Presentation on theme: "EPPING, LQB381 SI units Dr Ron Epping LQB381 Unit Coordinator 1991 - 2012."— Presentation transcript:
EPPING, LQB381 SI units Dr Ron Epping LQB381 Unit Coordinator
EPPING, LQB381 COMMONWEALTH OF AUSTRALIA Copyright Regulations 1969 WARNING This material has been copied and communicated to you by or on behalf of The Queensland University of Technology pursuant to Part VB of The Copyright Act 1968 (The Act). The material in this communication may be subject to copyright under The Act. Any further copying or communication of this material by you may be the subject of copyright protection under The Act. Do not remove this notice.
EPPING, LQB381 Abbreviations SI m = milli μ = micro n = nano volumeLitre L millilitre mL microlitre μL nanolitre nL amount Mole mol millimole mmol micromole μmol nanomole nmol Gram g milligram mg microgram μg nanogram ng
EPPING, LQB381 Understand SI Units AMOUNT = kg or moles (g, mg, mmol) VOLUME = m 3 (cm 3 = mL, L) CONCENTRATION = AMOUNT / VOLUME –e.g. mg/mL, mg/L, kg/L, moles/L, μmoles/mL NOTE: some combinations are IDENTICAL –2.0 moles/L = 2.0 mmoles/mL = 2.0 μmoles/μL –3.0 g/L = 3.0 mg/mL = 3.0 μg/μL –note: In a formula, units cancel out! STICK TO SI UNITS DO NOT CONFUSE MOLES WITH MOLAR –MOLES is an amount –MOLAR (moles/L) is a concentration –Since many students confuse the two, stick to using “moles/litre”