What is the name of this molecule?

What’s the percent by mass of carbon in c10h14n2

Analyze how limestone is weathered and identify the features that are formed as a result of this dissolution

The chemical equation below shows the reaction of sodium (na) and chlorine (cl) to form sodium chloride (nacl). 2na + cl2 → 2nacl in this equation, which of the following is a reactant? i. sodium ii. chlorine iii. sodium chloride