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138 Chemistry: Matter and Change
Solving Problems: A Chemistry Handbook
SOLVING PROBLEMS:
A CHEMISTRY HANDBOOK
CHAPTER 13
25. Ammonium nitrate decomposes when heated to produce dinitrogen monoxide and water.
NH 4 NO 3 (s) 0 N 2 O(g) ϩ 2H 2 O(l)
If 12.2 g of NH 4 NO 3 reacts, what volume of NO, measured at
98.5 kPa and 14°C, is produced?
26. Carbon disulfide burns in air to produce carbon dioxide gas and
sulfur dioxide gas.
CS 2 (l) ϩ 3O 2 (g) 0 CO 2 (g) ϩ 2SO 2 (g)
Determine the mass of CS 2 required to produce 15.7 L of SO 2
gas at 25°C and 99.4 kPa. (Hint: This problem is the reverse of
Example Problem 14-7. Start by calculating the moles of SO 2
present.)
27. When potassium chlorate is heated, it decomposes to produce
potassium chloride and oxygen gas. Write a balanced equation
for this reaction, and calculate the mass of potassium chlorate
needed to produce 5.00 ϫ 10 2 mL of oxygen gas at 1.108 atm
and 39°C.
Chapter 13 Review
28. Describe the spacing of the particles of an ideal gas and the
nature of the collisions of these particles.
29. Why does the pressure of a gas increase when the gas is
squeezed into a smaller volume?
30. A sample of gas is squeezed until its pressure triples. How is
the volume of the gas changed by the squeezing?
31. A sample of gas is heated until its Kelvin temperature doubles.
How is the sample’s volume changed by the heating?
32. How many moles of gas are there in 1000.0 L of nitrogen gas
measured at STP?
33. In the reaction N 2 (g) ϩ 3H 2 (g) 0 2NH 3 (g), what volume of
ammonia is formed when 360 mL of H 2 gas reacts? Assume
that both gases are at STP.