Search found 74 matches
- Sun Dec 08, 2019 8:26 pm
- Forum: General Science Questions
- Topic: Grades
- Replies: 5
- Views: 651
Re: Grades
See your grade on my UCLA, add the pints and then divide by 500 points...
- Fri Dec 06, 2019 11:58 pm
- Forum: Administrative Questions and Class Announcements
- Topic: THE SONG DJ LL PLAYS AT THE BEGINNING OF CLASS [ENDORSED]
- Replies: 7
- Views: 1079
- Thu Dec 05, 2019 8:34 pm
- Forum: Sigma & Pi Bonds
- Topic: Delocalized bonnding
- Replies: 2
- Views: 267
Re: Delocalized bonnding
when electrons can change center
- Tue Dec 03, 2019 9:22 pm
- Forum: Polyprotic Acids & Bases
- Topic: How can you tell
- Replies: 18
- Views: 1026
Re: How can you tell
A strong acid with several hidrogens
Re: Formulas
The ligand names worksheet???
- Tue Dec 03, 2019 9:16 pm
- Forum: Conjugate Acids & Bases
- Topic: 6A.1
- Replies: 6
- Views: 799
Re: 6A.1
Conjugate acid of a base is going to be the given base with an H+
- Sat Nov 30, 2019 9:03 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Final Exam Content
- Replies: 14
- Views: 798
Re: Final Exam Content
CUMULATIVE
- Fri Nov 29, 2019 9:27 pm
- Forum: Lewis Acids & Bases
- Topic: HCl vs HF
- Replies: 19
- Views: 1395
Re: HCl vs HF
CL IS BOTH LARGER AND LESS ELETRONEGATIVE
- Fri Nov 29, 2019 9:26 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Test 2
- Replies: 6
- Views: 510
Re: Test 2
Probably in discussions
- Tue Nov 26, 2019 6:20 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Coordination Compound Drawings
- Replies: 2
- Views: 198
Re: Coordination Compound Drawings
General Lewis Structure I Believe
- Tue Nov 26, 2019 6:19 pm
- Forum: Student Social/Study Group
- Topic: Grades
- Replies: 18
- Views: 1187
Re: Grades
My UCLA
- Tue Nov 26, 2019 6:19 pm
- Forum: Biological Examples
- Topic: cisplatin
- Replies: 3
- Views: 300
Re: cisplatin
I would assume that we need to know the basic functions and how it relates to the topic of coordination compounds
- Thu Nov 21, 2019 11:52 am
- Forum: Hybridization
- Topic: Quiz 2 Hybridization Question
- Replies: 4
- Views: 329
Re: Quiz 2 Hybridization Question
NO... JUST UNTIL SIGMA AND PI BONDS
- Thu Nov 21, 2019 11:51 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: Forces
- Replies: 3
- Views: 256
Re: Forces
Induced Dipole-Induced Dipole = London Forces
- Thu Nov 21, 2019 11:48 am
- Forum: Dipole Moments
- Topic: Polar or nonpolar
- Replies: 8
- Views: 576
Re: Polar or nonpolar
O2 NONPOLAR
- Thu Nov 21, 2019 11:47 am
- Forum: Dipole Moments
- Topic: Dipole Induced- Dipole Induced
- Replies: 13
- Views: 1174
Re: Dipole Induced- Dipole Induced
It is the weakest... The same thing as referring to London Forces
- Thu Nov 21, 2019 11:46 am
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Bond Angle of O2
- Replies: 3
- Views: 550
Re: Bond Angle of O2
Because it is Linear but has a trigonal planar arrangement...
- Mon Nov 18, 2019 11:57 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Polar and Nonpolar Question [ENDORSED]
- Replies: 4
- Views: 1319
Re: Polar and Nonpolar Question [ENDORSED]
Awesome ... Thanks
- Sun Nov 17, 2019 2:44 am
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Bond Angles
- Replies: 5
- Views: 374
Re: Bond Angles
You need to know the tendencies of the shape the molecule has, that can and will help a lot ...
- Sun Nov 17, 2019 2:42 am
- Forum: General Science Questions
- Topic: Test 2 Review
- Replies: 8
- Views: 643
Re: Test 2 Review
Everything that was not included in the midterm.
