A is a feature or some influence that contributes to a result or outcome. factor

theory

light year

spectrograph

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.

i would say b

explanation:

but i think i would need more information than that

answer:

technetium is the most reactive. this is followed by silver. the least reactive out of these three elements is strontium.

the answer is 0.42 is that is an option. this question provides no info