Search found 20 matches
- Sat Mar 12, 2016 2:54 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: heat capacity
- Replies: 2
- Views: 636
heat capacity
why does ethane have a higher heat capacity than ethene?
- Sun Mar 06, 2016 9:56 pm
- Forum: *Calculations Using ΔG° = -RT ln K
- Topic: lnk=G/-RT
- Replies: 1
- Views: 2256
lnk=G/-RT
How does the change of temperature (increase or decrease) affect the K?
What does the value of Keq (high or low) tell you about the molecules' conformations?
What does the value of Keq (high or low) tell you about the molecules' conformations?
- Sun Feb 28, 2016 3:34 pm
- Forum: *Cycloalkanes
- Topic: Naming the compound
- Replies: 1
- Views: 398
Naming the compound
The compound's name is 3Bromo-1Iodocyclohexane.
Why is it not 1Bromo-3Iodocyclohexane? Since the numbers are the same shouldn't the lower number be assigned to the Bromo?
Why is it not 1Bromo-3Iodocyclohexane? Since the numbers are the same shouldn't the lower number be assigned to the Bromo?
- Sun Feb 21, 2016 10:05 pm
- Forum: *Electrophilic Addition
- Topic: Ethene
- Replies: 1
- Views: 610
Ethene
Why is ethene attractive to an electrophile?
- Sun Feb 14, 2016 2:44 pm
- Forum: First Order Reactions
- Topic: solving for [A]t
- Replies: 1
- Views: 552
solving for [A]t
Given the first order reaction and the initial value of A, [A]0, and the concentration of a product how do we find [A]t?
i.e. reaction: 2A -> B + C
given that [A]0 = 0.153 mol/L and that after 115 sec the concentration of B rises to 0.034 mol/L. Find [A]t.
i.e. reaction: 2A -> B + C
given that [A]0 = 0.153 mol/L and that after 115 sec the concentration of B rises to 0.034 mol/L. Find [A]t.
- Mon Feb 01, 2016 10:55 pm
- Forum: Balancing Redox Reactions
- Topic: oxidizing agents
- Replies: 1
- Views: 595
oxidizing agents
Arrange the following species in order of increasing strength as oxidizing agents for species in aqueous solutions:
Co^2+, Cl2, Ce^4+, In^3+
Co^2+, Cl2, Ce^4+, In^3+
- Mon Feb 01, 2016 10:54 pm
- Forum: Balancing Redox Reactions
- Topic: Reducing and oxidizing agents
- Replies: 1
- Views: 613
Reducing and oxidizing agents
What determines the strength of reducing agents and oxidizing agents?
- Sun Jan 24, 2016 12:08 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Bond Enthalpies
- Replies: 1
- Views: 416
Bond Enthalpies
When balancing an equation to calculate the bond enthalpies, do all coefficients have to be whole numbers or should they be left as fractions?
ie. C4H10 + O2 -> CO2 + H2O
ie. C4H10 + O2 -> CO2 + H2O
- Tue Jan 19, 2016 1:03 pm
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: Adiabatic process
- Replies: 1
- Views: 425
Adiabatic process
In an adiabatic process, where no energy is transferred as heat, in a closed system:
how can the change of U (internal energy) = q?
Would change of U = 0 since q is respectively = 0?
how can the change of U (internal energy) = q?
Would change of U = 0 since q is respectively = 0?
- Sun Jan 10, 2016 10:37 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Heat Capacity
- Replies: 1
- Views: 435
Heat Capacity
Why is the change in temperature for heat capacity of 1C equivalent to the change in temperature of 1 K?
- Fri Dec 04, 2015 11:05 pm
- Forum: *Making Buffers & Calculating Buffer pH (Henderson-Hasselbalch Equation)
- Topic: concentration of buffer
- Replies: 2
- Views: 688
concentration of buffer
Buffer solution containing equal amounts of acetic acid and sodium acetate is prepared. What concentration of the buffer must be prepared to prevent change in the pH by more than .20 pH units after the addition of 1.00ml of 6.00 M HCL to 100 ml of the buffer solution?
