Search found 67 matches
- Fri Mar 15, 2019 7:09 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Adding Pt(s) to cell diagram
- Replies: 5
- Views: 527
Re: Adding Pt(s) to cell diagram
The one exception to this that Dr. Lavelle mentioned was mercury since it is a liquid at room temperature. Though it is a liquid, it can still conduct electrons and act as an electrode.
- Fri Mar 15, 2019 7:08 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Adding Pt(s) to cell diagram
- Replies: 5
- Views: 527
Re: Adding Pt(s) to cell diagram
A cell always has to have a conducting metal. If the reactants and products of the redox reaction are all aqueous, the electrons will not be transferred. In these scenarios you have to have an inert (one that does not take part in the reaction) electrode to attract the electrons/create a current.
- Fri Mar 15, 2019 7:06 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Cell Diagram
- Replies: 2
- Views: 304
Re: Cell Diagram
In a cell diagram, a comma is used to separate two species of the same state. Vertical lines are used to separate species if they are in different phases. Additionally, it is convention to put a vertical line after the electrode on the anode side and before the electrode on the cathode side; the ele...
- Fri Mar 15, 2019 1:19 am
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Reducing/Oxidizing Power
- Replies: 7
- Views: 2054
Re: Reducing/Oxidizing Power
Yes, higher oxidation power means more likely to gain electrons/be reduced. Therefore, the higher the standard reduction potential, which can be said to represent a substance's affinity for electrons, the greater the oxidizing power.
- Fri Mar 15, 2019 1:14 am
- Forum: General Rate Laws
- Topic: slow/fast steps
- Replies: 7
- Views: 622
Re: slow/fast steps
You will be given this information.
- Thu Mar 14, 2019 1:31 am
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Internal energy
- Replies: 2
- Views: 558
Re: Internal energy
Delta U for an isothermal reversible expansion is zero. These types of reactions usually take place in a heat reservoir. The energy that is lost when the system does work is replaced by heat energy from the surroundings. Therefore q and w are equal in magnitude and opposite in sign; q is positive si...
- Thu Mar 14, 2019 1:30 am
- Forum: Method of Initial Rates (To Determine n and k)
- Topic: Units of k
- Replies: 7
- Views: 1015
Re: Units of k
The units of k are different depending on reaction orders because the units for rate are always the same (mol x L -1 x s -1 ). Since the concentration of the reactants are raised to a power based on their particular order, the units may go up in exponents. For example since concentration is squared ...
- Thu Mar 14, 2019 1:25 am
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: Isothermal
- Replies: 5
- Views: 568
Re: Isothermal
Delta U for an isothermal reversible expansion is zero. These types of reactions usually take place in a heat reservoir. The energy that is lost when the system does work is replaced by heat energy from the surroundings. Therefore q and w are equal in magnitude and opposite in sign; q is positive si...
- Tue Mar 05, 2019 11:55 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Ecell
- Replies: 13
- Views: 1425
Re: Ecell
You have to find the two half-reactions in the standard potentials table. Then you would use the formula E(cell) = E(cathode) - E(anode). The cathode is the site of reduction and the anode is the site of oxidation.
- Tue Mar 05, 2019 11:54 pm
- Forum: Ideal Gases
- Topic: Water
- Replies: 13
- Views: 1030
Re: Water
Like others have said above, water can either be a solid, liquid or gas. However, it will never be aqueous since an aqueous solution is, by definition, one where the solvent is water. Water cannot be dissolved in itself (it cannot be both the solvent and the solute).
- Tue Mar 05, 2019 11:52 pm
- Forum: Kinetics vs. Thermodynamics Controlling a Reaction
- Topic: Electrolysis
- Replies: 4
- Views: 507
Re: Electrolysis
Electrolysis uses a current supplied by an external power source to force oxidation and reduction for a non-spontaneous reaction.
- Tue Mar 05, 2019 11:51 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Nerst Equation
- Replies: 4
- Views: 517
Re: Nerst Equation
The Nernst equation is most often used to find the cell potential at a certain point during the reaction. The equation uses the standard cell potential and Q. If two out of these three variables (cell potential, standard cell potential, reaction quotient/concentrations) are given in a problem, I wou...
- Tue Mar 05, 2019 11:49 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Concentration cells
- Replies: 6
- Views: 1422
Re: Concentration cells
A concentration cell is a cell in which the two half cells are identical except for their concentrations. Therefore, the overall reaction's standard cell potential is zero and the reaction is driven by the difference in concentration. For the reaction to be spontaneous, usually the anode (site of ox...
- Tue Feb 26, 2019 8:11 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Moles of electrons?
