## Search found 32 matches

Sat Mar 12, 2016 1:33 pm
Forum: *Alkanes and Substituted Alkanes (Staggered, Eclipsed, Gauche, Anti, Newman Projections)
Topic: Ch3 in Newman projection
Replies: 1
Views: 336

### Re: Ch3 in Newman projection

both, because both sides have a CH3 branching off since there are no substituents, etc. So in a newman projection, you would draw them on opposite ends to draw the most stable conformation
Sat Mar 12, 2016 1:30 pm
Forum: *Alkanes and Substituted Alkanes (Staggered, Eclipsed, Gauche, Anti, Newman Projections)
Topic: Conformational Energy Diagrams
Replies: 2
Views: 460

### Re: Conformational Energy Diagrams

i think we just have to know equatorial, staggered, etc.
Sat Mar 12, 2016 1:30 pm
Forum: *Alkanes and Substituted Alkanes (Staggered, Eclipsed, Gauche, Anti, Newman Projections)
Topic: Torsional strain
Replies: 4
Views: 683

### Re: Torsional strain

not possible to have negative strain, but it is possible to have little to no strain
Sat Mar 12, 2016 1:27 pm
Forum: General Rate Laws
Topic: Intermediates
Replies: 3
Views: 512

### Re: Intermediates

simpler terms: a+b-->c
c+d-->d
C is intermediate because it's made in the first reaction and automatically used up in the second
Sat Mar 12, 2016 1:26 pm
Forum: General Rate Laws
Topic: Rate Order
Replies: 2
Views: 376

### Re: Rate Order

yes, this would be considered something like a half-order which would be (ex: X^1/2
Sat Mar 12, 2016 1:25 pm
Forum: General Rate Laws
Topic: rate law
Replies: 1
Views: 300

### Re: rate law

Yes, coefficient goes as exponent of coefficient
Thu Mar 10, 2016 2:19 am
Forum: *Electrophiles
Topic: Equal sign with a line through it
Replies: 4
Views: 1203

### Re: Equal sign with a line through it

it could refer to double dagger (like delta g double dagger which is used to find pseudo equilibrium point
Thu Mar 10, 2016 2:16 am
Forum: *Cyclohexanes (Chair, Boat, Geometric Isomers)
Topic: Stability
Replies: 2
Views: 335

### Re: Stability

no (due to the steric straining in the boat formation). The boat flagpole interactions has more steric strain making it less stable.
Thu Mar 10, 2016 2:13 am
Forum: *Cyclohexanes (Chair, Boat, Geometric Isomers)
Topic: Trans vs Cis stablity
Replies: 3
Views: 467

### Re: Trans vs Cis stablity

trans would probably always be more stable because say you have something like a br coming off of carbon 1, then making the isomer trans would allow for the br to be in an equatorial position and have less steric strain
Thu Mar 10, 2016 2:11 am
Forum: *Cyclopentanes
Topic: cyclohexane newman projection
Replies: 2
Views: 892

### cyclohexane newman projection

For a cyclopentane newman projection, would you draw 2 newman circles and connect them or just one?
Thu Mar 10, 2016 2:09 am
Forum: Stereochemistry in Organic Compounds (Chirality, Stereoisomers, R/S, d/l, Fischer Projections)
Topic: What is optically active?
Replies: 3
Views: 5776

### Re: What is optically active?

Does this coincide at all with eclipsed and staggered forms?
Thu Mar 03, 2016 9:58 pm
Forum: *Cycloalkanes
Topic: Alphabetic Order or Atomic Number?
Replies: 2
Views: 447

### Re: Alphabetic Order or Atomic Number?

alphabetical
Fri Feb 05, 2016 5:37 pm
Forum: Phase Changes & Related Calculations
Topic: Heat curve related to Entropy
Replies: 1
Views: 386

### Heat curve related to Entropy

For the question on the quiz that said asked about changing the gas back to an ice cube, what equations would you use to determine the total entropy change when the phases change?
Fri Feb 05, 2016 5:34 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Electrolysis
Replies: 1
Views: 300

### Electrolysis

Can someone explain the difference between a galvanic cell, a concentration cell, and electrolysis
Fri Jan 22, 2016 10:21 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: 8.49 T value
Replies: 1
Views: 240

### Re: 8.49 T value

t is found to be the temperature given at that particular state
Fri Jan 22, 2016 10:14 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Heat Curve
Replies: 1
Views: 273

