World of Chemistry

I. Measurements

I-III. Word Problems

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?

Rosamaría Fong, Instructor of Chemistry,
British Columbia Institute of Technology, Burnaby, B.C. Canada.

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Rosamaría Fong, Instructor of Chemistry
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