Name ____________________ CHEM 1004 Homework #4 Spring 2011 Buckley This homework is due on Tuesday, February 1, at class time. The assignment will be accepted up until the start of class on Wednesday, February 2, with a 20% penalty. Assignments turned in after class that day will receive no credit, though I will look through them if you want me to. 1. (2 points) a. What law is illustrated by the following set of compounds? N2O NO NO2 N2O4 N2O5 b. Who is responsible for formulating this law? 2. (2 points) Hydrogen is being looked at as a potential energy source for the future. Water consists of 2.0 parts by mass of hydrogen and 16.0 parts by mass of oxygen. How many pounds of water would have to be decomposed to obtain one ton (2000 lb.) of hydrogen? 3. (4 points) A substance is thought to be a pure compound. Three samples are analyzed for nitrogen and oxygen with the results given in the table. Could the material be a compound? Explain your reasoning. Sample # 1 2 3 Mass of sample 1.000 g 14.30 g 3.71 g Mass of nitrogen 0.237 g 3.39 g 0.879 g Mass of oxygen 0.763 10.91 g 2.83 g ←←←←←PLEASE TURN THE PAGE OVER→→→→→ 4. (4 points) An alternative health practitioner claims that a nuclear power plant releases radiation at a level so low that it cannot be measured but that is harmful to the thyroid gland. He sells a thyroid extract that he claims can fix the problem. Use one or more of the FLaReS principles to evaluate this claim and its potential for being true.