Search found 56 matches
- Sat Dec 07, 2019 5:57 pm
- Forum: Lewis Acids & Bases
- Topic: Lewis vs Bronsted
- Replies: 3
- Views: 238
Lewis vs Bronsted
Can a compound be a Lewis acid but not a Bronsted acid?
- Sat Dec 07, 2019 5:56 pm
- Forum: Coordinate Covalent Bonds
- Topic: Just to clear it up
- Replies: 16
- Views: 1069
Just to clear it up
So are the the atoms that create coordinate covalent bonds, Lewis bases?
- Sat Dec 07, 2019 5:54 pm
- Forum: Trends in The Periodic Table
- Topic: Exceptions to Electronegativity
- Replies: 6
- Views: 946
Exceptions to Electronegativity
Are there any exceptions to the electronegativity periodic trend?
- Sat Dec 07, 2019 5:53 pm
- Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
- Topic: Relative Strength
- Replies: 3
- Views: 346
Relative Strength
Which is stronger ion-dipole or hydrogen bonding?
- Sat Dec 07, 2019 5:53 pm
- Forum: Sigma & Pi Bonds
- Topic: Sigma Bonds
- Replies: 2
- Views: 257
Sigma Bonds
Which are stronger sigma or pi bonds?
- Sat Dec 07, 2019 5:52 pm
- Forum: Octet Exceptions
- Topic: Boron
- Replies: 8
- Views: 501
Boron
Why does boron not form an octet? Why does it prefer only 3 bonds?
- Sun Dec 01, 2019 3:39 pm
- Forum: Trends in The Periodic Table
- Topic: Nitrogen
- Replies: 7
- Views: 665
Nitrogen
Why does nitrogen disrupt the electron affinity trend?
- Sun Dec 01, 2019 3:39 pm
- Forum: Trends in The Periodic Table
- Topic: Exceptions to Electroaffinity
- Replies: 3
- Views: 389
Exceptions to Electroaffinity
Are there any exceptions to the electron affinity periodic trend?
- Sun Dec 01, 2019 3:34 pm
- Forum: Hybridization
- Topic: Hybridization of Hydrogen
- Replies: 3
- Views: 315
Hybridization of Hydrogen
What would be the hybridized state of hydrogen? Sometimes I see its hybridized as 1s and thats it Is that possible?
- Sun Dec 01, 2019 3:32 pm
- Forum: Industrial Examples
- Topic: What do we need to know?
- Replies: 15
- Views: 1645
Re: What do we need to know?
Drake Choi_1I wrote:What is one biological example of coordination compounds?
I think we need to know vitamin b12 and hemoglobin and myoglobin
- Sun Dec 01, 2019 3:32 pm
- Forum: Biological Examples
- Topic: Cisplatin
- Replies: 5
- Views: 341
Cisplatin
Hi can someone explain what we needs to know about cisplatin for the final?
- Sun Dec 01, 2019 3:29 pm
- Forum: Properties & Structures of Inorganic & Organic Acids
- Topic: Oxoacids and Carboxylic Acids
- Replies: 1
- Views: 238
Oxoacids and Carboxylic Acids
Which is a stronger acid? In general
- Sun Dec 01, 2019 3:26 pm
- Forum: Student Social/Study Group
- Topic: Final Topics
- Replies: 4
- Views: 285
Final Topics
Do we need to know molecular spectroscopy vs atomic spectroscopy? and if so what is molecular spectroscopy?
- Sun Dec 01, 2019 3:25 pm
- Forum: Student Social/Study Group
- Topic: Final topics
- Replies: 10
- Views: 575
Re: Final topics
The final is cumulative of everything we have learned this quarter.
- Sun Dec 01, 2019 3:23 pm
- Forum: Amphoteric Compounds
- Topic: Amphoteric Compound
- Replies: 2
- Views: 229
Amphoteric Compound
How do you know when an amphoteric compound is acting like an acid or base?
- Mon Nov 25, 2019 7:52 pm
- Forum: Amphoteric Compounds
- Topic: Oxides
- Replies: 4
- Views: 406
Oxides
How can you tell whether an oxide is acidic, basic or amphoteric without the chemical reaction formula such as in 6A,17?
- Fri Nov 22, 2019 4:40 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Bidentate
- Replies: 2
- Views: 170
Bidentate
How can you tell from the shape or chemical formula of a ligand if it will be a monodentate or bidentate or...?
