random things my TA says
lab
periodic trends
electron config
enthalpy
100
Keep it to.....
one page
100
what is this calculation?
(actual/theoretical) * 100%
percent yield
100
which of the following has the same trend on the periodic table?
atomic size
electron affinity
ionization energy
ionization energy and electron affinity
100
what is the ground state electron config of Ar?
1s2 2s2 2p6 3s2 3p6
100
what is the difference between qsoln and qrxn
the sign
200
bakers work in grams....
chemist work in moles
200
what type of structure is not shown?
skeleton structure
200
which element has a larger atomic size?
Li and Ca
Ca
200
what noble gas would you use to write the short hand electron config of Ti?
Ar
200
if you have 50.0g of 1M HCl with a density identical to water, how many moles do you have?
0.05 mol
300
NaOH is commonly used as...
liquid drano
300
Approximately 80% of organic reactions involve a step called “reflux”. What does it mean to “reflux” an organic mixture?
Reflux is a process in which a solvent is used to keep substances dissolved and at a constant temperature by boiling the solvent, condensing it, and returning it to the flask.
300
which has the highest IE2 ?
Na, Mg, Al
Na
300
how many valence electrons does Sn have?
4
300
if delta T is negative is the reaction endo or exo?
endo
400
My cat is the...
love of my life
400
Mass of 2 cups + stir bar=8.27 Mass of 2 cups + stir bar + reactant 1=12.4 Mass of water=100 Mass of 2 cups + stir bar + both reactants=112.4
What is the mass of reaction?
104.13
400
what is the periodic trend of metallic behavior?
decreases from left to right, and increases down a group
400
fill in the blanks
periods are...... groups are....
across rows.....down columns
400
Deterioration of buildings, bridges and other structures as a result of rusting of iron (Fe) costs millions of dollars every day. Although the actual process also requires water, a simplified equation (with rust shown as Fe2O3) is:
4Fe(s) + 3O2(g) → 2Fe2O3(s) ΔHrxn = ‒1.65 x 103 kJ
What is ΔHrxn (in kJ) when 0.250 kg of iron (Fe) rusts?
‒1.85 x 103 kJ
500
Read the introduction on your own because
that is boring
500
Hydrogen cyanide (HCN) is produced industrially from the reaction of gaseous ammonia (NH3), oxygen, and methane (CH4). If 5.00 x 106 g each of NH3, O2, and CH4 are reacted, which species is the limiting reactant?
2NH3(g) + 3O2(g) + 2CH4(g) → 2HCN(g) + 6H2O(g)
O2
500
what is the meaning of isoelectronic?
having the same number of and configuration of electrons as another species
500
what is the electron config of Cu? (short hand)
[Ar] 3d10 4s1
500
A student in lab added 4.029 g of solid CaCl2·2 H2O to 49.03 g of deionized water at 20.77 °C in a coffee cup calorimeter. The maximum temperature measured in the calorimeter after the addition of the solid was 26.20 °C. Calculate ΔH (in kJ/mol) for the dissolution of CaCl2·2 H2O. Assume that the solution has the same specific heat capacity as water.
‒44.0 kJ/mol