- Replies: 6
- Views: 554
Re: Moles of electrons?
I also usually balance the half reactions in order to see how many electrons need to be exchanged in order for them to cancel when you add the two half reactions together.
- Tue Feb 26, 2019 8:07 pm
- Forum: Balancing Redox Reactions
- Topic: Balancing Redox Reactions
- Replies: 3
- Views: 378
Re: Balancing Redox Reactions
He reversed it because copper was being oxidized in the reaction.
- Tue Feb 26, 2019 8:05 pm
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: Cell potential
- Replies: 2
- Views: 299
Re: Cell potential
No, cell potentials do not change based on stoichiometric coefficients. This is because a standard reduction potential is an intensive property, meaning that its value does not change based upon on the quantity of electrons/species reacting.
- Tue Feb 26, 2019 8:03 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Writing Cell Diagrams
- Replies: 3
- Views: 305
Re: Writing Cell Diagrams
Yes just like Joanna said above, you add an inert metal to act as an electrode when there isn't already a metal on both sides.
- Mon Feb 25, 2019 1:42 pm
- Forum: Balancing Redox Reactions
- Topic: Salt Bridges-won't they dissolve?
- Replies: 5
- Views: 766
Re: Salt Bridges-won't they dissolve?
The salt bridge isn't actually made out of salt. It is a tube with ions inside to prevent the charge build-up during the redox reaction. I believe that without a salt bridge, a positive charge would build up on the anode side and a negative charge on the cathode side which would preventing the react...
- Mon Feb 25, 2019 1:36 pm
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: Signs of delta G and E
- Replies: 4
- Views: 456
Re: Signs of delta G and E
For all spontaneous reactions delta G is negative. Therefore, using the Delta G = -nFE equation, we find that E has to be positive for Delta G to be negative. This is because F (Faraday's Constant) is a positive number and n (moles of electrons transferred during the reaction) will also be positive....
- Mon Feb 25, 2019 1:33 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Test 2 Topics
- Replies: 2
- Views: 306
Re: Test 2 Topics
Correct, Dr. Lavelle said this in lecture today.
- Mon Feb 25, 2019 1:33 pm
- Forum: Balancing Redox Reactions
- Topic: Balancing redox equations in acidic/basic solutions [ENDORSED]
- Replies: 3
- Views: 416
Re: Balancing redox equations in acidic/basic solutions [ENDORSED]
I believe so since there are HW assignments on this topic.
- Tue Feb 12, 2019 11:54 am
- Forum: Entropy Changes Due to Changes in Volume and Temperature
- Topic: Delta S = nC In (T2/T1)
- Replies: 2
- Views: 360
Re: Delta S = nC In (T2/T1)
The C in the equation from the textbook is most likely referring to the heat capacity, whereas the C in Dr. Lavelle's equation is the molar heat capacity (that's why you have to multiply by the number of moles)
- Tue Feb 12, 2019 11:52 am
- Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
- Topic: Extensive vs Intensive
- Replies: 5
- Views: 536
Re: Extensive vs Intensive
Like stated below, an extensive property is one that depends on the amount of matter present. Volume, mass and length are all examples of extensive properties. Intensive properties, on the other hand, are those that do no matter on the amount of matter present. Examples include density.
- Tue Feb 12, 2019 11:48 am
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: deltaU=0
- Replies: 3
- Views: 423
Re: deltaU=0
Delta U is equal to zero for an isothermal reversible reaction because the heat that is entering the system is equal in magnitude to the work that the system is doing. For example, if -1000 J of work is being done during an isothermal reversible reaction, then 1000 J of heat is entering the system. ...
- Sat Feb 09, 2019 1:10 pm
- Forum: Calculating Work of Expansion
- Topic: Units
- Replies: 7
- Views: 682
Re: Units
I usually always try to use atm since the most common gas constant is in terms of atm. Additionally, you can use 101.325 J = 1 L x atm to convert between energy and pressure/volume.
- Sat Feb 09, 2019 1:08 pm
- Forum: Calculating Work of Expansion
- Topic: Conversions to joules?
- Replies: 4
- Views: 757
Re: Conversions to joules?
There are two conversions you can use to get your answer in terms of energy (Joules). 1cm3 = 1L and 1 L x atm = 101.325 J. Hope this helps!
- Sat Feb 09, 2019 1:03 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: Midterm [ENDORSED]
- Replies: 49
- Views: 4716
Re: Midterm [ENDORSED]
I feel that the HW and Review Sessions are the best ways to prepare!
- Tue Jan 29, 2019 10:07 am
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: eq constants for acids
- Replies: 4
- Views: 440
Re: eq constants for acids
Strong acids do not have equilibrium constants because they dissociate completely.
