Question

(Chemistry question)
In the reaction C6H5OH + O2 --> CO2 + H2O, how many grams of phenol are required to react with .200 moles of oxygen? (equation isn't balanced yet)

Answer 1

First balance the equation:

2 C6H5OH + 15 O2 --> 12 CO2 + 6 H2O

Phenol (C6H5OH) reacts with O2 in a 2:15 ratio. This means:

moles phenol 2
------------ = ---
moles O2 15

moles phenol = (2/15)*0.200 = 0.0267

Molar mass of phenol is 94 g/mol, so the mass of phenol would be 0.0267*94 = 2.5 g