7. 8. 9. 10. 11. 13. What is the term for a horizontal row in the periodic table that contains elements with properties that vary from metallic to nonmetallic? 14. a. b. c. d. a. b. Which is most likely when rapidly mixing strong acids and bases? Nothing unusual will happen. c. d. a. b. C. d. Which of the following are reasons why your laboratory instructor would ask you to leave the laboratory? C. d. group and family group and series In the event of a massive chemical spill in the laboratory; what action should you take? Immediately exit the laboratory and summon help. a. b. Calmly sit down at your lab bench and wait for help to arrive. Get your laboratory partner to help you clean up the mess. Find your instructor and ask what to do next. period and group period and series A chemical suddenly causes massive irritation to your eyes. Your first response should be to An explosion or near-explosion with noxious fumes. The mixture will instantly become solid. The mixture will have a beautiful color and a pleasant odor a. do nothing You are attentive while receiving instructions or display inappropriate behavior. You are prepared to perform the planned laboratory exercise. You are appropriately dressed for the laboratory environment. You are disruptive while receiving important instructions. b. tell your laboratory partner a. b. C. leave the laboratory and go home 12. Which of the following is an acceptable practice in a chemical laboratory? Wearing long, loose hair, flip-flops, and baggy clothing. Working alone, without supervision, and on an unauthorized experiment. Eating your lunch and smoking while doing your experiment. Observing safety laboratory procedures at all times. C. d. d. immediately wash your eyes with lots of running water then get help from your laboratory instructor a. b. C. d. Which is a risky practice in the chemical laboratory? Wearing a protective lab coat and using eye protection. Operating an open flame near an open ether container. Keeping a contemporary and accurate lab notebook on all lab experiments. Working in a wide-open space. What is the general term for a substance dissolved in water? a. acid salt 15. 18. b. C. d. The compound CH3CH2NH2 is classified as a a. primary amine b. secondary amine C. d. 16. Given the following information, what is the percent of water in an unknown hydrate? Mass of beaker and hydrate 96.620 g Mass of beaker 95.063 g Mass of beaker + anhydrous compound 95.975 g a. PROP C. d. b. d. a. b. b. C. d. aqueous salt aqueous solution salt solution 17. What kinds of interactions is NOT part of tertiary protein structure? salt bridges C. d. tertiary amine alkaloid 2.41 % 14.7% 40% 70.7% As the number of moles per liter of a reactant in a chemical reaction increases, the number of collisions between the reacting particles disulfide bonds hydrophilic interactions peptide bonds decreases increases remains constant undetermined, since more information is needed 19. What is the actual yield of a sodium carbonate given the following date? Mass of the test tube = 18.2000g Mass of the test tube + NaHCO, (before heating) = 19.715 g Mass of the test tube + NaCO3 (after heating) = 19.202 g a. 0.489 g b. 0.513 g 1.002 g 1.515 g 20. Natural gas is composed mainly of butane octane methane propane a. b. C. d.