1. Sig Digs Lab Practice (Show units and correct sig digs.) Al strip: Measure the mass, length, and width. Calculate:Mass Area Given that the density of Al is 2.70 g/cm 3, determine the thickness (h) of the Al strip.

2. Rubber stopper: Measure the mass and determine the volume by water displacement. Calculate the density.

3. Al strip: Mass Length Width Calculate: Mass Area h = ? Rubber stopper: Mass V f V i V RS Calculate: Density = D = 2.70 g/cm 3

5. Al strip: Mass1.31 g(1.28 g – 1.33 g) Length10.20 cm(10.10 cm – 10.30 cm) Width1.00 cm(0.90 cm – 1.10 cm) Calculate:Mass1.31 g = 0.128 g/cm 2 Area10.2 cm 2 D = M V = M = 1.31 g = 0.485 cm 3 V D 2.70 g/cm 3 V = l x w x hh = V = 0.485 cm 3 l x w 10.20 cm x 1.00 cm h = 0.0475 cm

6. Rubber stopper: Mass 9.67 g(9.33 g – 10.00 g) V f mL V i mL V RS 5.6 mL(4.6 mL – 6.7 mL) Density = M = 9.67 g =1.7 g/ mL V 5.6 mL(1.4 – 2.1)