 3
- Views: 496
15.37
In part (c), the mass is taken as the concentration because the vessel is sealed. But why is this true?
- Tue Mar 06, 2018 12:00 pm
- Forum: General Rate Laws
- Topic: Rate of formation/consumption
- Replies: 3
- Views: 3978
Rate of formation/consumption
When calculating the rate of formation/consumption, do we take the concentrations of the reactants or products or both?
- Tue Mar 06, 2018 11:53 am
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: reaction mechanism
- Replies: 1
- Views: 251
reaction mechanism
Will we be told if an elementary step is a fast or slow one? And do we always assume pre-equilibrium conditions?
- Tue Mar 06, 2018 11:01 am
- Forum: General Rate Laws
- Topic: Molecularity vs Order
- Replies: 1
- Views: 255
Molecularity vs Order
Is the molecularity and order the same for elementary reactions and the overall reaction? If not, what's the difference?
- Tue Feb 27, 2018 7:28 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Cell diagram order
- Replies: 4
- Views: 460
Cell diagram order
In a cell diagram, is there any specific order in which we write the redox couple in the same phase?
- Tue Feb 27, 2018 7:26 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Cell potential
- Replies: 5
- Views: 635
Cell potential
When trying to figure whether a redox couple forms the anode or cathode, do we first like for sign or whether electrons are consumed or given off?
There were some examples in the textbook in which, though the sign was negative, the redox couple formed the cathode.
There were some examples in the textbook in which, though the sign was negative, the redox couple formed the cathode.
- Tue Feb 27, 2018 7:14 pm
- Forum: General Rate Laws
- Topic: Orders and units
- Replies: 3
- Views: 539
Re: Orders and units
First order is:
k=rate/[A]
Second order reaction:
k=rate/[A]^2
Third order reaction:
k=rate/[A]^3
We measure concentration as mol/L, hence, for reactions of a different order it is (mol/L)^order.
k=rate/[A]
Second order reaction:
k=rate/[A]^2
Third order reaction:
k=rate/[A]^3
We measure concentration as mol/L, hence, for reactions of a different order it is (mol/L)^order.
- Mon Feb 19, 2018 12:38 pm
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: 14.23A
- Replies: 1
- Views: 314
Re: 14.23A
I'm not really sure why but my TA said that we don't flip potentials because the redox couple is the same.
- Mon Feb 19, 2018 12:23 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: oxi/red potentials
- Replies: 1
- Views: 400
oxi/red potentials
Suppose two redox couples have negative potentials, is there any case in which the more negative one can undergo reduction?
- Mon Feb 19, 2018 12:19 pm
- Forum: Balancing Redox Reactions
- Topic: Balancing H
- Replies: 2
- Views: 408
Balancing H
In basic solutions, after balancing O, do we balance hydrogen by adding an equal number of hydrogens to the other side by adding water or do we add an equal number of H20 to the number of hydrogens?
ex: if there are 6H on the right, do we add 3H to the left or 6H20?
ex: if there are 6H on the right, do we add 3H to the left or 6H20?
- Mon Feb 12, 2018 5:16 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: 11.99 (a)
- Replies: 1
- Views: 240
11.99 (a)
Why is it that in this problem we take 1/2 of delta G as the answer for the production of 1 mole of X rather than dividing K by 1/2?
- Mon Feb 12, 2018 11:28 am
- Forum: Calculating Standard Reaction Entropies (e.g. , Using Standard Molar Entropies)
- Topic: Molar entropies
- Replies: 5
- Views: 840
Re: Molar entropies
They are molar entropies taken under standard conditions with pure forms of the substance. (1 bar and usually, 298K unless specified otherwise)
- Mon Feb 12, 2018 11:26 am
- Forum: Calculating Standard Reaction Entropies (e.g. , Using Standard Molar Entropies)
- Topic: 9.38 (d)
- Replies: 1
- Views: 250
9.38 (d)
How are the products of the reaction: 4KClO3(s) ---> 3KClO4(s) + KCL(s), more ordered than the reactants?
- Mon Feb 12, 2018 11:25 am
- Forum: Entropy Changes Due to Changes in Volume and Temperature
- Topic: 9.31
- Replies: 1
- Views: 246
9.31
Why do we take C(v) and not C(p) when the volume is changing?
