Search found 33 matches
- Fri Dec 07, 2018 6:16 pm
- Forum: Lewis Acids & Bases
- Topic: Ligands
- Replies: 7
- Views: 921
Re: Ligands
A neutral ligand like H2O would not provide a charge in the complex it is in.
- Fri Dec 07, 2018 6:15 pm
- Forum: Calculating the pH of Salt Solutions
- Topic: pH sig figs
- Replies: 4
- Views: 703
Re: pH sig figs
pH sig figs are different. You have to count after the decimal places and see how many to include based on the given problem
- Fri Dec 07, 2018 6:13 pm
- Forum: Conjugate Acids & Bases
- Topic: Water as an Acid/Base
- Replies: 20
- Views: 1568
Re: Water as an Acid/Base
Water can be both depending on if its the accepter or donater of a H+ ion
- Fri Dec 07, 2018 6:11 pm
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: Strong Acids
- Replies: 5
- Views: 622
Re: Strong Acids
Most equations deal with strong acids so its safer to assume it is strong. However, we need to know the differences between strong and weak acids
- Sat Dec 01, 2018 1:51 pm
- Forum: Ionic & Covalent Bonds
- Topic: Intra vs Intermolecular forces
- Replies: 9
- Views: 16727
Re: Intra vs Intermolecular forces
Intramolecular forces are much stronger as they are heavily involved with sharing or giving/gaining electrons instead of just having interactions between molecules such as intermolecular forces such as DD forces
- Sat Dec 01, 2018 1:48 pm
- Forum: Sigma & Pi Bonds
- Topic: Number of Sigma and Pi Bonds
- Replies: 6
- Views: 1003
Re: Number of Sigma and Pi Bonds
It's due to the number of orbitals. S orbitals have one orbital while P orbitals have three
- Sat Dec 01, 2018 1:40 pm
- Forum: Student Social/Study Group
- Topic: Final
- Replies: 12
- Views: 1720
Re: Final
Yeah. Its on every topic weighted equally according to the email sent out
- Sun Nov 25, 2018 9:14 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Polarity
- Replies: 6
- Views: 573
Re: Polarity
It is more important to look at the VSEPR shape of the molecule to see if its polar in conjunction with the lone pair to see if its polar or not.
- Sun Nov 25, 2018 9:10 pm
- Forum: Hybridization
- Topic: Octet Expansion
- Replies: 6
- Views: 498
Re: Octet Expansion
Once the 8 valence electrons from the s and p orbitals are filled up, they have to go to d orbitals where it could hold 10 more pairs of electrons. Then it would go to f and so on
- Sun Nov 25, 2018 9:07 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Sigma Bond vs. Pi Bond
- Replies: 3
- Views: 357
Re: Sigma Bond vs. Pi Bond
Pi Bonds have electron overlaps on top and bottom of the internuclear axis while sigma bond shave electron overlaps around the axis
- Sun Nov 18, 2018 6:58 pm
- Forum: Hybridization
- Topic: Bond Angles
- Replies: 12
- Views: 1156
Re: Bond Angles
Drawing out the shape of the molecule helps to see where each bond is located and therefore where each bond angle would be. It would be a lot harder to determine bond angles without actually drawing out the shape through VSEPR
- Sun Nov 18, 2018 6:55 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Lone Pair?
- Replies: 4
- Views: 563
Lone Pair?
When there is a lone pair, the bond angle is considered to be less. But is there a way to find out how much the bond angle is affected by each lone pair?
- Sun Nov 18, 2018 6:52 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: No central atom
- Replies: 7
- Views: 619
Re: No central atom
Since there are only two N atoms, we would use each of those as the central atoms. It would result in a trigonal pyramidal shape with a 109.5 bond angle
- Thu Nov 08, 2018 9:20 pm
- Forum: Lewis Structures
- Topic: Placement of Elements?
- Replies: 5
- Views: 606
Placement of Elements?
Does it matter if an element is placed on the top or bottom when there 3 connected bonds such as CH3-?
- Thu Nov 08, 2018 9:18 pm
- Forum: Ionic & Covalent Bonds
- Topic: Strength of Bonds?
- Replies: 5
- Views: 680
Strength of Bonds?
Why are ionic bonds stronger than covalent bonds? And why does polarity matter in terms of strength for covalent bonds?
