Which o^ these possesses more mass, a sphere of Mecury (Hg) with a diameter of 2.00 cm or a cube of lead (Pb) measuring 2.00 cm on each side? Volume of a sphere = 4/3(pie)r^3.
pi NOT pie!!!
You need to look up the densities of Hg and Pb, then multiply each volume by its density to find the two masses.
Then just compare them.