Sunday, October 16, 2011
AP Chapter 4 Submissions
AP Chem- Most of the submitted answers had some minor errors.
Most of you are reducing the numbers to just ONE significant figure, right in the middle of a multi-step calculation! Do not do that on the test tomorrow.
For example, when your calculator gives you a result of 2 x 10^-3 mol, yet the answer requires THREE sig figs, you do NOT write .002 mol, which is just ONE sig fig; you must write, .00200 mol.
You should be paranoid of ANY one non-zero digit answer to any question - at least check to see whether the one digit is appropriate.
Anyway, for the effort to submit your answers (which should have been proofed), each student who handed in her/his answers on Friday will get +2 bonus points on Monday's test.
Most of you are reducing the numbers to just ONE significant figure, right in the middle of a multi-step calculation! Do not do that on the test tomorrow.
For example, when your calculator gives you a result of 2 x 10^-3 mol, yet the answer requires THREE sig figs, you do NOT write .002 mol, which is just ONE sig fig; you must write, .00200 mol.
You should be paranoid of ANY one non-zero digit answer to any question - at least check to see whether the one digit is appropriate.
Anyway, for the effort to submit your answers (which should have been proofed), each student who handed in her/his answers on Friday will get +2 bonus points on Monday's test.
# posted by C @ 10:17 AM 
