1. The density of uranium, U, is 18.95 g/mL. What is the volume, in mL, of 123 g of uranium?

6.49 mL
0.154 mL
0.273 mL

2. A square piece of aluminum foil, 5.0 cm, along the edge, is found to weigh 0.1148 g. Given that the density of aluminum is 2.70 g/cm³, what is the thickness of this foil in angstrom.

3. 1.00 g of oxygen gas, O₂ gas has a volume of 670.2 mL. The same mass of carbon dioxide gas, CO₂ occupies 505.8 mL. What are the densities of the two gases?

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Chemistry Department
British Columbia Institute of Technology, Burnaby, B.C. Canada.
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