Of the following which is the most concentrated solution a) 12 g/ml b)1.2 g/ml c)0.12 g/ml d)0.012 g/ml

I think A. 12 G/ML was the answer

the equation that correctly represent the reaction for formation of ammonia is

n2+ 3h2 → 2nh3 (answer d)

1 mole of nitrogen gas (n2) react with 3 moles of hydrogen gas (h2) to form 2 moles of ammonia ( nh3). this is in a process known as haber process were iron is used as a catalyst and reaction take place that a higher temperature and pressure. the process is exothermic hence energy is released.