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PracticeExam1_Chem1300_Ch1_3

PracticeExam1_Chem1300_Ch1_3 - Name Date 1 What is defined...

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Name: __________________________ Date: _____________ 1. What is defined as a tentative explanation for observations that are made that result in the formulation of this concept? A) Law B) Hypothesis C) Theory D) Phenomena E) Prediction 2. If a liquid contains 60% sugar and 40% water throughout its composition then what is it called? A) Solute B) Compound C) Homogeneous mixture D) Heterogeneous mixture E) Solvent 3. How many milliliters is 0.0055 L? A) 0.55 mL B) 5.5 mL C) 0.5 mL D) 0.0000055 mL E) 182 mL 4. A large pizza has a diameter of 15 inches. Express this diameter in centimeters. (1in = 2.54cm) A) 38 cm B) 24 cm C) 18 cm D) 9.3 cm E) 5.9 cm 5. If normal body temperature is 98.6 °F then what is this in Celsius? A) 34°C B) 35.5°C C) 36.4°C D) 37°C E) 38.7°C Page 1

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6. If the temperature is 38°F then what is the temperature in Kelvin? A) 3.33 K B) 100.4 K C) 276.5 K D) 311.15 K E) 235.15 K 7. If you have a graduated cylinder containing 15.5 mL and this volume changes to 95.2 mL after a metal with a mass of 7.95g is dropped into the graduated cylinder then what is the density of this metal? A) 0.0835 g/mL B) 0.513 g/mL C) 0.0718 g/mL D) 10.0 g/mL E) 9.97 10 -2 g/mL 8. The speed needed to escape the pull of Earth ' s gravity is 11.3 km/s. What is this speed in mi/h? (1 mile = 1609 m) A) 65,500 mi/h B) 25,300 mi/h C) 18,200 mi/h D) 1,090 mi/h E) 5.02 10 -3 mi/h 9. One of the common intravenous fluids, called physiological saline, is a homogeneous mixture of NaCl in water. In this mixture, 0.89% of the mass is contributed by the NaCl. What mass of NaCl is found in 450. mL of physiological saline? (Given: density of physiological saline = 1.005 g/cm 3 ) A) 2.0 g B) 4.0 g C) 5.1 g D) 508 g E) 400 g 10. Which of these is an example of a physical property? A) Corrosiveness of sulfuric acid B) Toxicity of cyanide C) Flammability of gasoline D) Neutralization of stomach acid with an antacid E) Lead becomes a liquid when heated to 601°C Page 2
11. Which one of these represents a chemical change?

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PracticeExam1_Chem1300_Ch1_3 - Name Date 1 What is defined...

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