Skilled developed: Be able to convert concentration unit between mass basis and molar basis. Suppose you are an environmental consultant investigating lead release from a smelter and the concentration of lead (Pb2+) in nearby water was found to be 10 mg/L.(a) Convert 10 mg/L of Pb2+ to ppm (parts-per-million). Assume density of water is 1.0 g/cm3.(b) Convert 10 mg/L of Pb2+ to mmol/L. Note that mmol (milli-mole) is 1/1000 of one mole. Show your work.
Investigating - to observe or study by close examination and systematic inquiry. intransitive verb. : to make a systematic examination. especially : to conduct an official inquiry. investigation.
Density (volumetric mass density or specific mass) is the substance's mass per unit of quantity. The image most customarily used for density is ρ (the decrease case Greek letter rho), even though the Latin letter D can also be used. Mathematically, density is described as mass divided with the aid of extent:
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