Presentation on theme: "UNIT II.4 Density. II.4 DENSITY Definitions: Mass = Density ="— Presentation transcript:
UNIT II.4 Density
II.4 DENSITY Definitions: Mass = Density =
II.4 DENSITY Example 1: A 3.50mL chunk of boron has a mass of 8.19 g. What is the density of the boron?
II.4 DENSITY Example 2: (p. 24 ex b) If mercury has a density of g/L, what volume (in mL) is occupied by 425 g of mercury?
II.4 DENSITY Important Facts: Fact #1 : For water at 4°C, d = g/L or d = g/mL Given this density, knowing the volume of water gives its mass and vice versa. 1g = 1 mL (for water)
II.4 DENSITY Fact #2: LESS DENSE objects and liquids will float on liquids having a GREATER density. Object will SINK if: d OBJECT > d LIQUID Object will FLOAT if: d OBJECT < d LIQUID For example, a cork will float and a rock will sink in water! QUESTIONS: p. 26 #32-40