CHEMISTRY COMMUNITY

juliaschreib1A

My TA said up to 4 regions which would be sp3

juliaschreib1A

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...

juliaschreib1A

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.

juliaschreib1A

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.

juliaschreib1A

You cannot know unless given actual information about the element or using the periodic trend.

juliaschreib1A

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.

juliaschreib1A

There are 7 orbitals. In these 7 orbitals, 14 electrons can occupy these orbitals because 2 can fit in each.

juliaschreib1A

Light is made up of photons (photons of light) and these photons move in waves.

juliaschreib1A

This equation is used for estimating the pH of a buffer solution.

juliaschreib1A

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.

juliaschreib1A

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...

juliaschreib1A

Based on the given information, whether the products are increasing or decreasing, you should be able to deduce whether x is + or -.

juliaschreib1A

The shorter the bond, the stronger it is. Triple bonds are the shortest and single bonds are the longest.

juliaschreib1A

The exceptions are H, He, Li, Be, S, and F

juliaschreib1A

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)

juliaschreib1A

As electronegativity increases, does ionic or covalent character increase? What is the reasoning for this?

juliaschreib1A

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...

juliaschreib1A

Because Hydrogen forms bonds with non metals does it therefore only form covalent bonds?

juliaschreib1A

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.

juliaschreib1A

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...

juliaschreib1A

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?

juliaschreib1A

Does anyone know an easier way to balance chemical equations? How do you know when and how to use fractions?

juliaschreib1A

Why do photons not have mass?? doesn't every existing thing have mass?

juliaschreib1A

Just divide by a common denominator to get the empirical formula.

juliaschreib1A

Do they have to give you the actual yield to calculate the percent theoretical yield?

juliaschreib1A

When I get stuck on balancing equations does anyone have any tips?

juliaschreib1A

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.

juliaschreib1A

To calculate formula units, you use 6.022 x 10^23.

juliaschreib1A

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

CHEMISTRY COMMUNITY

Search found 29 matches

Re: Hybrid Orbitals

Re: Sig fifs in 750 [ENDORSED]

Re: electronegativity chart

Re: transition metals

Re: Electroegativity

Re: Chemical equilibrium [ENDORSED]

Re: F orbital

Re: Wave and Particle

Re: When to use the Henderson-Hasselbalch Equation

Re: Difference between Bonds [ENDORSED]

Re: basics of hybridization

Re: ICE table question

Re: Bond Strength

Re: Octet Exception

Re: formal charge

Re: ionic and covalent character

Re: Octet rule

Re: Properties of Hydrogen

PV=nRT

Re: Mass percentage

Re: Schrodinger's Equation & Orbitals

Re: balancing chemical reactions

Re: De Brogile's equation [ENDORSED]

Re: Molecular to Empirical [ENDORSED]

Re: Theoretical Yield [ENDORSED]

Suggestions for Balancing Reactions

Re: Rusty on High School Chem [ENDORSED]

Re: Formula Units

Re: Molar Mass