- Sun Feb 11, 2018 8:07 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: Which is more stable: Fe3O4 or Fe2O3?
- Replies: 2
- Views: 850
Which is more stable: Fe3O4 or Fe2O3?
The solutions manual says Fe2O3 is more stable, but since the G of formation is more negative for Fe3O4 , isn't it more stable? Also since Fe3O4 is a larger compound, shouldn't it be more stable?
- Tue Feb 06, 2018 11:09 am
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: Tendency of processes
- Replies: 2
- Views: 331
Tendency of processes
Do reactions/processes tend to go towards a lower gibbs free energy or a higher energy and why?
- Tue Feb 06, 2018 11:04 am
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: Gibbs Free energy
- Replies: 1
- Views: 280
Gibbs Free energy
In the textbook it says the Gibbs free energy of the solid phase lies the lowest. If the entropy of a gas is the highest (compared to liquids and solids), shouldn't the free energy of the gas be the lowest at a certain temperature?
- Tue Feb 06, 2018 11:00 am
- Forum: Entropy Changes Due to Changes in Volume and Temperature
- Topic: Boltzmann Equation
- Replies: 2
- Views: 258
Re: Boltzmann Equation
Kb is equal to 1.381 x 10^-23 J/K
- Tue Feb 06, 2018 10:58 am
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: Gibbs energy for gas and liquid phase
- Replies: 1
- Views: 280
Gibbs energy for gas and liquid phase
Why does the Gibbs free energy decrease more sharply with temperature for a gas than for the liquid?
- Fri Feb 02, 2018 3:45 pm
- Forum: Third Law of Thermodynamics (For a Unique Ground State (W=1): S -> 0 as T -> 0) and Calculations Using Boltzmann Equation for Entropy
- Topic: Residual Entropy [ENDORSED]
- Replies: 2
- Views: 519
Residual Entropy [ENDORSED]
Why is it that molecules with a greater dipole moment have smaller residual entropies?
- Fri Feb 02, 2018 3:28 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Quiz 1, #1
- Replies: 2
- Views: 425
Quiz 1, #1
On quiz 1, question 1, there was a question like "Do you expect there to be a difference in your answers in part 'a' and 'b'? Why?" What's the reason that there won't be a difference?
- Fri Feb 02, 2018 3:06 pm
- Forum: Entropy Changes Due to Changes in Volume and Temperature
- Topic: Change in vol and temp
- Replies: 2
- Views: 377
Change in vol and temp
What formula (for entropy) do we use if there is a change in both volume and temperature?
- Fri Feb 02, 2018 2:54 pm
- Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
- Topic: Free expansion
- Replies: 2
- Views: 455
Free expansion
If q=0, and work is different in two conditions (one of which is free expansion and the other one isn't), then U will be different in both cases. Isn't this against the statement that U is a state function?
- Fri Feb 02, 2018 2:40 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: Nonspontaneous processes
- Replies: 2
- Views: 461
Nonspontaneous processes
Can non-spontaneous processes only be done by work or also heat?
- Wed Jan 24, 2018 5:01 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Heat capacity
- Replies: 2
- Views: 382
Heat capacity
What exactly does heat capacity tell you? (apart what the formula states) like, what does a large heat capacity suggest?
- Wed Jan 24, 2018 2:05 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: 8.117 [ENDORSED]
- Replies: 1
- Views: 172
8.117 [ENDORSED]
The net production of moles of gas(delta n) is 2/3 moles in the solutions manual, but wouldn't it only be 2?
- Wed Jan 24, 2018 10:45 am
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: 8.63
- Replies: 4
- Views: 579
Re: 8.63
The enthalpy of formation of liquid in it's liquid state is -285.85 kJ/mol
- Fri Jan 19, 2018 8:36 pm
- Forum: Phase Changes & Related Calculations
- Topic: Closed Systems [ENDORSED]
- Replies: 8
- Views: 1171
Closed Systems [ENDORSED]
What's a method to increase the internal energy of a closed system?
