1. Do Now 1)Calculate the density of an unknown substance that weighs 2.5 grams and takes up 3.5 mL. 2)What volume of gold weighs 0.2 kg when the density of gold is 19.30 g/mL.

2. Objective I CAN differentiate between a solid, liquid, and gas by describe the differences between the particle spacing and intermolecular forces.

3. Solids, liquids, gases

6. Significant Figures 3.040 0.0045 4500 4.5003 4500. 10.000 00.003030

7. Significant Figures math (3.3 x 10 23 cm) x (0.005 cm) = ?? 127.45 g + 155.55 g = ?? 90.00 m x 3.000 m = ??

8. Conversions 450 km = ?? Nm 5 Gm = ?? Pm 20 cm = ?? km