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# Chemistry EPP

### Module 1 - Extra Practice Problems

1. Two students measure the mass of an object. The teacher knows that the mass is 4.5 g. The first student uses one scale and reports a mass of 4.4 g. The second student uses a different scale and reports a mass of 4.210 g. Which student is more precise? The first student.
1.(continued) Which is more accurate? The second student.
2. How many cg are in 13.1 g? 1310 cg
3. If an object has a volume of 45.1 mL, what is its volume in liters? 0.0451 L
4. If a road is 13.1 miles long, how many inches long is it? 830,016 in.
5. The volume of a box is given by the equation: (V = length ∙ width ∙ height) If a box measures 1.2 m by 3.4 m by 0.50 m, what is its volume in liters? 2040 L
6. Convert the number 0.00341 to scientific notation. 3.41 x 10⁻³
7. Convert the number 1.18 x 10⁷ into decimal notation. 11,800,000
8. How many significant figures are in the number 4500? Two.
9. How many significant figures are in the number 0.0405? Three.
10. How many significant figures are in the number 0.04500? Four.
11. If the mass of a liquid is 23.13 grams and its volume is 35.0 mL, what is its density? 0.661 grams per mL
12. The density of a metal is 2.12 grams per mL. What is the volume of 45 g of the metal? 21.23 mL
13. What is the mass of 0.67 liters of gold? 1.3 x 10⁴ g
Created by: LiseBrinkley