- Fri Jan 19, 2018 6:50 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Heat capacity of dilute solutions [ENDORSED]
- Replies: 1
- Views: 198
Heat capacity of dilute solutions [ENDORSED]
The textbook says 'the specific heat capacity' of dilute solutions is taken to be the same as the pure solvent'. Why isn't this true for molar heat capacity?
- Fri Jan 19, 2018 6:47 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: C(v) and C(p)
- Replies: 3
- Views: 254
Re: C(v) and C(p)
Do you mean Cv is equal to dU?
- Fri Jan 19, 2018 6:45 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Diathermic walls
- Replies: 3
- Views: 945
Diathermic walls
Can someone explain what diathermic walls are? I don't understand the definition in the textbook.
- Fri Jan 19, 2018 10:29 am
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Gas molar heat capacity [ENDORSED]
- Replies: 4
- Views: 541
Re: Gas molar heat capacity [ENDORSED]
One is under constant volume, and the other under constant pressure.
- Fri Jan 19, 2018 10:28 am
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: C(v) and C(p)
- Replies: 3
- Views: 254
C(v) and C(p)
Why is that C(under constant pressure) is greater than C(under constant volume) for gases and not liquids and solids?
- Sat Dec 09, 2017 5:41 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Effect of water
- Replies: 2
- Views: 344
Effect of water
Does removing/adding water(or anything in the 'l' or 'aq' phase) or increasing the pressure of water (or anything in the 'l' or 'aq' phase) have any effect on which direction the reaction will proceed?
- Thu Dec 07, 2017 6:05 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Pi bond
- Replies: 3
- Views: 563
Pi bond
According to the VSEPR theory, does a pi bond have localized or de-localized electrons, and why?
- Tue Dec 05, 2017 7:18 pm
- Forum: Properties & Structures of Inorganic & Organic Acids
- Topic: Electron withdrawing power
- Replies: 1
- Views: 305
Electron withdrawing power
In a carboxylic acid, which Oxygen has the electron withdrawing power?
- Tue Dec 05, 2017 6:40 pm
- Forum: Acidity & Basicity Constants and The Conjugate Seesaw
- Topic: Acid and Base equations
- Replies: 2
- Views: 431
Re: Acid and Base equations
The ionic equation includes all ions involved in the reaction and the net ionic equation is what you get after cancelling on both sides of the ionic equation
- Tue Dec 05, 2017 5:30 pm
- Forum: Properties & Structures of Inorganic & Organic Bases
- Topic: CH3COOH
- Replies: 3
- Views: 1902
Re: CH3COOH
It will only ever donate the last H because this is the only acidic hydrogen present in the compound.
- Thu Nov 30, 2017 8:25 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: P4
- Replies: 2
- Views: 465
P4
Is p4 polar or non-polar, and why?
- Thu Nov 30, 2017 5:31 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Effect of pressure [ENDORSED]
- Replies: 1
- Views: 227
Effect of pressure [ENDORSED]
If one starts with a higher pressure of reactant, the equilibrium constant will be larger.
Why is this false?
Why is this false?
- Wed Nov 29, 2017 8:43 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Bond angle
- Replies: 1
- Views: 267
Bond angle
According the solutions manual, the bond angle of ClO2+ is slightly less than 120 degrees and its electron arrangement is trigonal planar.
But since there are two lone pairs on the chlorine atom, shouldn't it be tetrahedral and slightly less than 90 degrees?
But since there are two lone pairs on the chlorine atom, shouldn't it be tetrahedral and slightly less than 90 degrees?
- Tue Nov 28, 2017 10:09 pm
- Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
- Topic: Heteronuclear diatomic species
- Replies: 1
- Views: 376
Heteronuclear diatomic species
How do you draw the molecular orbital energy level diagram for 2 atoms that combine from different periods (as their valence electrons belong to different shells)?
- Tue Nov 28, 2017 10:06 pm
- Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
- Topic: Energy levels
- Replies: 2
- Views: 464
Energy levels
Why is the order of energy levels different in n2 from o2 and f2?
- Tue Nov 28, 2017 4:52 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: SF6
- Replies: 1
- Views: 281
SF6
The bond angles of sf6 are said to be 90 and 180 from the textbook, but since it's octahedral, wouldn't it only be 90?
- Fri Nov 24, 2017 10:15 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: IF7
- Replies: 2
- Views: 642
Re: IF7
It is pentagonal bipyramidal.
