2. A student performs this experiment and obtains the data presented in Question 1 but forgets to record the temperature of the water bath and uses a temperature of 298 K when calculating the
number of moles. Calculate the value of n he or she would obtain, and the % error that would
result.
I

i believe you are right for all except the 3rd ( look at sqdancefan his answer is much better)

aquifers are bounded above and below by impermeable rock. the driving force of groundwater movement in confined aquifers is pressure, rather than gravity.

"record the time to complete a chemical reaction" would most likely be part of a lab procedure.