syedibrahim (as78977) – CH2 DIMENSIONAL ANALYSIS – cambre – (PAPCHEM2015C) 1This print-out should have 33 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 10.0 points A typical silicon chip such as those in digital watches and calculators weighs approximately 2.3 × 10−4 g. How many chips could be made from 1.0 kg of silicon? 3. 8.7 × 102 4. 0.087 005 10.0 points Round 0.046171 to three significant figures. 1. 0.0462 2. 4.615 × 10−2 1. 2.15 × 106 chips 3. 0.0461 2. 1.08 × 106 chips 4. 0.046 3. 8.6 × 106 chips 4. 4.3 × 106 chips 006 10.0 points Express 4592.3 to two (2) significant figures. 1. 4.59 × 102 002 10.0 points What is 45,500,000,000 in scientific notation? 2. 4.5 × 103 1. 4.55 × 1010 3. 4.592 × 103 2. 455. × 107 4. 4.6 × 103 3. 455. × 10−7 007 10.0 points Express 1.09 kcal in J. 4. 4.55 × 10−10 1. 4560. J 003 10.0 points What is 0.00875 in scientific notation? 2. 1090 J 1. 8.75 × 103 3. 4.56 J 2. 8.75 × 10−3 4. 4560 J 3. 8.8 × 10−3 4. 0.0875 × 101 008 10.0 points The area of a square with 50 cm sides is 1. 2.5 × 104 mm2 . 004 10.0 points Keeping in mind the rules for significant digits, find 0.00147 × 8.314 × 7.100. 1. 8.68 × 10 2. 2.5 × 10−1 m2 . 3. 2.5 × 102 cm2 . −2 2. 8.677 × 10 4. 2.5 m2 . −2 009 10.0 points The density of gold is 19. 015 10. joules? (1 calorie = 4. 012 10.1 cm × 81. 31.1 cal 4.5628 g? 1.83480 g 019 10.0 points What is the density of a sample of ore that has a mass of 90 g and occupies 25.0 points What is the zero point on the absolute scale defined as? 1.0 points Assume that all chickens have 1991 feathers. 013 10.0 points How many grams are there in 720 µg? Answer in units of g.272 g and 0. 3. Answer in units of mL.syedibrahim (as78977) – CH2 DIMENSIONAL ANALYSIS – cambre – (PAPCHEM2015C) 2 How many calories is 130. the temperature at which water freezes and ice melts 3.1 seconds to pluck 77.0 points Find the volume of a sample of wood that has a mass of 84 g and a density of 0. 3. 230 K.0 points How many kilometers are there in 4.8 g 3. 3. 014 10. 021 10.522 L.0 points Calculate the number of mL in 0. 4 g 5.0 points What is the density of a piece of metal that has a mass of 6.8348 g 2.83 g 4. 43 K.18 joules) 1. Answer in units of cm3 . Answer in units of g.0 points What is the sum of 3.857 g/cm3 .0 points What is the density of a block of marble that occupies 319 cm3 and has a mass of 855 g? Answer in units of g/cm3 . 016 10. how many hours would it take you to defeather 1351 chickens? .1 × 107 cm? Answer in units of km.4 cm3 ? Answer in units of g/cm3 .3 g/cm3 .29 × 105 g and is 96.0 points On the Kelvin scale. 3.835 g 6. 018 10. 2. 020 10. 3.11 cal 3. the temperature at which molecular motion ceases 5.7 cm? Answer in units of g/cm3 .3 cal 010 10. the equivalent to 0◦ C 011 10. a temperature of 43◦ C is 1. the temperature at which water boils 4. 543 cal 2. 316 K. 4. 273 K. 3. If it takes you 9.4 cm × 49.878 cm3 . 017 10. 54.0 points Calculate the mass of a sample of gold that occupies 0. 3. the equivalent to 0◦ F 2.6 feathers. 023 10.6 g/mL 6.00 × 10−3 kg 027 10. 1.3 g/mL 3. What is the density of the metal? Answer in units of g/mL.0 points A solid has a mass of 90 grams. A graduated cylinder contains 25 mL of water.77 × 104 4.0 × 109 .77 × 10−4 024 Given the graph Number of satisfied customers 4. 677 × 10 −3 5.0 × 106 2.0 points How many mg are in 1.00677 in scientific notation? 025 10. Company A has 2% more satisfied customers than Company B.0 points 026 10.1 g/mL 2. Company A has twice the number of satisfied customers as Company B. 1. 2. tomers than Company A. 677 × 10 3 4. 5.00 × 10−7 kg B A which of the following statements is true? 1.77 × 103 3. 1. What is the density of the solid? 1. 6.77 × 10−2 2.0 points What is the number 0. 1.6 mL of water. 1.0 points How many kg are in 10.19 g/mL 5. 6.syedibrahim (as78977) – CH2 DIMENSIONAL ANALYSIS – cambre – (PAPCHEM2015C) 3 Answer in units of hours. 2. 1. Company B has twice the number of satisfied customers as Company A. 6.0 points A metal cube having a mass of 72. 6. 022 10. 1. 530 g/mL 10.0 kg? 1.00 × 10−6 kg 3. This causes the water level to rise to 46. More than one answer is true. 1. 0.00 × 10−5 kg 50 4. Company B has 2% more satisfied cus- 5. 6. 6.00 × 10−4 kg 51 2.8 mL.5 g is dropped into a graduated cylinder that contains 29.77 × 10−3 5.3 g/mL 7. 1. the new water level reads 42 mL. 3. When the solid is completely submerged in the water. 3.0 mg? 1. 0. 3.0 points 0. 1. 44 × 103 6. 0.67 × 10−5 msec 2. 3.67 × 10−6 msec 3. 5.0367 seconds is equal to how many milliseconds? 1. freeze a substance.44 × 101 4.0 points Write 0. 0. but offset by 273◦ . 233 K 032 10.4 × 10−2 7. 6.67 msec 1.665 3. 26◦ C since they are both the same scale.0367 msec 2. 44 × 10−3 4. 2.0 × 103 1. 3.7 msec 3.65 1. What is its temperature measured in Kelvin? 4.0 × 10−3 031 10.5 033 10.syedibrahim (as78977) – CH2 DIMENSIONAL ANALYSIS – cambre – (PAPCHEM2015C) 4 3. 299 K since they are the same scale.4 × 10 2 2. 0. 66. 36. 25 K 4.0 × 10−6 2. 298 K 6. 4. 029 10.0 points Heat capacity is a measure of the heat required to 4. 4. evaporate a substance. 2. expand the volume of a substance.0665 030 10.0 points At room temperature a beaker of liquid measures 26◦ C. 44 K 028 10. None of these 3. −247 K 3.044 in scientific notation.65 × 10−1 to decimal form 3. 1. 5. . It is not possible to convert from ◦ C to K.0 × 10−9 4. 1. 1.0 points What is −40◦ C in K? 5. None of these 1.0 points Convert 6. 789 K 5. 4. change the temperature of a substance. 1.44 × 10−1 5. 0.