Search found 29 matches

by juliaschreib1A
Sun Jun 10, 2018 11:03 pm
Forum: Hybridization
Topic: Hybrid Orbitals
Replies: 5
Views: 158

Re: Hybrid Orbitals

My TA said up to 4 regions which would be sp3
by juliaschreib1A
Sun Jun 10, 2018 10:59 pm
Forum: Significant Figures
Topic: Sig fifs in 750 [ENDORSED]
Replies: 6
Views: 290

Re: Sig fifs in 750 [ENDORSED]

A super easy way of counting sig figs is a quick trick I was taught in High School Chem. The Pacific and the Atlantic. You orient both oceans as if looking on a map. Then if a decimal is (P)resent then you start on the left side of the number and start counting with the first number larger than zero...
by juliaschreib1A
Sun Jun 10, 2018 10:53 pm
Forum: Electronegativity
Topic: electronegativity chart
Replies: 11
Views: 545

Re: electronegativity chart

It is definitely not necessary to memorize these numbers. It is more important to know the trends of electronegativity. A trick I use for memorizing trends is to know the element with the highest electronegativity and a line pointing in that direction is the general trend.
by juliaschreib1A
Sun Jun 03, 2018 10:58 pm
Forum: Coordinate Covalent Bonds
Topic: transition metals
Replies: 3
Views: 342

Re: transition metals

It gets a little foggy in the transition metals unlike the rest of the elements. You can learn information by looking at the element that it is bonded to and how many there are of that element in relation to the transition metal.
by juliaschreib1A
Sun Jun 03, 2018 10:54 pm
Forum: Electronegativity
Topic: Electroegativity
Replies: 9
Views: 374

Re: Electroegativity

You cannot know unless given actual information about the element or using the periodic trend.
by juliaschreib1A
Sun Jun 03, 2018 10:53 pm
Forum: Ideal Gases
Topic: Chemical equilibrium [ENDORSED]
Replies: 9
Views: 664

Re: Chemical equilibrium [ENDORSED]

The reaction can only be favored in the reverse reaction if something were to happen to the equation. For example if products or reactants were taken away or increased.
by juliaschreib1A
Sun Jun 03, 2018 10:49 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: F orbital
Replies: 6
Views: 220

Re: F orbital

There are 7 orbitals. In these 7 orbitals, 14 electrons can occupy these orbitals because 2 can fit in each.
by juliaschreib1A
Sun Jun 03, 2018 10:47 pm
Forum: Properties of Light
Topic: Wave and Particle
Replies: 10
Views: 261

Re: Wave and Particle

Light is made up of photons (photons of light) and these photons move in waves.
by juliaschreib1A
Sun Jun 03, 2018 10:44 pm
Forum: *Making Buffers & Calculating Buffer pH (Henderson-Hasselbalch Equation)
Topic: When to use the Henderson-Hasselbalch Equation
Replies: 4
Views: 797

Re: When to use the Henderson-Hasselbalch Equation

This equation is used for estimating the pH of a buffer solution.
by juliaschreib1A
Sun Jun 03, 2018 10:39 pm
Forum: Sigma & Pi Bonds
Topic: Difference between Bonds [ENDORSED]
Replies: 7
Views: 383

Re: Difference between Bonds [ENDORSED]

Sigma is always the first bond and then followed by pi bonds. For example, a triple bond is made up of a sigma bond and 2 pi bonds.
by juliaschreib1A
Sun Jun 03, 2018 10:34 pm
Forum: Hybridization
Topic: basics of hybridization
Replies: 18
Views: 412

Re: basics of hybridization

1. Draw the lewis structure of an atom. 2. Count the number of lone pairs. 3. Count the number of bond (a double bond and a triple bond count as 1 bond in this case). 4. Add up #2 and #3 and that gives you a number. 5. The number found in #4 corresponds to hybridization. For example, 2=SP, 3=SP^2, 4...
by juliaschreib1A
Sun Jun 03, 2018 10:25 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: ICE table question
Replies: 5
Views: 1315

Re: ICE table question

Based on the given information, whether the products are increasing or decreasing, you should be able to deduce whether x is + or -.
by juliaschreib1A
Sun May 27, 2018 6:30 pm
Forum: Bond Lengths & Energies
Topic: Bond Strength
Replies: 5
Views: 204

Re: Bond Strength

The shorter the bond, the stronger it is. Triple bonds are the shortest and single bonds are the longest.
by juliaschreib1A
Sun May 27, 2018 6:29 pm
Forum: Octet Exceptions
Topic: Octet Exception
Replies: 7
Views: 226

