In electrophilic aromatic substitution reactions, a -CO2H substituent on the aromatic ring is:

a. a deactivator and an o, p-director.
b. an activator and a m-director.
c. a deactivator and a m-director.
d. an activator and an o, p-director.

Achemistry student weighs out of phosphoric acid , a triprotic acid, into a volumetric flask and dilutes to the mark with distilled water. he plans to titrate the acid with solution. calculate the volume of solution the student will need to add to reach the final equivalence point. round your answer to significant digits.

What substance has a mass of 9.5g and volume of 2.1cm^3

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.