Search found 57 matches
- Sun Jan 17, 2021 10:59 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: C in ICE Box
- Replies: 11
- Views: 21
Re: C in ICE Box
The change in reactants is always negative while the change in products is always positive.
- Sun Jan 17, 2021 10:57 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Changes in K
- Replies: 4
- Views: 14
Re: Changes in K
Yes, temperature is the only thing that can change the value of K.
- Sun Jan 17, 2021 10:56 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Total pressure calculation
- Replies: 8
- Views: 23
Re: Total pressure calculation
You can calculate the total pressure by simply adding all of the partial pressure values.
- Sun Jan 17, 2021 10:53 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: What makes a weak acid?
- Replies: 11
- Views: 26
Re: What makes a weak acid?
It is probably recommended that you just remember what the strong and weak acids are.
- Sun Jan 17, 2021 10:52 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Reactants and Products
- Replies: 9
- Views: 29
Re: Reactants and Products
Yes, the reactants will always be on the left and the products will always be on the right.
- Sun Jan 17, 2021 10:50 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: ICE Box quadratic equation
- Replies: 10
- Views: 26
Re: ICE Box quadratic equation
When you are using the quadratic formula you can ignore the negative answer that you get back.
- Sun Nov 29, 2020 9:33 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: sigma vs pi bonds
- Replies: 33
- Views: 184
Re: sigma vs pi bonds
Typically, all single bonds have one sigma bond and all double bonds have one sigma bond and one pi bond. Also, a triple bond would have a one sigma bond and two pi bonds. So when you are counting the amount of sigma bonds in a molecule make sure to consider the sigma bonds present in double and tri...
- Sun Nov 29, 2020 9:29 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Polar
- Replies: 10
- Views: 67
Re: Polar
You should consider the electronegativity between the atoms in the molecule and whether the dipole moments created counteract each other or not.
- Sun Nov 29, 2020 9:26 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Sapling HW #17
- Replies: 7
- Views: 59
Re: Sapling HW #17
For this question make sure you take into consideration all the possible types of bonds that could used. You should also consider the arrangement you put the molecules in. Also make sure if there are any rings that you can form. Good Luck!
- Sun Nov 29, 2020 9:22 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Nonpolar bonds
- Replies: 7
- Views: 31
Re: Nonpolar bonds
An example of a non-polar molecule would O2 and it is non-polar because there are not any partial charges present.
- Sun Nov 29, 2020 9:18 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: How to determine negative poles? (Week 8 Sapling Q10)
- Replies: 9
- Views: 51
Re: How to determine negative poles? (Week 8 Sapling Q10)
From my understanding, the negative poles would be found towards the atom that is more electronegative.
- Sun Nov 15, 2020 9:58 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: VSEPR
- Replies: 11
- Views: 93
Re: VSEPR
Yes, I believe that it can help determine polarity because because VSPER helps determine the shape and structure of the molecule.
- Sun Nov 15, 2020 9:56 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Midterm #2
- Replies: 14
- Views: 102
Re: Midterm #2
For Midterm 2 we should expect to see any material after MT1 to the end of outline 3.
- Sun Nov 15, 2020 9:54 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: bond angles
- Replies: 16
- Views: 246
Re: bond angles
The bond angle will depend on the arrangement of electrons and molecular shape.
- Sun Nov 15, 2020 9:52 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Memorizing the Different Shapes
- Replies: 4
- Views: 36
Re: Memorizing the Different Shapes
I think it is safe to assume that we will have to know how to recognize the shapes and angles.
- Sun Nov 15, 2020 9:49 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Sapling #20
- Replies: 12
- Views: 92
Re: Sapling #20
There are not any hydrogen bonds because H is not bonded to anything that has a high electronegativity.
- Sun Oct 25, 2020 9:24 pm
- Forum: DeBroglie Equation
- Topic: Sapling Homework - electron affinity
- Replies: 9
- Views: 107
Re: Sapling Homework - electron affinity
yeah it seems like the length of the bacterium would be the same wavelengths of the photon.
- Sun Oct 25, 2020 9:20 pm
- Forum: DeBroglie Equation
- Topic: Frequency of an object with mass
- Replies: 3
- Views: 45
Re: Frequency of an object with mass
After finding the wavelength then you can use c= wavelength x frequency to find the frequency. All you would have to do is manipulate the formula and plug in what you have.
- Sun Oct 25, 2020 9:18 pm
- Forum: DeBroglie Equation
- Topic: Rearranging De Broglie Equation
- Replies: 17
- Views: 116
Re: Rearranging De Broglie Equation
(velocity)= h/(mass)(wavelength)
- Sun Oct 25, 2020 9:15 pm
- Forum: DeBroglie Equation
- Topic: Determining Energy of a Photon
- Replies: 5
- Views: 47
Re: Determining Energy of a Photon
Yeah, I believe you are supposed to use that as the wavelength.
