BEFORE YOU DO ANYTHING ELSE: PUT YOUR NAME ON THIS EXAM AND ON THE APPENDICES PACKET!
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1 Last Name Date First Name Section M W CHEM 0 EXAM PART 2 You can print out the Appendices Packet from the Website. You ll get a copy of it for the Exam. Good strategy: scan the entire test before starting to give you an idea of how much time you might need. Start on the most time-intensive problems first. If you do nothing but this Practice Exam, you will be underprepared for the Exam. THIS IS THE ONLY PRACTICE EXAM THAT YOU WILL BE GETTING. Max Time = 43 min. (If you use the full 20 min on Part, you will only have 40 min for Part 2). Before beginning this practice exam, I highly recommend that you do the practice worksheets, available online. You should have all of the Practice Homework assignments complete by now. Putting ALL of the possible information into a 60-minute practice exam is impossible Therefore, you really should reread the Review Topics Packet and all of the Review Sheets. GENERAL DIRECTIONS: Calculators are allowed You may use information from Appendices Packet Remember the rules for showing work; I will not always remind you. Remember to circle your final answers. Forcing me to guess may lead to penalties. The last page has scratch paper attached. If you need more scratch paper, raise your hand and ask your instructor. There are extra credit questions. However, you must finish Part 2 of the Exam and hand it in before you can have them. BEFORE YOU DO ANYTHING ELSE: PUT YOUR NAME ON THIS EXAM AND ON THE APPENDICES PACKET! Page of 7
2 Part 2: Questions PART 2, SECTION : ADDITION/SUBTRACTION WITH SIGNIFICANT FIGURES You may use your calculators. (3 pts/each; Question 24 is worth 4 points) Max Time 6 min total 22) cm cm cm cm Answer: x0.9 cmx 23) 2, kg 03,070 kg 08, kg 08,970 kg Answer: x8970 kgx or x kgx 24) m m m m Answer: m x mx PART 2, SECTION 2: UNIT CONVERSIONS You can only use the metric unit equations exactly as they appear in the appendices. You may use any of the memorized unit equations at any time. 25) Convert centimeters to inches. (0 pt). Max Time: 6 min cm ( in ) = x9.843 inx 2.54 cm cm ( in ) = x9.843 inx 2.54 cm pt initial value pt correct conversion factor pt numerically correct pt units pt units pt correct sigdigs pt num/denom correct pt num/denom correct pt answer includes units pt units match work Page 2 of 7
3 26) Convert nanometers to kilometers. (3 pt). Max Time: 6 min ( nm 0-9 m nm km 000 m ) = x500. kmx or x km x ( nm 0-9 m nm km 000 m ) = x500. km x or x km x pt initial value pt correct conversion factor pt correct conversion factor pt numerically correct pt units pt units pt units pt correct sigdigs pt num/denom correct pt num/denom correct pt num/denom correct pt answer includes units pt units match work 27) Convert 37.0 miles per gallon to kilometers per liter. (3 pt). Max Time: 6 min 37.0 mi ( gal.6093 km mi gal ) = x5.7 km/lx L 37.0 mi ( gal.6093 km mi gal ) = x5.7 km/lx L pt initial value pt correct conversion factor pt correct conversion factor pt numerically correct pt units pt units pt units pt correct sigdigs pt num/denom correct pt num/denom correct pt num/denom correct pt answer includes units * You could have also used pt units match work mi = km Page 3 of 7
4 28) light year ( ly) is equal to 9.46 petameters (Pm). Derive the conversion factor between cubic light years and cubic petameters. (5 pt). Max Time: 3 min ly = 9.46 Pm pt: correct raw conversion factor ( ly) 3 = (9.46 Pm) 3 pt: set up show cubing of both sides of the eqn x ly 3 = 846 Pm 3 x 3 pt: cube both the numbers and units on both sides. Sigdigs: minimum same number of sigdigs as the raw conversion factor Sigdigs: maximum just don t give me more than 5 sigdigs 29a) A small business produce 0. kilograms of cookie dough (CD) per hour. Write the conversion factor that can be obtained from this information (4 pt). Max Time: min 0. kg CD = hr 29b) Calculate the mass of cookie dough (in pounds) that can be produced in.50 days. Treat the conversion factor from 29a like a measured value. information. (6 pt). Max Time: 8 min (.50 d 0.00 kg CD hr 24 hr d lb CD kg CD ) = x790 lb CDx or x lb CD x (.50 d 0.00 kg CD hr 24 hr d lb CD kg CD ) = x790 lb CDx or x lb CD x pt initial value pt correct conversion factor pt correct conversion factor pt correct conversion factor pt numerically correct pt units pt units pt units pt units pt correct sigdigs pt num/denom correct pt num/denom correct pt num/denom correct pt num/denom correct pt answer includes units pt units match work Page 4 of 7
5 30) An empty beaker is found to have a mass of grams. When 250. ml of a liquid is added, the beaker has a mass of grams. Determine the density of the liquid (in g/ml). Show all work, especially initial equations. (3 pts). Max Time: 7 min Logic: Density is equal to mass divided by volume. Therefore, I must determine the mass of the liquid and the volume of the liquid. VOLUME volume = 250. ml (given in the problem) MASS mass of liquid = mass final mass initial mass of liquid = g g = 97.3 g You don t have to write this equation (4 pt) This work must be shown. DENSITY d = m V ( pt) The variables-only density equation must be written d = 97.3 g 250. ml (4 pt) Plug in variables with units. (Volume was given) pt Numerically correct xd = g/mlx (4 pt) pt Correct sigdigs pt Answer includes units pt Units must match work General Note About Overall Part (of this practice exam): 084 pts Part 2 (of this practice exam): 092 pts Overall Points on the Practice Exam: 76 pts (92 points missed) ( ) There are no retake exams. However, you can replace the lowest exam score with the Final Exam Score. Page 5 of 7
6 All that stands between the life of this kitten and the Sith Lord is Your Honor. Please write your initials in the box below to verify that you have abided by the Honor Code on this Exam. YOU ARE FINISHED WITH PART 2 OF EXAM Turn in the following: Part 2 (with your name) Appendix Packet (with your name) If you are doing the extra credit Turn in Part 2 (with your name), keep the Appendix Packet, and get Extra Credit from instructor Once you have finished the extra credit, turn it and the Appendix Packet in to your instructor. Make sure your name is on both. Page 6 of 7
7 Last Name Date First Name SECTION M W Scratch Paper You can use this sheet as scratch paper. If you tear it off, please remember to turn it in even if you don t use it. Make sure your name is on this page if you separate this page from the rest of the test. Page 7 of 7
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