Supplemental Instruction
Iowa State University / Leader: / Erin Johnson
Course: / Chem 163
Instructor: / Windus/Bonaccorsi
Date: / 10/24/11
1. The atomic mass of potassium is
a) 39.1 amu
b) 39.1 g
c) 31.0 amu
d) 31.0 g
2. The molar mass of calcium nitrate, Ca(NO3)2 is
a) 164.1 amu
b) 164.1 g
c) 102.1 amu
d) 102.1 g
3. How many molecules of CO2 are there in 1.5 moles of CO2?
a) 44
b) 66
c) 9.03 x 10^23
d) 6.022 x 10^23
4. How many moles of oxygen atoms are there in one mole of CO2 ?
a) 1
b) 2
c) 16
d) 32
5. Which of the three phases of matter features particles in a fixed, rigid arrangement?
a) solid
b) liquid
c) gas
d) all of the above
6. Which of the following compounds exhibit hydrogen bonding?
a) NH3
b) HF
c) H2O
d) all of the above
7. Circle all of the molecules listed below that are polar
a) NH3 b) CH3F
c) CCl4 d) AlH3
8. Sodium metal reacts with chlorine gas to form solid sodium chloride. Write the balanced
chemical equation with the correct reactants and products (including all phases).
9. An aqueous solution of nitric acid reacts with an aqueous solution of potassium hydroxide. Write the balanced chemical equation with the correct reactants and products (including all phases).
10. An aqueous solution of lead(II) nitrate, Pb(NO3)2, is mixed with an aqueous solution of sodium sulfate, Na2SO4.
a) Predict the products based on the solubility rules table and write the balanced equation with intact compounds. Show all phases.
b) Write the balanced complete ionic equations for the reaction above (show all species present). Show all phases.
c) Identify the spectator ions for the reaction above:
d) Write the balanced net ionic equation for the reaction above. Show all phases.
11. Water solid has lower density than water liquid (in fact ice floats in your glass of soda). Briefly explain what is the main reason for this fact.
12. Consider the photosynthesis of glucose from carbon dioxide and water.
6 CO2 + 6 H2O ---à C6H12O6 + 6 O2
What is the theoretical yield (maximum amount) of glucose if 355 g of carbon dioxide react completely with the sufficient amount of water? Molar masses: CO2 = 44.0 g/mol, C6H12O6 = 180.12 g/mol.
13. Fill in the blanks in the following table
Avogadro’s number: 6.022 x 10^23