CHEM-121_Written Assignment 4 - Thomas Edison State College...

Thomas Edison State College
General Chemistry I with Labs (CHE-121)
Section no.: OL009
Semester and year: Feb2015
Written Assignment 4: Chemical Reactions
Answer all assigned questions and problems, and show all work.
1 Write the (a) balanced equation for the formation of liquid water from hydrogen and oxygen
gas, and use it to explain the following terms: (b) chemical reaction, (c) reactant, (d)
product. (12 points)
O
2
2 Balance the following equations: (18 points)
2
2
4
O
3 Calculate the mass in grams of iodine (I
2
) that will react completely with 20.4 g of
aluminum (Al) to form aluminum iodide (AlI
3
). (5 points)
4 The annual production of sulfur dioxide from burning coal and fossil fuels, auto exhaust,
and other sources is about 26 million tons. The equation for the reaction is
S(s) + O
2
(g) →