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Molecular compound Formula units
Atomic element Molecular element
The prefix per- means more of an element than is found in another compound of those same elements The prefix hypo- means less of an element than is found in another compound of those same elements
Molecular mass expressed in units of gram per mole = molar mass.
The formula of the compound. The experimental mass analysis of the compound.
The fact that NaCl is 39% Na by mass means that 100g of NaCl contains 39g Na. (100g NaCl ≡ 39g Na)
The coefficients can be used to relate all the species in terms of molecules and atoms, number of moles or weight by using the symbol '≡' which stands for equivalence.
The theoretical yield will always come from the limiting factor.
OR: A (%w/w) = A g solute/100 g solution
OR: A (%v/v) = A mL solute/100 mL solution
ppm = grams of solute/10^6 milliliters of solution
ppm = grams of solute/10^6 grams of preparation
ppm = milliliters of solute/10^6 milliliters of solution
OR: A ppb = A g solute/10^9g solution
1 g of solute per billion grams of solution 1 μg of solute per liter of solution
ppb = grams of solute/10^9 milliliters of solution
ppb = grams of solute/10^9 grams of preparation
ppb = milliliters of solute/10^9 milliliters of solution
OR: A molar = (A mol solute/1 liter solution)
Readings which differ by values greater than 0.20 mL may have to be discarded when calculating the average volume of titrant.
