Naming
What is the name of FeSO4 x 7H20?
iron(II)sulfate heptahydrate
True or False?
Robert Millikan's oil drop experiment determined the fundamental charge of the electron.
True
Which of these statements are true regarding atomic radii?
a) O3- > Al3
b) Se > Se 2-
c) Sr > Br
a, c
Calculate the mass of 5.40 x 10^16 atoms of Bismuth in micrograms.
18.7
Is density an intensive or extensive property?
intensive
What is the formula for hypobromous acid?
HBrO
Validate these quantum numbers:
n=5, l=3, ml=-3, ms=+1/2
They are valid
How would I rank the following C-O bonds in order of increasing bond length?
CO3 2-, CH3OH, CH2O, CO
CO< CH2O< CO3 2-< CH3OH
Give the net ionic equation that occurs when aqueous solutions of K2S and Fe(NO3) 2 are mixed.
Fe2+(aq) + S2-(aq)- -> FeS(s)
Write out the electron configuration of Cu
What makes an acid or base strong? Name your strong acids and bases.
HI, HCl, HBr, HNO3, H2SO4, HClO4
Which of the following are paramagnetic?
Mg, Ti, Ti2+, Sn4+
Ti, Ti 2+
What are the molecular geometries of:
NF3 and PF5
trigonal pyramidal, trigonal bipyramidal
Balance a combustion reaction between C8H18 and O2 (produces carbon dioxide and water)
2, 25, 16, 18
A compound is 52.14% C, 13.13% H, and 34.73% O by mass. What is the empirical formula of the compound?
C2H6O
What volume of 0.155M nitric acid is needed to neutralize 1.89g of calcium hydroxide?
329 mL
Calculate the deBroglie wavelength of a single H2 molecule traveling 2150 m/s. Give your answer in picometers using 3 significant figures. (Hint: deBroglie wavelength= h/mv)
92.1 pm
Draw all possible resonance structures for CN-. Which is the most viable?
triple bond with a negative charge on the carbon
What mass of excess reagent is remaining after 76.8g O2 reacts with 82.1g Al according to this reaction: 3O2 + 4Al -> 2Al2O3
3.77g
Gallium has 2 naturally occurring isotopes: Ga-69 (68.92558 amu) and Ga-71 (70.92470 amu). Find the mass of Ga-71 in a 4.500g sample of naturally occurring gallium. Give your answer to 3 significant figures (Hint: You'll need your periodic table)
1.74 g
Name the following compound:
Sr(IO4)2
Strontium Periodate
When light with a wavelength of 363 nm strikes copper, the ejected electrons have 38.0 kJ/mol of kinetic energy. What is the threshold frequency for copper? (Hint: KE=Ephoton- binding energy; binding energy= h x threshold frequency)
7.31 x 10^14 Hz
What are the shapes of s,p, and d orbitals? Draw them on your marker boards
sphere, dumbell, clover
What volume of 0.156M Na3PO4 solution is necessary to completely react with 90.7 mL of 0.118M CuCl2? (Hint: Balance a double displacement reaction between these two compounds)
45.7 mL
A 1.80 kg sample of iron initially at 94.0 degrees celsius is dropped into a 405 mL beaker of water inititally at 14.5 degrees celsius. The iron and water come to thermal equilibrium, assuming no loss of heat, what is the final temperature? The specific heat capacities of iron and water are 0.450 and 4.18 J/ g degrees celsius respectively. The density of water is 1g/mL.
40.2 degrees celsius