(I)
1.
2.
3.
Choose the best answer of multiple choices.
One mole of H2:----How many moles of methane (CH4) would you have in XXX g of methane?
How many grams of H2O could be formed by the reaction of XXX g of CH4 with YYY g of O2?
CH4 + 2O2
CO2 + 2H2O
4. What are the coefficients when the following chemical equation is properly balanced using the smallest
set of whole numbers?
5.
In the chemical equation: 2 Al2O3 (s) ---> 4 Al (l) + 3 O2 (g)
Calculate the mass of aluminum oxide reacted if XXX g of Al was produced and the percent yield was found
to be YYY%.
6. A water solution of which of the following will conduct an electric current?
7. Which of the following aqueous solutions contain the greatest number of ions?
8. A mixture of neon, argon, and xenon had a total pressure of XXX mmHg at 298 K. The mixture was
found to contain AA mol Ne, BB mol Ar, and CC mol Xe. What is the partial pressure of Xe?
9. Which of the following is not a characteristic of substances in the gas phase?
10. How many grams of carbon dioxide are contained in XXX mL of this gas at STP?
11. A gas sample has a volume of XXXL when the temperature is 28 oC and the pressure is 1.00 atm.
What will be the new volume of the gas when the temperature is changed to 0.0 oC and the pressure
to 850 torr?
(12,13) The decomposition of nitroglycerin (C3H5N3O9) can be expressed as the following:
4C3H5N3O9  6 N2 + 12 CO2 +10 H2O +O2
12. What is the maximum oxygen can be obtained from XXX gram of nitroglycerin?
13. Calculate the percent yield of the reaction if oxygen generated is found to be YYY g.
14. Which of the following gases has the highest density at the same pressure and temperature?
15. Aqueous solutions of barium chloride and silver nitrate are mixed. The net ionic equation contains
which of the following terms?
(II) Answer the following questions and show your work to earn credits.
1.
Calculate the percent composition by mass of ??? in glucose C6H12O6. Express your
answer in 3 significant digits.
2.
XXX mL of YYY M NaOH is needed to neutralize ZZZ mL of acetic acid solution. What is
the molarity of this acetic acid solution?
3.
Calculate the volume occupied by XXXg of methane (CH4) at YYYoC and ZZZ atm.
4.
Calculate the percent yield of iron if XXX g of Fe3O4 underwent the reaction shown in
the chemical equation below and YYY g of Fe was isolated from the reaction mixture.
Fe3O4 (s) + 2 C(s) ----> 2 CO2 (g) + 3 Fe(s)
5.
What volume of water must be added to XXX mL of YYY M HCl to dilute the solution to
ZZZ M?
6. What volume of oxygen can be collected at XXX oC andYYYtorr from the complete
reaction of ZZZ g of KClO3, according to the chemical equation shown below?
2 KClO3(s) ----> 2 KCl(s) + 3 O2(g)