Identify the type fo reaction below: N2+__H2→ __NH3 synthesis or double replacement

Synthesis or combination.

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

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B) m = 90 – 6d

Step-by-step explanation:

If she memorizes 18 new measures for every 3 days, then she memorizes

for each day in average.

ıf d=the number of days of practice since she began learning the piece, then she memorizes 6×d (6d) measures each day.

Then, the number of measures Harita still needs to memorize, as a function of d can be stated as:

90-6d