Aspirin is the analgesic acetylsalicylic acid C9H8O4. What is the coefficient of oxygen in the balanced equation for the combustion of solid acetylsalicylic acid to carbon dioxide and liquid water? a. 3.b. 2.c. 1.d. 4.e. 8.f. 7.g. 9.h. 10.i. 5.