# What is the density of a substance with a mass of 9 g and a volume of 27 cm^3?

Oct 1, 2016

$\text{Density, } \rho \cong 0.33 \cdot g \cdot c {m}^{-} 3$.

#### Explanation:

$\text{Density}$ is simply the quotient, $\text{mass"/"volume}$.

Given 2 of the 3 parameters, thus we can work out the third.

Here, we have been given (conveniently!) $\left(i\right)$ the mass, and $\left(i i\right)$ the volume. So we take the quotient:

$\frac{\left(i\right)}{\left(i i\right)} = \text{mass"/"volume}$ $=$ $\frac{9 \cdot g}{27 \cdot c {m}^{3}}$ $=$ ??*g*cm^-3, and doing the problem with dimensions included gives us an answer in $g \cdot c {m}^{-} 3$ as required.