The data you collected in lab may be entered in groups or as a single entry.
Once a 'data group' opens up, enter data in every open text box before clicking the
Submit button in the side panel. Once you Submit and Confirm your lab data, click the
Next Problem button to proceed down the page where you can enter answers to lab
calculations, essays, balanced equations, and multiple choice questions.
If you Submit /
Confirm incorrect data
, you can correct your data with the Change Incorrect Data link
at the top of this page.
Note: If you change / reset your data the program remembers any points you lost
on calculations using the incorrect data and deducts those points from your total
When you enter answers to calculations, you must pay attention to the
tolerances established by your Instructor which the program uses to grade your answer.
If you are expected to round your answer to the correct number of Significant Figures,
you will be notified in the side panel; otherwise, you need only enter a number that falls
between the correct number minus the tolerance and the correct number plus the
tolerance. The tolerance for any Chem21Labs calculation is found in the side panel once
you open a calculation by clicking the Next Problem button. If the Tolerance is
SF, it means that if your answer falls between the correct answer minus 2 in the 3
Significant Figure AND the correct answer plus 2 in the 3
Chem21Labs will count it as correct. In this example, the '3
SF' is the MINIMUM
number of significant figures required for the answer. If the tolerance is not
0 in a
certain Significant Figure, it is recommended that you use two more Significant Figures
than required as long as your answer is within the range created by the tolerance.
only the number for Lab Data and Calculations - never the unit.
short answers to questions can be entered at any time by clicking the Edit link
associated with the question. If you don't click the link, the essay editor will open
automatically after clicking the Next Problem button if it is next in the 'sequence'.
you 'click ahead' in the lab to enter essay answers, the Next Problem button may
not open a previous data box or calculation box - you can fix this by reloading the
page or clicking the Back to Main Menu link and clicking on the assignment again.
To use scientific notation you will use the
notation. For example, 4.5 x 10