Wildcard
Structures
Formulas/Compounds
Reactions
Math Time
100
How many pi bonds in this molecule:
There are 2
100
When Adam writes geometry and shape in an exam question, what is he asking for?
The electron geometry and molecular shape of a compound
100
What is the difference between ionic and covalent naming conventions?
Ionic uses roman numerals, covalent uses prefixes
100
When the change in pKa is POSITIVE, the reaction is (unfavorable/favorable).
Favorable
100
How do you find the limiting reactant in an equation?
(mol, reactant)/(coefficients)
200
Which of these is a
pi
orbital?
Parallel overlapping (green) bond
200
Why do the angles of a structure change depending on molecular shape or electron geometry?
The electronegative force of the lone pairs and bonds repel each other, with lone pairs having a stronger force in molecular shape.
200
What elements participate in hydrogen bonding?
F, O, N
(because hydrogen is always on the phone, but FON)
200
The following reaction has reached equilibrium, what changes would "push" the equilibrium to the left?
Add AB, remove A, or remove B
200
How many grams of sulfuric acid can be formed with 1.5 moles HCN and 2.2 moles CuSO4?
2HCN + CuSO4 = H2SO4 + Cu(CN)2
73.56 g
300
How many sigma and pi bonds are in this given molecule:
5 sigma, 2 pi
300
What is the geometry and shape around this nitrogen:
shape: bent
geometry: trigonal planar
300
What is the formula of nitric acid?
HNO3
300
Write the correct equilibrium expression for the following acid/base reaction:
300
What is the theoretical yield in moles of potassium phosphate when you have 25g sodium phosphate and 32g potassium hydroxide?
Na3PO4 + 3 KOH = 3 NaOH + K3PO4
0.152 moles
400
Which of these is a correct representation of a sigma bond between s orbitals? The pi bond between p orbitals?
Top left, bottom left
400
What is the correct structural formula for CH3CH2CONHCH3?
The third one down (where oxygen is double bonded with two lone pairs and nitrogen has one lone pair)
400
What is the name of H2SO4?
Sulfuric acid
400
Which is the correct arrow-pushing mechanism for the following acid/base reaction:
B (see the electrons are getting dumped into H2O)
400
Given the balanced chemical reaction, how many grams of carbon monoxide are needed to form 65.2 g of carbon dioxide, assuming I2O5 is in excess?
I2O5 + 5CO = I2 + 5CO2
65.2 g CO2 x (1 mol CO2 / 44.01 g CO2) x (5 mol CO / 5 mol CO2) x (28.01g CO / 1 mol CO) = 41.5
500
What atom, possessing a 2- ionic charge, would have an isoelectronic configuration with Argon (Ar)?
S2-, or sulfide
500
Draw the correct Lewis structure for CH3CN
500
Which of the following is a covalent compound:
a) CaCO3b) NaOH
c) MgSO4
d) C6H12O6
D! Glucose
500
Which is the correct arrow-pushing mechanism for the following acid/base reaction:
B!
500
In a titration experiment, it is found that it takes 55 mL of 0.33 M KOH to reach the endpoint of 22 mL of a sample of H2SO4. What is the concentration of H2SO4 (aq)?
KOH (aq) + H2SO4 (aq) = K2SO4 + H2O
equation is NOT balanced
.055 mL KOH x (0.33 mol NaOH / 1 L sol'n) x (1 mol H2SO4 / 2 mol KOH) = 9.1 mmol (0.0091 mol) H2SO4
M = mol / L or mol / mL
M = 9.1 mmol / 22 mL = 0.41 M H2SO4