1. Consider the chemical reaction demonstrated by the balanced chemical equation below. Determine how many molecules of O, reacted to produce 49.0 g of CO2.
2 C, H,O, F (9) +3 02 (9) - 4 CO2 (g) + 2 H2O (9) + 2 HF (9)

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