The equation for the reaction between magnesium and oxygen is shown here. $\text{2Mg} + \text{O}_2 \rightarrow \text{2MgO}$ In an experiment, $6.0\,\text{g}$ of magnesium reacts with excess oxygen. Which mass of magnesium oxide, $\text{MgO}$, is formed?
- A$10\,\text{g}$
- B$20\,\text{g}$
- C$40\,\text{g}$
- D$80\,\text{g}$