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)
→
