Search found 30 matches

by Tyler Vu 4I
Sat Dec 08, 2018 12:26 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7022
Views: 771746

Re: Post All Chemistry Jokes Here

What is Garfield's favorite part of chemistry? Lanthanum-Sulfur-Silver-Sodium
by Tyler Vu 4I
Sat Dec 08, 2018 12:19 am
Forum: Dipole Moments
Topic: Polarity in Trigonal bipyramidal structures
Replies: 1
Views: 25

Re: Polarity in Trigonal bipyramidal structures

Trigonal bipyramidal is a very symmetrical shape so individual dipole-dipole moments cancel and there is no net dipole moment.
by Tyler Vu 4I
Sat Dec 08, 2018 12:08 am
Forum: Naming
Topic: mono- prefix
Replies: 2
Views: 18

Re: mono- prefix

The prefix is used when there is one ligand type in the complex ion. It would probably be best to include it to be as specific as possible.
by Tyler Vu 4I
Sat Dec 08, 2018 12:03 am
Forum: Shape, Structure, Coordination Number, Ligands
Topic: H20
Replies: 2
Views: 19

Re: H20

H2O has a zero net charge because it has the same number of protons and electrons overall. However, it is highly polar at the hydrogen and oxygen ends.
by Tyler Vu 4I
Fri Dec 07, 2018 11:54 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Factors for Acid Stength [ENDORSED]
Replies: 3
Views: 56

Re: Factors for Acid Stength [ENDORSED]

Resonance will increase the stability of the conjugate base so the acidity will be increased as well. A larger atom can accommodate a negative charge better so the base will be more stable and the acid will be stronger. If an atom has a larger electronegativity, it will be less inclined to share ele...
by Tyler Vu 4I
Fri Dec 07, 2018 11:43 pm
Forum: Significant Figures
Topic: Sig Figs in pH and OH
Replies: 1
Views: 32

Re: Sig Figs in pH and OH

The number to the left of the decimal point does not affect significant figures. This is important for the log calculation.
by Tyler Vu 4I
Fri Dec 07, 2018 11:37 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Polydentate
Replies: 11
Views: 98

Re: Polydentate

Ligands with more than one bonded atom (central metal atom) are considered polydentate. The prefixes mentioned are used with composite ligand names to avoid confusion.
by Tyler Vu 4I
Mon Nov 26, 2018 10:19 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Oxidation number
Replies: 9
Views: 57

Re: Oxidation number

The oxidation number is the number of electrons gained or lost by an atom of an element.
by Tyler Vu 4I
Mon Nov 26, 2018 10:16 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Polarity
Replies: 2
Views: 44

Re: Polarity

If you draw the ring structure for the molecule, it is not symmetrical. This means it is polar.
by Tyler Vu 4I
Mon Nov 26, 2018 10:13 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: NaCl vs. NiCl
Replies: 3
Views: 44

Re: NaCl vs. NiCl

Water completely dissociates Na and Cl in salt and surrounds the atoms. The water donates electron pairs to Ni in NiCl and forms coordinate compounds.
by Tyler Vu 4I
Mon Nov 26, 2018 10:10 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7022
Views: 771746

Re: Post All Chemistry Jokes Here

The formula for ice is H2O^cubed
by Tyler Vu 4I
Mon Nov 26, 2018 10:08 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7022
Views: 771746

Re: Post All Chemistry Jokes Here

What do you call a pawsitive kitten? A cation
by Tyler Vu 4I
Mon Nov 26, 2018 10:03 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Cis and Trans
Replies: 10
Views: 78

Re: Cis and Trans

The cis or trans property of the molecule depends on its polarity. This means cis or trans is more beneficial to a molecule depending on its function.
by Tyler Vu 4I
Mon Nov 12, 2018 7:38 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Net Number Of Moles
Replies: 5
Views: 127

Re: Net Number Of Moles

The total moles produced minus the total moles of reactants yields the net moles produced during the reaction.
by Tyler Vu 4I
Mon Nov 12, 2018 3:27 pm
Forum: Hybridization
Topic: Electron densisty
Replies: 5
Views: 179

Re: Electron densisty

The first part is drawing the full Lewis structure diagram. Then the bonds and lone pair electrons on the central atom determine electron density.
by Tyler Vu 4I
Mon Nov 12, 2018 3:12 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Bond Angles
Replies: 4
Views: 27

Re: Bond Angles

The values of the angles will be close to the ones you mentioned, but lone pair electrons and electron repulsion can change them slightly.
by Tyler Vu 4I
Mon Nov 12, 2018 11:41 am
Forum: Ionic & Covalent Bonds
Topic: Boiling Point
Replies: 3
Views: 66

