Chemisty Review

Question

The density of osmium, which is the densest metal, is 22.57 g/cm³ . What is the mass of a block of osmium that measures 1.00 cm by 4.00 cm by 2.50 cm?

Answer 1

After finding the volume of the block, you can use dimensional analysis, as follows:

volume of block = 1.00 cm x 4.00 cm x 2.50 cm = 10.0 cm³

22.57 g/cm³ x 10.0 cm³ = 225.7 g = 226 g (to 3 significant figures)