Search found 48 matches

by duenezjuleny1D
Wed Jul 31, 2019 2:10 am
Forum: Ionic & Covalent Bonds
Topic: Boiling Point
Replies: 4
Views: 324

Boiling Point

how can you determine if something has a higher or lower boiling point than the other?
by duenezjuleny1D
Wed Jul 31, 2019 2:09 am
Forum: Sigma & Pi Bonds
Topic: Resonance [ENDORSED]
Replies: 3
Views: 318

Resonance [ENDORSED]

how exactly do you determine if a molecule has resonance?
by duenezjuleny1D
Wed Jul 31, 2019 2:07 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Radical Atoms ?
Replies: 1
Views: 126

Radical Atoms ?

what does it mean for something to be radical and how does it become radical?
by duenezjuleny1D
Wed Jul 31, 2019 2:07 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Diff Sigma btw Pi Bonds
Replies: 1
Views: 135

Diff Sigma btw Pi Bonds

How do you determine the difference between sigma and pi bonds?
by duenezjuleny1D
Wed Jul 31, 2019 2:05 am
Forum: Naming
Topic: Naming/Coord Comp
Replies: 2
Views: 157

Naming/Coord Comp

when naming how do you begin/what goes first and how do you know?
by duenezjuleny1D
Wed Jul 31, 2019 2:04 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: Polar v nonPolar
Replies: 4
Views: 456

Polar v nonPolar

How do you identify whether or not something is polar or non polar? what does it depend on?
by duenezjuleny1D
Wed Jul 31, 2019 2:03 am
Forum: Determining Molecular Shape (VSEPR)
Topic: VSEPR
Replies: 2
Views: 161

VSEPR

What is the difference between a vsepr formula and Lewis structures? What exactly is a vsepr formula supposed to look
by duenezjuleny1D
Wed Jul 31, 2019 2:02 am
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Rydberg Equation
Replies: 3
Views: 335

Rydberg Equation

in the rydberg equation En= (-hR)/(n^2) why is there a negative included?
by duenezjuleny1D
Wed Jul 31, 2019 2:01 am
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Uncertainty Principal
Replies: 1
Views: 312

Uncertainty Principal

how is it that decreasing the uncertainty in momentum affects the uncertainty in wavelength? can someone explain how wavelength is affected?
by duenezjuleny1D
Wed Jul 31, 2019 2:01 am
Forum: Lewis Structures
Topic: Octet
Replies: 2
Views: 456

Octet

how does an atom or molecule not follow the octet rules? how do you explain them?
by duenezjuleny1D
Wed Jul 31, 2019 2:00 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Formal Charge
Replies: 9
Views: 398

Formal Charge

When making a Lewis structure for an ion, does it matter what atom the formal charge is on, or the structure is valid as long as the overall formal charge is correct?
by duenezjuleny1D
Fri Jun 28, 2019 10:43 am
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Theoretical/Actual Yield
Replies: 6
Views: 260

Re: Theoretical/Actual Yield

Usually in grams since most of the problems give to us will be in grams. But I also depends on if you’re converting/how you will convert.
by duenezjuleny1D
Fri Jun 28, 2019 10:41 am
Forum: SI Units, Unit Conversions
Topic: Use of Kelvin
Replies: 6
Views: 291

Re: Use of Kelvin

0 Kelvin is at absolute zero. Because you can't have negative kinetic energy, you can't go past zero.When at absolute zero, the particles stop moving.
by duenezjuleny1D
Fri Jun 28, 2019 10:38 am
Forum: Balancing Chemical Reactions
Topic: Combustion Equation
Replies: 21
Views: 837

Re: Combustion Equation

Yes in combustion reactions there will always be oxygen and a hydrocarbon as reactants and will always produce CO2 and H2O. Sometimes they can add nitrogen, N, but I believe you would be told to depending on the problem.
by duenezjuleny1D
Fri Jun 28, 2019 10:36 am
Forum: SI Units, Unit Conversions
Topic: Limiting Reactants
Replies: 5
Views: 243

Re: Limiting Reactants

No he stated in lecture that anything like that would be provided in the question/problem assigned.
by duenezjuleny1D
Wed Jun 26, 2019 11:04 am
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Balancing Equations [ENDORSED]
Replies: 25
Views: 376

Balancing Equations [ENDORSED]

When balancing an equation in lecture prof Lavelle multiplied the entire equation by 2 in order to get the lowest whole number. Will points be deducted on the test if we don’t do so ?
by duenezjuleny1D
Wed Jun 26, 2019 10:58 am
Forum: Balancing Chemical Reactions
Topic: Combustion Equation
Replies: 21
Views: 837

Re: Combustion Equation

They will usually be “--> CO2 + H2O” but in reality it can change or form other compounds.
by duenezjuleny1D
Wed Jun 26, 2019 10:55 am
Forum: Balancing Chemical Reactions
Topic: Why do we balance chemical equations?
Replies: 13
Views: 536

Re: Why do we balance chemical equations?

