Search found 31 matches

by Shundeen Martinez 1D
Fri Dec 07, 2018 1:43 pm
Forum: Bronsted Acids & Bases
Topic: Lewis Acids and Bases and Bronsted?
Replies: 5
Views: 98

Lewis Acids and Bases and Bronsted?

What is the difference between lewis acids and bases and bronsted acids and bases? And how can you determine both?
by Shundeen Martinez 1D
Fri Dec 07, 2018 1:41 pm
Forum: Naming
Topic: Naming Fe coordination compounds
Replies: 4
Views: 90

Re: Naming Fe coordination compounds

There are some weird rules regarding naming, iron can be ferrous and water has to be aqua. I'm pretty sure Lavelle has a link to naming rules on his main class website if you need more help.
by Shundeen Martinez 1D
Fri Dec 07, 2018 1:39 pm
Forum: Lewis Acids & Bases
Topic: Weak Acids/Bases?
Replies: 5
Views: 127

Weak Acids/Bases?

What would be considered a weak acid/base? And how do you know it's weak?
by Shundeen Martinez 1D
Sun Dec 02, 2018 8:14 pm
Forum: Hybridization
Topic: S Hybridization?
Replies: 5
Views: 98

S Hybridization?

Can something just have a hybridization of s if it only is connected to one region of electron density?
by Shundeen Martinez 1D
Sun Dec 02, 2018 8:09 pm
Forum: Hybridization
Topic: Double and Triple Bonds
Replies: 17
Views: 234

Double and Triple Bonds

Do double and triple bonds change the hybridization of an atom?
by Shundeen Martinez 1D
Sun Dec 02, 2018 8:03 pm
Forum: Hybridization
Topic: Sigma bonds
Replies: 9
Views: 141

Sigma bonds

Why can there be multiple pi bonds but only one sigma bond?
by Shundeen Martinez 1D
Tue Nov 20, 2018 8:23 pm
Forum: Lewis Structures
Topic: Lewis structure for POCl3
Replies: 7
Views: 229

Re: Lewis structure for POCl3

It is the only one out of the three that has an expanded octet.
by Shundeen Martinez 1D
Tue Nov 20, 2018 8:21 pm
Forum: Hybridization
Topic: Test 3
Replies: 8
Views: 173

Re: Test 3

Each test covers everything on from what we learn after the test before begins.
by Shundeen Martinez 1D
Tue Nov 20, 2018 8:20 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Molecular Size
Replies: 3
Views: 95

Re: Molecular Size

Do you mean atomic radius?
by Shundeen Martinez 1D
Tue Nov 20, 2018 8:12 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: VSEPR
Replies: 2
Views: 74

Re: VSEPR

We will probably have to since we did do that on class in Monday with Ethene.
by Shundeen Martinez 1D
Tue Nov 20, 2018 8:11 pm
Forum: Hybridization
Topic: Unhybridized orbitals
Replies: 10
Views: 232

Re: Unhybridized orbitals

Hybridization depends on the shape of the molecule and is the shape of the molecule.
by Shundeen Martinez 1D
Tue Nov 20, 2018 8:07 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: VSEPR
Replies: 5
Views: 124

VSEPR

Do lone pairs affect the shape and name of a structure?
by Shundeen Martinez 1D
Tue Nov 20, 2018 8:03 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Bond Angles
Replies: 13
Views: 244

Re: Bond Angles

Also when can we know that bond angles are less than what they usually are? Like I remember in lecture Lavelle said a bond angle was 106.5 degrees.
by Shundeen Martinez 1D
Fri Nov 09, 2018 11:42 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Different Shapes
Replies: 4
Views: 86

Different Shapes

I vaguely remember molecular shapes from high school, what are the shapes again? And how can you find out the shape?
by Shundeen Martinez 1D
Fri Nov 09, 2018 11:40 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Bond Angles
Replies: 13
Views: 244

Bond Angles

What are bond angles and how can you predict them?
by Shundeen Martinez 1D
Fri Nov 09, 2018 11:39 am
Forum: Determining Molecular Shape (VSEPR)
Topic: VSEPR Formula
Replies: 2
Views: 81

VSEPR Formula

How can you find a VSEPR formula?
by Shundeen Martinez 1D
Tue Oct 30, 2018 11:19 pm
Forum: Trends in The Periodic Table
Topic: Electron Affinity???
Replies: 3
Views: 128

Electron Affinity???

