The decomposition equation for magnesium nitrate is shown below. $2\text{Mg(NO}_3)_2\text{(s)} \rightarrow 2\text{MgO(s)} + 4\text{NO}_2\text{(g)} + \text{O}_2\text{(g)}$. What volume of gas is formed when $0.1$ moles of magnesium nitrate are decomposed completely?
- A$1.2\,\text{dm}^3$
- B$4.8\,\text{dm}^3$
- C$6.0\,\text{dm}^3$
- D$8.4\,\text{dm}^3$