- Fri Nov 24, 2017 10:14 pm
- Forum: Naming
- Topic: Cyano vs Cyanido
- Replies: 3
- Views: 366
Re: Cyano vs Cyanido
Both are acceptable. Cyano is just an older term.
- Thu Nov 23, 2017 10:41 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Expanded octet
- Replies: 6
- Views: 663
Expanded octet
How would you know whether an atom has an expanded octet?
- Sun Nov 19, 2017 11:56 am
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Polydentate
- Replies: 3
- Views: 245
Re: Polydentate
If a ligand has more than one donor atom (an atom that can bond with the central metal atom) it is polydentate.
- Sun Nov 19, 2017 11:54 am
- Forum: Lewis Structures
- Topic: Best way to start Lewis Structures
- Replies: 12
- Views: 1224
Re: Best way to start Lewis Structures
I would say draw electrons and then bonds!
- Mon Nov 06, 2017 10:02 pm
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: H- atom equation for other elements
- Replies: 1
- Views: 256
Re: H- atom equation for other elements
multiply the energy by atomic number (Z) squared!
- Mon Nov 06, 2017 10:40 am
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Energy of subshells
- Replies: 2
- Views: 348
Energy of subshells
Does 4d or 5s have a greater energy and why?
- Thu Nov 02, 2017 9:11 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Valence electrons
- Replies: 3
- Views: 553
Valence electrons
Why is the number of valence electrons for silver 11 and not 1 as 5 is the outermost shell?
N: 1s2,2s2,2p6,3s2,3p6,3d10,4s2,4p6,4d10,5s1
N: 1s2,2s2,2p6,3s2,3p6,3d10,4s2,4p6,4d10,5s1
- Thu Nov 02, 2017 6:19 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: Core, Closed shell, and valence electrons
- Replies: 2
- Views: 513
Core, Closed shell, and valence electrons
Are valence electrons the electrons in the outermost orbital or shell?
Is the inner core basically all the closed shells?
Is the inner core basically all the closed shells?
- Thu Nov 02, 2017 4:38 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Quantum Numbers
- Replies: 3
- Views: 257
Re: Quantum Numbers
l can go to a higher level but we're not dealing with them in this class.
- Thu Nov 02, 2017 4:13 pm
- Forum: Trends in The Periodic Table
- Topic: Diagonal relationships
- Replies: 1
- Views: 203
Diagonal relationships
What gives rise to diagonal relationships?
- Tue Oct 24, 2017 12:38 pm
- Forum: *Shrodinger Equation
- Topic: Hψ
- Replies: 4
- Views: 753
Re:Hψ
Hψ represents hamiltonian and is equal to the sum of the potential and kinetic energy.
- Mon Oct 23, 2017 11:06 pm
- Forum: Trends in The Periodic Table
- Topic: Trends of ionic radius
- Replies: 4
- Views: 725
Trends of ionic radius
Why is the following true:
Cations are smaller than their parent atoms, whereas anions are larger.
Cations are smaller than their parent atoms, whereas anions are larger.
- Thu Oct 19, 2017 5:34 pm
- Forum: Photoelectric Effect
- Topic: Textbook 1.38
- Replies: 1
- Views: 257
Textbook 1.38
What is the wavelength of an electron when the distance it travels in 1 s is equal to its wavelength?
- Tue Oct 17, 2017 7:47 pm
- Forum: Photoelectric Effect
- Topic: Photoelectric Effect as Proof of Particle Qualities of Light
- Replies: 3
- Views: 726
Re: Photoelectric Effect as Proof of Particle Qualities of Light
A photon is causing the ejection of an electron which is a particle and hence, proving the particle nature of light.
- Tue Oct 17, 2017 7:46 pm
- Forum: Properties of Electrons
- Topic: Rydberg's formula
- Replies: 6
- Views: 1045
Re: Reinberg's formula
Different levels signify the different energies the electrons will possess when in that level. Rydberg's equation correlates energy levels with the frequency of the electron in that level. It depends on the question. Sometimes, they may want you to find out the initial or final energy level using th...
