Which two considerations are used to calculate a windchill factor? wind speed and air temperature
air pressure and wind direction
wind direction and atmospheric heating
atmospheric heating and air temperature

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