units
nu- no units on answer
iu- incompatible units in calculation
wu-wrong units
sf- wrong significant figures
chemical structures
c3 (or c5 etc) carbon valence is incorrect. similar notation for
n,o, h, etc.
fcx formal charge is wrong or is not given
lpx lone pairs are not included or are wrong.
wc-wrong charge on species or no charge given on species
reactions
wr -what reaction? or show reaction
ncb- no charge balance in chemical reaction
nab -no atom balance in chemical reaction
nacb - no charge or atom balance in chemical reaction eq.
wrx- wrong incorrect chemcial reaction
nax- na ion is in a reaction other than a solubility reaction
work
sw-show your work
NCW- nice clear work
ictwthyd- i can't tell what the hell you're doing.
ygtbk- you've got to be kidding. roe- run on equation: usually
right handside of string is not equal to left hand side of string
rorx-run on chemical reaction equation. see above
we- wrong equation to start.
RM-right method but wrong substitution or
wrong info to start or some other mistake.
cf- wrong conversion factor
cfu-conversion factor units do not cancel.
ce-calculation error
ce-pcr CHM 345 only- calculation error -please correct and resubmit
general VG or :)- very
good.
ugh! -you should know better than this