# A student heats 30g of CaCO_3 to produce CaO and CO_2. How many mole of CaO are produced?

$C a C {O}_{3} \left(s\right) + \Delta \rightarrow C a O \left(s\right) + C {O}_{2} \left(g\right) \uparrow$
$\text{Moles of calcium carbonate}$ $=$ $\frac{30 \cdot g}{100.09 \cdot g \cdot m o {l}^{-} 1}$ $=$ $0.30 \cdot m o l$.