Solved Exam 1 for Introductory General Chemistry I with lab | CHEM 1010, Exams of Chemistry

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CHEM 1010 EXAMI 9-19-11 NAME Multiple Choice. Write the CAPITAL LETTER of the best response in the blank provided to the left. 2 points each. 2.1. Which of these does not describe the subject of chemistry? (A) pizza burns easily if the oven temperature exceeds 475°F (B) L love pizza (C) pizza is a heterogeneous mixture (D) mozzarella cheese melts at 335°F &) pizza dough expands by 15-22% as it rises (A) 1000mm = (B)1x10%km = (C) 10 dm (D) 100cm ~—— (B) alll of these are the same lm Lo GOO | {)__ 3. Which of these molecules wo fl be classified as both hetereatomic and triatomic? (A) 95 (B) CO, (C).CHy @D).O; (E) NH, | | 2 Which value differs from the others? 4. How many significant figures are in the value 6.030 x 10°? (A) four (B) five (C) six (@) three (E) nine | C 2 5, Evaluate the following and express the answer in Scientific Notation (46x10 (2.3x10) = ? 14 8 (74x10 (9.4.x 10°) eG (A13x10% (B)15x107 (C)15x107 = (D)13x10° = (B) 0.15 x 108 <6. The high temperature in Murfreesboro on Sept 14 was 86°F. To the nearest whole degree, what is this expressed in Celsius and Kelvin? (A) 139°C & 412K (B) 123°C & 396 K (C) 187°C & 460 K (D) 68°C & 341K (BE) 30°C & 303 K . { ) 7. What is the density of sulfuric acid if a 50.0 mL sample has a mass of 92.5 g? (A) 4.63 g/mL = (B) 42.5 g/mL = (C) 0.541 g/mL §=(D) 1.85 g/mL (BE) none of these 4 8. In chemistry, the term mole refers to se (A) an Avogadro’s number of things (B) 6.02 x 10” items (C) the mass in grams of 6.02 x 107 items (D) all of the above (E) none of the above ( _2., 9. A graduated cylinder contains 50.0 mL of water. When 40 dimes weighing 68.40 g are added and submerged, the level of the water in the graduated cylinder reaches 60.4 mL. What is the he -density of a dime? tO Amal (A) 0.152 g/mL (B) 0.164 g/mL = (C)6.58 g/mL ~—(D) 1.10 g/mL (E) 45 g/mL |