Answer: 8- 1.3g/mL and 9- 1.75g/cm^3
Explanation:
The questions already included the mass and volume, so all you needed to do is to put the numbers in the formula for density. Density (g/mL or g/cm^3) = Mass (g) divided by Volume (mL or cm^3).
8-
D = M/V
D = 78g/60mL
D = 1.3g/mL
9-
D = M/V
D = 1300g/743cm^3
D = 1.75g/cm^3