- Sun Nov 17, 2019 2:41 am
- Forum: Determining Molecular Shape (VSEPR)
- Topic: VSEPR Formula
- Replies: 7
- Views: 437
Re: VSEPR Formula
Lone pairs count as regions within the structure. Be careful because these are not the same as bonding regions and a pair is considered 1 region.
- Sun Nov 17, 2019 2:39 am
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Van Der Waals Interaction
- Replies: 11
- Views: 636
Re: Van Der Waals Interaction
YES, ALL MOLECULE EXPERIENCE THESE FORCES...
- Thu Nov 14, 2019 10:59 am
- Forum: Administrative Questions and Class Announcements
- Topic: TEST 2
- Replies: 8
- Views: 459
Re: TEST 2
From intermolecular forces to VSEPR Model...
- Tue Nov 12, 2019 6:37 pm
- Forum: Dipole Moments
- Topic: Distinguishing Types
- Replies: 1
- Views: 113
Re: Distinguishing Types
Dipole-Dipole is a type of intermolecular force... The other types of intermolecular forces can be Dipole-Induced dipole, Ion-Ion, hydrogen bond...
- Tue Nov 12, 2019 6:34 pm
- Forum: Student Social/Study Group
- Topic: Final Exam
- Replies: 10
- Views: 679
Re: Final Exam
yes...
- Tue Nov 12, 2019 5:45 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Test 2
- Replies: 3
- Views: 112
Re: Test 2
I think anything we have given until now and anything we give this week...
- Sun Nov 10, 2019 11:10 pm
- Forum: Student Social/Study Group
- Topic: Midterm Average
- Replies: 12
- Views: 835
Re: Midterm Average
It says on the syllabus that he doesn't use curves... But it does say he take the class average before giving letter grades, so I am not sure???
- Sun Nov 10, 2019 7:55 pm
- Forum: Dipole Moments
- Topic: arrows for dipole moments
- Replies: 3
- Views: 221
Re: arrows for dipole moments
arrows point towards the element with the higher electronegativity...
- Sat Nov 09, 2019 2:14 pm
- Forum: Bond Lengths & Energies
- Topic: de Broglie threshold
- Replies: 4
- Views: 365
Re: de Broglie threshold
Less than 10^-15 m... That basically is referring to larger objects...
- Sat Nov 09, 2019 12:06 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: Test 2
- Replies: 6
- Views: 422
Re: Test 2
In the syllabus it says November 19 but it really depends on the day you take your discussion...
- Sat Nov 09, 2019 12:04 am
- Forum: Dipole Moments
- Topic: Polar
- Replies: 9
- Views: 586
Re: Polar
PERIODIC TABLE TRENDS. MORE ELECTRONEGATIVITY DIFFERENCE SIGNIFIES MORE POLAR MOLECULE...
- Wed Nov 06, 2019 11:08 pm
- Forum: Dipole Moments
- Topic: Dipole Moment Changing
- Replies: 3
- Views: 133
Re: Dipole Moment Changing
I believe it can vary if the molecule experiences resonance.
- Wed Nov 06, 2019 11:06 pm
- Forum: Student Social/Study Group
- Topic: Class Grading
- Replies: 44
- Views: 3736
Re: Class Grading
Correcto!
I'm not sure how that would exactly work though...
I'm not sure how that would exactly work though...
- Wed Nov 06, 2019 11:05 pm
- Forum: Bond Lengths & Energies
- Topic: Midterm
- Replies: 9
- Views: 535
Re: Midterm
Fingers Crossed for next week...
- Tue Nov 05, 2019 9:57 pm
- Forum: Polarisability of Anions, The Polarizing Power of Cations
- Topic: Sr 2+ or Rb 1+
- Replies: 6
- Views: 557
Re: Sr 2+ or Rb 1+
Rb has the larger Atomic Radius, Consequently Sr has a higher polarizing power.
Larger radius=more polarizability
smaller radius=more Polarizing Power...
Larger radius=more polarizability
smaller radius=more Polarizing Power...
