how do I write a balanced equation for the following chemical reactions: a) Solid benzoic acid (C7H6O2) reacts with oxygen gas in a combustion...

how do I write a balanced equation for the following chemical reactions:

a) Solid benzoic acid (C7H6O2) reacts with oxygen gas in a combustion reaction to produce carbon dioxide and water.

b) Titanium(IV) chloride forms in the reaction between titanium metal and chlorine gas.