Search found 31 matches

by Manya Kidambi 3I
Sun Dec 09, 2018 9:42 am
Forum: Conjugate Acids & Bases
Topic: Stability of Conjugate Base
Replies: 6
Views: 435

Re: Stability of Conjugate Base

A main reason for stability is attributed to resonance.
by Manya Kidambi 3I
Mon Dec 03, 2018 11:23 pm
Forum: Naming
Topic: Prefix bis, tris, tetrakis, etc. [ENDORSED]
Replies: 5
Views: 193

Re: Prefix bis, tris, tetrakis, etc. [ENDORSED]

An example of this - if you had (en)3 (ethylenediamine) for example, it would be tris-ethylenediamine.
by Manya Kidambi 3I
Mon Dec 03, 2018 11:19 pm
Forum: Conjugate Acids & Bases
Topic: Weak Acid, Strong Base
Replies: 1
Views: 76

Weak Acid, Strong Base

Why is it that the conjugate base of a weak acid is a strong base?
by Manya Kidambi 3I
Sun Dec 02, 2018 6:39 pm
Forum: Amphoteric Compounds
Topic: Examples
Replies: 6
Views: 123

Examples

What are some examples of amphoteric compounds other than water?
by Manya Kidambi 3I
Sun Dec 02, 2018 6:36 pm
Forum: Naming
Topic: Metal Prefixes
Replies: 2
Views: 84

Metal Prefixes

In example 17.29, Iron becomes ferro-. Do we need to know the names of metals used in coordination compounds? (such as argentate for silver, stannate for tin, etc.)
by Manya Kidambi 3I
Sun Dec 02, 2018 11:44 am
Forum: Naming
Topic: IUPAC
Replies: 2
Views: 73

IUPAC

What does the New IUPAC Name Convention mean? It's on the reference sheet posted on Dr. Lavelle's website.
by Manya Kidambi 3I
Sun Nov 25, 2018 5:22 pm
Forum: Hybridization
Topic: Test 3
Replies: 13
Views: 193

Re: Test 3

We should probably be able to identify the shape and hybridization of a molecule, based on the ones Dr. Lavelle provided in class.
by Manya Kidambi 3I
Sun Nov 25, 2018 5:19 pm
Forum: Bond Lengths & Energies
Topic: Bonds in Water
Replies: 5
Views: 108

Re: Bonds in Water

Hydrogen bonds are involved in helping water molecules bond to other water molecules.
Covalent bonds are actually within the water molecule and bond the Hs and Os together.
by Manya Kidambi 3I
Sun Nov 25, 2018 5:17 pm
Forum: Administrative Questions and Class Announcements
Topic: Test 3
Replies: 6
Views: 188

Re: Test 3

Most likely yes, since we went over them in class.
by Manya Kidambi 3I
Sat Nov 17, 2018 3:32 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Formula for determining bond angle
Replies: 6
Views: 153

Re: Formula for determining bond angle

There isn't really a formula, I would just know the values of the main shapes. For example, know that trigonal planar is 120, tetrahedral is 109.5, and if there is a lone pair instead of a bond (such as in trigonal pyramidal), it would be slightly less than 109.5.
by Manya Kidambi 3I
Sat Nov 17, 2018 3:20 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Planar vs Pyramidal
Replies: 5
Views: 118

Re: Planar vs Pyramidal

With reference to trigonal planar, it has 3 bonds with no lone pairs. However, trigonal pyramidal has 3 bonds with one lone pair, thereby giving it a tetrahedral arrangement but a trigonal pyramidal shape. With regards to the bond angles, those in a trigonal planar would be 120, while those in a tri...
by Manya Kidambi 3I
Sat Nov 17, 2018 3:17 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Triple Bonds
Replies: 2
Views: 55

Triple Bonds

Why is it that triple bonds have 1 sigma and two pi bonds?
by Manya Kidambi 3I
Sat Nov 10, 2018 5:08 pm
Forum: Resonance Structures
Topic: Expanded Octet and Resonance
Replies: 2
Views: 111

Expanded Octet and Resonance

Can an atom without an expanded octet have resonance with more than 4 single bonds?
by Manya Kidambi 3I
Sat Nov 10, 2018 5:05 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Remembering VSEPR
Replies: 2
Views: 69

Remembering VSEPR

What’s the easiest way to remember the VSEPR shapes?
by Manya Kidambi 3I
Sat Nov 10, 2018 4:59 pm
Forum: Ionic & Covalent Bonds
Topic: Covalent Character
Replies: 1
Views: 91

Covalent Character

I’m still confused on how exactly covalent character works, is there a simple way to remember this? Thank you!
by Manya Kidambi 3I
Sat Nov 03, 2018 12:52 pm
Forum: DeBroglie Equation
Topic: HW 1.33b
Replies: 2
Views: 263

HW 1.33b

For homework problem 1.33, why is it that E = h is used in part b as opposed to the work function? Isn't the energy required to release the electron the same as the threshold energy, or ?
by Manya Kidambi 3I
Fri Nov 02, 2018 11:00 am
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Key Words
Replies: 4
Views: 110

