Chem 120 final exam 4 GRADED A+ (ACTUAL EXAM ) Questions and Answers (Solved)

Document Content and Description Below

1. Exam 1- Which of the following correctly describes a physical change? Burning a candle, Rusting of iron, Photosynthesis of glucose, Subliming ofdry ice. Answer: Subliming of dry ice 2. If someon... e is conducting a study on trees, the statement "leaves turn colorin the fall b/c the amount of sunlight they receive is reduced is a: Answer: Hypothesis 3. The number of significant figures in the measurement of 45.030 mm is Answer: Five 4. Write the following number in scientific notification to two significant figures: 0.00060 cm Answer: 6.0 x 10-4 cm 5. What is the correct answer to the following expression using the rules for significant figures? 12.439 + 9.375 - 15.7 Answer: 6.1 6. Given the density of gold is 19.3 g/cm3, what volume will 259 g of goldoccupy? Answer: 13.4 cm3 7. Air is considered a: Answer: Homogeneous Mixture 8. On a cold winter day, the temperature is -6.0 °F.What is that temperature in degrees Celsius? Answer: -21.1 °C [Show More]

Last updated: 2 months ago

Preview 1 out of 9 pages