Search found 19 matches

by StephanieRusnak
Sat Dec 09, 2017 4:06 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: effects on partial pressure
Replies: 2
Views: 377

Re: effects on partial pressure

increasing volume decreases pressure, decreasing volume increases pressure.
increasing temperature increases pressure
by StephanieRusnak
Sat Dec 09, 2017 4:04 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Exothermic Reaction
Replies: 3
Views: 337

Re: Exothermic Reaction

In this case, heat is a product of the reaction so when it is increased the reaction will shift left to the side of the reactants, causing K to decrease.
by StephanieRusnak
Tue Nov 28, 2017 9:51 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: What is 1/K? [ENDORSED]
Replies: 4
Views: 652

Re: What is 1/K? [ENDORSED]

if the equilibrium constant for a reaction is K then the equilibrium constant for its reverse reaction is 1/K.
by StephanieRusnak
Tue Nov 28, 2017 9:45 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: Qc and Qp
Replies: 2
Views: 1328

Re: Qc and Qp

no they don't always have this value. u have to calculate it using the concentration or pressure of the products and reactants.
by StephanieRusnak
Tue Nov 28, 2017 9:43 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: Difference betwen constant and quotient?
Replies: 4
Views: 446

Re: Difference betwen constant and quotient?

they're the same just different notation for when it's not at equilibrium
by StephanieRusnak
Tue Nov 28, 2017 9:39 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: Temperature
Replies: 4
Views: 541

Re: Temperature

if a reaction is endothermic, then it requires heat so if you think of heat as a reactant then it makes sense that it will shift towards the products when u increase heat

if a reaction is exothermic then think of heat as a product, increasing heat will make it shift towards the reactants
by StephanieRusnak
Sun Nov 19, 2017 8:21 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Bent or linear?
Replies: 11
Views: 901

Re: Bent or linear?

geometry doesnt depend on whether bonds are double/triple but on the electron domains so if there are no lone pairs on the central atom it is linear
by StephanieRusnak
Sun Nov 12, 2017 11:12 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: lewis structure and vsepr
Replies: 3
Views: 242

Re: lewis structure and vsepr

you don't have to but it's very helpful
by StephanieRusnak
Sun Nov 12, 2017 11:08 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Molecular shape vs Electron arrangement
Replies: 2
Views: 213

Re: Molecular shape vs Electron arrangement

electron arrangement has to do with the electron domain geometry which is different from the molecular geometry. for example, a central atom can have 4 electron domains but some of these can be lone pairs and not bonding pairs. if a central atom has 4 electron domains and 4 atoms bonded to it it's m...
by StephanieRusnak
Sun Nov 12, 2017 11:05 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Lone pairs versus bonding pairs
Replies: 3
Views: 439

Re: Lone pairs versus bonding pairs

lone pairs and bonding pairs both effect the shape of the molecule but there is stronger repulsion between lone pairs and other bonding pairs than bonding pairs and other bonding pairs
by StephanieRusnak
Thu Oct 26, 2017 8:42 pm
Forum: Trends in The Periodic Table
Topic: Trends of ionic radius
Replies: 4
Views: 355

Re: Trends of ionic radius

cations are positive, meaning they lost electrons and are smaller, whereas anions gain electrons and are larger
by StephanieRusnak
Thu Oct 26, 2017 8:35 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Electron Configuraiton
Replies: 2
Views: 230

Re: Electron Configuraiton

nope, its noble gas shorthand so you cant just use any element
by StephanieRusnak
Wed Oct 18, 2017 10:00 pm
Forum: Properties of Light
Topic: test 2 topic
Replies: 9
Views: 701

Re: test 2 topic

I think just focus on lecture notes and do a bunch of homework problems and thats pretty much everything we need to know
by StephanieRusnak
Wed Oct 18, 2017 9:59 pm
Forum: Properties of Light
Topic: the quantum world
Replies: 7
Views: 453

Re: the quantum world

I think it's best to just know that visible light is 400-700 nm
by StephanieRusnak
Wed Oct 18, 2017 9:55 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Question about energy levels [ENDORSED]
Replies: 8
Views: 557

Re: Question about energy levels [ENDORSED]

I think theoretically, n can be infinitely large but realistically they would not be larger than 7-9
by StephanieRusnak
Wed Oct 18, 2017 9:51 pm
Forum: Properties of Electrons
Topic: Calculate energy required to remove an electron
Replies: 6
Views: 2840

Re: Calculate energy required to remove an electron

Use the equation: kinetic energy of ejected photon = energy supplied by photon - work function (energy required to eject electron)
by StephanieRusnak
Sat Oct 07, 2017 7:38 pm
Forum: Balancing Chemical Reactions
Topic: Question about Moles of a Compound in a Balanced Chemical Equation [ENDORSED]
Replies: 3
Views: 582

Re: Question about Moles of a Compound in a Balanced Chemical Equation [ENDORSED]

Mass is still conserved because there is the same number of atoms on both sides of the equation. Moles can be produced/lost but mass cannot
by StephanieRusnak
Sat Oct 07, 2017 7:30 pm
Forum: Molarity, Solutions, Dilutions
Topic: Molarity unit [ENDORSED]
Replies: 11
Views: 1038

Re: Molarity unit [ENDORSED]

I would say always use mol/L for molarity, even if in certain calculations the L will cancel, I think its best to show your understanding of the definition of molarity.

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