9) A 57.14 g sample of NaOH, sodium hydroxide, is dissolved in enough water to make 2.050 liters of a stock solution. What volume of this stock solution is needed to prepare 1.000 L of 0.100 M NaOH?

At a certain temperature the rate of this reaction is first order in hi with a rate constant of : 0.0632s2hig=h2g+i2g suppose a vessel contains hi at a concentration of 1.28m . calculate how long it takes for the concentration of hi to decrease to 17.0% of its initial value. you may assume no other reaction is important. round your answer to 2 significant digits.