Question

A supposedly silver crown is tested to determine its density. it displaces 10.7 ml of water and has a mass of 112 g. part a could the crown be made of silver?

Answer 1

The volume of water displace by crown is 10.7 mL. This will be equal to the volume of crown. Mass of crown is 112 g.

Density of a substance is defined as mass of substance per unit volume. It is mathematically represented as follows:

`d=(m)/(V)`

Putting the values,

`d=(112 g)/(10.7 mL)=10.46 g/mL`

The theoretical value of density of silver is
`10.5 g/cm^(3)` also, 1 mL is equal to
`1 cm^(3)` thus, density will be 10.5 g/mL.

This is approximately equal to the calculated value thus, the crown is made up of silver.