Q$2$: $(10$ marks$)$

The ventilating fan of the bathroom of a building has a volume flow rate of $30\frac{L}{s}$ and runs continuously. Determine the mass of air vented out in one day $(k\frac{g}{?}$ day$).$ Air molecular weight is $28\mathrm{.}96\frac{g}{m}ol$

$28\mathrm{.}96\frac{g}{m}ol$

$-15$

$W_{\text{a}\text{i}\text{r}}=m_{\text{a}\text{i}\text{r}}g!$

$28\mathrm{.}96=M_{\text{a}\text{i}\text{r}}9\mathrm{.}81$