The weighted average atomic mass of an element depends upon the
a. relative abundance of protons in the element
b. mass and relative abundance of each isotope of that element
c. mass and relative abundance of each neutron of that element
d. mass of the protons and the electrons in the element

h let me think

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.