Chapters 1-3
How many significant figures are in the measurement of a small sample of powder weighing in at 0.003970g?
4
How many liters of gas correspond to one mole of an ideal gas at STP?
22.4 L/mol
Roughly, what region (in terms of wavelength) of the electromagnetic spectrum corresponds to visible light?
400nm-700nm
What is the relationship between intermolecular forces and vapor pressure?
The stronger the intermolecular forces, the lower the vapor pressure.
What is today, but yesterday's tomorrow?
-Mr. Krabs
Today
Which group/family of the periodic table tend to have a +2 charge in their ionic form?
Alkaline Earth Metals
What sign on ∆H corresponds to what thermic process?
∆H = negative (exothermic)
∆H = positive (endothermic)
A steric number of 5 corresponds to what electronic geometry?
Trigonal Bipyramidal
How is the Van't Hoff factor (i) calculated?
(moles of ions in solution)/(moles of solute dissolved)
What does it snow on Venus?
- Something I saw
Metal
Give the name of the following compound:
P5O9
Pentaphosphorus Nonoxide
Assuming other variables to be constant, how will the volume of a gas scale if the pressure were tripled? Give an exact scalar.
the volume of the gas would be 1/3 of the original. Look at P1V1 = P2V2
Which of the following compounds is the most polar?
NH3, PH3, AsH3, SbH3, BiH3
NH3
follow electronegativity trend
Which of the following compounds would you most appropriately call hydrophobic?
CH4, H2CO, CO, HCl, NaCl
Ion-dipole > H-Bonding > Dipole-Dipole >Dipole-induced dipole > London Dispersion
This thing all things devours:
Birds, beasts, trees, flowers;
Gnaws iron, bites steel;
Grinds hard stones to meal;
Slays king, ruins town,
And beats high mountain down.
-G
Time
Identify the set of stoichiometric coefficients that satisfies the following combustion reaction:
C8H18 + O2 ---> CO2 + H2O
1, 12.5, 8, 9
or
2, 25, 16, 18
Name off at least 4 strong bases
LiOH (Lithium Hydroxide)
There are 6 total:
NaOH (Sodium Hydroxide)
KOH (Potassium Hydroxide)
Ca(OH)2 (Calcium Hydroxide)
Sr(OH)2 (Strontium Hydroxide)
Ba(OH)2 (Barium Hydroxide)
What is the molecular (not electronic) geometry and hybridization of the CIF4+ molecule?
see-saw (saw-horse)
dsp3
List, in order of decreasing strength, the 5 intermolecular forces.
Ion-dipole > H-Bonding > Dipole-Dipole >Dipole-induced dipole > London Dispersion
What weighs more: all the trains that pass through Grand Central Station in a day, or all the trees cut down in a year to print U.S. currency?
- Dalton Russel
They both weigh the same. That is, they both weigh nothing.
Trains don't pass through grand central station, they pass through grand central terminal.
U.S. currency isn't printed on paper, it is printed on cotton and linen.
What are the 6 transitional phases for matter?
Melting (solid to liquid)
Vaporization (liquid to gas)
Condensation (gas to liquid)
Freezing (liquid to solid)
Sublimation (solid to gas)
Deposition (gas to solid)
Name off the 7 strong acids
HCl (Hydrochloric Acid)
HBr (Hydrobromic Acid)
HI (Hydroiodic Acid)
HNO3 (Nitric Acid)
H2SO4 (Sulfuric Acid)
HClO3 (Chloric Acid)
HClO4 (Perchloric Acid)
What are the 4 quantum numbers and their possible range of values?
principal QN: n (1, 2, 3...)
Angular momentum QN: l (0, 1, 2..., n-1)
Magnetic QN: ml (-l...0...l)
Spin: ms (-1/2, +1/2)
Explain (in the context of the molecular level) why the effects on boiling point and freezing point of a substance due to intermolecular forces are so.
Strong intermolecular forces keep the molecules more tightly packed together, making them harder to pull apart at the molecular level and more readily to be tightly packed. Thus stronger intermolecular forces result in higher boiling points and higher freezing points.
This is opposite follows for weaker intermolecular forces.
In the dark they arrive without being fetched; In the light, they are lost without being stolen.
- source unknown
The stars.