Jepet barazimi termokimik:
\[ 2\text{X}_{(ng)} + \frac{3}{2}\text{O}_2{}_{(g)} \rightarrow \text{X}_2\text{O}_3{}_{(ng)} \qquad \Delta H = -1624\ \text{kJ} \]
Kur prodhohet \(20\ \text{g}\) e \(\text{X}_2\text{O}_3\), çlirohen \(203\ \text{kJ}\) nxehtësi. Cila është masa atomike relative e \(\text{X}\)?
\[ A_r(\text{O}) = 16 \]
A) \(56\)
B) \(84\)
C) \(112\)
D) \(168\)