Chapter Three: Chemical Concepts. By: Andie Aquilato. Units of Measurement. Slides 2-5. SI Units. Mass: kilogram (kg) Length: meter (m) Time: seconds (s) Amount of substance: mole (mol) Temperature: Kelvin (K) Electric current: ampere (A) Luminous intensity: candela (cd).
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By: Andie Aquilato
giga- 109 (G)
mega- 106 (M)
kilo- 103 (k)
deci- 10-1 (d)
centi- 10-2 (c)
milli- 10-3 (m)
micro- 10-6 (µ)
nano- 10-9 (n)
pico- 10-12 (p)
femto- 10-15 (f)
atto- 10-18 (a)Prefixes for Units
= 1 mol C + 2 mol H + 1 mol O
= 12.011 g + 2(1.0079 g) + 15.9994 g
= 30.0262 g
We know that one mol of BaCl2∙H20 yields 1 mol BaCl2, so we’ll figure out how much BaCl2∙H20 we need to make a 0.108 M BaCl2∙H2O solution
Since the solution is so dilute, we can assume that ppm = mg solute/L soln, therefore the solution is 63.3 mg/L of K3Fe(CN)6.
(g/mL or kg/L)
1 Hanuschak, Gregor. SparkNote on Stoichiometric Calculations. 9 Dec. 2005 <http://www.sparknotes.com/chemistry/stoichiometry/stoichiometriccalculations>.