SCIN 131 Exam Quiz 1-3 | Questions with Solutions 2023

SCIN 131 Exam Quiz 1-3 | Questions with Solutions 2023. Express 0.0045 m in scientific notation. A.0.45 × 104 m B.4.5 × 104 m C.4.5 × 10-4m D.4.5 × 103m E.4.5 × 10-3 m Answer Key: E Feedback: Good. Scientific notation is discussed in section 2.2 of the text. Question 5 of 12 4.0/ 4.0 Points The correct prefix for the multiplier 10-15 is: A.femto. B.deci. C.tera. D.pico. E.none of the above Answer Key: A Feedback: Good. Prefixes are discussed in section 2.5 of the text. Part 3 of 4 - 16.0/ 20.0 Points Question 6 of 12 0.0/ 4.0 Points `Aluminum has a specific heat capacity that is about twice that of iron. To balls of each metal, both with the same mass, and that have an initial temperature of 95 degrees C, are dropped into a completely insulated container that has the same mass of water but an initial temperature of 30 degrees C. When thermal equilibrium is finally achieved (i.e. temperatures are no longer changing), which of these statements will be true? A.Both balls will reach the same final temperature B.The iron ball will reach a higher final temperature than the aluminum ball. C.The aluminum ball will reach a higher final temperature than the iron ball. D.The difference in the final temperatures of the balls depends on the initial mass of the water. E.The difference in the final temperatures of the balls depends on the intial temperature of the water. Answer Key: A Feedback: This is a specific heat capacity problem. No calculation needed, just an understanding of the concept. Question 7 of 12 4.0/ 4.0 Points `How should someone classify salt? A.mixture-homogeneous B.pure substance-compound C.mixture-heterogeneous D.pure substance-element E.none of the above Answer Key: B Question 8 of 12 4.0/ 4.0 Points `Chemical properties are: A.those that a substance displays without changing its composition. B.those that a substance displays only through changing its composition. C.identical for all solid matter. D.those that cause atoms and molecules to change. E.none of the above Answer Key: B Question 9 of 12 4.0/ 4.0 Points `A cube of copper and cube of zinc that have the same mass and same initial temperature have a certain amounf of heat (Q) removed from them. The final temperatures are different. What property causes this difference? A.density B.heat of vaporization C.specific heat capacity D.volume E.none of the above Answer Key: C Feedback: Good. This is simply an application of the specific heat equation. Question 10 of 12 4.0/ 4.0 Points `What is the value of 39°C on the Fahrenheit temperature scale? A.312.15 B.102.2 C.7 D.3.89 E.none of the above