Online Lab Submission
Students:
Instructors:
PreLab Assignments
Interactive Animations:

Unique EndofLab Problems
Postlab problems can be "unique" to the user by using . . . .
 student numbers (lab data and calculations) stored in the database  any number shown on a student's webpage can be used in a postlab problem. Use your creativity to challenge students in ways not possible in the paper environment.
You reported a value of 0.0811 for R using the pressure_{CO2}, volume_{CO2}, temperature_{CO2} and mass_{NaHCO3} collected in lab . . . . what mass of NaHCO_{3} would you need to start with for your experimental R to be 0.08205 if the water vapor pressure was 25.1 torr (assume all the other parameters are the same as reported in your data section)?
 random numbers  the Chem21Labs program can include in the postlab question one or more unique random numbers with a specific number of significant figures and within a specified range.
