Exam 1 review

• List the 7 diatomic molecules• Chemical and physical properties• Chemical and physical changes• Pure substances• Characteristics of matter• Groups 1 and 2 elements

• Leroy is doing an experiment to see how the addition of sugar helps plants grow faster.– What is the dependent variable?– What is the independent variable?

• Roger measures 30 mL of water into a graduated cylinder. He then drops a rock into 40 mL. What is the volume of the rock?

• The mass of an object is 120 g. Its volume is 180 mL. Will it float in pure water?

• The density of lead is 11.342 g/mL. What would be the volume of a 100.0 g sample of this metal?

• A mechanical pencil has the density of 3 grams per cubic centimeter. The volume of the pencil is 12.6 cubic centimeters. What is the mass of the pencil?

• 155 g = _______ Kg• 160 mg = ______ g• 450 cm = ________ mm• 569 mL = __________ L

• 155 g = 0.155 Kg• 160 mg = 0.160 g• 450 cm = 4500 mm• 569 mL = 0.569 L

• What common object has the mass of about 1 gram?

• 1 L is about ____ quarts or _____ gallons• 1 Kg= ______ pounds• A meter is about how many feet long? • 5 miles is about how many Km

Density sheet answers• 1 and 2 done in class• 3. 1.76 g/ml• 4 136.3 g• 5 817.6 g• 6. 16.5 cm3

• 7. 17.63 g• 8. 2.34 g/ml• 9. 47.4 g• 10. 0.418 cm3If your answer is different, just make sure the difference

is due to rounding.