- Tue Jan 29, 2019 10:05 am
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: Units of Kp
- Replies: 9
- Views: 3602
Re: Units of Kp
The units of the partial pressures of the gasses in Kp can be in bars or atm. However, it is important to remember that Kp as a whole does not have any units.
- Tue Jan 29, 2019 10:03 am
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Bond Enthalpies
- Replies: 7
- Views: 656
Re: Bond Enthalpies
Bond enthalpies are the least accurate way of measuring reaction enthalpies since they are an average of the different types of a specific bond.
- Sat Jan 19, 2019 12:32 pm
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: Understanding Q
- Replies: 9
- Views: 724
Re: Understanding Q
K>Q and K<Q is significant because it helps us understand whether the reaction has reached equilibrium or not. Since Q (the reaction quotient) is calculated at a specific time during the span of a reaction, by comparing it to K we can see if the reaction has to form more products or reactants to rea...
- Sat Jan 19, 2019 12:29 pm
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: Approximations
- Replies: 4
- Views: 394
Re: Approximations
You are able to approximate the value of x when the equilibrium constant is less than 10-3. We can approximate because x is extremely small relative to the initial value of the acid/base, so it will not substantially effect the equilibrium concentration of the acid/base.
- Sat Jan 19, 2019 12:24 pm
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: Strong vs Weak Acids
- Replies: 2
- Views: 166
Re: Strong vs Weak Acids
Yes, like Gavin said above, if the value of Ka or Kb is less than 10-3, then the acid/base is weak.
- Thu Jan 10, 2019 3:57 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Kc, Kp, K
- Replies: 3
- Views: 2738
Re: Kc, Kp, K
Essentially K c represents the equilibrium constant in terms of concentration (mol/L). You can use K c with aqueous solutions and gases since both aqueous solutions and gases have concentration. K p represents the equilibrium constant in terms of partial pressure and can only be used with gases sinc...
- Thu Jan 10, 2019 3:50 pm
- Forum: Ideal Gases
- Topic: Equilibrium Favoring
- Replies: 4
- Views: 180
Re: Equilibrium Favoring
When calculating the equilibrium constant, the products are in the numerator and the reactants are in the denominator. Therefore, the greater the concentrations/partial pressures of the products, the larger the equilibrium constant. When the equilibrium constant is greater than 10^3, we say that the...
- Thu Jan 10, 2019 3:47 pm
- Forum: Ideal Gases
- Topic: Equilibrium Constant and Reaction Quotient
- Replies: 3
- Views: 524
Re: Equilibrium Constant and Reaction Quotient
The reaction quotient and equilibrium constant are calculated in the same way. The reaction quotient (Q) represents a value at a random point during a reaction where as the equilibrium constant (K) represents a value at exactly equilibrium (when the rate of the forward reaction is equal to rate of t...
- Thu Dec 06, 2018 12:07 pm
- Forum: Administrative Questions and Class Announcements
- Topic: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen) [ENDORSED]
- Replies: 135
- Views: 38472
Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen) [ENDORSED]
On Worksheet 9, question #6, why would acid 2 be stronger than acid 4?
- Tue Dec 04, 2018 11:33 pm
- Forum: Naming
- Topic: Naming the metal
- Replies: 2
- Views: 235
Re: Naming the metal
You only add the suffix -ate to the end of the metal if the overall compound has a negative charge (in your question, the compound has a 4 - charge). I believe that the latin root of iron is ferr- so you would add -ate to the end of that. However, for other transition metals, the root isn't differen...
- Tue Dec 04, 2018 11:24 pm
- Forum: Biological Examples
- Topic: Ligands
- Replies: 7
- Views: 857
Re: Ligands
The central atom for a coordinate covalent compound is the transition metal/ion. The ligands are usually covalent molecules (water) or negatively charged ions (F-) that have a pair of electrons to donate.
- Fri Nov 30, 2018 6:23 pm
- Forum: Sigma & Pi Bonds
- Topic: Triple bond?
- Replies: 18
- Views: 1658
Re: Triple bond?
A triple bond has one sigma bond and two pi bonds.
- Fri Nov 30, 2018 6:21 pm
- Forum: Electronegativity
- Topic: Exceptions
- Replies: 7
- Views: 1047
Re: Exceptions
The general trend in electronegativity is that it increases diagonally from the bottom left corner of the periodic table up to fluorine (the most electronegative). In terms of this general trend, hydrogen can be considered an exception since it is on the left side of the periodic table but has an el...
