Write the Henderson-Hasselbalch equation for a propanoic acid solution ( CH 3 CH 2 CO 2 H CH3CH2CO2H , p K a = 4.874 pKa=4.874 ) using the symbols HA HA and A − A− , and the given p K a pKa value for propanoic acid in the expression. ?

Ican determine the molar mass of an element by looking on the under the atomic mass for the element. for example the molar mass of phosphorus is 30.974 grams/mole. avogadro’s number tells me the amount of representative particles in 1 mole of any substance. this means 12.011 gram sample of carbon and a 32.0 gram sample of sulfur have the same number of atoms.