We want to make sure not break the law of conservation of mass. It is important to balance on each side, the products and the reactants.
by duenezjuleny1D
Sat Dec 08, 2018 8:13 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Radicals
Replies: 2
Views: 90

Radicals

what does it mean for something to be radical and how does it become radical?
by duenezjuleny1D
Sat Dec 08, 2018 8:12 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: polarity
Replies: 1
Views: 116

polarity

how do you determine the polarity of a central atom?
by duenezjuleny1D
Sat Dec 08, 2018 8:09 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: determining the coordination compound
Replies: 1
Views: 73

determining the coordination compound

when determining the coordination compound do we only count the number of bonds on to the central metal? or do we count the outer bonds as well?
by duenezjuleny1D
Sat Dec 08, 2018 8:07 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Ligands
Replies: 1
Views: 62

Ligands

What does it mean for Ligands to be cisplatin?
by duenezjuleny1D
Sat Dec 08, 2018 8:07 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Identifying Ligands
Replies: 1
Views: 76

Identifying Ligands

when identifying ligands are there any exceptions in which a molecule will and can only be monodentate or bidentate etc.?
by duenezjuleny1D
Sat Dec 08, 2018 8:01 pm
Forum: Lewis Acids & Bases
Topic: affects on acids
Replies: 2
Views: 72

affects on acids

what is the affect that salt and water can have on acids?
by duenezjuleny1D
Sat Dec 08, 2018 7:58 pm
Forum: Lewis Acids & Bases
Topic: water as a lewis base
Replies: 1
Views: 58

water as a lewis base

why is water always a lewis base and are there any other exceptions in which something is always a lewis base?
by duenezjuleny1D
Sat Dec 08, 2018 7:56 pm
Forum: Lewis Acids & Bases
Topic: acids and bases
Replies: 2
Views: 213

acids and bases

how are you able to determine weak acids and bases? what makes them weak or strong?
by duenezjuleny1D
Sat Dec 08, 2018 7:54 pm
Forum: Sigma & Pi Bonds
Topic: resonance
Replies: 3
Views: 236

resonance

how exactly do you determine if a molecule has resonance?
by duenezjuleny1D
Sat Dec 08, 2018 7:52 pm
Forum: Sigma & Pi Bonds
Topic: pi and sigma bonds
Replies: 1
Views: 225

pi and sigma bonds

how many pi or sigma bonds would there be in a triple bond?
by duenezjuleny1D
Sat Dec 08, 2018 7:51 pm
Forum: Ionic & Covalent Bonds
Topic: boiling point
Replies: 3
Views: 170

boiling point

how can you determine if something has a higher or lower boiling point than the other?
by duenezjuleny1D
Sat Dec 08, 2018 7:49 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Uncertainty principle question
Replies: 2
Views: 244

Re: Uncertainty principle question

you would have to double it therefore it would be 0.8m/s
by duenezjuleny1D
Sat Dec 08, 2018 7:48 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: heisenberg's
Replies: 5
Views: 326

heisenberg's

for heisenberg principal is the greater then or equal to sign used as the equal sign?
by duenezjuleny1D
Sat Dec 08, 2018 7:46 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Uncertainty Principal
Replies: 1
Views: 257

Uncertainty Principal

how is it that decreasing the uncertainty in momentum affects the uncertainty in wavelength? can someone explain how wavelength is affected?
by duenezjuleny1D
Sat Dec 08, 2018 7:39 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: rydberg equation
Replies: 1
Views: 202

rydberg equation

in the rydberg equation En= (-hR)/(n^2) why is there a negative included?
by duenezjuleny1D
Sat Dec 08, 2018 7:30 pm
Forum: Lewis Structures
Topic: octet
Replies: 1
Views: 96

octet

how does an atom or molecule not follow the octet rules? how do you explain them?
by duenezjuleny1D
Sat Dec 08, 2018 7:22 pm
Forum: Photoelectric Effect
Topic: work function
Replies: 4
Views: 307

