Enter your Name:   Enter your E-mail Address:  01a. Define Saturated fat 01b. Define Physical change 01c. Define Model 01d. Define Isomers 02. A student reports on an atom that has 11 protons, 10 neutrons, and 10 electrons. What is wrong with the student's report? 03. Two atoms have the same number of neutrons but different numbers of protons. Do they belong to the same element? 04. The element sulfur is comprised of all atoms which have 16 protons. How many neutrons are in sulfur-34? 05. How many total atoms are in one molecule of C22H44O? 06a. Identify the following as an atom, element, or molecule: P 06b. Identify the following as an atom, element, or molecule: N2 06c. Identify the following as an atom, element, or molecule: oxygen-16 06d. Identify the following as an atom, element, or molecule: PH3 07. When you boil water, are you causing a chemical change or a physical change? 08. Two solutions of different solute concentration are separated by a membrane. After 1 hour, the solutions are of equal concentrations and the water levels are the same as when the experiment started. Is this an example of diffusion or osmosis? 09. In the following equation: C3H8 + 5O2 ? ---> 3CO2 + 4H2O Is CO2 a product or a reactant? How many molecules of it are involved in the reaction? 10. What four things are necessary for photosynthesis? 11. If the following molecule is a carbohydrate, what is the value of x? C7HxO2 12. If you perform hydrolysis on a disaccharide, what kind of molecules will you get? 13. The pH of three solutions is measured. Solution A has a pH of 1.5; the pH of solution B is 7.1 and solution C has a pH of 13.2. Which solution or solutions is or are acidic? 14. Which of the following is an unsaturated fatty acid molecule? 15. What determines the properties of a protein? 16. What part of the nucleotide is responsible for the way DNA stores its information? 17. What holds the two helixes in DNA together?