2NaHCO3 (s) —> Na2O (s) + 2 CO2 (g) + H2O (g)
Calculate the mass of sodium oxide, Na2O, produced if 0.5 g of sodium bicarbonate, NaHCO3 is decomposed

Molar mass NaHCO3= 84.006 g/mol
Molar mass Na20= 61.979 g/mol

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.