Re: Boiling Point

Bond strength, the size of the compounds, molecular weight, and looking at the boiling points of similar compounds can all help determine which has a higher boiling point.
by Tyler Vu 4I
Mon Nov 12, 2018 11:38 am
Forum: Ionic & Covalent Bonds
Topic: Examples
Replies: 2
Views: 49

Re: Examples

An example of dipole moments occurs in the water molecule. The unequal sharing of electrons creates slightly positive and negative ends of the molecule.
by Tyler Vu 4I
Mon Nov 12, 2018 11:27 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: Examples of intermolecular forces
Replies: 2
Views: 35

Re: Examples of intermolecular forces

An example of dispersion forces is the non polar carbon dioxide molecule. Dispersion forces are considered Van der Waals forces, which occur between molecules. Hydrogen bonding can be observed between water molecules or N,O,or F bonds with hydrogen. These are important to know because they help us b...
by Tyler Vu 4I
Mon Oct 29, 2018 10:23 pm
Forum: Limiting Reactant Calculations
Topic: Limiting Reagent
Replies: 10
Views: 203

Re: Limiting Reagent

You can still calculate the amount of product that each reagent produces and then the lowest one or ones would be the limiting reagent.
by Tyler Vu 4I
Mon Oct 29, 2018 10:21 pm
Forum: Balancing Chemical Reactions
Topic: How To....
Replies: 16
Views: 338

Re: How To....

It is hard to memorize the states of matter for every equation but there are a lot of easy ones to remember. Understanding the states of the reactants can let us know if there is a precipitate out of solution.
by Tyler Vu 4I
Mon Oct 29, 2018 10:19 pm
Forum: SI Units, Unit Conversions
Topic: Remembering Unit Conversions
Replies: 5
Views: 180

Re: Remembering Unit Conversions

For most of them I use, The Girl Flies Kites Because Dark December Comes Many Months Next
by Tyler Vu 4I
Mon Oct 29, 2018 10:17 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7022
Views: 771746

Re: Post All Chemistry Jokes Here

https://www.google.com/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&ved=2ahUKEwjz-PLkwa3eAhXCg1QKHdvVB0QQjRx6BAgBEAU&url=https%3A%2F%2Fwiring-design.com%2Fbest-25-chemistry-jokes-ideas-on-pinterest-funny-nerd%2F&psig=AOvVaw1kc8SQpKq7bzPHMhS_xmj0&ust=1540966229157001...
by Tyler Vu 4I
Mon Oct 29, 2018 10:14 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7022
Views: 771746

Re: Post All Chemistry Jokes Here

I heard that oxygen and magnesium were going out and I was like OMg
by Tyler Vu 4I
Mon Oct 29, 2018 10:12 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7022
Views: 771746

Re: Post All Chemistry Jokes Here

I would post another chemistry joke, but all the funny ones argon
by Tyler Vu 4I
Mon Oct 29, 2018 10:07 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7022
Views: 771746

Re: Post All Chemistry Jokes Here

During midterm szn try to be like a proton and stay positive
by Tyler Vu 4I
Thu Oct 25, 2018 9:05 am
Forum: Trends in The Periodic Table
Topic: Ionization Energies
Replies: 3
Views: 47

Re: Ionization Energies

Losing four electrons would require a large amount of energy. The ionization energies for 4 electron removals with the elements of the group 14 would be very high. This way it would be more likely for them to gain 4 electrons to reach a stable state.
by Tyler Vu 4I
Wed Oct 24, 2018 11:10 am
Forum: Photoelectric Effect
Topic: Conditions that allow electron to be ejected from metal surface
Replies: 12
Views: 182

Re: Conditions that allow electron to be ejected from metal surface

There needs to be enough energy to eject an electron and give it kinetic energy once ejected. This is obtained when a photon has enough energy and the light has surpassed the threshold frequency.
by Tyler Vu 4I
Wed Oct 24, 2018 11:03 am
Forum: SI Units, Unit Conversions
Topic: Sig Figs
Replies: 8
Views: 192

Re: Sig Figs

The question will give a value or values of something with sig figs. The lowest number of sig figs in the given value(s) should be used for the answer.
by Tyler Vu 4I
Wed Oct 24, 2018 9:31 am
Forum: Properties of Light
Topic: kg or g [ENDORSED]
Replies: 11
Views: 181

Re: kg or g [ENDORSED]

Since kg is the SI unit, we would want to use that over grams.

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