- Fri Nov 30, 2018 6:17 pm
- Forum: Sigma & Pi Bonds
- Topic: Pi bond concepts
- Replies: 4
- Views: 355
Re: Pi bond concepts
Pi bonds are formed between two p orbitals that are perpendicular to the internuclear axis. For this reason, the two p orbitals overlap above and below the internuclear axis and cannot rotate. If you have the 7th edition of the textbook, Figure 2F.4 on page 118 is helpful for visualizing this bond.
- Fri Nov 23, 2018 12:11 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Test 3 Question
- Replies: 4
- Views: 490
Re: Test 3 Question
In addition to VSEPR and Hybridization, I believe it'll also cover intermolecular forces and polarity.
- Fri Nov 23, 2018 12:06 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Test 3
- Replies: 10
- Views: 939
Re: Test 3
Based on what we've learned so far, the homework questions, and the outline, I don't think so.
- Fri Nov 23, 2018 12:05 pm
- Forum: Balancing Chemical Reactions
- Topic: Why do we balance chemical equations?
- Replies: 13
- Views: 8371
Re: Why do we balance chemical equations?
I said that we balance them because of the law of conservation of mass which states that matter cannot be created nor destroyed.
- Wed Nov 21, 2018 6:39 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Lone Pairs on Axial vs. Equatorial Positions
- Replies: 2
- Views: 296
Lone Pairs on Axial vs. Equatorial Positions
The textbook on page 110 (7th edition) says that for an AX 3 E 2 molecule, the lone pairs occupy two of the three equatorial positions where as the lone pairs for an AX 4 E 2 occupy the two axial positions. Why wouldn't the two lone pairs on AX 3 E 2 occupy the two axial positions like the AX 4 E 2 ...
- Sat Nov 10, 2018 4:28 pm
- Forum: Ionic & Covalent Bonds
- Topic: Ionization Energies
- Replies: 13
- Views: 3575
Re: Ionization Energies
Yes, Helium has the highest ionization energy! This is because the electrons in helium are very close to the nucleus and so the electrostatic attraction is very high. This makes it difficult to remove an electron.
- Sat Nov 10, 2018 4:25 pm
- Forum: Dipole Moments
- Topic: VSPER
- Replies: 8
- Views: 910
Re: VSPER
VSEPR stands for Valence Shell Electron Pair Repulsion and it is used to help determine the geometrical shape of a particular molecule. Since electrons repel each other, VSEPR assumes that a molecule will have a shape that minimizes these repulsions. In class Dr. Lavelle said that lone pair-lone pai...
- Fri Nov 02, 2018 9:44 pm
- Forum: Electronegativity
- Topic: Electronegativity Calculation
- Replies: 5
- Views: 571
Re: Electronegativity Calculation
I don't think we've learned how to calculate it so we just have to estimate it based off of the periodic trend for electronegativity (Fluorine is the most electronegative).
- Fri Nov 02, 2018 9:43 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Valence Electrons - Are electrons in the d orbitals considered valence?
- Replies: 3
- Views: 5438
Valence Electrons - Are electrons in the d orbitals considered valence?
Do electrons in d orbitals count as valence electrons? I'm confused because d orbitals are written after the noble gas configuration but they're not the highest energy level (s & p will always be higher). For example how many valence electrons does Manganese (Mn) have and how many valence electr...
- Fri Nov 02, 2018 9:10 pm
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: Sig figs???
- Replies: 1
- Views: 335
Re: Sig figs???
You would use however many sig figs you used for your constants (h,c, etc.).
- Fri Nov 02, 2018 9:09 pm
- Forum: Octet Exceptions
- Topic: Radicals - On Which Element Does the Unpaired Electron Go?
- Replies: 2
- Views: 394
Radicals - On Which Element Does the Unpaired Electron Go?
Hi, I was wondering how you know which element the unpaired electron goes on for Radicals. For example, how do you know whether the unpaired goes on the Cl or O in the molecule ClO (question 2C.5 part (a) in the 7th edition)? Thanks in advance!
- Sun Oct 28, 2018 11:24 am
- Forum: Lewis Structures
- Topic: Losing Valence Electrons to Form Ions
- Replies: 1
- Views: 123
Losing Valence Electrons to Form Ions
Hi, I was wondering why copper can lose two electrons when it only has one electron in its outermost shell (4s). Wouldn't the ionization energy be extremely high to remove an electron from the 3d subshell?
- Sat Oct 27, 2018 10:58 am
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Effective Nuclear Charge vs. the Energy of a Shell
- Replies: 1
- Views: 174
Effective Nuclear Charge vs. the Energy of a Shell
Hi, I was wondering what the difference/relationship was between the effective nuclear charge experienced by an electron and the energies of the different shells (En) that the electrons are in (n=1, n=2, etc.). Thank you in advance!
