Search found 57 matches

by Abraham De Luna
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.
by Abraham De Luna
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.
by Abraham De Luna
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.
by Abraham De Luna
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.
by Abraham De Luna
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.
by Abraham De Luna
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.
by Abraham De Luna
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...
by Abraham De Luna
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.
by Abraham De Luna
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!
by Abraham De Luna
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.
by Abraham De Luna
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.
by Abraham De Luna
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.
by Abraham De Luna
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.
by Abraham De Luna
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.
by Abraham De Luna
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.
by Abraham De Luna
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.
by Abraham De Luna
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.
by Abraham De Luna
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.
by Abraham De Luna
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)
by Abraham De Luna
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.
by Abraham De Luna
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.
by Abraham De Luna
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.
by Abraham De Luna
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.
by Abraham De Luna
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.
by Abraham De Luna
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.
by Abraham De Luna
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.
by Abraham De Luna
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.
by Abraham De Luna
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.
by Abraham De Luna
Sun Dec 01, 2019 11:40 pm
Forum: Naming
Topic: Oxidation
Replies: 14
Views: 236

Re: Oxidation

The oxidation number refers to the charge the molecule has.
by Abraham De Luna
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.
by Abraham De Luna
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.
by Abraham De Luna
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.
by Abraham De Luna
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.
by Abraham De Luna
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.
by Abraham De Luna
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.
by Abraham De Luna
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.
by Abraham De Luna
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.
by Abraham De Luna
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.
by Abraham De Luna
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.
by Abraham De Luna
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.
by Abraham De Luna
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
by Abraham De Luna
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.
by Abraham De Luna
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.
by Abraham De Luna
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.
by Abraham De Luna
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.
by Abraham De Luna
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.
by Abraham De Luna
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.
by Abraham De Luna
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.
by Abraham De Luna
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.
by Abraham De Luna
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.
by Abraham De Luna
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.
by Abraham De Luna
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.
by Abraham De Luna
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.
by Abraham De Luna
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.
by Abraham De Luna
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.
by Abraham De Luna
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.
by Abraham De Luna
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...

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