For the precipitation lab, what would be an appropriate use of a beaker?

During which time interval does the object travel approximately 10 meters

12. calculate the hydroxide ion concentration of a solution with ph = 3.25. show all calculations leading to an answer

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.