2. What is the molar mass of SrCl2.6H2O? Include the correct units in your answer. Atomic weights: Sr 87.6, Cl 35.5, H 1.01, O 16.0.
3. How many moles of oxygen are required to react with 12.0 grams of carbon to produce carbon monoxide? Atomic weights: C 12.0, O 16.0. The balanced equation is
2 C + O2 --> 2 CO
4. How many moles of NaOH are required to react with the SO2 produced by the oxidation of 0.500 moles of FeS2? The balanced equations are
5. A compound of sulfur and fluorine contains 29.7% S and 70.3% F (percentages are by mass). What is the empirical formula of the compound?4 FeS2 + 11 O2 --> 2 Fe2O3 + 8 SO2SO2 + 2 NaOH --> Na2SO3 + H2O
6. (a) How many grams of AlCl3 can be produced when 0.100 moles of aluminum reacts with excess chlorine? Atomic weights: Al 27.0, Cl 35.5. The balanced equation is
7. What is the molarity of a copper(II) chloride solution if 10.0 grams of CuCl2 are dissolved in water to give 250.0 mL of solution? The molar mass of CuCl2 is 134.5 g/mol.(b) What is the % yield of this reaction if 12.5 grams of AlCl3 are actually obtained?2 Al + 3 Cl2 --> 2 AlCl3
8. What is the molarity of a sodium hydroxide solution if 50.0 mL of
the solution requires 38.6 mL of 0.0976 M HCl for titration?
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Last revised: May 2 2001 by M. F. Richardson
© Brock University, 2001