Search found 32 matches

by Karla_Ocampo 4E
Fri Dec 07, 2018 5:07 pm
Forum: Administrative Questions and Class Announcements
Topic: FINAL PRACTICE - Lyndon's Churro Review Session [ENDORSED]
Replies: 118
Views: 4464

Re: FINAL PRACTICE - Lyndon's Churro Review Session [ENDORSED]

Hey guys! Im at another review for another final *crying emoji* , can someone PLEASE send me pictures of their notes?? I would greatly appreciate it!! my email is itzkar1@g.ucla.edu
by Karla_Ocampo 4E
Fri Dec 07, 2018 4:38 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: Strong Acids
Replies: 5
Views: 71

Re: Strong Acids

Hi, I think we should know the difference between both the acids, the calculations will probably just be strong acids however we should be prepared to calculate weak acids just in case.
by Karla_Ocampo 4E
Fri Dec 07, 2018 4:32 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Total Charge
Replies: 5
Views: 86

Re: Total Charge

In order to find this total charge, you would have to sum the charges of the transition metal and the ligands.
by Karla_Ocampo 4E
Fri Nov 30, 2018 7:32 pm
Forum: Naming
Topic: Coordination Number
Replies: 3
Views: 50

Re: Coordination Number

Hi! To find the coordination number, you count the number of atoms around the central atom.
by Karla_Ocampo 4E
Fri Nov 30, 2018 7:28 pm
Forum: Naming
Topic: Naming Coordination Compounds
Replies: 9
Views: 127

Re: Naming Coordination Compounds

Hi! I dont think we need to memorize all of them but we do need to be familiar with the common ligands.
by Karla_Ocampo 4E
Fri Nov 30, 2018 6:46 pm
Forum: Naming
Topic: Coordination number
Replies: 10
Views: 295

Re: Coordination number

Hi! The coordination number is just the number of atoms attached to the central atom. However as someone stated, don't count lone pairs.
by Karla_Ocampo 4E
Sun Nov 25, 2018 10:14 am
Forum: Lewis Structures
Topic: Polar vs Nonpolar molecules
Replies: 7
Views: 107

Re: Polar vs Nonpolar molecules

First step in determining if something is polar or nonpolar is drawing the lewis structure. Then you check for electronegativity , as stated below, if it doesn't cancel out then it is polar. It would help to also draw the 3D model to get a more closer look.
by Karla_Ocampo 4E
Wed Nov 21, 2018 3:33 pm
Forum: Bond Lengths & Energies
Topic: Dissociation Energy
Replies: 4
Views: 93

Re: Dissociation Energy

Are we required to know the bond dissociation energies of diatomic molecules? The table 3.3 on page 93 of the 6th edition gives a list but I dont know if we're required to memorize these.
by Karla_Ocampo 4E
Sun Nov 18, 2018 11:12 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Determining Shape
Replies: 10
Views: 150

Re: Determining Shape

I think its best to always draw the lewis structure so you can get the most accurate answer. This way you will be able to find the shape, lone pairs, etc..
by Karla_Ocampo 4E
Sun Nov 18, 2018 11:05 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Bond Angles
Replies: 16
Views: 152

Re: Bond Angles

I think its best to just memorize them to be safe.
by Karla_Ocampo 4E
Sun Nov 18, 2018 11:00 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Test 3
Replies: 19
Views: 249

Re: Test 3

Hi! I think it would be best if you do memorize them since theyre not on the formula sheet for the test.
by Karla_Ocampo 4E
Fri Nov 09, 2018 5:47 pm
Forum: Ionic & Covalent Bonds
Topic: Ionization Energies
Replies: 13
Views: 169

Re: Ionization Energies

Hi! Yes since ionization energies decrease from top to bottom within a group. For example, also Fluorine also has a high ionization energy. Also, Cesium is said to have the lowest ionization energy.
by Karla_Ocampo 4E
Fri Nov 09, 2018 5:13 pm
Forum: Lewis Structures
Topic: Formal charge question
Replies: 9
Views: 134

Re: Formal charge question

Hi! Yes I think that by determining the formal charge we are able to know and keep track of the electrons and thus it is important for predicting the reactivity. I think it is the best way to know if you have the most stable lewis structure.
by Karla_Ocampo 4E
Fri Nov 09, 2018 4:58 pm
Forum: Ionic & Covalent Bonds
Topic: Ionic vs Covalent Bonds
Replies: 18
Views: 257

Re: Ionic vs Covalent Bonds

Hi! So there are two types of atomic bonds, ionic and covalent. A covalent bond is two non metals bonding together. An example of a covalent bond is water (H2O). An ionic bond is when a cation (metal) bonds with a anion (nonmetal). An example of an ionic bond is NaCl. I hope this helped!
by Karla_Ocampo 4E
Fri Nov 02, 2018 5:00 pm
Forum: Administrative Questions and Class Announcements
Topic: MIDTERM PRACTICE - Garlic Bread Review Session [ENDORSED]
Replies: 121
Views: 4598