Why does Sulfur have a higher electron affinity than Oxygen if it is below Oxygen on the periodic table?
by Shundeen Martinez 1D
Tue Oct 30, 2018 10:29 pm
Forum: Lewis Structures
Topic: Lewis Structures- formal charge
Replies: 4
Views: 123

Lewis Structures- formal charge

How can you find the formal charges on each atom in a Lewis structure?
by Shundeen Martinez 1D
Tue Oct 30, 2018 10:28 pm
Forum: Lewis Structures
Topic: Valence Electrons
Replies: 7
Views: 111

Valence Electrons

Which elements can have more than 8 valence electrons when being bonded?
by Shundeen Martinez 1D
Fri Oct 26, 2018 2:11 pm
Forum: Lewis Structures
Topic: Double and Triple Bonds???
Replies: 2
Views: 45

Double and Triple Bonds???

When do you bond with double and triple lines? I vaguely remember them in high school but I don't understand them anymore.
by Shundeen Martinez 1D
Fri Oct 26, 2018 2:07 pm
Forum: Ionic & Covalent Bonds
Topic: Ground State Electron Configurations
Replies: 7
Views: 100

Re: Ground State Electron Configurations

To make sure that the electron configuration is not extremely long, you use noble gasses. The last noble gas before Copper is Argon, which counts for 18, and you then have to find the configuration for the remaining amount of electrons. (Cu) 29- (Ar)18=11 electrons
by Shundeen Martinez 1D
Fri Oct 26, 2018 2:02 pm
Forum: Lewis Structures
Topic: Lewis Structures
Replies: 8
Views: 97

Lewis Structures

When Professor Lavelle was doing the Lewis structures in class today, the only thing I was confused on was how he knew how many dots to put around each element?
by Shundeen Martinez 1D
Fri Oct 19, 2018 3:42 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Slight Confusion
Replies: 3
Views: 86

Re: Slight Confusion

I am pretty sure it is also dx dy dz but I am not sure about the second part of your question.
by Shundeen Martinez 1D
Fri Oct 19, 2018 3:36 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: energy in shells closer to the nucleus
Replies: 4
Views: 91

Re: energy in shells closer to the nucleus

Since the electrons are closer to the nucleus, they are closer to a positive charge which then makes the energy level of the electron lower.
by Shundeen Martinez 1D
Fri Oct 19, 2018 3:32 pm
Forum: Administrative Questions and Class Announcements
Topic: Chem Community Due Date
Replies: 6
Views: 177

Chem Community Due Date

When specifically is the last day we can post on Chemistry Community to get credit for the week?
by Shundeen Martinez 1D
Fri Oct 12, 2018 1:24 am
Forum: Balancing Chemical Reactions
Topic: Writing Chemical Equations
Replies: 2
Views: 328

Re: Writing Chemical Equations

Yea we definitely have not learned that yet. If I can recall correctly, I'm pretty sure Professor Lavelle said it was okay if we couldn't do that yet. I'm not sure if we need to or even will eventually learn that in this quarter.
by Shundeen Martinez 1D
Fri Oct 12, 2018 1:13 am
Forum: Significant Figures
Topic: significant figures
Replies: 5
Views: 366

Re: significant figures

Yes, you use 3 sig figs in that situation.
by Shundeen Martinez 1D
Fri Oct 12, 2018 1:11 am
Forum: SI Units, Unit Conversions
Topic: Homework for Week 2
Replies: 16
Views: 319

Re: Homework for Week 2

They are collecting them during discussions now so don't forget to bring your homework to discussion!
by Shundeen Martinez 1D
Thu Oct 04, 2018 8:34 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Molecular weight vs molar mass
Replies: 3
Views: 83

Re: Molecular weight vs molar mass

The only difference are the units. The numbers remain the same. The units for molecular weight are in atomic mass units and the units for molar mass are in grams per mole.
by Shundeen Martinez 1D
Thu Oct 04, 2018 8:31 pm
Forum: Limiting Reactant Calculations
Topic: Limiting Reactant vs. Reagent??? [ENDORSED]
Replies: 6
Views: 165

Limiting Reactant vs. Reagent??? [ENDORSED]

What's the difference between a reactant and a reagent? Are they just used interchangeably?
by Shundeen Martinez 1D
Tue Oct 02, 2018 12:25 pm
Forum: Empirical & Molecular Formulas
Topic: Empirical Formula Calculations
Replies: 2
Views: 105

Empirical Formula Calculations

When calculating the empirical formula and calculating whole atoms by dividing by the smallest value, can I round if the number I get is not a whole number? For example if I got something like 4.93, could I round it to 5?

Go to advanced search