wildcard
stoichiometry
redox
structures/shape
math
100
Categorize these 4 compounds into covalent and ionic compounds.
a) NaCl
b) CH4
c) H2O
d) KOH
Categorize these 4 compounds into covalent and ionic compounds.
a) NaCl
b) CH4
c) H2O
d) KOH
100
Balance the following equation:
AgI +Na2S ----> Ag2S + NaI
2AgI +Na2S ----> Ag2S + 2NaI
100
Define what 'redox' is.
I use OILRIG.
Oxidation is loss, reduction is gain (of electrons).
100
How many sigma bonds are in a single, double, and triple bond? How many pi?
1: One sigma, no pi
2: One sigma, one pi
3: One sigma, two pi
100
What is the equation to calculate percent yield?
BONUS: Could you manipulate it to find actual yield?
Percent yield = (actual yield)/(theoretical yield) x 100
actual yield = (percent yield/100) x theoretical yield
200
What is the name of KNO3?
Potassium nitrate
200
Write the balanced equation of:
CuCl2 + NaNO3 --> Cu(NO3)2 + NaCl
CuCl2 + 2NaNO3 --> Cu(NO3)2 + 2NaCl
200
Determine the oxidation number of Zinc in the ion Zn(OH)42-
Zn: +2
200
What is the electron geometry of NH3? The molecular geometry?
Tetrahedral electron geometry and a trigonal pyramidal molecular geometry
200
When a question gives the amount of a product that is formed in a chemical reaction, is this the theoretical or actual yield?
The actual yield
300
What are the roman numerals in a chemical name?
The change in the metal cation, or the oxidation state!
300
Balance the following equation:
C3H8+O2→CO2 + H2O
C3H8+5O2→3CO2 + 4H2O
300
Determine the oxidation number of each element in the compound Cr2O72-
O: -2
Cr: +6
300
Identify the number of sigma and pi bonds:
7 sigma, 1 pi
300
A reaction with a·calculated yield of 9.23 g produced 7.89 g of product. What is the percent yield for
this reaction?
85.5%
400
What is the formula for Iron(III) chloride?
FeCl3
400
Determine the number of moles of carbon dioxide formed when 2.50 mol ethanol (C2H6O) undergoes combustion in excess oxygen.
C2H6O(l) +3O2(g) ----> 2CO2(g) + 3H2O(l)
5 mol
400
Determine which element is reduced and which is oxidized in the following reaction:
MnO2 (s) + 4HCl(aq.) → MnCl2 (aq.) + Cl2 (g) + 2H2O(l)
Oxidized: Cl
Reduced: Mn
400
Identify the number of sigma and pi bonds in this drawing:
6 sigma, 3 pi
400
How many moles are in 3.4 x 1023 molecules of O2?
3.4 x 1023 x (1 mol / 6.022 x 1023 molecules) = 0.56 moles
500
Where are the polar covalent bonds in the following image: 
The red oxygens denote where the polar covalent bonds are.
500
What is the oxidation number of Sulfur in Na2SO4?
-6
500
Determine which species are the reducing and oxidizing agents in the following reaction:
3PbO(s) + 2NH3 (g) → N2 (g) + 3H2O(l) + 3Pb(s)
Oxidizing agent: PbO (lead II oxide), Reducing agent: NH3 (ammonia)
500
Draw out the correct Lewis structure for acetic acid (CH3COOH)
500
What is the mass of 8.00 moles of aluminum? (Use the periodic table to find the molar mass)
216 g Al