How many moles of KNO3 must be added to 0.525 L to make a 0.89 M solution?

the answer is 1 i believe

> b takes place in the gas phase in an isothermal tubular reactor. the feed is one mole of a per one mole of c, an inert. the entering temperature and pressure are 427°c and 10 atm, respectively. the gas constant r = 0.08206 atm · l/mol · k.