- Tue Oct 17, 2017 7:44 pm
- Forum: DeBroglie Equation
- Topic: 1.39 Help
- Replies: 5
- Views: 634
Re: 1.39 Help
Hey,
So first convert the mass into kgs and the mph to m/s so they're in SI units.
Then use De Broglie's equation:
L=h/p or L=h/mv
We know the mass and velocity.
h ---> Planck's constant
So first convert the mass into kgs and the mph to m/s so they're in SI units.
Then use De Broglie's equation:
L=h/p or L=h/mv
We know the mass and velocity.
h ---> Planck's constant
- Sat Oct 14, 2017 7:28 pm
- Forum: Properties of Light
- Topic: Excitation of electrons
- Replies: 5
- Views: 560
Excitation of electrons
If 1 million photons in the UV region are absorbed by a hydrogen gas sample how many electrons are excited to a higher energy level?
a.zero
b.500,00
c.1
d.1 million
a.zero
b.500,00
c.1
d.1 million
- Sat Oct 14, 2017 2:19 pm
- Forum: Properties of Light
- Topic: 1.3 homework [ENDORSED]
- Replies: 11
- Views: 1297
Re: 1.3 homework [ENDORSED]
A) no, speed of radiation, c, is always 3 x 10(to the power 8) B) no, Frequency is inversely proportional to wavelength, and so, if the frequency decreases, wavelength should increase C) yes, as the wave gets wider when frequency decreases, the wave is less susceptible to change in electric field. D...
- Thu Oct 12, 2017 11:17 am
- Forum: Properties of Electrons
- Topic: Electrons and photons [ENDORSED]
- Replies: 1
- Views: 301
Electrons and photons [ENDORSED]
Suppose the energies of levels are as follows: n=1, E=-13.6 eV n=2, E=-3.4 eV n=3, E=-1.51 eV A photon of energy 11 eV, which is slightly greater than the difference between the energies of level 1 an 2, will the electron jump to the 2nd level from the first or will it remain in the 1st level as the...
- Mon Oct 09, 2017 12:37 pm
- Forum: Student Social/Study Group
- Topic: Online lectures
- Replies: 1
- Views: 516
Online lectures
Hey
Does anyone know where we can view the lectures and our grades?
Does anyone know where we can view the lectures and our grades?
- Sun Oct 08, 2017 4:31 pm
- Forum: Photoelectric Effect
- Topic: Post-assessment problem
- Replies: 3
- Views: 341
Post-assessment problem
Light hits a sodium metal surface and the velocity of the ejected electron is 6.61 x 105 m.s-1. The work function for sodium is 150.6 kJ.mol-1. a. What is the KE? b. How much is the energy required to remove an electron from one sodium atom? c. What is the frequency of the incident light? Don't we n...
- Sun Oct 08, 2017 12:24 pm
- Forum: Photoelectric Effect
- Topic: Units for photoelectric effect
- Replies: 2
- Views: 286
Re: Units for photoelectric effect
Plancks constant unit : J s
Frequency: Hertz (Hz)
KE: Joules (J)
Work function: Joules (J)
Frequency: Hertz (Hz)
KE: Joules (J)
Work function: Joules (J)
- Sun Oct 08, 2017 12:19 pm
- Forum: Molarity, Solutions, Dilutions
- Topic: G25
- Replies: 1
- Views: 273
G25
Practitioners of the branch of alternative medicine known as homeopathy claim that very dilute solutions of substances can have an affect. Is this claim plausible? To explore this question, suppose that you prepare a solution of an active substance X, with a molarity of 0.10 mol per liter. Then you ...
- Mon Oct 02, 2017 7:49 pm
- Forum: Molarity, Solutions, Dilutions
- Topic: G5 from fundamentals!
- Replies: 3
- Views: 641
G5 from fundamentals!
So I used the formula m(initial) x v(initial) = m(final) x v(final) and substituted the following:
m(initial) = 0.079 M
v(initial) = 250 ml
m(final) = 2.15 x 10 (to the power -3)
But in the solutions manual they didn't have the v(initial) anywhere.
Please help!!
m(initial) = 0.079 M
v(initial) = 250 ml
m(final) = 2.15 x 10 (to the power -3)
But in the solutions manual they didn't have the v(initial) anywhere.
Please help!!