When anhydrous magnesium nitrate, $\text{Mg(NO}_3)_2$, is heated, it decomposes to produce a white solid and a mixture of two gases $X$ and $Y$. $Y$ is oxygen. Determine the ratio $\dfrac{\text{mass of } X \text{ released}}{\text{mass of } Y \text{ released}}$?
- A$\dfrac{1}{0.174}$
- B$\dfrac{1}{0.267}$
- C$\dfrac{1}{0.348}$
- D$\dfrac{1}{3.43}$