work function

how do you find the work function only haven been given the frequency?
by duenezjuleny1D
Sat Dec 08, 2018 7:20 pm
Forum: Properties of Light
Topic: limiting reagents
Replies: 4
Views: 356

limiting reagents

how can we determine which reactant is the limiting reagent/determine percent yield?
by duenezjuleny1D
Thu Nov 29, 2018 4:44 pm
Forum: Hybridization
Topic: identifying hybridization of a central atom
Replies: 4
Views: 90

identifying hybridization of a central atom

while identifying the molecular geometry of a molecule how do you identify if it is non-polar or polar?
by duenezjuleny1D
Thu Nov 29, 2018 4:41 pm
Forum: Naming
Topic: How to name
Replies: 6
Views: 181

How to name

when naming how do you begin/what goes first and how do you know?
by duenezjuleny1D
Sun Nov 18, 2018 11:08 pm
Forum: Ionic & Covalent Bonds
Topic: Determining the Difference between Ionic and Covalent Bonds
Replies: 6
Views: 168

Re: Determining the Difference between Ionic and Covalent Bonds

it is easy to remember if you know/understand the relationships between ionization energy, electronegativity, and electron affinity. if the electronegativity difference between two atoms is greater than 2, then the bond is an ionic bond. if the electronegativity difference between two atoms is less ...
by duenezjuleny1D
Sun Nov 18, 2018 11:02 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Bond Angles for H2O
Replies: 8
Views: 832

Re: Bond Angles for H2O

it is because of the lone pair electrons they will repel each other and change the angels
by duenezjuleny1D
Sun Nov 18, 2018 10:59 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Bond Angles Between the Same shape
Replies: 6
Views: 113

Re: Bond Angles Between the Same shape

if the shapes are identical then there should be no difference in the angles :)
by duenezjuleny1D
Sun Nov 18, 2018 10:57 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Sigma/Pi bonds
Replies: 7
Views: 135

Re: Sigma/Pi bonds

Sigma bonds are consisted of two orbitals each with one electron, overlap end-to-end with each other. They also allow bound atoms to freely rotate. Pi bonds consist of two orbitals, each with one electron, overlap side-by-side with each other. Pi bonds do not allow bound atoms to rotate. It also mat...
by duenezjuleny1D
Sun Nov 18, 2018 10:46 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: lone pairs
Replies: 11
Views: 175

Re: lone pairs

yes, you will not be expected to know the exact values as lone pairs do change the angle value but it is sufficient to say so or just state if it would for example be less than 180 or less than 109.5
by duenezjuleny1D
Sun Nov 18, 2018 10:36 pm
Forum: Dipole Moments
Topic: Difference between dipole and london forces?
Replies: 5
Views: 129

Re: Difference between dipole and london forces?

London forces (known as Vander Waals) are weaker forms of dipole dipole forces. They are usually forces with unequal amounts of electrons shared between two atoms. While London forces occur when a positively charged nucleus of an atom attracts the electron cloud of another atom.
by duenezjuleny1D
Fri Nov 16, 2018 1:14 am
Forum: Determining Molecular Shape (VSEPR)
Topic: CH 4- 4.1 HW Prob.
Replies: 2
Views: 37

CH 4- 4.1 HW Prob.

How is it that some shapes can have lone pairs and others must have lone pairs? For example in problem 4.1 (6th edition) there are ball-and-stick models of two molecules, it asks to indicate whether there MUST be, MAY be, or CANNOT be one or more lone pairs of electrons on the central atom. How exac...
by duenezjuleny1D
Fri Nov 16, 2018 12:53 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Vsepr Formula
Replies: 7
Views: 82

Re: Vsepr Formula

The VSEPR Theory is basically a prediction of the molecular structure/geometry of a model based off of the number of electron lone pairs and attached atoms of molecules it is more 3D while Lewis structures are 2D.
by duenezjuleny1D
Wed Nov 14, 2018 4:39 pm
Forum: Resonance Structures
Topic: Formal Charge
Replies: 13
Views: 459

Re: Formal Charge

Ideally, you would like all of your ions to have a formal charge/overall charge of 0 but you will always be looking for the most stable structure possible!
by duenezjuleny1D
Wed Nov 14, 2018 4:33 pm
Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
Topic: Polar v. Non Polar
Replies: 7
Views: 209

Polar v. Non Polar

How do you identify whether or not something is polar or non polar? what does it depend on?

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