Re: Key Words

Not necessarily keywords but great resources are The Organic Chemistry Tutor's video on YouTube, or Crash Course Chemistry. They go through all the key concepts for a particular subject and make it easier to remember.
by Manya Kidambi 3I
Fri Nov 02, 2018 10:58 am
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Diamagnetic/Paramagnetic
Replies: 1
Views: 76

Diamagnetic/Paramagnetic

Hi,

In one of the review worksheets posted, there was a question on paramagnetic and diamagnetic electrons, do we need to know this for the midterm?
Also, should we know hybridization?
Thanks!
by Manya Kidambi 3I
Thu Nov 01, 2018 12:17 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Losing Electrons
Replies: 2
Views: 70

Losing Electrons

When forming ions, do atoms first lose electrons from the 4p or 3d subshell? This is assuming 2 electrons have already been lost from the 4s subshell.
by Manya Kidambi 3I
Sat Oct 27, 2018 3:43 pm
Forum: Quantum Numbers and The H-Atom
Topic: Quantum Numbers
Replies: 5
Views: 141

Re: Quantum Numbers

You would have to draw out the orbital diagram. If the arrow is pointing up, it is +1/2 and if it is pointing down it is -1/2.
by Manya Kidambi 3I
Sat Oct 27, 2018 3:42 pm
Forum: Administrative Questions and Class Announcements
Topic: Midterm
Replies: 7
Views: 280

Re: Midterm

It would probably just be on what we've done in class so far, unless stated otherwise.
by Manya Kidambi 3I
Sat Oct 27, 2018 3:41 pm
Forum: Sigma & Pi Bonds
Topic: determining which bonds are in a molecule
Replies: 4
Views: 174

Re: determining which bonds are in a molecule

Yes! You would have to write it out to find out the number of valence electrons, then you add them all up to figure out how many you need to place around your molecule.
by Manya Kidambi 3I
Sat Oct 20, 2018 8:24 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Uncertainty
Replies: 3
Views: 81

Uncertainty

I'm having a bit of trouble understanding the uncertainty equation, why is it that the more certain you are about the momentum, the less certain you are about the position? Thank you!
by Manya Kidambi 3I
Sat Oct 20, 2018 8:20 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: 4th quantum number question [ENDORSED]
Replies: 3
Views: 103

Re: 4th quantum number question [ENDORSED]

+1/2 means an electron is spinning up, while -1/2 means it is spinning down. These are the only two values that the fourth quantum number can be. An example: Electron configuration 2p3. If you draw the orbital diagram, you have one arrow up and one down in the first electron pair, and one arrow up i...
by Manya Kidambi 3I
Sat Oct 20, 2018 8:13 pm
Forum: Properties of Electrons
Topic: Balmer vs Lyman Series [ENDORSED]
Replies: 5
Views: 104

Re: Balmer vs Lyman Series [ENDORSED]

Lyman series occur in the UV spectrum. This means that the electron is going to the first energy level (n = 1). In a Balmer series, this is occurring in the visible light spectrum. So the electron will go to the second energy level, or n = 2. For this particular problem, you can assume that the nFin...
by Manya Kidambi 3I
Sun Oct 14, 2018 12:03 pm
Forum: Properties of Light
Topic: Speed of Light
Replies: 41
Views: 742

Re: Speed of Light

You should treat it as a constant in any sort of calculations done for this class. I’m sure for higher level chemistry this would be different, but at this point I wouldn’t worry.
by Manya Kidambi 3I
Wed Oct 10, 2018 10:07 am
Forum: Molarity, Solutions, Dilutions
Topic: Finding the volume of stock solution to dilute
Replies: 13
Views: 476

Re: Finding the volume of stock solution to dilute

Unless the problem specifically states that you need to keep the answer in L or convert it to mL, I wouldn't worry about it. However, since Molarity = moles/liters, it's a good idea to convert in the beginning itself.
by Manya Kidambi 3I
Wed Oct 10, 2018 9:52 am
Forum: Photoelectric Effect
Topic: Packets of Energy
Replies: 2
Views: 56

Packets of Energy

Can someone explain the concept of quanta being "packets of energy?" I'm having trouble visualizing this. (6th Edition page 11)
by Manya Kidambi 3I
Fri Oct 05, 2018 1:04 pm
Forum: Properties of Light
Topic: Behavior of small objects - clarification
Replies: 3
Views: 65

Behavior of small objects - clarification

Can someone explain what Dr. Lavelle meant by one discrete H2O molecule? I understand the concept of the water poured from the bucket, but the other part confused me.
by Manya Kidambi 3I
Wed Oct 03, 2018 11:55 pm
Forum: Significant Figures
Topic: Decimal point
Replies: 14
Views: 277

Decimal point

Can someone explain the difference in sig figs between 125 and 125. , if there is one?
by Manya Kidambi 3I
Wed Oct 03, 2018 11:23 pm
Forum: Significant Figures
Topic: Sig Figs... when to round?
Replies: 7
Views: 167

Re: Sig Figs... when to round?

To add on to what has already been said, it really helps if you store the value in your calculator as you are solving. That way, you get the most accurate answer. If you round as you go, your answer will probably be off by a few digits.

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