Answer:
Synthesis or combination.
Step-by-step explanation:
Hello there!
In this case, according to the given chart containing the types of reactions, it turns out possible for us infer this given reaction:
____ N2+__H2→ __NH3
Is synthesis or combination, because it follows the pattern A + B --> C. Moreover, it can be balanced as shown below:
N2+3H2→ 2NH3
Regards!