What mass in grams of sodium carbonate, Na, CO3is produced if 50.0 g of sodium oxide, Na2O, are reacted
with excess carbon monoxide, CO, according to the fol-lowing chemical equation? (Hint: see Sample Problem
8A.)
2Na2O(s) + CO(g) — Na2CO3(s) + Na(s)

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.

let that person have a turn to speak : )