Question

Mass is 80g. Volume is 40ml. What is the density?

Answer 1

The density of an object is by definition its mass over its volume.

`\rho = m/V`
In the International system it has units of

`\ \textless \ \rho\ \textgreater \ =kg/m^3`

Thus the density of the given object is

`\rho =80(grams)/40(mL) = (80*10^(-3)(kg))/(40*10^(-6)(m^3)) =2000 (kg/m^3)`

because
`1(gram)=10^(-3) (kg)`
and

`1 mL =10^(-3) (Liter) =10^(-3) (dm^(3)) =10^(-6) (m^3)`