CHEMISTRY COMMUNITY

Josh Moy 1H

because you need energy for the reaction to happen

Josh Moy 1H

It's a unique reaction rate because its the same for all concentrations of reactants and products when multiplied by their stoichiometric coefficient.

Josh Moy 1H

will naming be on the final?

Josh Moy 1H

Order reactions are determined by how the rate changes in respect to concentration

Josh Moy 1H

temperature has no relevance for these problems

Josh Moy 1H

If the other reactant's concentrations remain constant then yes it would be first order

Josh Moy 1H

A proper first order graph is just a straight decreasing line?

Josh Moy 1H

Order reveals how the concentrations of reactants relate to the rate

Josh Moy 1H

Unit of K is in a format so that the rate becomes mol/L S

Josh Moy 1H

What did the basic DJ say?

Drop the base!!!

Josh Moy 1H

Did you gain an electron because I’m starting to feel some charge

Josh Moy 1H

These are some funny jokes!!

Josh Moy 1H

if you aren't part of the solution you're part of the precipitate

Josh Moy 1H

dont trust an atom. Why? they make up everything

Josh Moy 1H

how do you order the cell diagram aside from anode is left and cathode is right

Josh Moy 1H

If the compound has a negative delta G value then it's stable

Josh Moy 1H

For 9.75, my calculator can't calculate using Botlzmann's because it overflows...what would i do on the exam?

Josh Moy 1H

What is the logic behind the solution to this problem?

Josh Moy 1H

you can increase energy via:
1. Add or subtract matter
2. Add or subtract heat
3. do work on it

Josh Moy 1H

Heat is contained in the isolated system so it changes within itself. The only thing that cant be changed is volume because its constant

Josh Moy 1H

If a flask turns cold its endothermic because it absorbs heat

Josh Moy 1H

You wont be asked a problem with all three of those being unknown because its not possible to calculate one without the other 2

Josh Moy 1H

Cp of ideal gases is 5/2(R) and Cv is 3/2(R)

Josh Moy 1H

sign of entropy depends on flow of heat

Josh Moy 1H

for an exo reaction delta H is always negative implying the release of heat (thus the reaction is warmer)

Josh Moy 1H

yep sig figs will depend on the smallst enthalpy value i.e 322KJ is 3 SF

Josh Moy 1H

For part c does the h20 (1) have a different formation enthalpy because when i calculate evreything my value is off

Josh Moy 1H

The negative signifies a loss in energy

Josh Moy 1H

will all the equations be on a formula sheet?

Josh Moy 1H

An electron went on a date, it was electric

Josh Moy 1H

isolated systems are in fixed quantities with no interaction with its outside environment i.e thermos

Josh Moy 1H

with the lid on a fish tank is a closed system

Josh Moy 1H

I feel like this formula sheet will include heat capacities etc

Josh Moy 1H

What do you call a tooth in a glass of water?

A molar solution

*ba dum tss

Josh Moy 1H

Why can't atoms be trusted?

Because they make up everything

Josh Moy 1H

What kind of dogs do chemists have?

Laboratory retrievers

Josh Moy 1H

Dipole occurs in a covalently bonded atom, usually when the lewis structure is not symmetric (unequal charges)

Josh Moy 1H

usually yes it's a liquid or aqueous solution

Josh Moy 1H

How do you determine the proper prefixes for ligands

Josh Moy 1H

how do you name coordination compounds?

Josh Moy 1H

if a TM doesn't form 6 bonds how many bonds would it usually form?

Josh Moy 1H

the roman numeral represents the charge of the transition metal

Josh Moy 1H

Ionic bonds are btween a metal and non metal, and a covalent bond is between two non metals

Josh Moy 1H

Will we get marked off if our shapes our different? say the compound is NCl3, would we get marked off if we had it in the shape of _l_ instead of a mercedes logo type shape?

Josh Moy 1H

Atomic radius is half the distance between the center of two atoms. ionic radius is the distance between 2 ions.

Josh Moy 1H

What is the difference between ionization energy and electron affinity?

Josh Moy 1H

It's because of the less shielding

Josh Moy 1H

for atomic radius, if an element is lower on the periodic table but closer to the right side, would it be bigger or smaller than an element higher on the periodic table thats on the left side

Josh Moy 1H

Use when you have mass and velocity and need wavelength

Josh Moy 1H

because joules is per kilogram

Josh Moy 1H

In the textbook 3.29x10^15 is the number used to represent Rydberg, so I would use that value.

Josh Moy 1H

Use planck's constant whenever you need to use/derive equations involving the variable h

Josh Moy 1H

For question 27, it wants moles of photons, and i found energy to be 4.7x10^-19 J/photon, but when converting to just photons the solution Manual turns the 4.7x10^-19 into photons/J to cancel out jules with the 64J. Why did they do this

Josh Moy 1H

If we have kg or km should we convert to g and m?

Josh Moy 1H

Did anyone understand question 13? What is the Rydberg formula?

Josh Moy 1H

Is Velocity (m/s) the same as speed?

Josh Moy 1H

yes all values incorporated into your calculations count for sig figs

Josh Moy 1H

Has anyone completed fundamentals part M question 19? I can't seem to get the correct answer

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