- Mon Nov 04, 2019 10:43 pm
- Forum: Polarisability of Anions, The Polarizing Power of Cations
- Topic: Polarisability vs Polarizing Power
- Replies: 15
- Views: 1162
Re: Polarisability vs Polarizing Power
Polarisability is an atoms ability to be polarised, this can be determined by the atom's radius. A larger atomic radius means that the atoms electrons can be more easily distorted making them easier to polarize (Consecuently they are very Polarisable). Polarazing Power is an atoms ability to polariz...
- Mon Nov 04, 2019 10:38 pm
- Forum: Polarisability of Anions, The Polarizing Power of Cations
- Topic: Polar Covalent VS Ionic
- Replies: 11
- Views: 664
Re: Polar Covalent VS Ionic
Look at the electronegativity difference between the two elements.
- Sun Nov 03, 2019 1:10 am
- Forum: Ionic & Covalent Bonds
- Topic: 2A.1 Part C
- Replies: 3
- Views: 145
Re: 2A.1 Part C
valence electrons will follow the periodic table trends. Subtract the previous noble gas # of electrons.
- Thu Oct 31, 2019 8:18 pm
- Forum: Electronegativity
- Topic: What does electronegativity affect?
- Replies: 2
- Views: 142
Re: What does electronegativity affect?
It is the capacity of an element to attract Electrons
- Thu Oct 31, 2019 8:17 pm
- Forum: Trends in The Periodic Table
- Topic: Electronegativity Trend
- Replies: 2
- Views: 118
Re: Electronegativity Trend
increasing to the right side of the table
decreasing down the table
decreasing down the table
- Tue Oct 29, 2019 12:14 pm
- Forum: Ionic & Covalent Bonds
- Topic: Study For midterm
- Replies: 7
- Views: 365
Re: Study For midterm
PRACTICE, PRACTICE, PRACTICE...
And go to the review sections...
And go to the review sections...
- Tue Oct 29, 2019 12:12 pm
- Forum: Bond Lengths & Energies
- Topic: bond lengths
- Replies: 10
- Views: 578
Re: bond lengths
The more Bonds means a stronger pull so consequently you also get a smaller length because of the increased attraction.
- Tue Oct 29, 2019 12:10 pm
- Forum: Ionic & Covalent Bonds
- Topic: Midterm
- Replies: 10
- Views: 533
Re: Midterm
Everything is on the syllabus and in the test schedule.
- Tue Oct 29, 2019 12:08 pm
- Forum: Ionic & Covalent Bonds
- Topic: Polar vs Nonpolar bond strength
- Replies: 2
- Views: 713
Re: Polar vs Nonpolar bond strength
Yes, they are very different.
- Sat Oct 26, 2019 8:56 pm
- Forum: Ionic & Covalent Bonds
- Topic: Ionic and Covalent Bonds
- Replies: 4
- Views: 181
Re: Ionic and Covalent Bonds
It will depend on the elements you are working with and its specific qualities. You will have to pay close attention to the position they have on the periodic table and wether or not it is easier for them to share, lose or gain electrons.
- Fri Oct 25, 2019 8:30 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Electron Configurations
- Replies: 5
- Views: 225
Re: Electron Configurations
4s is written after 3d if this level appears in the configuration. It was experimentally proven that 4s has a lower energy level then 3d
- Fri Oct 25, 2019 1:12 am
- Forum: Ionic & Covalent Bonds
- Topic: Threshold Energy
- Replies: 4
- Views: 286
Re: Threshold Energy
It can be calculated. It it the minimum requirement of energy in order to achieve the ejection of an electron.
- Fri Oct 25, 2019 1:09 am
- Forum: Student Social/Study Group
- Topic: Midterm
- Replies: 17
- Views: 901
Re: Midterm
My TA said it was unlikely but Lavelle is the one making the test so I would ask just to be on the safe side.
- Fri Oct 25, 2019 1:07 am
- Forum: Trends in The Periodic Table
- Topic: Relationship between Electronegativity and Ionization Energy?
- Replies: 6
- Views: 935
Re: Relationship between Electronegativity and Ionization Energy?
They do have similar tendencies...
- Mon Oct 21, 2019 8:17 pm
- Forum: Photoelectric Effect
- Topic: Intensity of Light
- Replies: 4
- Views: 155
Re: Intensity of Light
Increasing the intensity increases the overall number of photons. In order to eject a single electron you need enough energy within a single photon.
