Benzene has been used as a solvent for varnishes, waxes, and oils. In 1981 the EPA listed benzene as a carcinogen. What is the molecular formula of benzene if the empirical formula is C1H1, and the approximate molar mass is 78 g/mol

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 .