If the kpseudo of the reaction of crystal violet with a substantially larger amount of naoh (0.1 m) is 0.5 s-1 what is k for the overall reaction? (show inverse units as unit^-1)

If 3.50 g of the unknown compound contained 0.117 mol of c and 0.233 mol of h, how many moles of oxygen, o, were in the sample? express your answer to three significant figures and include the appropriate units.