- Sun Oct 25, 2020 9:14 pm
- Forum: DeBroglie Equation
- Topic: Derivation of Equations on Midterm?
- Replies: 17
- Views: 99
Re: Derivation of Equations on Midterm?
I dont think you need to worry about that since the questions on the midterm will be multiple choice.
- Sun Oct 11, 2020 5:31 pm
- Forum: Molarity, Solutions, Dilutions
- Topic: sapling hw #7
- Replies: 17
- Views: 165
Re: sapling hw #7
Thanks guys, these explanations were very helpful.
- Sun Oct 11, 2020 5:28 pm
- Forum: SI Units, Unit Conversions
- Topic: Rounding
- Replies: 20
- Views: 160
Re: Rounding
Normally you would want to wait until the final answer before you round.
- Sun Oct 11, 2020 5:26 pm
- Forum: SI Units, Unit Conversions
- Topic: SI Units
- Replies: 13
- Views: 125
Re: SI Units
Unless the questions states otherwise, I would go ahead and use the finals unit that you would end up with.
- Sun Oct 11, 2020 5:25 pm
- Forum: SI Units, Unit Conversions
- Topic: Temperature
- Replies: 14
- Views: 111
Re: Temperature
It seems like kelvin is the main one that we will be using in class but I would still be familiar with the other ones just in case.
- Sun Oct 11, 2020 5:23 pm
- Forum: SI Units, Unit Conversions
- Topic: Conversion Factors
- Replies: 6
- Views: 35
Re: Conversion Factors
I believe that we do not have to worry about remembering most conversion factors and that they will be given to us.
- Sun Dec 01, 2019 11:45 pm
- Forum: Naming
- Topic: Water in Coordination Compounds
- Replies: 7
- Views: 137
Re: Water in Coordination Compounds
It is to emphasize that the oxygen is what is bonded and not the hydrogen.
- Sun Dec 01, 2019 11:43 pm
- Forum: Naming
- Topic: Roman Numeral
- Replies: 13
- Views: 158
Re: Roman Numeral
The roman numeral is the charge of the metal in the compound.
Re: Oxidation
The oxidation number refers to the charge the molecule has.
- Sun Dec 01, 2019 11:35 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Determing Coordination Number
- Replies: 5
- Views: 57
Re: Determing Coordination Number
I think the coordination number is the number of bonds attached to the central ion.
- Sun Dec 01, 2019 11:30 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Polydentate
- Replies: 2
- Views: 56
Re: Polydentate
yes that is what it is.
- Sun Dec 01, 2019 11:25 pm
- Forum: Naming
- Topic: Order of Ligands
- Replies: 4
- Views: 64
Re: Order of Ligands
You should list them in alphabetical order based on the root.
- Sun Nov 24, 2019 11:43 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Cis vs Trans
- Replies: 22
- Views: 549
Re: Cis vs Trans
Cis molecules would be polar and trans molecules are nonpolar.
- Sun Nov 24, 2019 11:41 pm
- Forum: Naming
- Topic: Order in Naming
- Replies: 12
- Views: 155
Re: Order in Naming
You must put them in alphabetical order and then consider the charge.
- Sun Nov 24, 2019 11:34 pm
- Forum: Amphoteric Compounds
- Topic: Amphiprotic
- Replies: 11
- Views: 170
Re: Amphiprotic
An amphiprotic is a something that can both accept and donate a proton.
- Sun Nov 24, 2019 11:22 pm
- Forum: Properties & Structures of Inorganic & Organic Acids
- Topic: How to tell?
- Replies: 11
- Views: 494
Re: How to tell?
Acids will usually have h atoms.
- Sun Nov 24, 2019 11:17 pm
- Forum: Properties & Structures of Inorganic & Organic Acids
- Topic: Bronsted vs. Lewis Acids
- Replies: 9
- Views: 138
Re: Bronsted vs. Lewis Acids
One of the differences is that bronsted acids donate protons, however Lewis acids accept electrons.
- Sun Nov 17, 2019 8:03 pm
- Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
- Topic: Water molecules
- Replies: 9
- Views: 499
Re: Water molecules
Water molecules use both Hydrogen atoms to form a hydrogen bond.
- Sun Nov 17, 2019 7:59 pm
- Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
- Topic: types of bonds
- Replies: 14
- Views: 596
Re: types of bonds
A single bond would have 1 sigma bond, a double bond would have a sigma bond and a pi bond, and a triple bond would have a sigma bond and 2 bonds.