- Fri Dec 04, 2015 10:55 pm
- Forum: Ionic & Covalent Bonds
- Topic: covalent character
- Replies: 5
- Views: 5394
covalent character
What determines which compound has bonds that have the most or the least covalent character?
i.e. which of the compounds below has bonds with the least covalent character?
AgI AgCl AgF AlCl3 BeCl2
i.e. which of the compounds below has bonds with the least covalent character?
AgI AgCl AgF AlCl3 BeCl2
- Sun Nov 22, 2015 2:42 pm
- Forum: Acidity & Basicity Constants and The Conjugate Seesaw
- Topic: oxides acidic, basic, or amphoteric
- Replies: 1
- Views: 3532
oxides acidic, basic, or amphoteric
What determines whether an oxide is acidic, basic, or amphoteric?
I.e. 1) BaO 2) SO3 3) As2O3 4) Bi2O3
I.e. 1) BaO 2) SO3 3) As2O3 4) Bi2O3
- Sun Nov 15, 2015 5:59 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Favorable physical conditions
- Replies: 1
- Views: 608
Favorable physical conditions
How do you determine which physical conditions will favor the production of the reactants or products given only the equation of the reaction?
I.e. Given the reaction Br2(g) in equilibrium with 2Br(g)
what physical conditions favor the production of bromine atoms?
I.e. Given the reaction Br2(g) in equilibrium with 2Br(g)
what physical conditions favor the production of bromine atoms?
- Sat Nov 07, 2015 5:24 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Chelating Complexes
- Replies: 5
- Views: 1126
Chelating Complexes
What is the exact definition of a chelating complex?
And how do you determine whether or not an isomer can form a chelating complex?
And how do you determine whether or not an isomer can form a chelating complex?
- Fri Oct 30, 2015 11:10 pm
- Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
- Topic: Ionization Energy
- Replies: 1
- Views: 1451
Ionization Energy
How does determining valence shell electron configurations and bond order indicate levels of ionization energy (lowest or highest)?
i.e. comparing C2+, C2, C2-
i.e. comparing C2+, C2, C2-
- Thu Oct 22, 2015 12:56 pm
- Forum: Hybridization
- Topic: Bond Angle
- Replies: 1
- Views: 544
Bond Angle
How does the change in hybridization correlate to bond angle?
ie. Is the bond angle between two hybrid orbitals expected to increase or decrease as the s-character of the hybrids is increased?
ie. Is the bond angle between two hybrid orbitals expected to increase or decrease as the s-character of the hybrids is increased?
- Sat Oct 17, 2015 12:33 pm
- Forum: Lewis Structures
- Topic: Determining between double bonds or single bonds
- Replies: 1
- Views: 517
Determining between double bonds or single bonds
Ex. Write the Lewis Structure for ONF. With N being the central atom and a total of 18 electrons, there is a double bond between the atom O and N, but only a single bond between N and F.
What determines that there will be a double bond between O and N and not with N and F?
What determines that there will be a double bond between O and N and not with N and F?
- Sat Oct 10, 2015 10:24 am
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Ionic radius
- Replies: 1
- Views: 627
Ionic radius
Why do ions that have the same number of electrons still differ in ionic radius?
For instance, S2-, Cl-, and P3- are isoelectronic and are thus all resemble Argon, so shouldn't their ionic radiuses be equal?
For instance, S2-, Cl-, and P3- are isoelectronic and are thus all resemble Argon, so shouldn't their ionic radiuses be equal?
- Wed Sep 30, 2015 6:06 pm
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: Determining values of n given the wavelength
- Replies: 2
- Views: 13813
Determining values of n given the wavelength
Q. In the ultraviolet spectrum of atomic hydrogen, a line is observed at 102.6 nm. Determine the values of n for the initial and final energy levels of the electron during the emission of energy that leads to this spectral line.