Phenobarbital is a medical drug used to control seizures in patients. if a doctor prescribes a dose of 0.1g for a patient and each phenobarbital tat contains 25 mg, how many tabs does the patient need to take? 1 tab
2 tabs
3 tabs
4 tabs

Nitric acid can be formed in two steps from the atmospheric gases nitrogen and oxygen, plus hydrogen prepared by reforming natural gas. in the first step, nitrogen and hydrogen react to form ammonia: (g) (g) (g) in the second step, ammonia and oxygen react to form nitric acid and water: (g) (g) (g) (g) calculate the net change in enthalpy for the formation of one mole of nitric acid from nitrogen, hydrogen and oxygen from these reactions. round your answer to the nearest .