- Tue Nov 19, 2019 6:55 pm
- Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
- Topic: Boiling Points
- Replies: 7
- Views: 369
Boiling Points
Explain the difference in the boiling points of NO2 (21 celsius) and N20 (-88 celsius)
- Tue Nov 19, 2019 4:02 pm
- Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
- Topic: Hydrocarbons
- Replies: 1
- Views: 192
Hydrocarbons
Are all hydrocarbons nonpolar?
- Tue Nov 19, 2019 4:01 pm
- Forum: *Liquid Structure (Viscosity, Surface Tension, Liquid Crystals, Ionic Liquids)
- Topic: Hydrogen Bonding/Pi bonds
- Replies: 11
- Views: 1652
Hydrogen Bonding/Pi bonds
Is there any similarity between hydrogen bonding (important in maintaining shapes of biological molecules) and pi bonds (prohibit rotation of the molecule)?
- Tue Nov 19, 2019 4:00 pm
- Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
- Topic: Nonpolar molecules
- Replies: 1
- Views: 158
Nonpolar molecules
Do nonpolar molecules only have London forces?
- Sun Nov 17, 2019 9:38 am
- Forum: Polarisability of Anions, The Polarizing Power of Cations
- Topic: Trend in polarisability and polarizing power?
- Replies: 3
- Views: 326
Trend in polarisability and polarizing power?
Are there any periodic trends for polarisability and polarizing power?
- Sun Nov 17, 2019 9:37 am
- Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
- Topic: Intermolecular Forces and Boiling/Melting Points
- Replies: 3
- Views: 233
Intermolecular Forces and Boiling/Melting Points
How do intermolecular forces affect melting and boiling points? Does a stronger force lead to a lower melting point?
- Sun Nov 17, 2019 9:35 am
- Forum: Bond Lengths & Energies
- Topic: Dissociation Energy
- Replies: 2
- Views: 237
Dissociation Energy
Can someone explain disassociation energy about bond lengths?
- Sun Nov 17, 2019 9:33 am
- Forum: Dipole Moments
- Topic: Dipole-Dipole Conti.
- Replies: 2
- Views: 174
Dipole-Dipole Conti.
Are there dipole-dipole forces on non polar molecules?
- Sun Nov 17, 2019 9:33 am
- Forum: Dipole Moments
- Topic: Dipole-Dipole
- Replies: 2
- Views: 217
Dipole-Dipole
Im still having a bit of trouble on how to identify dipole moments from a chemical formula? How do you know there are dipole-dipole forces?
- Sun Nov 10, 2019 4:21 pm
- Forum: Polarisability of Anions, The Polarizing Power of Cations
- Topic: High Distortion
- Replies: 4
- Views: 297
High Distortion
In lecture, I always here "high distortion" from highly polarized anions. What does it mean to have high distortion? Like does it have something to do with the electron cloud?
- Sun Nov 10, 2019 4:19 pm
- Forum: Dipole Moments
- Topic: Difference between two attractive forces
- Replies: 1
- Views: 70
Difference between two attractive forces
What is the difference between dipole-dipole and London forces? And how can you tell if a compound has a dipole-dipole force from the chemical formula?
- Sun Nov 10, 2019 4:18 pm
- Forum: Electronegativity
- Topic: Electronegativity Exceptions
- Replies: 3
- Views: 210
Electronegativity Exceptions
Are there any exceptions to the electronegativity trend on the periodic table? And why not(compared to ionization energy)?
- Sun Nov 10, 2019 4:15 pm
- Forum: Bond Lengths & Energies
- Topic: London Forces
- Replies: 6
- Views: 365
London Forces
Do all compounds have Van der Waals forces? And why is that?
- Sun Nov 10, 2019 4:13 pm
- Forum: Dipole Moments
- Topic: HYDROGEN BONDING
- Replies: 3
- Views: 149
HYDROGEN BONDING
Does a coumpound that has N,O, or F with a Hydrogen atom always have to have a hydrogen bond? Is there a way where the conditions for a hydrogen bond are present except the compound or molecule does not form a hydrogen bond?
- Tue Oct 29, 2019 7:21 pm
- Forum: Electronegativity
- Topic: Electronegativity
- Replies: 11
- Views: 635
Electronegativity
Okay I honestly do not remember what electronegativity is from high school, so what is it and if there is a trend on the periodic table for it?