- Fri Oct 26, 2018 7:21 pm
- Forum: Ionic & Covalent Bonds
- Topic: Exceptions
- Replies: 4
- Views: 492
Re: Exceptions
Yes, I have the same question! If someone could explain, that would be great!
- Sat Oct 20, 2018 4:35 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Topics We Need to Know for the Test [ENDORSED]
- Replies: 5
- Views: 499
Topics We Need to Know for the Test [ENDORSED]
Hi! I know in lecture on Friday that Dr. Lavelle said that we only need to know what was covered in lecture up until Friday for the test. Does that mean we do not need to know electron configurations and periodic trends for the test even though it is on the syllabus for the Quantum World? Just want ...
- Sat Oct 20, 2018 4:31 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Superscript
- Replies: 3
- Views: 272
Re: Superscript
Yes, like Michelle said above, a superscript indicates the number of electrons in that subshell.
- Sat Oct 20, 2018 4:29 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: P orbital
- Replies: 2
- Views: 265
Re: P orbital
Yes, Dr. Lavelle said that -1 is P x , 0 is P y , and 1 is p z . He also said that some books use the opposite convention and -1 is P z , 0 is P y , and 1 is p x . However, in either scenario, 0 is always P y . Determining which axes for P orbitals may appear on the test but not for D orbitals. Hope...
- Tue Oct 16, 2018 7:39 pm
- Forum: DeBroglie Equation
- Topic: Formulas
- Replies: 5
- Views: 499
Re: Formulas
The formulas and constants will be given to us on test day!
- Sat Oct 13, 2018 5:13 pm
- Forum: Properties of Light
- Topic: Wavelength Units
- Replies: 5
- Views: 429
Re: Wavelength Units
It is better to use meters during calculations so that you can ensure that your units cancel out properly (ex: 1 joule is kg x m^2 x s^-2). However, when writing your final answer, it is better to use nanometers so that you don't need scientific notation. Hope this helps!
- Sat Oct 13, 2018 1:02 pm
- Forum: Photoelectric Effect
- Topic: Units for the Work Function of a Metal
- Replies: 1
- Views: 292
Units for the Work Function of a Metal
I am working on the pre-assessment for the Photoelectric Module. On question #27, it says that the work function for sodium is 150.6 KJ.mol^-1. However, I thought that the units for the work function is supposed to be just J. Do I need to convert KJ to J and then convert the mol^-1 to per Na atom? I...
- Sat Oct 13, 2018 12:39 pm
- Forum: Einstein Equation
- Topic: Units for v(frequency)
- Replies: 11
- Views: 1210
Re: Units for v(frequency)
Hertz and s^-1 can be used interchangeably. Hertz is the unit for frequency which can be written and thought of as cycles/second. Thus Hertz and 1/second are the same.
- Tue Oct 09, 2018 9:12 pm
- Forum: Administrative Questions and Class Announcements
- Topic: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen) [ENDORSED]
- Replies: 135
- Views: 38472
Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen) [ENDORSED]
I've been looking for more practice!! Thank you so much for posting this - it's very helpful!
- Sun Oct 07, 2018 5:47 pm
- Forum: Significant Figures
- Topic: Decimal point
- Replies: 14
- Views: 830
Re: Decimal point
120. definitely has 3 significant figures. 120 (without the decimal point) however is ambiguous and therefore it is better to use scientific notation: 1.20 x 10^2 (this would definitely have 3 significant figures).
- Wed Oct 03, 2018 4:49 pm
- Forum: SI Units, Unit Conversions
- Topic: state of compounds
- Replies: 3
- Views: 427
Re: state of compounds
I think that in a recent lecture Dr. Lavelle said that he would like us to put the states of each compound in the chemical equation.
- Wed Oct 03, 2018 4:44 pm
- Forum: Significant Figures
- Topic: Rules For Significant Figures
- Replies: 6
- Views: 869
Re: Rules For Significant Figures
These are the rules that I learned and use when determining how many significant figures are in a value: 1. All nonzero digits are significant (ex: 345.23 has 5 significant figures) 2. Zeroes between between two nonzero digits are significant (ex: 103.106 has six significant figures) 3. Zeroes to th...
- Wed Oct 03, 2018 4:34 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Advice from a Medical Student [ENDORSED]
- Replies: 297
- Views: 382956
Re: Advice from a Medical Student [ENDORSED]
Hi Ashley!
Thank you so much for posting this! I will definitely take your advice.
Thank you so much for posting this! I will definitely take your advice.