A student group investigated how 5g of solid zinc reacts with 15 g of hydrochloric acid(HCI) solution. The diagram shows the groups setup and observations during the investigation.
Compare the mass of the zinc and HCI before and after the reaction. Which statement best explains the difference in mass?
OA The reactants used energy, causing a lower mass in the products.
OB. The lower mass is a result of the new gas leaving the flask.
O c. Since the solid zinc did not react completely, some reactant atoms were not part of the products.
O D. The solid zinc and the HCI solution were mixed, resulting in a mass difference.
