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Chemistry RQ

Module 1 - Review Questions

1. Which of the following contains no matter? (a.) A rock (b.) A balloon full of air (c.) A balloon full of helium (d.) A lightning bolt (d.) A lightning bolt
2. List the base metric units used to measure length, mass, time, and volume. Meter, gram, second, and liter.
3. In the metric system, what does the prefix "centi" mean? One hundredth.
4. Which has more liquid: a glass holding 0.5 kL or a glass holding 120 mL? A glass holding 0.5 kL
5. How long is the bar in the picture on page 35? 26.6 mm
6. Two students measure the mass of a 502.1 gram object. The first student measures the mass to be 496.8123 grams. The second measures the mass to be 501 grams. Which student was more precise? Which student was more accurate? The second student was more precise. The first student was more accurate.
7. How many significant figures are in the following numbers? (a.) 0.0120350 (b.) 10.020 (c.) 12 (d.) 3.40 x 10³ (a.) Seven (b.) Five (c.) Two (d.) Three
8. A student measures the mass of an object as 2.32 grams and its volume as 34.56 mL. The student then calculates the density to be 0.067129629. There are two things wrong with the student's value for density. What are they? The unit of measurement is not stated and the numerical value is not rounded to the nearest hundredth.
9. Why does ice float on top of water? Because it is less dense than water.
10. Lead has a density of 11.4 grams per mL, whereas gold has a density of 19.3 grams per cc. If I were to make two identical statues, one out of gold and the other out of lead, which would be heavier? The gold statue.
Created by: LiseBrinkley