Oxygen Gas Is Formed by the Decomposition of Potassium Chlorate $\rightarrow$

Oxygen gas is formed by the decomposition of potassium chlorate at high temperatures according to the reaction 2 KClO₃ (s) $\rightarrow$ 2 KCl(s) +3 O₂ (g) .Suppose 1.23 g KClO₃ is placed in a container connected to an open-end mercury manometer on a day when atmospheric pressure is 1.00 atm.Once the reaction is complete, the height of the mercury column in the U-tube on the side of the reaction container rises by 172 mmHg.What is the pressure of O₂ gas produced by the reaction?

A) 1348 torr
B) 0.774 atm
C) 22.9 kPa
D) 0.559 bar
E) 36.7 in Hg