The industrial ammonia synthesis has been found to proceed by the dissociation of molecular nitrogen into atoms before hydrogenation takes place. Construct two potential diagrams in which one involves an activation barrier for the turnover from a molecular adsorption state into a dissociated state and the other does not. Discuss the influence of increasing temperature for both possibilities.

Modern weaponry has increased the number of deaths in wars and violent conflicts.

The content of manganese (mn) in steel was determined spectrophotometrically and with the use of the standard addition method. an unknown sample of mn from a digested steel sample gave an absorbance of 0.185 when analyzed spectrophotometrically. when 5.00 ml of solution containing 95.5 ppm mn was added to 50.0 ml of the unknown steel solution (digested sample), the absorbance was 0.248. calculate the concentration, in parts-per-million (ppm), of mn in the digested steel sample solution.

What does a complete balanced chemical equation include? a. exothermic coefficients b. endothermic coefficients c. valence electrons d. molar coefficients