1. Choose one compound and determine the empirical formula from the percentages by mass. Show all your work and explain each step for the edification of your classmates. See Example 6.6 on page 315 in your textbook. You might also find this video, Another Mass Composition Problem, helpful. 2. Determine the molecular formula from the information given about the total molecular mass. 3. Using the bit of unique information included with your substance, identify your substance, describe what it is, and why it may be in the sample it was isolated from. Give its systematic IUPAC name and common name. 4. Research the toxicity (LD50) of this substance and calculate the concentration of a solution, in molarity (if they drank 1 liter of it), and one other concentration unit [mass/mass (g/g) or mass/volume (g/ml) percentage, ppm or ppb] that would be toxic to a 85 kg person. Assume the density of a solution of your substance is the same as that of water. 5. In 3-4 sentences, discuss whether you think your compound could be responsible for the persons demise.
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