Tomorrow we will be concluding our Physical and Chemical Changes formal lab.

Here are some review questions on density tonight:

- What is the density of CO gas if 0.196 g occupies a volume of 100 ml?

2. A block of wood 3 cm on each side has a mass of 27 g. What is the density of the block? (Hint, don’t forget to find the volume of the wood.)

- An irregularly shaped stone was lowered into a graduated cylinder holding a volume of water equal to 2 ml. The height of the water rose to 7 ml. If the mass of the stone was 25 g, what was its density?

- A 10.0 cm
^{3} sample of copper has a mass of 89.6 g. What is the density of copper?

- Silver has a density of 10.5 grams/cm
^{3} and gold has a density of

19.3 g/cm^{3}. Which would have the greater mass, 5cm^{3} of silver or 5cm^{3} of gold?

- Five mL of ethanol has a mass of 3.9 g, and 5.0 mL of benzene has a mass of 44 g. Which liquid is denser?

- A sample of iron has the same dimensions of 2 cm x 3 cm x 2 cm. If the mass of this rectangular-shaped object is 94 g, what is the density of iron?