An element crystallizes in a face-centered cubic lattice, and it has a density of 1. 45 g/cm3. The edge of its unit cell is 4. 52x10-8 cm. How many atoms are in each unit cell? what is the volume of a unit cell? what is the mass of a unit cell? calculate an approximate atomic mass for the element.

The graph shows a trend in an ecosystem over time caused by increased pollution in the region. what can you conclude from the graph? a. there’s lower biodiversity among birds. b. there’s a higher reproductive rate among birds. c. there’s a significant decline in the number of producers. d. other types of animals were unaffected by pollution.