Question

A spherical sample has a mass of 2.813 g it has a diameter of 8.0 mm what is the sphere made of

Answer 1

The sphere is probably made of silver.

V = ⁴/₃πr^3 = ⁴/₃π(0.40 cm)^3 = 0.268 cm^3

D = m/V = 2.813 g/0.268 cm^3 = 10.5 g/cm^3

The density of silver is 10.5 g/cm^3.

Answer 2

the answer is to determine the density, we use the following formula:

mass= 2.813 grams

volume= ?

we need to first calculate the volume before we can solve for the density. since the question states that the sample has a spherical shape, we can use the volume formula of spheres to find it.

radius (r)= = 

let's plug in the values

V= 

we need to change the  to  using the following conversion

1 cm= 10 mm

now we can find the density. 

density= 2.813 grams/ 0.268 cm= 10.5 g/cm3