- Sun Nov 17, 2019 7:56 pm
- Forum: Hybridization
- Topic: Pi and Sigma Bonds
- Replies: 17
- Views: 556
Re: Pi and Sigma Bonds
The way that it works is that a single bond would have a sigma bond. A double bond would have a sigma bong and pi bond and a triple bond would have a sigma bond and two pi bonds.
- Sun Nov 17, 2019 7:52 pm
- Forum: Electronegativity
- Topic: Noble Gases
- Replies: 40
- Views: 1711
Re: Noble Gases
Noble gases have no electronegativity sincecthey already have a full octet
- Sun Nov 17, 2019 7:47 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Repulsion strength and Bond Angles
- Replies: 12
- Views: 161
Re: Repulsion strength and Bond Angles
Yes since the molecule with the lone pair would alter the degrees of the bond angles.
- Sun Oct 27, 2019 10:55 pm
- Forum: Bond Lengths & Energies
- Topic: H bonding
- Replies: 14
- Views: 753
Re: H bonding
The presence of hydrogen bonds increases the melting point.
- Sun Oct 27, 2019 10:52 pm
- Forum: Electronegativity
- Topic: Radius
- Replies: 13
- Views: 817
Re: Radius
As the electronegativity increases the atomic radius decreases.
- Sun Oct 27, 2019 10:35 pm
- Forum: Ionic & Covalent Bonds
- Topic: Homework
- Replies: 13
- Views: 235
Re: Homework
I recommend doing the homework on the chemical bonds section.
- Sun Oct 27, 2019 10:29 pm
- Forum: Ionic & Covalent Bonds
- Topic: Covalent Bonds
- Replies: 11
- Views: 147
Re: Covalent Bonds
Yes covalent bonds can only be formed by two non-metals.
- Sun Oct 27, 2019 10:27 pm
- Forum: Lewis Structures
- Topic: Choosing the central atom
- Replies: 16
- Views: 257
Re: Choosing the central atom
You choose the central atom by picking the atom that has the lowest ionization energy.
- Sun Oct 20, 2019 11:30 pm
- Forum: Trends in The Periodic Table
- Topic: ionization energy
- Replies: 11
- Views: 560
Re: ionization energy
Ionization energy is indeed the energy required to remove an electron from an atom.
- Sun Oct 20, 2019 11:29 pm
- Forum: Trends in The Periodic Table
- Topic: Atomic Radius
- Replies: 7
- Views: 145
Re: Atomic Radius
I believe that you find the atomic radius by measuring the distance between the nuclei of two touching atoms.
- Sun Oct 20, 2019 11:26 pm
- Forum: Photoelectric Effect
- Topic: Speed of Light
- Replies: 29
- Views: 380
Re: Speed of Light
Yes, it is a constant so it will always be the same.
- Sun Oct 20, 2019 11:25 pm
- Forum: Einstein Equation
- Topic: When do we use the Einstein Equation?
- Replies: 14
- Views: 442
Re: When do we use the Einstein Equation?
We would use the equation in order to find the energy of a photon. However, it does have other uses.
- Sun Oct 20, 2019 11:18 pm
- Forum: Properties of Light
- Topic: What are the units of hertz
- Replies: 41
- Views: 573
Re: What are the units of hertz
Hz is equivalent to 1 cycle/second.
- Sun Oct 06, 2019 11:32 pm
- Forum: SI Units, Unit Conversions
- Topic: Avogadro's Number
- Replies: 4
- Views: 104
Re: Avogadro's Number
Avogadro's number represents the number of atoms in per mol of a substance.
- Sun Oct 06, 2019 11:27 pm
- Forum: Limiting Reactant Calculations
- Topic: Calculating Theoretical Yield
- Replies: 9
- Views: 175
Re: Calculating Theoretical Yield
Most of the time the limiting reactant is given in the problem, but it can either be in moles or grams it just depends on the circumstance.
- Sun Oct 06, 2019 11:19 pm
- Forum: Balancing Chemical Reactions
- Topic: When are atoms lost or created?
- Replies: 14
- Views: 543
Re: When are atoms lost or created?
The law of conservation of mass states that atoms cannot be created or destroyed.
- Sun Oct 06, 2019 11:13 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Week 2 Homework Problems [ENDORSED]
- Replies: 67
- Views: 3636
Re: Week 2 Homework Problems [ENDORSED]
He specified to do either fundamentals or quantum world for homework 2.
- Sat Oct 05, 2019 11:21 pm
- Forum: Significant Figures
- Topic: All students read this sig fig post [ENDORSED]
- Replies: 133
- Views: 17947
Re: All students read this sig fig post [ENDORSED]
Should I take sig figs while I am calculating one problem step by step? Should I use sig figs every step or should I just consider the sig figs on the very last calculation? I believe that you should only use significant figures on the last calculation. It is also important to keep in mind that sig...