Magnesium combines with oxygen to produce magnesium oxide. The reaction is represented by: $\text{2Mg} + \text{O}_2 \rightarrow \text{2MgO}$. What mass of magnesium oxide is produced when $48\,\text{g}$ of magnesium is burnt?
- A$20\,\text{g}$
- B$40\,\text{g}$
- C$80\,\text{g}$
- D$160\,\text{g}$