### Heat Curve

to get from a block of ice to water vapor, what equations would you use? (i think there are 5 steps)
Fri Jan 22, 2016 10:10 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Q's
Replies: 1
Views: 412

### Q's

Can someone explain to me the process of qsys=-qsurr
Fri Jan 22, 2016 10:08 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: What is "d"?
Replies: 2
Views: 377

### Re: What is "d"?

Well if it represents small changes, that's basically saying that yes, it represents delta T/v
Fri Jan 22, 2016 10:00 pm
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: Entropy Equations
Replies: 1
Views: 295

### Entropy Equations

For contant t and contant p in the entropy equations, how do you know which variant to use when in the problem they don't give you either?
Fri Jan 22, 2016 9:59 pm
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: Internal Energy relation to Entropy
Replies: 2
Views: 313

### Re: Internal Energy relation to Entropy

deltaU=0, so q=-w for ideal gas isothermal expansion!
Fri Jan 22, 2016 9:57 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: Work
Replies: 2
Views: 360

### Work

for the problem "calculate the work for a system that releases 346 jK of heat in a process for which the decrease in internal energy is 125 kj. is work done on or by the system?" so i calculated it and the answer was w=221 kJ, but how do you know if work was done on or by the system?
Fri Dec 04, 2015 7:54 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Q and K
Replies: 2
Views: 387

### Re: Q and K

There is an easy way to tell which way the reactant will go! ok, so K comes before q in the alphabet. So set up your inequality always k > q or k<q. Then, draw a line connecting to the way of the alligator sign. Then you get an arrow that lets you know which way the reaction is going to go! So, if k...
Fri Dec 04, 2015 7:51 pm
Forum: Calculating the pH of Salt Solutions
Topic: Why is H-H Equation an approximation
Replies: 2
Views: 736

### Re: Why is H-H Equation an approximation

strong acid weak base has a buffer zone (buffer resist ph change), as opposed to strong acid strong base titration
Tue Dec 01, 2015 10:50 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: video: finding velocity with given position
Replies: 1
Views: 1640

### video: finding velocity with given position

video
Thu Nov 19, 2015 12:10 am
Forum: Equilibrium Constants & Calculating Concentrations
Topic: equilibrium, volume, and concentration
Replies: 1
Views: 211

### equilibrium, volume, and concentration

HCL + I2 <--> HI + CL2, how will an increase in the pressure by decreasing the volume effect the concentration of CL2?
Thu Nov 19, 2015 12:09 am
Forum: Equilibrium Constants & Calculating Concentrations
Topic: how will equilibrium shift
Replies: 3
Views: 424

### how will equilibrium shift

4 NH3 + 3O2 <-> 6H20 + 2N2
can someone explain to me what the equilibrium shift will be if the volume is increased?
Fri Nov 13, 2015 10:36 am
Forum: Shape, Structure, Coordination Number, Ligands
Topic: When to use bi-, tri- vs. bis-, tris-?
Replies: 3
Views: 3038

### Re: When to use bi-, tri- vs. bis-, tris-?

a common example is ethylenediamine! if there are 2 it would be called bis(en) because of the (di) in (diamond), and if there were 3 it would be tris(en)
Fri Nov 13, 2015 10:33 am
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Ethylenediamine polydentate
Replies: 2
Views: 528

### Re: Ethylenediamine polydentate

Bidentate ligands have two donor atoms which allow them to bind to a central metal atom or ion at two points. So in this case, en has 2 carbon as the central atoms. I guess you could look at the (di) in (diamond) and determine that there are 2 nitrogen that have to bond to 2 central atoms to determi...
Fri Nov 06, 2015 2:11 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Polarity of O3
Replies: 3
Views: 4907

### Re: Polarity of O3

O3 is polar because there are 18 valence electrons, so the lewis structure would position the central O connected to one single bond and one double bond to connect the other O's. The loan pair on the central O would also mean the molecule was bent, thus making it polar.
Fri Nov 06, 2015 2:06 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: AX2E3 Shape
Replies: 7
Views: 1908

### Re: AX2E3 Shape

Ax2E3 resides under the pattern for structures with FIVE regions of electron density, so the pattern would go: tragical bypyramidal, seesaw, t-shape, and then linear. Whereas Ax2E2 follows the tetrahedral series, with FOUR regions of electrons density meaning Ax4: tetrahedral, Ax3E2: trig pry, Ax2E2...
Sun Oct 04, 2015 6:52 pm
Forum: Properties of Electrons
Replies: 5
Views: 4851