- Tue Oct 29, 2019 7:19 pm
- Forum: Formal Charge and Oxidation Numbers
- Topic: Formal change equation
- Replies: 3
- Views: 178
Formal change equation
Will the equation for formal change be provided on the test or should it be committed to memorization?
- Tue Oct 29, 2019 7:18 pm
- Forum: Octet Exceptions
- Topic: List of Octet exceptions
- Replies: 6
- Views: 337
List of Octet exceptions
Is there a definitive number of elements that will disobey the octet rule?
- Tue Oct 29, 2019 7:16 pm
- Forum: Formal Charge and Oxidation Numbers
- Topic: FC Charge and Stability
- Replies: 2
- Views: 260
FC Charge and Stability
Will there every be a time when the formal charge is not 0 but it is the most stable structure for the atom?
- Tue Oct 29, 2019 7:15 pm
- Forum: Ionic & Covalent Bonds
- Topic: Strength of ionic and covalent bonds
- Replies: 2
- Views: 112
Strength of ionic and covalent bonds
Which bond is generally stronger? Covalent or ionic? Also is a single bond stronger than a double bond?
- Sat Oct 26, 2019 9:44 pm
- Forum: Trends in The Periodic Table
- Topic: Question on 2A.23 part a
- Replies: 2
- Views: 139
Question on 2A.23 part a
On the basis of the expected charges on the monoatomic ions, give the chemical formula for each of the following compounds
a) magnesium arsenide
How can you figure the amount of each element in the formula (aka the subscripts)?
a) magnesium arsenide
How can you figure the amount of each element in the formula (aka the subscripts)?
- Sat Oct 26, 2019 9:40 pm
- Forum: Trends in The Periodic Table
- Topic: Question on 2A. 17 part c
- Replies: 1
- Views: 78
Question on 2A. 17 part c
Predict the number of valence electrons present for each of the following ions
c) Co (3+)
How can you predict the number of valence electrons for a transition metal?
c) Co (3+)
How can you predict the number of valence electrons for a transition metal?
- Sat Oct 26, 2019 9:35 pm
- Forum: Trends in The Periodic Table
- Topic: Question on 1F.5 b
- Replies: 3
- Views: 171
Question on 1F.5 b
Which member of each pair is likely to have the smaller first ionization energy?
b) Mg or Na
The answer is Na but I do not necessarily understand why
b) Mg or Na
The answer is Na but I do not necessarily understand why
- Sat Oct 26, 2019 9:29 pm
- Forum: Trends in The Periodic Table
- Topic: Period 3 Elements
- Replies: 2
- Views: 72
Period 3 Elements
Why can some Period 3 elements not follow the octet rule? For example, P, S, Cl
- Sat Oct 26, 2019 9:28 pm
- Forum: Lewis Structures
- Topic: Covalent vs Ionic
- Replies: 2
- Views: 93
Covalent vs Ionic
Which is a stronger bond? Covalent or an ionic bond?
- Wed Oct 16, 2019 10:17 pm
- Forum: Heisenberg Indeterminacy (Uncertainty) Equation
- Topic: Uncertainty application
- Replies: 3
- Views: 168
Uncertainty application
Is it possible to calculate the uncertainty of a photon? Or does the fact that it lack mass prevent that?
- Wed Oct 16, 2019 10:10 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: the fourth number?
- Replies: 4
- Views: 223
Re: the fourth number?
I believe the 4th number is arbitrary as all you have to know is if there are 2 electrons in a box diagram then one is +1/2 and the other is -1/2. And if it is a single electron in the box it is still arbitrary.
- Wed Oct 16, 2019 10:08 pm
- Forum: DeBroglie Equation
- Topic: Question on applications of the equation
- Replies: 2
- Views: 190
Question on applications of the equation
Does the DeBroglie equation only work on electrons or can it also be applied to photons?
- Wed Oct 16, 2019 10:06 pm
- Forum: Photoelectric Effect
- Topic: When energy is equal to work function
- Replies: 9
- Views: 1022
When energy is equal to work function
So in the photoelectric effect, what would happen if the energy of the photon is equal to that of the work function (ie no KINETIC ENERGY)?
- Tue Oct 15, 2019 8:54 am
- Forum: Photoelectric Effect
- Topic: Question on Topic 1A.15
- Replies: 1
- Views: 105
Question on Topic 1A.15
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 THIS ELECTRON DURING THE EMISSION OF ENERGY THAT LEADS TO THIS SPECTRAL LINE. My question is there another way to solve the problem that does not inclu...
