Basics
Stoichiometry
Bonding
Reactions
Miscellaneous
100
The measurement of this liquid in mL, according to chemistry approximation rules. (Use four significant figures).
What is "32.1" mL?
Anything from 32.10 to 32.20 is acceptable.
100
The mass in a 3.25-mole sample of NH4OH
A. 10.8 g
B. 34.0 g
C. 35.1 g
D. 114 g
What is 114 g?
100
Which of the following molecules has a nonpolar covalent bond?
A. H–Br
B. H–Cl
C. H–F
D. H–H
What is H-H?
100
13. The equation below represents an equilibrium reaction.
The chemical in the forward reaction that is a Brønsted-Lowry acid.
What is HNO3?
100
11. Which of the following elements has both metallic and nonmetallic properties?
A. Ar
B. Ge
C. Mg
D. S
What is Ge?
200
Hydrogen has three isotopes and a relative atomic mass of 1.0079. The isotope of most abundance:
A. Hydrogen with an isotope of 3.
B. Hydrogen with an isotope of 2.
C. Hydrogen with an isotope of 1.
What is "Hydrogen with an isotope of 1"?
200
0.1718 L of a 0.3556-M C3H7OH solution is diluted to a concentration of 0.1222 M.
The volume of the resulting solution (in 4 significant figures).
What is 0.500L?
200
If two covalently bonded atoms are identical, this type of bond is formed.
What is "nonpolar covalent"?
200
The coefficient of the carbon dioxide in this reaction.
CH3NH2 + O2 
CO2 + H2O + N2
What is 4?
200
4. What is the chemical formula for magnesium bromate?
(Be very careful with wording.)
What is Mg(BrO3)2?
300
2. Which statement correctly compares an atom of boron-11 and an atom of carbon-14?
A. An atom of boron-11 has one fewer proton and two fewer neutrons than an atom of carbon-14.
B. An atom of boron-11 has one fewer neutron and two fewer protons than an atom of carbon-14.
C. An atom of boron-11 has one fewer proton and three fewer neutrons than an atom of carbon-14.
D. An atom of boron-11 has one fewer neutron and three fewer protons than an atom of carbon-14.
What is "An atom of boron-11 has one fewer proton and two fewer neutrons than an atom of carbon-14"?
300
A compound is found to contain 63.52 % iron and 36.48% sulfur. The empirical formula of this formula.
What is FeS?
300
When H+ forms a bond with H2O to form the hydronium ion H3O+...
The reason this bond is called a coordinate covalent bond.
a. both bonding electrons come from the oxygen atom
b. it forms an especially strong bond
c. the electrons are equally shared
d. the oxygen no longer has eight valence electrons
What is "both bonding electrons come from the oxygen atom"?
300
The net ionic equation for this reaction with the states of matter listed:
HNO3(aq) + CsOH (aq) -> H2O (l) + CsNO3 (aq).
(Be very careful with wording, leniency possible.)
What is "H+(aq)+ OH- (aq) -> H2O (l)?"
300
The statement that explains why people spread salt on icy sidewalks in the winter.
A. The salt causes the ice to undergo sublimation.
B. The salt lowers the surface tension of melted ice.
C. The ice-salt mixture has a higher density than ice has.
D. The ice-salt mixture melts at a lower temperature than ice does.
What is "The ice-salt mixture melts at a lower temperature than ice does"?
400
The name for the compound CuSO4·5H2O.
What is "Copper(II) Sulfate Pentahydrate"?
400
Consider the following balanced reaction.
2 C8H18(l) + 25 O2(g) -> 16 CO2(g) + 18 H2O(g)
The grams of water produced when 382.9 liters of oxygen gas at STP fully react (in 4 significant figures).
What is 221.7 g?
400
The number of the correct Lewis Dot Structure for ethylene, C2H4.
(Pictures number one to four from TOP to BOTTOM).
What is D?
400
The statement that best describes electrolytic and nonelectrolyte solutions.
A. Electrolytic solutions include alcohols and sugars, while nonelectrolytes include acids and bases.
B. Electrolytic solutions produce ions in solution, while nonelectrolytes do not produce ions in solution.
C. Electrolytic solutions are not able to conduct electricity, while nonelectrolytes are able to conduct electricity.
D. Electrolytic solutions are composed of polar covalent substances, while nonelectrolytes are composed of ionic compounds.
What is "Electrolytic solutions produce ions in solution, while nonelectrolytes do not produce ions in solution"?
400
The substance with the highest number of molecules.
(a) 36 g of water
(b) 28 g of carbon monoxide
(c) 46 g of ethyl alcohol
(d) 54 g of nitrogen pentoxide
What is 36 g of water?
500
The elements Li, Fe, C, Ca from smallest to largest atomic radius.
What is C, Li, Fe, Ca?
500
Souring of wine occurs when ethanol is converted to acetic acid by oxygen by the following reaction: C2H5OH + O2 CH3COOH + H2O. A 1.00 L bottle of wine, labeled as 8.5% (by volume) ethanol, is found to have a defective seal. Analysis of 1.00 mL showed that there were 0.0274 grams of acetic acid in that 1.00 mL. The density of ethanol is 0.816 g/mL and the density of water is 1.00 g/mL.
The percent yield for the conversion of ethanol to acetic acid if O2 is in excess (in 3 significant figures).
What is 30.3%?
500
(a) The structure in this diagram.
(b) The reason for why it is able to conduct electricity (chance of leniency with answer).
(a) What is metallic?
(b) What is "there are free electrons that are able to move through the structure"?
500
The number of electrons needed to balance each of the following half-reactions.
Reduction half-reaction: Sn2+ + __ e− → Sn
Oxidation half-reaction: Co → Co2+ + __ e−
Overall reaction: Sn2+ + Co → Sn + Co2+
What is 2?
500
For water (m.p. 0oC, b.p. 100oC)
Heat of fusion = 333 J/g @ 0oC
Heat of vaporization = 2260 J/g @ 100oC
Specific Heat (solid) = 2.09 J/goC
Specific Heat (liquid) = 4.18 J/goC
Specific Heat (gas) = 2.03 J/goC
The amount of heat (in kJ) that must be absorbed to convert 108 g of ice at 0oC to water at 70oC.
(a) 77 kJ
(b) 68 kJ
(c) 64 kJ
(d) 57 kJ
(e) 50 kJ
What is 68 kJ?