CHEM 1040 Study Guide - Midterm Guide: Barium Fluoride, Phosphorus Trichloride, Sulfur
Ch. 2 Study Questions
• Analysis of a sample of kaolinite shows that 14.35 g of kaolinite contains 8.009 g of
oxygen. What is the mass percent of oxygen in the sample?
o 1.792 mass %
o 24.80 mass %
o 30.81 mass %
o 34.12 mass %
o 55.81 mass %
• Which pair of substances could be used to illustrate the law of multiple proportions?
o SO2, H2SO4
o SO, SO2
o H2O, O2
o CH4, C6H12O6
o NaCl, KCl
• What is the mass ratio of copper to iodine in the white compound? 1.27 g copper +3.50
g iodine → 3.81 g white compound + 0.96 g Iodine
o 0.333 g Cu/g I
o 0.363 g Cu/g I
o 0.500 g Cu/g I
o 1.32 g Cu/g I
o None of these
• What is the mas ratio of copper to iodine in the white compound? 2.55 g copper +3.50 g
iodine→ 5.25 white compound +.80 g copper
o 0.333 g Cu/g
o 0.486 g Cu/g I
o 0.500 g Cu/g I
o 0.729 g Cu/g I
• Which mass laws are demonstrated? A. Mass Conservation B. Definite Composition C.
Multiple Proportions
o A
o A, C
o B
o A, B
o B, C
o C
o A, B, C
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