- Sat Oct 19, 2019 2:42 pm
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: Balmer vs. Lyman Series
- Replies: 4
- Views: 260
Re: Balmer vs. Lyman Series
Balmer was in the visible region while Lyman was in the UV region of the spectrum. Each has a different quantum number because the energy levels are different...
- Sat Oct 19, 2019 2:39 pm
- Forum: Photoelectric Effect
- Topic: One photon one atom interaction
- Replies: 14
- Views: 595
Re: One photon one atom interaction
If the individual photon has already passed the energy threshold then theoretically the number of photons overall should equal the amount of ejected electrons.
- Sat Oct 19, 2019 2:33 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Inner e- and Outer e-
- Replies: 14
- Views: 503
Re: Inner e- and Outer e-
The inner e- are going to act as a type of shield for the outer e-. Like the Teacher said in class: It is like when a person stand in-between you and a fire. You will not feel the same amount of heat as if you were directly in front of the fire source yourself. The outer electrons have attraction to...
- Wed Oct 16, 2019 1:52 pm
- Forum: General Science Questions
- Topic: Salt Water: Mixture or Compound?
- Replies: 4
- Views: 666
Re: Salt Water: Mixture or Compound?
Mixture... They don't change each others main chemical components when they mix and they can be separated physically
- Wed Oct 16, 2019 1:51 pm
- Forum: Properties of Electrons
- Topic: Orbitals and Lobes
- Replies: 3
- Views: 136
Re: Orbitals and Lobes
I believe orbitals is the overall mathematical function while lobe refers to a more specific part within the orbital.
- Wed Oct 16, 2019 1:48 pm
- Forum: Properties of Light
- Topic: Constant for Speed of Light
- Replies: 14
- Views: 613
Re: Constant for Speed of Light
I think 2.998x10^8 is more accurate but definitely ask if your not positive.
- Sun Oct 13, 2019 12:00 am
- Forum: Properties of Light
- Topic: Frequency vs. Wavelength
- Replies: 15
- Views: 711
Re: Frequency vs. Wavelength
They have an inverse relationship. The more frequency of waves you have, the less length to each wave you will get
- Sat Oct 12, 2019 11:57 pm
- Forum: Properties of Light
- Topic: wavelike properties
- Replies: 6
- Views: 200
Re: wavelike properties
It is less about needing and more about it just having wave-like Properties.
- Sat Oct 12, 2019 12:25 pm
- Forum: Significant Figures
- Topic: Balancing Equations
- Replies: 4
- Views: 398
Re: Balancing Equations
Take in element by element and make sure you have the same number on both sides.
Mainly trust yourself and keep calm... That is essential.
Mainly trust yourself and keep calm... That is essential.
- Fri Oct 11, 2019 2:23 pm
- Forum: Student Social/Study Group
- Topic: Best Sessions
- Replies: 12
- Views: 480
Re: Best Sessions
I personally find it best to do all the homework exercises because that way you get a taste of everything.
- Fri Oct 11, 2019 12:06 am
- Forum: Limiting Reactant Calculations
- Topic: Can't Find Limiting Reactant
- Replies: 4
- Views: 355
Re: Can't Find Limiting Reactant
Make sure to balance first
It is a common mistake people make and a lot of teachers put it in like that in test in order to trick you.
It is a common mistake people make and a lot of teachers put it in like that in test in order to trick you.
- Fri Oct 11, 2019 12:03 am
- Forum: Significant Figures
- Topic: Question About Significant Figures and Rounding
- Replies: 22
- Views: 3250
Re: Question About Significant Figures and Rounding
Only round for the final result. If not your final number will be slightly different.
For multiplication and division you go with the number with the least Sig. figures
For adding or subtracting use the number with the least amount of decimal points...
For multiplication and division you go with the number with the least Sig. figures
For adding or subtracting use the number with the least amount of decimal points...
- Fri Oct 11, 2019 12:00 am
- Forum: Molarity, Solutions, Dilutions
- Topic: Homework L7
- Replies: 4
- Views: 1134
Re: Homework L7
Turn the mass I’m that is given into moles by dividing by the molar mass of the molecule it is asking.