- Thu Nov 08, 2018 9:15 pm
- Forum: Ionic & Covalent Bonds
- Topic: Ionic vs Covalent Bonds
- Replies: 18
- Views: 1806
Re: Ionic vs Covalent Bonds
Ionic Bonds usually consist of a non-metal and metal that transfer electrons while a covalent bond is between non-metals that share electrons
- Sat Nov 03, 2018 4:13 pm
- Forum: Ionic & Covalent Bonds
- Topic: Covalent Bonds
- Replies: 16
- Views: 1632
Re: Covalent Bonds
non-metals usually are the composition of covalent bonds and therefore share electrons to fill their outer shell and are anions from gaining and sharing electrons
- Sat Nov 03, 2018 4:07 pm
- Forum: SI Units, Unit Conversions
- Topic: Molar Mass to Kg
- Replies: 6
- Views: 17686
Re: Molar Mass to Kg
From mol you would multiply by avogadro's number which would be 6.0221 x 10^23 and then multiply by 10^3 to convert from g to kg.
- Sat Nov 03, 2018 4:04 pm
- Forum: DeBroglie Equation
- Topic: Momentum
- Replies: 10
- Views: 1467
Re: Momentum
you can be given just mass and velocity and you would have to solve it yourself
- Thu Oct 25, 2018 10:13 am
- Forum: Einstein Equation
- Topic: Units
- Replies: 17
- Views: 1769
Re: Units
a Joule multiplied by 1/s is composed of 1kgm^2/s in its simplest form
- Thu Oct 25, 2018 10:08 am
- Forum: Properties of Light
- Topic: Problem B9
- Replies: 4
- Views: 424
Re: Problem B9
the 1.41x10^20 refers to the number of photons and you would then multiply that number with Avogadro's number
- Thu Oct 25, 2018 10:06 am
- Forum: Administrative Questions and Class Announcements
- Topic: Test On Tuesday
- Replies: 10
- Views: 1072
Re: Test On Tuesday
Wait we should know Lyman and Balmer?
- Wed Oct 17, 2018 11:14 pm
- Forum: Einstein Equation
- Topic: The symbol v?
- Replies: 16
- Views: 8861
The symbol v?
Why is the same symbol used for velocity and frequency? Is there a correlation/connection between them?
- Wed Oct 17, 2018 11:11 pm
- Forum: Einstein Equation
- Topic: Einstein's Equation: E=hv
- Replies: 11
- Views: 1574
Re: Einstein's Equation: E=hv
Planck's Constant which is 6.63*10^-34 Joule*seconds
- Wed Oct 17, 2018 11:09 pm
- Forum: Properties of Light
- Topic: Sig Figs in Problem 1.13 (6th Edition)
- Replies: 5
- Views: 471
Re: Sig Figs in Problem 1.13 (6th Edition)
It's supposed to be the lowest amount of sig figs from the problem but the TA's said that sig figs shouldn't matter
- Wed Oct 10, 2018 9:40 pm
- Forum: SI Units, Unit Conversions
- Topic: Ways to remember prefixes
- Replies: 7
- Views: 4884
Re: Ways to remember prefixes
I also thought it was only mil, kilo and pico
- Tue Oct 09, 2018 3:58 pm
- Forum: Balancing Chemical Reactions
- Topic: Where to start [ENDORSED]
- Replies: 10
- Views: 1421
Re: Where to start [ENDORSED]
My preference is looking for atoms that appear the fewest amount or looking for atoms with good multiple (3 to 6)
- Tue Oct 09, 2018 3:56 pm
- Forum: SI Units, Unit Conversions
- Topic: What is the notation for molar mass?
- Replies: 15
- Views: 4833
Re: What is the notation for molar mass?
in the textbook, it is grams/mol or g*mol^-1
- Tue Oct 09, 2018 3:54 pm
- Forum: Significant Figures
- Topic: Sig Fig zero rules
- Replies: 7
- Views: 2360
Re: Sig Fig zero rules
Zeros in front of a non-zero number after a decimal point is not counted as a significant figure but the zeros after a decimal point count as a significant figure.
- Thu Oct 04, 2018 4:40 pm
- Forum: Molarity, Solutions, Dilutions
- Topic: Periodic Table and Molar Mass?
- Replies: 2
- Views: 202
Periodic Table and Molar Mass?
Is the Periodic Table given out during the Test in discussion or is the molar mass of the elements just given on the test?
- Thu Oct 04, 2018 4:37 pm
- Forum: Significant Figures
- Topic: Avogadro's Constant Sig Fig?
- Replies: 3
- Views: 235
Re: Avogadro's Constant Sig Fig?
Yeah, That makes sense. Thanks!
- Thu Oct 04, 2018 4:36 pm
- Forum: Significant Figures
- Topic: Sig Figs
- Replies: 6
- Views: 515
Re: Sig Figs
400 only has one significant figure while 400. has three significant figures
- Thu Oct 04, 2018 4:28 pm
- Forum: Significant Figures
- Topic: Avogadro's Constant Sig Fig?
- Replies: 3
- Views: 235
Avogadro's Constant Sig Fig?
For a few of my questions, I've been using 6.02 times 10^23 as the number and it has caused some answers to be off by a decimal point. Is that okay or should I redo them?