The image below shows a weather service map.. i’m not sure if is correct

Chemistry worksheet - i am not sure what they are asking for exactly?

How many moles are in 43.9 l of oxygen

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