Question

A cube of metallic lead that is 2.500 cm on a side has a mass of 177.34 g at 25° C. What is

the mass (kilograms) of lead in a cylinder that has a diameter of 5.00 cm and a length of
172.4 cm? The volume of a cylinder is V=pi r 2 h. Round to one decimal place.

Answer 1

The mass of the lead in the cylinder would be 24.4 kg. To calculate this, you need to first calculate the volume of the cylinder, using V=pi r2 h. With a diameter of 5 cm, the radius is 2.5 cm, and the height is 172.4 cm. Thus, the volume of the cylinder is 435.3 cm3. Then, to find the mass, you need to multiply the volume by the density of lead, which is 7.37 g/cm3 at 25° C. This gives you a mass of 24.4 kg.