Re: MIDTERM PRACTICE - Garlic Bread Review Session [ENDORSED]

For number 6 part A, we need to use the DeBroglie wavelength equation right? I used it and got 1.5547 x 10^/34 m but im not sure if I used the right equation? and I also think I messed up the units so pls correct me if needed
by Karla_Ocampo 4E
Fri Nov 02, 2018 2:30 pm
Forum: Administrative Questions and Class Announcements
Topic: MIDTERM PRACTICE - Garlic Bread Review Session [ENDORSED]
Replies: 121
Views: 4598

Re: MIDTERM PRACTICE - Garlic Bread Review Session [ENDORSED]

can anyone please help me with number 2? I got to dividing the molar mass of 667 by 30.024 and got 22? but i think its wrong because its such a large number. Thus my molecular formula so far is C22H44O22 ?? pls help
by Karla_Ocampo 4E
Sun Oct 28, 2018 10:10 am
Forum: Lewis Structures
Topic: Drawing Lewis Structures with Charges
Replies: 6
Views: 114

Re: Drawing Lewis Structures with Charges

Hi! So for drawing Lewis structures, you remove one electron for each + 1 charge, and add one electron for each -1 charge.
by Karla_Ocampo 4E
Sun Oct 28, 2018 10:08 am
Forum: Octet Exceptions
Topic: do we nee to memorize the octet exceptions?
Replies: 6
Views: 269

Re: do we nee to memorize the octet exceptions?

I think there are only some we need to know, I think he listed them in class. I believe they were: H, He, Li, and Be.
by Karla_Ocampo 4E
Sun Oct 28, 2018 10:03 am
Forum: Ionic & Covalent Bonds
Topic: Lowest Ionization Energy [ENDORSED]
Replies: 7
Views: 129

Re: Lowest Ionization Energy [ENDORSED]

Hi! You can know this by using your periodic table, but be careful because hydrogen is a bit tricky.
by Karla_Ocampo 4E
Sat Oct 20, 2018 12:41 pm
Forum: Properties of Light
Topic: Do I have to memorize the spectrum?
Replies: 20
Views: 268

Re: Do I have to memorize the spectrum?

I don't think so, maybe just the visible light range and the general order of the spectrum.
by Karla_Ocampo 4E
Sat Oct 20, 2018 12:39 pm
Forum: Properties of Light
Topic: color of light
Replies: 11
Views: 172

Re: color of light

Hi! According to the book, the color of light depends on its frequency and wavelength; long wavelength radiation has a lower frequency than short wavelength radiation (p6, edition6).
by Karla_Ocampo 4E
Sat Oct 20, 2018 12:26 pm
Forum: Properties of Light
Topic: Calculating the wavelength of light
Replies: 7
Views: 93

Calculating the wavelength of light

Hi everyone! Im studying chapter 1 (edition 6) and I came across example 1.1 which is calculating the wavelength of light of a known frequency.My question is: which numbers do i plug into the formula for C (the speed of light)? I know its 3 x 10^8 m/s but the example used 2.998 x 10^8 m/s. Is the mo...
by Karla_Ocampo 4E
Wed Oct 10, 2018 7:12 pm
Forum: Significant Figures
Topic: Test 1
Replies: 3
Views: 169

Re: Test 1

Hi! No, I think they will be given, and also certain formulas and the periodic table.
by Karla_Ocampo 4E
Wed Oct 10, 2018 7:04 pm
Forum: Properties of Light
Topic: Light acts as a wave or not?
Replies: 10
Views: 108

Re: Light acts as a wave or not?

Hi! According to my notes, light does act as both a wave and a particle. Hope this helps!
by Karla_Ocampo 4E
Tue Oct 09, 2018 7:50 pm
Forum: Administrative Questions and Class Announcements
Topic: Number of questions on test one [ENDORSED]
Replies: 39
Views: 17235

Re: Number of questions on test one [ENDORSED]

No, I dont think we need to buy anything from the student store
by Karla_Ocampo 4E
Wed Oct 03, 2018 3:10 pm
Forum: Balancing Chemical Reactions
Topic: Combustion Reactions.
Replies: 8
Views: 174

Re: Combustion Reactions.

Hi Gabby!
Dont even apologize! My high school chemistry class didn't teach me anything either so same. So to answer your question, combustion problems will always need O2 as a reactant and H2O and CO2 as the products. Then you just continue to balance the equation and so on. I hope this helped!
by Karla_Ocampo 4E
Wed Oct 03, 2018 2:59 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7337
Views: 804776

Re: Post All Chemistry Jokes Here

What do you do with a dead chemist?
"Barium" (Ba)
by Karla_Ocampo 4E
Wed Oct 03, 2018 2:57 pm
Forum: SI Units, Unit Conversions
Topic: Grams/mole
Replies: 12
Views: 255

Re: Grams/mole

Hi! Thank you for posting this as I was too confused on which to use. However now I know that they have the same meaning but they are just written differently. So, in g.mol ^-1 , the -1 is supposed to be the denominator, which turns out to be the same as g/mol. Really it just comes down to your pref...

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