The active ingredient in aspirin is acetylsalicylic acid. a 2.51-g sample of acetylsalicylic acid required 27.36 ml of 0.5106 m naoh for complete reaction. addition of 13.68 ml of 0.5106 m hcl to the flask containing the aspirin and the sodium hydroxide produced a mixture with ph = 3.48. determine the molar mass of acetylsalicylic acid and its ka value. state any assumptions you must make to reach your answer.

Calcium chloride +gold(1) oxide—>

Compare and contrast physical changes with chemical changes.

Many free radicals combine to form molecules that do not contain any unpaired electrons. the driving force for the radical–radical combination reaction is the formation of a new electron‑pair bond. consider the chemical equation. n(g)+no(g)⟶nno(g) n(g)+no(g)⟶nno(g) write lewis formulas for the reactant and product species in the chemical equation. include nonbonding electrons. n(g)n(g) select draw rings more erase select draw rings more erase select draw rings more erase n no(g)