Use a molar ratio to go from the first molecule to the desired one
Multiply that molecule by its molar mass in order to cancel out the moles and get just the mass!!!
Use a molar ratio to go from the first molecule to the desired one
Multiply that molecule by its molar mass in order to cancel out the moles and get just the mass!!!
- Tue Oct 08, 2019 9:18 pm
- Forum: Properties of Light
- Topic: Intensity and the number of photons
- Replies: 3
- Views: 1339
Re: Intensity and the number of photons
Increasing light intensity will increase the number of photons, but that will not increase the amount of energy per individual photons. That means that changing the intensity does little in relation to the photoelectric effect.
- Sun Oct 06, 2019 6:37 pm
- Forum: Balancing Chemical Reactions
- Topic: Balancing Reactions
- Replies: 25
- Views: 2162
Re: Balancing Reactions
Law of Conservation of Mass
MASS IS NOT CREATED NOR DESTROYED, IT IS TRANSFORMED. Consecuently, you need to maintain the same amount of mass at the end the reaction.
MASS IS NOT CREATED NOR DESTROYED, IT IS TRANSFORMED. Consecuently, you need to maintain the same amount of mass at the end the reaction.
- Sun Oct 06, 2019 6:34 pm
- Forum: Student Social/Study Group
- Topic: Turning in Extra HW problems
- Replies: 10
- Views: 442
Re: Turning in Extra HW problems
I would ask your TA directly... Either way you don't lose anything with being extra prepared!!!
- Sat Oct 05, 2019 2:48 pm
- Forum: Molarity, Solutions, Dilutions
- Topic: Converting Before or After?
- Replies: 10
- Views: 607
Re: Converting Before or After?
IF EVERYTHING IS GOING WELL THE DESIRED UNITS SHOULD PERFECTLY CANCEL OUT... IF NOT YOU HAVE A BIT OF A PROBLEM...
- Thu Oct 03, 2019 9:46 pm
- Forum: Significant Figures
- Topic: Sig Figs on the Test
- Replies: 3
- Views: 182
Re: Sig Figs on the Test
For values of elements you cannot simplify. No significant figures, just use the number on the periodic table.
- Thu Oct 03, 2019 9:45 pm
- Forum: Limiting Reactant Calculations
- Topic: Basic Question
- Replies: 11
- Views: 570
Re: Basic Question
EXTREMELY unlikely ...
- Sun Sep 29, 2019 9:26 pm
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: E.15, what is a sulfide of a metal?
- Replies: 3
- Views: 160
Re: E.15, what is a sulfide of a metal?
74.10gxmol-1 - 34.02gxmol-1
40.08gxmol-1 (Ca) + 32.06 gxmol-1 (S)
= 72.14gxmol-1
40.08gxmol-1 (Ca) + 32.06 gxmol-1 (S)
= 72.14gxmol-1
- Sun Sep 29, 2019 8:35 pm
- Forum: Significant Figures
- Topic: Rounding the elements
- Replies: 12
- Views: 863
Re: Rounding the elements
When it comes to numbers directly from the periodic table y would recommend not rounding. Use the exact number.
- Sun Sep 29, 2019 8:33 pm
- Forum: Significant Figures
- Topic: Question About Significant Figures and Rounding
- Replies: 22
- Views: 3250
Re: Question About Significant Figures and Rounding
It depends on how you obtained that number. If you used division or multiplication, then the number of significant figures will be determined by the original number with the least amount of significant figures. For Example: 2.5 x 3.42 , 2.5 has the smallest amount of sig. figures with only 2 (you wi...
- Sun Sep 29, 2019 2:30 pm
- Forum: Significant Figures
- Topic: Basic sig fig question
- Replies: 6
- Views: 525
Re: Basic sig fig question
Try to always leave it for the final result.
- Sun Sep 29, 2019 2:25 pm
- Forum: Significant Figures
- Topic: Significant figures clarification
- Replies: 3
- Views: 264
Re: Significant figures clarification
It depends on how you obtained that number. If you used division or multiplication, then the number of significant figures will be determined by the original number with the least amount of significant figures. For Example: 2.5 x 3.42 , 2.5 has the smallest amount of sig. figures with only 2 (you wi...