- Wed Oct 09, 2019 8:31 pm
- Forum: Photoelectric Effect
- Topic: Topic 1A.3
- Replies: 2
- Views: 174
Topic 1A.3
Which of the following happens when this frequency of electromagnetic radiation decreases? Explain your reasoning? a) The speed of the radiation decreases b) The wavelength of the radiation decreases c) The extent of the change in the electrical field at a given point decreases d) The energy of the ...
- Tue Oct 08, 2019 8:49 pm
- Forum: Properties of Light
- Topic: Intensity and the number of photons
- Replies: 3
- Views: 1358
Intensity and the number of photons
Can someone explain how intensity is proportional to the number of photons? And also if there is a formula that explains this process,
- Tue Oct 08, 2019 8:47 pm
- Forum: Properties of Light
- Topic: Rays of the EM Spectrum
- Replies: 2
- Views: 159
Rays of the EM Spectrum
Which rays in the EM spectrum can cause radiation or cancer? In other words, which ones are harmful to organisms and is dependent on their intensity?
- Tue Oct 08, 2019 8:44 pm
- Forum: Photoelectric Effect
- Topic: Kinetic Energy from the Photoelectric Effect
- Replies: 5
- Views: 171
Kinetic Energy from the Photoelectric Effect
So what happens to the excess energy (kinetic energy) caused by the the removal of the electron?
- Tue Oct 08, 2019 8:30 pm
- Forum: Balancing Chemical Reactions
- Topic: Chemical States
- Replies: 3
- Views: 190
Re: Chemical States
I think you should put the states because if not the equation would be skeletal.
- Tue Oct 01, 2019 8:50 pm
- Forum: Molarity, Solutions, Dilutions
- Topic: Question on E27
- Replies: 4
- Views: 123
Question on E27
A) Calculate the mass, in grams, of one water molecule
Okay so are you supposed to divide 1 water molecule by Avogadro's constant and then multiply by the molar mass to get the grams? If not please tell me what I am doing wrong
Okay so are you supposed to divide 1 water molecule by Avogadro's constant and then multiply by the molar mass to get the grams? If not please tell me what I am doing wrong
- Tue Oct 01, 2019 7:11 pm
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: Question on E17c
- Replies: 2
- Views: 119
Question on E17c
Which sample in each of the following pairs contains the greater number of moles of atoms?
c) 7.36 x 10^23 atoms of Ru or 7.36 x 10^27 atoms of Fe
So I used Avogadro's constant and I got the same answer for both? I got 1.222 x 10^4 mols of Ru and Fe. I was wondering where I went wrong.
c) 7.36 x 10^23 atoms of Ru or 7.36 x 10^27 atoms of Fe
So I used Avogadro's constant and I got the same answer for both? I got 1.222 x 10^4 mols of Ru and Fe. I was wondering where I went wrong.
- Tue Oct 01, 2019 3:17 pm
- Forum: Limiting Reactant Calculations
- Topic: Another question on E9 but now on part b
- Replies: 2
- Views: 80
Another question on E9 but now on part b
Epsom salts consist of magnesium sulfate heptahydrate. Write its formula. b)How many formula units of the compound are present in 5.15 grams I am confused on where to start with the problem? Do we find the moles of the compound first and then find the amount of atoms using Avogadro's constant? If no...
- Tue Oct 01, 2019 3:13 pm
- Forum: Limiting Reactant Calculations
- Topic: Practice Problem from Online Module
- Replies: 2
- Views: 115
Re: Practice Problem from Online Module
Okay from what I understand is first you want to understand the ratios of the products and reactants. So for example if you had CaC2 + 2H20--> Ca(OH)2 + C2H2, you can see the formula has a 1:2:1:1 ratio cause of the coefficients in front of them. So if we give the example of 100g of CaC2 divided by ...
- Tue Oct 01, 2019 2:53 pm
- Forum: Limiting Reactant Calculations
- Topic: Question on E9
- Replies: 4
- Views: 264
Question on E9
E.9 Epsom salts consist of magnesium sulfate heptahydrate. Write its formula a) How many atoms of oxygen are in 5.15 grams of Epson salts... Okay so for part A I understand using the 5.15 grams and dividing it by 246.48 of the molar mass of magnesium heptahydrate. What I am confused about is the nex...