Chemistry and Chemical Reactivity (9th Edition)

$P_2=0.075\ atm$
a) From the given data: $r=0.17/h\times0.010\ M=0.0017\ M/h$ b) For first-order reactions: $t_{1/2}=0.693/k=4.08\ h$ c) Knowing that $P\propto C$, initially there is 0.010 M and 0.05 atm, after one half life, there is 0.005 M of SO2Cl2, 0.005 M of SO2 and 0.005 M of Cl2 so: $P_2/0.05\ atm=0.015/0.010\rightarrow P_2=0.075\ atm$