Re: Octet Exception

The exceptions are H, He, Li, Be, S, and F
by juliaschreib1A
Sun May 27, 2018 6:28 pm
Forum: Formal Charge and Oxidation Numbers
Topic: formal charge
Replies: 11
Views: 277

Re: formal charge

It is a lot easier to calculate formal charge as
FC= (The # of valence electrons the element comes with) - (The number of bonds/dots the electron has now)
by juliaschreib1A
Sun May 27, 2018 6:26 pm
Forum: Ionic & Covalent Bonds
Topic: ionic and covalent character
Replies: 7
Views: 144

Re: ionic and covalent character

As electronegativity increases, does ionic or covalent character increase? What is the reasoning for this?
by juliaschreib1A
Sun May 20, 2018 10:45 pm
Forum: Ionic & Covalent Bonds
Topic: Octet rule
Replies: 17
Views: 331

Re: Octet rule

The octet rule is when atoms are most stable with a full set of electrons (8). There are many exceptions to this rule that simply just need to be memorized. Therefore, when drawing lewis dot diagrams most times, each element needs to find it's most stable state with 8 electrons each, either shared o...
by juliaschreib1A
Sun May 20, 2018 10:42 pm
Forum: Ionic & Covalent Bonds
Topic: Properties of Hydrogen
Replies: 3
Views: 63

Re: Properties of Hydrogen

Because Hydrogen forms bonds with non metals does it therefore only form covalent bonds?
by juliaschreib1A
Sun May 20, 2018 10:39 pm
Forum: Ideal Gases
Topic: PV=nRT
Replies: 3
Views: 192

PV=nRT

Hypothetically, when using PV=nRT, can you use it along with MV=MV? I know that sometimes you cannot use certain equations given their circumstances.
by juliaschreib1A
Sun May 06, 2018 10:37 pm
Forum: Molarity, Solutions, Dilutions
Topic: Mass percentage
Replies: 8
Views: 301

Re: Mass percentage

The mass percentages have to equal 100% because all the elements together must add up to the total molecule. However, you may be confused for the next step in solving an empirical formula problem, when we are asked to assume that the elements are part of a 100 gram sample. This simply just makes the...
by juliaschreib1A
Sun May 06, 2018 10:34 pm
Forum: *Shrodinger Equation
Topic: Schrodinger's Equation & Orbitals
Replies: 3
Views: 145

Re: Schrodinger's Equation & Orbitals

I am also confused about this equation. Do you think we will have to explain it conceptually/ can anyone explain the use of the equation?
by juliaschreib1A
Sun May 06, 2018 10:23 pm
Forum: Balancing Chemical Reactions
Topic: balancing chemical reactions
Replies: 6
Views: 234

Re: balancing chemical reactions

Does anyone know an easier way to balance chemical equations? How do you know when and how to use fractions?
by juliaschreib1A
Mon Apr 30, 2018 1:12 pm
Forum: DeBroglie Equation
Topic: De Brogile's equation [ENDORSED]
Replies: 4
Views: 153

Re: De Brogile's equation [ENDORSED]

Why do photons not have mass?? doesn't every existing thing have mass?
by juliaschreib1A
Sun Apr 15, 2018 11:51 am
Forum: Empirical & Molecular Formulas
Topic: Molecular to Empirical [ENDORSED]
Replies: 12
Views: 335

Re: Molecular to Empirical [ENDORSED]

Just divide by a common denominator to get the empirical formula.
by juliaschreib1A
Sun Apr 15, 2018 11:50 am
Forum: Limiting Reactant Calculations
Topic: Theoretical Yield [ENDORSED]
Replies: 6
Views: 203

Re: Theoretical Yield [ENDORSED]

Do they have to give you the actual yield to calculate the percent theoretical yield?
by juliaschreib1A
Sun Apr 15, 2018 11:49 am
Forum: Balancing Chemical Reactions
Topic: Suggestions for Balancing Reactions
Replies: 8
Views: 260

Suggestions for Balancing Reactions

When I get stuck on balancing equations does anyone have any tips?
by juliaschreib1A
Sun Apr 15, 2018 11:46 am
Forum: General Science Questions
Topic: Rusty on High School Chem [ENDORSED]
Replies: 113
Views: 33030

Re: Rusty on High School Chem [ENDORSED]

Make sure that you use units when you are doing stoichiometry. Keeping track of units will help you in the long run for your answer.
by juliaschreib1A
Sun Apr 15, 2018 11:36 am
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Formula Units
Replies: 6
Views: 284

Re: Formula Units

To calculate formula units, you use 6.022 x 10^23.
by juliaschreib1A
Sun Apr 15, 2018 11:35 am
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Molar Mass
Replies: 9
Views: 309

Re: Molar Mass

The correct units for molar mass is grams/mole, so you calculate the grams and that will be equal to one mole.

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