The density of maple wood is about 755. kg/m. What is the mass of a solid piece of maple that has a volume 640. cm?

I believe that the correct given values are:

density = 755 kg/m^3

volume = 640 cm^3

First let us convert volume to m^3 units.

volume = 640 cm^3 * (1 m / 100 cm) ^3 = 6.4 x 10^-4 m^3

so the mass is:

mass = 755 kg/m^3 * (6.4 x 10^-4 m^3)

mass = 0.4832 kg = 483.2 g